Initial move to GIT
This commit is contained in:
Gordon Henderson
commit
bf0ad86017
|
|
@ -0,0 +1,165 @@
|
|||
GNU LESSER GENERAL PUBLIC LICENSE
|
||||
Version 3, 29 June 2007
|
||||
|
||||
Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
|
||||
Everyone is permitted to copy and distribute verbatim copies
|
||||
of this license document, but changing it is not allowed.
|
||||
|
||||
|
||||
This version of the GNU Lesser General Public License incorporates
|
||||
the terms and conditions of version 3 of the GNU General Public
|
||||
License, supplemented by the additional permissions listed below.
|
||||
|
||||
0. Additional Definitions.
|
||||
|
||||
As used herein, "this License" refers to version 3 of the GNU Lesser
|
||||
General Public License, and the "GNU GPL" refers to version 3 of the GNU
|
||||
General Public License.
|
||||
|
||||
"The Library" refers to a covered work governed by this License,
|
||||
other than an Application or a Combined Work as defined below.
|
||||
|
||||
An "Application" is any work that makes use of an interface provided
|
||||
by the Library, but which is not otherwise based on the Library.
|
||||
Defining a subclass of a class defined by the Library is deemed a mode
|
||||
of using an interface provided by the Library.
|
||||
|
||||
A "Combined Work" is a work produced by combining or linking an
|
||||
Application with the Library. The particular version of the Library
|
||||
with which the Combined Work was made is also called the "Linked
|
||||
Version".
|
||||
|
||||
The "Minimal Corresponding Source" for a Combined Work means the
|
||||
Corresponding Source for the Combined Work, excluding any source code
|
||||
for portions of the Combined Work that, considered in isolation, are
|
||||
based on the Application, and not on the Linked Version.
|
||||
|
||||
The "Corresponding Application Code" for a Combined Work means the
|
||||
object code and/or source code for the Application, including any data
|
||||
and utility programs needed for reproducing the Combined Work from the
|
||||
Application, but excluding the System Libraries of the Combined Work.
|
||||
|
||||
1. Exception to Section 3 of the GNU GPL.
|
||||
|
||||
You may convey a covered work under sections 3 and 4 of this License
|
||||
without being bound by section 3 of the GNU GPL.
|
||||
|
||||
2. Conveying Modified Versions.
|
||||
|
||||
If you modify a copy of the Library, and, in your modifications, a
|
||||
facility refers to a function or data to be supplied by an Application
|
||||
that uses the facility (other than as an argument passed when the
|
||||
facility is invoked), then you may convey a copy of the modified
|
||||
version:
|
||||
|
||||
a) under this License, provided that you make a good faith effort to
|
||||
ensure that, in the event an Application does not supply the
|
||||
function or data, the facility still operates, and performs
|
||||
whatever part of its purpose remains meaningful, or
|
||||
|
||||
b) under the GNU GPL, with none of the additional permissions of
|
||||
this License applicable to that copy.
|
||||
|
||||
3. Object Code Incorporating Material from Library Header Files.
|
||||
|
||||
The object code form of an Application may incorporate material from
|
||||
a header file that is part of the Library. You may convey such object
|
||||
code under terms of your choice, provided that, if the incorporated
|
||||
material is not limited to numerical parameters, data structure
|
||||
layouts and accessors, or small macros, inline functions and templates
|
||||
(ten or fewer lines in length), you do both of the following:
|
||||
|
||||
a) Give prominent notice with each copy of the object code that the
|
||||
Library is used in it and that the Library and its use are
|
||||
covered by this License.
|
||||
|
||||
b) Accompany the object code with a copy of the GNU GPL and this license
|
||||
document.
|
||||
|
||||
4. Combined Works.
|
||||
|
||||
You may convey a Combined Work under terms of your choice that,
|
||||
taken together, effectively do not restrict modification of the
|
||||
portions of the Library contained in the Combined Work and reverse
|
||||
engineering for debugging such modifications, if you also do each of
|
||||
the following:
|
||||
|
||||
a) Give prominent notice with each copy of the Combined Work that
|
||||
the Library is used in it and that the Library and its use are
|
||||
covered by this License.
|
||||
|
||||
b) Accompany the Combined Work with a copy of the GNU GPL and this license
|
||||
document.
|
||||
|
||||
c) For a Combined Work that displays copyright notices during
|
||||
execution, include the copyright notice for the Library among
|
||||
these notices, as well as a reference directing the user to the
|
||||
copies of the GNU GPL and this license document.
|
||||
|
||||
d) Do one of the following:
|
||||
|
||||
0) Convey the Minimal Corresponding Source under the terms of this
|
||||
License, and the Corresponding Application Code in a form
|
||||
suitable for, and under terms that permit, the user to
|
||||
recombine or relink the Application with a modified version of
|
||||
the Linked Version to produce a modified Combined Work, in the
|
||||
manner specified by section 6 of the GNU GPL for conveying
|
||||
Corresponding Source.
|
||||
|
||||
1) Use a suitable shared library mechanism for linking with the
|
||||
Library. A suitable mechanism is one that (a) uses at run time
|
||||
a copy of the Library already present on the user's computer
|
||||
system, and (b) will operate properly with a modified version
|
||||
of the Library that is interface-compatible with the Linked
|
||||
Version.
|
||||
|
||||
e) Provide Installation Information, but only if you would otherwise
|
||||
be required to provide such information under section 6 of the
|
||||
GNU GPL, and only to the extent that such information is
|
||||
necessary to install and execute a modified version of the
|
||||
Combined Work produced by recombining or relinking the
|
||||
Application with a modified version of the Linked Version. (If
|
||||
you use option 4d0, the Installation Information must accompany
|
||||
the Minimal Corresponding Source and Corresponding Application
|
||||
Code. If you use option 4d1, you must provide the Installation
|
||||
Information in the manner specified by section 6 of the GNU GPL
|
||||
for conveying Corresponding Source.)
|
||||
|
||||
5. Combined Libraries.
|
||||
|
||||
You may place library facilities that are a work based on the
|
||||
Library side by side in a single library together with other library
|
||||
facilities that are not Applications and are not covered by this
|
||||
License, and convey such a combined library under terms of your
|
||||
choice, if you do both of the following:
|
||||
|
||||
a) Accompany the combined library with a copy of the same work based
|
||||
on the Library, uncombined with any other library facilities,
|
||||
conveyed under the terms of this License.
|
||||
|
||||
b) Give prominent notice with the combined library that part of it
|
||||
is a work based on the Library, and explaining where to find the
|
||||
accompanying uncombined form of the same work.
|
||||
|
||||
6. Revised Versions of the GNU Lesser General Public License.
|
||||
|
||||
The Free Software Foundation may publish revised and/or new versions
|
||||
of the GNU Lesser General Public License from time to time. Such new
|
||||
versions will be similar in spirit to the present version, but may
|
||||
differ in detail to address new problems or concerns.
|
||||
|
||||
Each version is given a distinguishing version number. If the
|
||||
Library as you received it specifies that a certain numbered version
|
||||
of the GNU Lesser General Public License "or any later version"
|
||||
applies to it, you have the option of following the terms and
|
||||
conditions either of that published version or of any later version
|
||||
published by the Free Software Foundation. If the Library as you
|
||||
received it does not specify a version number of the GNU Lesser
|
||||
General Public License, you may choose any version of the GNU Lesser
|
||||
General Public License ever published by the Free Software Foundation.
|
||||
|
||||
If the Library as you received it specifies that a proxy can decide
|
||||
whether future versions of the GNU Lesser General Public License shall
|
||||
apply, that proxy's public statement of acceptance of any version is
|
||||
permanent authorization for you to choose that version for the
|
||||
Library.
|
||||
|
|
@ -0,0 +1,165 @@
|
|||
GNU LESSER GENERAL PUBLIC LICENSE
|
||||
Version 3, 29 June 2007
|
||||
|
||||
Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
|
||||
Everyone is permitted to copy and distribute verbatim copies
|
||||
of this license document, but changing it is not allowed.
|
||||
|
||||
|
||||
This version of the GNU Lesser General Public License incorporates
|
||||
the terms and conditions of version 3 of the GNU General Public
|
||||
License, supplemented by the additional permissions listed below.
|
||||
|
||||
0. Additional Definitions.
|
||||
|
||||
As used herein, "this License" refers to version 3 of the GNU Lesser
|
||||
General Public License, and the "GNU GPL" refers to version 3 of the GNU
|
||||
General Public License.
|
||||
|
||||
"The Library" refers to a covered work governed by this License,
|
||||
other than an Application or a Combined Work as defined below.
|
||||
|
||||
An "Application" is any work that makes use of an interface provided
|
||||
by the Library, but which is not otherwise based on the Library.
|
||||
Defining a subclass of a class defined by the Library is deemed a mode
|
||||
of using an interface provided by the Library.
|
||||
|
||||
A "Combined Work" is a work produced by combining or linking an
|
||||
Application with the Library. The particular version of the Library
|
||||
with which the Combined Work was made is also called the "Linked
|
||||
Version".
|
||||
|
||||
The "Minimal Corresponding Source" for a Combined Work means the
|
||||
Corresponding Source for the Combined Work, excluding any source code
|
||||
for portions of the Combined Work that, considered in isolation, are
|
||||
based on the Application, and not on the Linked Version.
|
||||
|
||||
The "Corresponding Application Code" for a Combined Work means the
|
||||
object code and/or source code for the Application, including any data
|
||||
and utility programs needed for reproducing the Combined Work from the
|
||||
Application, but excluding the System Libraries of the Combined Work.
|
||||
|
||||
1. Exception to Section 3 of the GNU GPL.
|
||||
|
||||
You may convey a covered work under sections 3 and 4 of this License
|
||||
without being bound by section 3 of the GNU GPL.
|
||||
|
||||
2. Conveying Modified Versions.
|
||||
|
||||
If you modify a copy of the Library, and, in your modifications, a
|
||||
facility refers to a function or data to be supplied by an Application
|
||||
that uses the facility (other than as an argument passed when the
|
||||
facility is invoked), then you may convey a copy of the modified
|
||||
version:
|
||||
|
||||
a) under this License, provided that you make a good faith effort to
|
||||
ensure that, in the event an Application does not supply the
|
||||
function or data, the facility still operates, and performs
|
||||
whatever part of its purpose remains meaningful, or
|
||||
|
||||
b) under the GNU GPL, with none of the additional permissions of
|
||||
this License applicable to that copy.
|
||||
|
||||
3. Object Code Incorporating Material from Library Header Files.
|
||||
|
||||
The object code form of an Application may incorporate material from
|
||||
a header file that is part of the Library. You may convey such object
|
||||
code under terms of your choice, provided that, if the incorporated
|
||||
material is not limited to numerical parameters, data structure
|
||||
layouts and accessors, or small macros, inline functions and templates
|
||||
(ten or fewer lines in length), you do both of the following:
|
||||
|
||||
a) Give prominent notice with each copy of the object code that the
|
||||
Library is used in it and that the Library and its use are
|
||||
covered by this License.
|
||||
|
||||
b) Accompany the object code with a copy of the GNU GPL and this license
|
||||
document.
|
||||
|
||||
4. Combined Works.
|
||||
|
||||
You may convey a Combined Work under terms of your choice that,
|
||||
taken together, effectively do not restrict modification of the
|
||||
portions of the Library contained in the Combined Work and reverse
|
||||
engineering for debugging such modifications, if you also do each of
|
||||
the following:
|
||||
|
||||
a) Give prominent notice with each copy of the Combined Work that
|
||||
the Library is used in it and that the Library and its use are
|
||||
covered by this License.
|
||||
|
||||
b) Accompany the Combined Work with a copy of the GNU GPL and this license
|
||||
document.
|
||||
|
||||
c) For a Combined Work that displays copyright notices during
|
||||
execution, include the copyright notice for the Library among
|
||||
these notices, as well as a reference directing the user to the
|
||||
copies of the GNU GPL and this license document.
|
||||
|
||||
d) Do one of the following:
|
||||
|
||||
0) Convey the Minimal Corresponding Source under the terms of this
|
||||
License, and the Corresponding Application Code in a form
|
||||
suitable for, and under terms that permit, the user to
|
||||
recombine or relink the Application with a modified version of
|
||||
the Linked Version to produce a modified Combined Work, in the
|
||||
manner specified by section 6 of the GNU GPL for conveying
|
||||
Corresponding Source.
|
||||
|
||||
1) Use a suitable shared library mechanism for linking with the
|
||||
Library. A suitable mechanism is one that (a) uses at run time
|
||||
a copy of the Library already present on the user's computer
|
||||
system, and (b) will operate properly with a modified version
|
||||
of the Library that is interface-compatible with the Linked
|
||||
Version.
|
||||
|
||||
e) Provide Installation Information, but only if you would otherwise
|
||||
be required to provide such information under section 6 of the
|
||||
GNU GPL, and only to the extent that such information is
|
||||
necessary to install and execute a modified version of the
|
||||
Combined Work produced by recombining or relinking the
|
||||
Application with a modified version of the Linked Version. (If
|
||||
you use option 4d0, the Installation Information must accompany
|
||||
the Minimal Corresponding Source and Corresponding Application
|
||||
Code. If you use option 4d1, you must provide the Installation
|
||||
Information in the manner specified by section 6 of the GNU GPL
|
||||
for conveying Corresponding Source.)
|
||||
|
||||
5. Combined Libraries.
|
||||
|
||||
You may place library facilities that are a work based on the
|
||||
Library side by side in a single library together with other library
|
||||
facilities that are not Applications and are not covered by this
|
||||
License, and convey such a combined library under terms of your
|
||||
choice, if you do both of the following:
|
||||
|
||||
a) Accompany the combined library with a copy of the same work based
|
||||
on the Library, uncombined with any other library facilities,
|
||||
conveyed under the terms of this License.
|
||||
|
||||
b) Give prominent notice with the combined library that part of it
|
||||
is a work based on the Library, and explaining where to find the
|
||||
accompanying uncombined form of the same work.
|
||||
|
||||
6. Revised Versions of the GNU Lesser General Public License.
|
||||
|
||||
The Free Software Foundation may publish revised and/or new versions
|
||||
of the GNU Lesser General Public License from time to time. Such new
|
||||
versions will be similar in spirit to the present version, but may
|
||||
differ in detail to address new problems or concerns.
|
||||
|
||||
Each version is given a distinguishing version number. If the
|
||||
Library as you received it specifies that a certain numbered version
|
||||
of the GNU Lesser General Public License "or any later version"
|
||||
applies to it, you have the option of following the terms and
|
||||
conditions either of that published version or of any later version
|
||||
published by the Free Software Foundation. If the Library as you
|
||||
received it does not specify a version number of the GNU Lesser
|
||||
General Public License, you may choose any version of the GNU Lesser
|
||||
General Public License ever published by the Free Software Foundation.
|
||||
|
||||
If the Library as you received it specifies that a proxy can decide
|
||||
whether future versions of the GNU Lesser General Public License shall
|
||||
apply, that proxy's public statement of acceptance of any version is
|
||||
permanent authorization for you to choose that version for the
|
||||
Library.
|
||||
|
|
@ -0,0 +1,96 @@
|
|||
#
|
||||
# Makefile:
|
||||
# wiringPi - Wiring Compatable library for the Raspberry Pi
|
||||
# https://projects.drogon.net/wiring-pi
|
||||
#
|
||||
# Copyright (c) 2012 Gordon Henderson
|
||||
#################################################################################
|
||||
# This file is part of wiringPi:
|
||||
# Wiring Compatable library for the Raspberry Pi
|
||||
#
|
||||
# wiringPi is free software: you can redistribute it and/or modify
|
||||
# it under the terms of the GNU Lesser General Public License as published by
|
||||
# the Free Software Foundation, either version 3 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# wiringPi is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU Lesser General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU Lesser General Public License
|
||||
# along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
|
||||
#################################################################################
|
||||
|
||||
|
||||
#DEBUG = -g -O0
|
||||
DEBUG = -O3
|
||||
CC = gcc
|
||||
INCLUDE = -I/usr/local/include
|
||||
CFLAGS = $(DEBUG) -Wall $(INCLUDE) -Winline -pipe
|
||||
|
||||
LDFLAGS = -L/usr/local/lib
|
||||
LIBS = -lwiringPi
|
||||
|
||||
# Should not alter anything below this line
|
||||
###############################################################################
|
||||
|
||||
SRC = test1.c test2.c speed.c lcd.c wfi.c piface.c gertboard.c nes.c delayTest.c
|
||||
|
||||
OBJ = test1.o test2.o speed.o lcd.o wfi.o piface.o gertboard.o nes.o delayTest.o
|
||||
|
||||
all: test1 test2 speed lcd wfi piface gertboard nes
|
||||
|
||||
test1: test1.o
|
||||
@echo [link]
|
||||
$(CC) -o $@ test1.o $(LDFLAGS) $(LIBS)
|
||||
|
||||
test2: test2.o
|
||||
@echo [link]
|
||||
$(CC) -o $@ test2.o $(LDFLAGS) $(LIBS)
|
||||
|
||||
speed: speed.o
|
||||
@echo [link]
|
||||
$(CC) -o $@ speed.o $(LDFLAGS) $(LIBS)
|
||||
|
||||
lcd: lcd.o
|
||||
@echo [link]
|
||||
$(CC) -o $@ lcd.o $(LDFLAGS) $(LIBS)
|
||||
|
||||
wfi: wfi.o
|
||||
@echo [link]
|
||||
$(CC) -o $@ wfi.o $(LDFLAGS) $(LIBS) -lpthread
|
||||
|
||||
piface: piface.o
|
||||
@echo [link]
|
||||
$(CC) -o $@ piface.o $(LDFLAGS) $(LIBS) -lpthread
|
||||
|
||||
gertboard: gertboard.o
|
||||
@echo [link]
|
||||
$(CC) -o $@ gertboard.o $(LDFLAGS) $(LIBS) -lm
|
||||
|
||||
nes: nes.o
|
||||
@echo [link]
|
||||
$(CC) -o $@ nes.o $(LDFLAGS) $(LIBS) -lm
|
||||
|
||||
|
||||
delayTest: delayTest.o
|
||||
@echo [link]
|
||||
$(CC) -o $@ delayTest.o $(LDFLAGS) $(LIBS)
|
||||
|
||||
|
||||
.c.o:
|
||||
@echo [CC] $<
|
||||
@$(CC) -c $(CFLAGS) $< -o $@
|
||||
|
||||
clean:
|
||||
rm -f $(OBJ) *~ core tags test1 test2 speed lcd wfi piface gertboard nes delayTest
|
||||
|
||||
tags: $(SRC)
|
||||
@echo [ctags]
|
||||
@ctags $(SRC)
|
||||
|
||||
depend:
|
||||
makedepend -Y $(SRC)
|
||||
|
||||
# DO NOT DELETE
|
||||
|
|
@ -0,0 +1,68 @@
|
|||
|
||||
#include <stdio.h>
|
||||
#include <unistd.h>
|
||||
#include <wiringPi.h>
|
||||
|
||||
#include <time.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/time.h>
|
||||
|
||||
#define CYCLES 1000
|
||||
#define DELAY 99
|
||||
|
||||
int main()
|
||||
{
|
||||
int x ;
|
||||
struct timeval t1, t2 ;
|
||||
long long t ;
|
||||
unsigned int max, min ;
|
||||
|
||||
unsigned int values [CYCLES] ;
|
||||
|
||||
max = 0 ;
|
||||
min = 1000000 ;
|
||||
|
||||
if (wiringPiSetup () == -1)
|
||||
return 1 ;
|
||||
|
||||
piHiPri (10) ;
|
||||
sleep (1) ;
|
||||
|
||||
// Baseline test
|
||||
|
||||
gettimeofday (&t1, NULL) ;
|
||||
gettimeofday (&t2, NULL) ;
|
||||
|
||||
t = t2.tv_usec - t1.tv_usec ;
|
||||
printf ("Baseline test: %lld\n", t);
|
||||
|
||||
for (x = 0 ; x < CYCLES ; ++x)
|
||||
{
|
||||
gettimeofday (&t1, NULL) ;
|
||||
delayMicroseconds (DELAY) ;
|
||||
gettimeofday (&t2, NULL) ;
|
||||
|
||||
t = t2.tv_usec - t1.tv_usec ;
|
||||
if (t > max) max = t ;
|
||||
if (t < min) min = t ;
|
||||
values [x] = t ;
|
||||
}
|
||||
|
||||
printf ("Done: Max: %d, min: %d\n", max, min) ;
|
||||
|
||||
for (x = 0 ; x < CYCLES ; ++x)
|
||||
{
|
||||
printf ("%4d", values [x]) ;
|
||||
if (values [x] > DELAY)
|
||||
printf (".") ;
|
||||
else if (values [x] < DELAY)
|
||||
printf ("-") ;
|
||||
else
|
||||
printf (" ") ;
|
||||
if (((x + 1) % 20) == 0)
|
||||
printf ("\n") ;
|
||||
}
|
||||
printf ("\n") ;
|
||||
|
||||
return 0 ;
|
||||
}
|
||||
|
|
@ -0,0 +1,47 @@
|
|||
|
||||
/*
|
||||
* gertboard.c:
|
||||
* Simple test for the SPI bus on the Gertboard
|
||||
*
|
||||
* Hardware setup:
|
||||
* D/A port 0 jumpered to A/D port 0.
|
||||
*
|
||||
* We output a sine wave on D/A port 0 and sample A/D port 0. We then
|
||||
* copy this value to D/A port 1 and use a 'scope on both D/A ports
|
||||
* to check all's well.
|
||||
*
|
||||
*/
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdint.h>
|
||||
//#include <stdlib.h>
|
||||
#include <math.h>
|
||||
|
||||
#include <wiringPi.h>
|
||||
#include <gertboard.h>
|
||||
|
||||
int main (void)
|
||||
{
|
||||
int angle ;
|
||||
int h1 ;
|
||||
uint32_t x1 ;
|
||||
|
||||
printf ("Raspberry Pi Gertboard SPI test program\n") ;
|
||||
|
||||
if (gertboardSPISetup () == -1)
|
||||
return 1 ;
|
||||
|
||||
for (;;)
|
||||
{
|
||||
for (angle = 0 ; angle < 360 ; ++angle)
|
||||
{
|
||||
h1 = (int)rint (sin ((double)angle * M_PI / 180.0) * 127.0 + 128.0) ;
|
||||
gertboardAnalogWrite (0, h1) ;
|
||||
|
||||
x1 = gertboardAnalogRead (0) ;
|
||||
gertboardAnalogWrite (1, x1 >> 2) ; // 10-bit A/D, 8-bit D/A
|
||||
}
|
||||
}
|
||||
|
||||
return 0 ;
|
||||
}
|
||||
Binary file not shown.
|
After Width: | Height: | Size: 4.7 KiB |
|
|
@ -0,0 +1,129 @@
|
|||
/*
|
||||
* lcd.c:
|
||||
* Text-based LCD driver.
|
||||
* This is designed to drive the parallel interface LCD drivers
|
||||
* based in the Hitachi HD44780U controller and compatables.
|
||||
*
|
||||
* Copyright (c) 2012 Gordon Henderson.
|
||||
***********************************************************************
|
||||
* This file is part of wiringPi:
|
||||
* https://projects.drogon.net/raspberry-pi/wiringpi/
|
||||
*
|
||||
* wiringPi is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License as published by
|
||||
* the Free Software Foundation, either version 3 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* wiringPi is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public License
|
||||
* along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
|
||||
***********************************************************************
|
||||
*/
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <stdint.h>
|
||||
|
||||
#include <unistd.h>
|
||||
#include <string.h>
|
||||
#include <time.h>
|
||||
|
||||
#include <wiringPi.h>
|
||||
#include <lcd.h>
|
||||
|
||||
int main (void)
|
||||
{
|
||||
int i, j ;
|
||||
int fd1, fd2 ;
|
||||
|
||||
char message1 [256] ;
|
||||
char message2 [256] ;
|
||||
char buf1 [30] ;
|
||||
char buf2 [30] ;
|
||||
|
||||
struct tm *t ;
|
||||
time_t tim ;
|
||||
|
||||
printf ("Raspberry Pi LCD test program\n") ;
|
||||
|
||||
if (wiringPiSetup () == -1)
|
||||
exit (1) ;
|
||||
|
||||
fd1 = lcdInit (4, 20, 4, 8, 9, 4,5,6,7,0,0,0,0) ;
|
||||
fd2 = lcdInit (2, 16, 4, 8, 10, 4,5,6,7,0,0,0,0) ;
|
||||
|
||||
//fd1 = lcdInit (4, 20, 8, 8, 9, 0,1,2,3,4,5,6,7) ;
|
||||
//fd2 = lcdInit (2, 16, 8, 8, 10, 0,1,2,3,4,5,6,7) ;
|
||||
|
||||
if (fd1 == -1)
|
||||
{
|
||||
printf ("lcdInit 1 failed\n") ;
|
||||
return 1 ;
|
||||
}
|
||||
|
||||
if (fd2 == -1)
|
||||
{
|
||||
printf ("lcdInit 2 failed\n") ;
|
||||
return 1 ;
|
||||
}
|
||||
|
||||
sleep (1) ;
|
||||
|
||||
lcdPosition (fd1, 0, 0) ; lcdPuts (fd1, " Gordon Henderson") ;
|
||||
lcdPosition (fd1, 0, 1) ; lcdPuts (fd1, " --------------") ;
|
||||
/*
|
||||
lcdPosition (fd1, 0, 2) ; lcdPuts (fd1, " 00:00:00") ;
|
||||
lcdPosition (fd1, 0, 3) ; lcdPuts (fd1, " DD:MM:YY") ;
|
||||
*/
|
||||
|
||||
lcdPosition (fd2, 0, 0) ; lcdPuts (fd2, "Gordon Henderson") ;
|
||||
lcdPosition (fd2, 0, 1) ; lcdPuts (fd2, "----------------") ;
|
||||
|
||||
sleep (2) ;
|
||||
|
||||
sprintf (message1, "%s", " http://projects.drogon.net/ ") ;
|
||||
sprintf (message2, "%s", " This is a long message to go into the smaller display just for a demonstration of what we can do. ") ;
|
||||
|
||||
for (;;)
|
||||
{
|
||||
i = 0 ;
|
||||
j = 0 ;
|
||||
for (;;)
|
||||
{
|
||||
strncpy (buf1, &message1 [i], 20) ;
|
||||
buf1 [20] = 0 ;
|
||||
lcdPosition (fd1, 0, 1) ;
|
||||
lcdPuts (fd1, buf1) ;
|
||||
++i ;
|
||||
if (i == strlen (message1) - 20)
|
||||
i = 0 ;
|
||||
|
||||
strncpy (buf2, &message2 [j], 16) ;
|
||||
buf2 [16] = 0 ;
|
||||
lcdPosition (fd2, 0, 1) ;
|
||||
lcdPuts (fd2, buf2) ;
|
||||
++j ;
|
||||
if (j == strlen (message2) - 16)
|
||||
j = 0 ;
|
||||
|
||||
tim = time (NULL) ;
|
||||
t = localtime (&tim) ;
|
||||
|
||||
sprintf (buf1, "%02d:%02d:%02d", t->tm_hour, t->tm_min, t->tm_sec) ;
|
||||
lcdPosition (fd1, 5, 2) ;
|
||||
lcdPuts (fd1, buf1) ;
|
||||
|
||||
sprintf (buf1, "%02d/%02d/%02d", t->tm_mday, t->tm_mon + 1, t->tm_year+1900) ;
|
||||
lcdPosition (fd1, 4, 3) ;
|
||||
lcdPuts (fd1, buf1) ;
|
||||
|
||||
delay (250) ;
|
||||
}
|
||||
}
|
||||
|
||||
return 0 ;
|
||||
}
|
||||
|
|
@ -0,0 +1,44 @@
|
|||
|
||||
#include <stdio.h>
|
||||
#include <errno.h>
|
||||
#include <string.h>
|
||||
|
||||
#include <wiringPi.h>
|
||||
#include <piNes.h>
|
||||
|
||||
#define BLANK "| "
|
||||
|
||||
int main ()
|
||||
{
|
||||
int joystick ;
|
||||
unsigned int buttons ;
|
||||
|
||||
if (wiringPiSetup () == -1)
|
||||
{
|
||||
fprintf (stdout, "oops: %s\n", strerror (errno)) ;
|
||||
return 1 ;
|
||||
}
|
||||
|
||||
if ((joystick = setupNesJoystick (2, 1, 0)) == -1)
|
||||
{
|
||||
fprintf (stdout, "Unable to setup joystick\n") ;
|
||||
return 1 ;
|
||||
}
|
||||
|
||||
for (;;)
|
||||
{
|
||||
buttons = readNesJoystick (joystick) ;
|
||||
|
||||
if ((buttons & NES_UP) != 0) printf ("| UP " ) ; else printf (BLANK) ;
|
||||
if ((buttons & NES_DOWN) != 0) printf ("| DOWN " ) ; else printf (BLANK) ;
|
||||
if ((buttons & NES_LEFT) != 0) printf ("| LEFT " ) ; else printf (BLANK) ;
|
||||
if ((buttons & NES_RIGHT) != 0) printf ("|RIGHT " ) ; else printf (BLANK) ;
|
||||
if ((buttons & NES_SELECT) != 0) printf ("|SELECT" ) ; else printf (BLANK) ;
|
||||
if ((buttons & NES_START) != 0) printf ("|START " ) ; else printf (BLANK) ;
|
||||
if ((buttons & NES_A) != 0) printf ("| A " ) ; else printf (BLANK) ;
|
||||
if ((buttons & NES_B) != 0) printf ("| B " ) ; else printf (BLANK) ;
|
||||
printf ("|\n") ;
|
||||
}
|
||||
|
||||
return 0 ;
|
||||
}
|
||||
|
|
@ -0,0 +1,53 @@
|
|||
|
||||
/*
|
||||
* piface.c:
|
||||
* Simple test for the PiFace
|
||||
*
|
||||
* Read the buttons and output the same to the LEDs
|
||||
*/
|
||||
|
||||
#include <wiringPi.h>
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <stdint.h>
|
||||
|
||||
int outputs [4] = { 0,0,0,0 } ;
|
||||
|
||||
void scanButton (int button)
|
||||
{
|
||||
if (digitalRead (button) == LOW)
|
||||
{
|
||||
outputs [button] ^= 1 ;
|
||||
digitalWrite (button, outputs [button]) ;
|
||||
}
|
||||
|
||||
while (digitalRead (button) == LOW)
|
||||
delay (1) ;
|
||||
}
|
||||
|
||||
|
||||
int main (void)
|
||||
{
|
||||
int pin, button ;
|
||||
|
||||
printf ("Raspberry Pi wiringPiFace test program\n") ;
|
||||
|
||||
if (wiringPiSetupPiFace () == -1)
|
||||
exit (1) ;
|
||||
|
||||
// Enable internal pull-ups
|
||||
|
||||
for (pin = 0 ; pin < 8 ; ++pin)
|
||||
pullUpDnControl (pin, PUD_UP) ;
|
||||
|
||||
|
||||
for (;;)
|
||||
{
|
||||
for (button = 0 ; button < 4 ; ++button)
|
||||
scanButton (button) ;
|
||||
delay (1) ;
|
||||
}
|
||||
|
||||
return 0 ;
|
||||
}
|
||||
|
|
@ -0,0 +1,105 @@
|
|||
|
||||
/*
|
||||
* speed.c:
|
||||
* Simple program to measure the speed of the various GPIO
|
||||
* access mechanisms.
|
||||
*/
|
||||
|
||||
#include <wiringPi.h>
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <stdint.h>
|
||||
|
||||
#define FAST_COUNT 10000000
|
||||
#define SLOW_COUNT 1000000
|
||||
|
||||
|
||||
int main (void)
|
||||
{
|
||||
int i ;
|
||||
uint32_t start, end, count, sum, perSec ;
|
||||
|
||||
printf ("Raspberry Pi wiringPi speed test program\n") ;
|
||||
|
||||
// Start the standard way
|
||||
|
||||
if (wiringPiSetup () == -1)
|
||||
exit (1) ;
|
||||
|
||||
printf ("Native wiringPi method: (%8d iterations)\n", FAST_COUNT) ;
|
||||
|
||||
pinMode (0, OUTPUT) ;
|
||||
|
||||
sum = 0 ;
|
||||
for (i = 0 ; i < 3 ; ++i)
|
||||
{
|
||||
printf (" Pass: %d: ", i) ;
|
||||
fflush (stdout) ;
|
||||
|
||||
start = millis () ;
|
||||
for (count = 0 ; count < FAST_COUNT ; ++count)
|
||||
digitalWrite (0, 1) ;
|
||||
end = millis () ;
|
||||
printf (" %8dmS\n", end - start) ;
|
||||
sum += (end - start) ;
|
||||
}
|
||||
digitalWrite (0, 0) ;
|
||||
printf (" Average: %8dmS", sum / 3) ;
|
||||
perSec = (int)(double)FAST_COUNT / (double)((double)sum / 3.0) * 1000.0 ;
|
||||
printf (": %6d/sec\n", perSec) ;
|
||||
|
||||
|
||||
printf ("Native GPIO method: (%8d iterations)\n", FAST_COUNT) ;
|
||||
|
||||
if (wiringPiSetupGpio () == -1)
|
||||
exit (1) ;
|
||||
|
||||
pinMode (17, OUTPUT) ;
|
||||
|
||||
sum = 0 ;
|
||||
for (i = 0 ; i < 3 ; ++i)
|
||||
{
|
||||
printf (" Pass: %d: ", i) ;
|
||||
fflush (stdout) ;
|
||||
|
||||
start = millis () ;
|
||||
for (count = 0 ; count < 10000000 ; ++count)
|
||||
digitalWrite (17, 1) ;
|
||||
end = millis () ;
|
||||
printf (" %8dmS\n", end - start) ;
|
||||
sum += (end - start) ;
|
||||
}
|
||||
digitalWrite (17, 0) ;
|
||||
printf (" Average: %8dmS", sum / 3) ;
|
||||
perSec = (int)(double)FAST_COUNT / (double)((double)sum / 3.0) * 1000.0 ;
|
||||
printf (": %6d/sec\n", perSec) ;
|
||||
|
||||
|
||||
// Switch to SYS mode:
|
||||
|
||||
if (wiringPiSetupSys () == -1)
|
||||
exit (1) ;
|
||||
|
||||
printf ("/sys/class/gpio method: (%8d iterations)\n", SLOW_COUNT) ;
|
||||
|
||||
sum = 0 ;
|
||||
for (i = 0 ; i < 3 ; ++i)
|
||||
{
|
||||
printf (" Pass: %d: ", i) ;
|
||||
fflush (stdout) ;
|
||||
|
||||
start = millis () ;
|
||||
for (count = 0 ; count < SLOW_COUNT ; ++count)
|
||||
digitalWrite (17, 1) ;
|
||||
end = millis () ;
|
||||
printf (" %8dmS\n", end - start) ;
|
||||
sum += (end - start) ;
|
||||
}
|
||||
digitalWrite (17, 0) ;
|
||||
printf (" Average: %8dmS", sum / 3) ;
|
||||
perSec = (int)(double)SLOW_COUNT / (double)((double)sum / 3.0) * 1000.0 ;
|
||||
printf (": %6d/sec\n", perSec) ;
|
||||
|
||||
return 0 ;
|
||||
}
|
||||
|
|
@ -0,0 +1,91 @@
|
|||
|
||||
/*
|
||||
* test1.c:
|
||||
* Simple test program to test the wiringPi functions
|
||||
*/
|
||||
|
||||
#include <wiringPi.h>
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <stdint.h>
|
||||
|
||||
|
||||
// Simple sequencer data
|
||||
// Triplets of LED, On/Off and delay
|
||||
|
||||
uint8_t data [] =
|
||||
{
|
||||
0, 1, 1,
|
||||
1, 1, 1,
|
||||
0, 0, 0, 2, 1, 1,
|
||||
1, 0, 0, 3, 1, 1,
|
||||
2, 0, 0, 4, 1, 1,
|
||||
3, 0, 0, 5, 1, 1,
|
||||
4, 0, 0, 6, 1, 1,
|
||||
5, 0, 0, 7, 1, 1,
|
||||
6, 0, 1,
|
||||
7, 0, 1,
|
||||
|
||||
0, 0, 1, // Extra delay
|
||||
|
||||
// Back again
|
||||
|
||||
7, 1, 1,
|
||||
6, 1, 1,
|
||||
7, 0, 0, 5, 1, 1,
|
||||
6, 0, 0, 4, 1, 1,
|
||||
5, 0, 0, 3, 1, 1,
|
||||
4, 0, 0, 2, 1, 1,
|
||||
3, 0, 0, 1, 1, 1,
|
||||
2, 0, 0, 0, 1, 1,
|
||||
1, 0, 1,
|
||||
0, 0, 1,
|
||||
|
||||
0, 0, 1, // Extra delay
|
||||
|
||||
9, 9, 9, // End marker
|
||||
|
||||
} ;
|
||||
|
||||
|
||||
int main (void)
|
||||
{
|
||||
int pin ;
|
||||
int dataPtr ;
|
||||
int l, s, d ;
|
||||
|
||||
printf ("Raspberry Pi wiringPi test program\n") ;
|
||||
|
||||
if (wiringPiSetup () == -1)
|
||||
exit (1) ;
|
||||
|
||||
for (pin = 0 ; pin < 8 ; ++pin)
|
||||
pinMode (pin, OUTPUT) ;
|
||||
|
||||
pinMode (8, INPUT) ; // Pin 8 SDA0 - Has on-board 2k2 pull-up resistor
|
||||
|
||||
dataPtr = 0 ;
|
||||
|
||||
for (;;)
|
||||
{
|
||||
l = data [dataPtr++] ; // LED
|
||||
s = data [dataPtr++] ; // State
|
||||
d = data [dataPtr++] ; // Duration (10ths)
|
||||
|
||||
if ((l + s + d) == 27)
|
||||
{
|
||||
dataPtr = 0 ;
|
||||
continue ;
|
||||
}
|
||||
|
||||
digitalWrite (l, s) ;
|
||||
|
||||
if (digitalRead (8) == 0) // Pressed as our switch shorts to ground
|
||||
delay (d * 10) ; // Faster!
|
||||
else
|
||||
delay (d * 100) ;
|
||||
}
|
||||
|
||||
return 0 ;
|
||||
}
|
||||
|
|
@ -0,0 +1,41 @@
|
|||
|
||||
/*
|
||||
* test2.c:
|
||||
* Simple test program to test the wiringPi functions
|
||||
* PWM test
|
||||
*/
|
||||
|
||||
#include <wiringPi.h>
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <stdint.h>
|
||||
|
||||
int main (void)
|
||||
{
|
||||
int bright ;
|
||||
|
||||
printf ("Raspberry Pi wiringPi PWM test program\n") ;
|
||||
|
||||
if (wiringPiSetup () == -1)
|
||||
exit (1) ;
|
||||
|
||||
pinMode (1, PWM_OUTPUT) ;
|
||||
|
||||
for (;;)
|
||||
{
|
||||
for (bright = 0 ; bright < 1024 ; ++bright)
|
||||
{
|
||||
pwmWrite (1, bright) ;
|
||||
delay (1) ;
|
||||
}
|
||||
|
||||
for (bright = 1023 ; bright >= 0 ; --bright)
|
||||
{
|
||||
pwmWrite (1, bright) ;
|
||||
delay (1) ;
|
||||
}
|
||||
}
|
||||
|
||||
return 0 ;
|
||||
}
|
||||
|
|
@ -0,0 +1,158 @@
|
|||
/*
|
||||
* wfi.c:
|
||||
* Wait for Interrupt test program
|
||||
*
|
||||
* Copyright (c) 2012 Gordon Henderson.
|
||||
***********************************************************************
|
||||
* This file is part of wiringPi:
|
||||
* https://projects.drogon.net/raspberry-pi/wiringpi/
|
||||
*
|
||||
* wiringPi is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License as published by
|
||||
* the Free Software Foundation, either version 3 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* wiringPi is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public License
|
||||
* along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
|
||||
***********************************************************************
|
||||
*/
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <wiringPi.h>
|
||||
|
||||
// A 'key' which we can lock and unlock - values are 0 through 3
|
||||
// This is interpreted internally as a pthread_mutex by wiringPi
|
||||
// which is hiding some of that to make life simple.
|
||||
|
||||
#define COUNT_KEY 0
|
||||
|
||||
// What BCM_GPIO input are we using?
|
||||
// GPIO 0 is one of the I2C pins with an on-board pull-up
|
||||
|
||||
#define BUTTON_PIN 0
|
||||
|
||||
// Debounce time in mS
|
||||
|
||||
#define DEBOUNCE_TIME 100
|
||||
|
||||
|
||||
// globalCounter:
|
||||
// Global variable to count interrupts
|
||||
// Should be declared volatile to make sure the compiler doesn't cache it.
|
||||
|
||||
static volatile int globalCounter = 0 ;
|
||||
|
||||
|
||||
/*
|
||||
* waitForIt:
|
||||
* This is a thread created using the wiringPi simplified threading
|
||||
* mechanism. It will wait on an interrupt on the button and increment
|
||||
* a counter.
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
PI_THREAD (waitForIt)
|
||||
{
|
||||
int state = 0 ;
|
||||
int debounceTime = 0 ;
|
||||
|
||||
(void)piHiPri (10) ; // Set this thread to be high priority
|
||||
digitalWrite (18, 1) ;
|
||||
|
||||
for (;;)
|
||||
{
|
||||
if (waitForInterrupt (BUTTON_PIN, -1) > 0) // Got it
|
||||
{
|
||||
|
||||
// Bouncing?
|
||||
|
||||
if (millis () < debounceTime)
|
||||
{
|
||||
debounceTime = millis () + DEBOUNCE_TIME ;
|
||||
continue ;
|
||||
}
|
||||
|
||||
// We have a valid one
|
||||
|
||||
digitalWrite (17, state) ;
|
||||
state ^= 1 ;
|
||||
|
||||
piLock (COUNT_KEY) ;
|
||||
++globalCounter ;
|
||||
piUnlock (COUNT_KEY) ;
|
||||
|
||||
// Wait for key to be released
|
||||
|
||||
while (digitalRead (0) == LOW)
|
||||
delay (1) ;
|
||||
|
||||
debounceTime = millis () + DEBOUNCE_TIME ;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* setup:
|
||||
* Demo a crude but effective way to initialise the hardware
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void setup (void)
|
||||
{
|
||||
|
||||
// Use the gpio program to initialise the hardware
|
||||
// (This is the crude, but effective bit)
|
||||
|
||||
system ("gpio edge 0 falling") ;
|
||||
system ("gpio export 17 out") ;
|
||||
system ("gpio export 18 out") ;
|
||||
|
||||
// Setup wiringPi
|
||||
|
||||
wiringPiSetupSys () ;
|
||||
|
||||
// Fire off our interrupt handler
|
||||
|
||||
piThreadCreate (waitForIt) ;
|
||||
|
||||
digitalWrite (17, 0) ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* main
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
int main (void)
|
||||
{
|
||||
int lastCounter = 0 ;
|
||||
int myCounter = 0 ;
|
||||
|
||||
setup () ;
|
||||
|
||||
for (;;)
|
||||
{
|
||||
printf ("Waiting ... ") ; fflush (stdout) ;
|
||||
|
||||
while (myCounter == lastCounter)
|
||||
{
|
||||
piLock (COUNT_KEY) ;
|
||||
myCounter = globalCounter ;
|
||||
piUnlock (COUNT_KEY) ;
|
||||
delay (5000) ;
|
||||
}
|
||||
|
||||
printf (" Done. myCounter: %5d\n", myCounter) ;
|
||||
lastCounter = myCounter ;
|
||||
}
|
||||
|
||||
return 0 ;
|
||||
}
|
||||
|
|
@ -0,0 +1,165 @@
|
|||
GNU LESSER GENERAL PUBLIC LICENSE
|
||||
Version 3, 29 June 2007
|
||||
|
||||
Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
|
||||
Everyone is permitted to copy and distribute verbatim copies
|
||||
of this license document, but changing it is not allowed.
|
||||
|
||||
|
||||
This version of the GNU Lesser General Public License incorporates
|
||||
the terms and conditions of version 3 of the GNU General Public
|
||||
License, supplemented by the additional permissions listed below.
|
||||
|
||||
0. Additional Definitions.
|
||||
|
||||
As used herein, "this License" refers to version 3 of the GNU Lesser
|
||||
General Public License, and the "GNU GPL" refers to version 3 of the GNU
|
||||
General Public License.
|
||||
|
||||
"The Library" refers to a covered work governed by this License,
|
||||
other than an Application or a Combined Work as defined below.
|
||||
|
||||
An "Application" is any work that makes use of an interface provided
|
||||
by the Library, but which is not otherwise based on the Library.
|
||||
Defining a subclass of a class defined by the Library is deemed a mode
|
||||
of using an interface provided by the Library.
|
||||
|
||||
A "Combined Work" is a work produced by combining or linking an
|
||||
Application with the Library. The particular version of the Library
|
||||
with which the Combined Work was made is also called the "Linked
|
||||
Version".
|
||||
|
||||
The "Minimal Corresponding Source" for a Combined Work means the
|
||||
Corresponding Source for the Combined Work, excluding any source code
|
||||
for portions of the Combined Work that, considered in isolation, are
|
||||
based on the Application, and not on the Linked Version.
|
||||
|
||||
The "Corresponding Application Code" for a Combined Work means the
|
||||
object code and/or source code for the Application, including any data
|
||||
and utility programs needed for reproducing the Combined Work from the
|
||||
Application, but excluding the System Libraries of the Combined Work.
|
||||
|
||||
1. Exception to Section 3 of the GNU GPL.
|
||||
|
||||
You may convey a covered work under sections 3 and 4 of this License
|
||||
without being bound by section 3 of the GNU GPL.
|
||||
|
||||
2. Conveying Modified Versions.
|
||||
|
||||
If you modify a copy of the Library, and, in your modifications, a
|
||||
facility refers to a function or data to be supplied by an Application
|
||||
that uses the facility (other than as an argument passed when the
|
||||
facility is invoked), then you may convey a copy of the modified
|
||||
version:
|
||||
|
||||
a) under this License, provided that you make a good faith effort to
|
||||
ensure that, in the event an Application does not supply the
|
||||
function or data, the facility still operates, and performs
|
||||
whatever part of its purpose remains meaningful, or
|
||||
|
||||
b) under the GNU GPL, with none of the additional permissions of
|
||||
this License applicable to that copy.
|
||||
|
||||
3. Object Code Incorporating Material from Library Header Files.
|
||||
|
||||
The object code form of an Application may incorporate material from
|
||||
a header file that is part of the Library. You may convey such object
|
||||
code under terms of your choice, provided that, if the incorporated
|
||||
material is not limited to numerical parameters, data structure
|
||||
layouts and accessors, or small macros, inline functions and templates
|
||||
(ten or fewer lines in length), you do both of the following:
|
||||
|
||||
a) Give prominent notice with each copy of the object code that the
|
||||
Library is used in it and that the Library and its use are
|
||||
covered by this License.
|
||||
|
||||
b) Accompany the object code with a copy of the GNU GPL and this license
|
||||
document.
|
||||
|
||||
4. Combined Works.
|
||||
|
||||
You may convey a Combined Work under terms of your choice that,
|
||||
taken together, effectively do not restrict modification of the
|
||||
portions of the Library contained in the Combined Work and reverse
|
||||
engineering for debugging such modifications, if you also do each of
|
||||
the following:
|
||||
|
||||
a) Give prominent notice with each copy of the Combined Work that
|
||||
the Library is used in it and that the Library and its use are
|
||||
covered by this License.
|
||||
|
||||
b) Accompany the Combined Work with a copy of the GNU GPL and this license
|
||||
document.
|
||||
|
||||
c) For a Combined Work that displays copyright notices during
|
||||
execution, include the copyright notice for the Library among
|
||||
these notices, as well as a reference directing the user to the
|
||||
copies of the GNU GPL and this license document.
|
||||
|
||||
d) Do one of the following:
|
||||
|
||||
0) Convey the Minimal Corresponding Source under the terms of this
|
||||
License, and the Corresponding Application Code in a form
|
||||
suitable for, and under terms that permit, the user to
|
||||
recombine or relink the Application with a modified version of
|
||||
the Linked Version to produce a modified Combined Work, in the
|
||||
manner specified by section 6 of the GNU GPL for conveying
|
||||
Corresponding Source.
|
||||
|
||||
1) Use a suitable shared library mechanism for linking with the
|
||||
Library. A suitable mechanism is one that (a) uses at run time
|
||||
a copy of the Library already present on the user's computer
|
||||
system, and (b) will operate properly with a modified version
|
||||
of the Library that is interface-compatible with the Linked
|
||||
Version.
|
||||
|
||||
e) Provide Installation Information, but only if you would otherwise
|
||||
be required to provide such information under section 6 of the
|
||||
GNU GPL, and only to the extent that such information is
|
||||
necessary to install and execute a modified version of the
|
||||
Combined Work produced by recombining or relinking the
|
||||
Application with a modified version of the Linked Version. (If
|
||||
you use option 4d0, the Installation Information must accompany
|
||||
the Minimal Corresponding Source and Corresponding Application
|
||||
Code. If you use option 4d1, you must provide the Installation
|
||||
Information in the manner specified by section 6 of the GNU GPL
|
||||
for conveying Corresponding Source.)
|
||||
|
||||
5. Combined Libraries.
|
||||
|
||||
You may place library facilities that are a work based on the
|
||||
Library side by side in a single library together with other library
|
||||
facilities that are not Applications and are not covered by this
|
||||
License, and convey such a combined library under terms of your
|
||||
choice, if you do both of the following:
|
||||
|
||||
a) Accompany the combined library with a copy of the same work based
|
||||
on the Library, uncombined with any other library facilities,
|
||||
conveyed under the terms of this License.
|
||||
|
||||
b) Give prominent notice with the combined library that part of it
|
||||
is a work based on the Library, and explaining where to find the
|
||||
accompanying uncombined form of the same work.
|
||||
|
||||
6. Revised Versions of the GNU Lesser General Public License.
|
||||
|
||||
The Free Software Foundation may publish revised and/or new versions
|
||||
of the GNU Lesser General Public License from time to time. Such new
|
||||
versions will be similar in spirit to the present version, but may
|
||||
differ in detail to address new problems or concerns.
|
||||
|
||||
Each version is given a distinguishing version number. If the
|
||||
Library as you received it specifies that a certain numbered version
|
||||
of the GNU Lesser General Public License "or any later version"
|
||||
applies to it, you have the option of following the terms and
|
||||
conditions either of that published version or of any later version
|
||||
published by the Free Software Foundation. If the Library as you
|
||||
received it does not specify a version number of the GNU Lesser
|
||||
General Public License, you may choose any version of the GNU Lesser
|
||||
General Public License ever published by the Free Software Foundation.
|
||||
|
||||
If the Library as you received it specifies that a proxy can decide
|
||||
whether future versions of the GNU Lesser General Public License shall
|
||||
apply, that proxy's public statement of acceptance of any version is
|
||||
permanent authorization for you to choose that version for the
|
||||
Library.
|
||||
|
|
@ -0,0 +1,73 @@
|
|||
#
|
||||
# Makefile:
|
||||
# wiringPi - Wiring Compatable library for the Raspberry Pi
|
||||
# https://projects.drogon.net/wiring-pi
|
||||
#
|
||||
# Copyright (c) 2012 Gordon Henderson
|
||||
#################################################################################
|
||||
# This file is part of wiringPi:
|
||||
# Wiring Compatable library for the Raspberry Pi
|
||||
#
|
||||
# wiringPi is free software: you can redistribute it and/or modify
|
||||
# it under the terms of the GNU Lesser General Public License as published by
|
||||
# the Free Software Foundation, either version 3 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# wiringPi is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU Lesser General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU Lesser General Public License
|
||||
# along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
|
||||
#################################################################################
|
||||
|
||||
|
||||
#DEBUG = -g -O0
|
||||
DEBUG = -O3
|
||||
CC = gcc
|
||||
INCLUDE = -I/usr/local/include
|
||||
CFLAGS = $(DEBUG) -Wall $(INCLUDE) -Winline -pipe
|
||||
|
||||
LDFLAGS = -L/usr/local/lib
|
||||
LIBS = -lwiringPi
|
||||
|
||||
# Should not alter anything below this line
|
||||
###############################################################################
|
||||
|
||||
SRC = gpio.c
|
||||
|
||||
OBJ = gpio.o
|
||||
|
||||
all: gpio
|
||||
|
||||
gpio: gpio.o
|
||||
@echo [LD]
|
||||
@$(CC) -o $@ gpio.o $(LDFLAGS) $(LIBS)
|
||||
|
||||
.c.o:
|
||||
@echo [CC] $<
|
||||
@$(CC) -c $(CFLAGS) $< -o $@
|
||||
|
||||
clean:
|
||||
rm -f $(OBJ) gpio *~ core tags
|
||||
|
||||
tags: $(SRC)
|
||||
@echo [ctags]
|
||||
@ctags $(SRC)
|
||||
|
||||
depend:
|
||||
makedepend -Y $(SRC)
|
||||
|
||||
install:
|
||||
cp gpio /usr/local/bin
|
||||
chown root.root /usr/local/bin/gpio
|
||||
chmod 4755 /usr/local/bin/gpio
|
||||
mkdir -p /usr/local/man/man1
|
||||
cp gpio.1 /usr/local/man/man1
|
||||
|
||||
uninstall:
|
||||
rm -f /usr/local/bin/gpio
|
||||
rm -f /usr/local/man/man1/gpio.1
|
||||
|
||||
# DO NOT DELETE
|
||||
|
|
@ -0,0 +1,179 @@
|
|||
.TH "GPIO" "14 June 2012" "Command-Line access to Raspberry Pi and PiFace GPIO"
|
||||
|
||||
.SH NAME
|
||||
gpio \- Command-line access to Raspberry Pi and PiFace GPIO
|
||||
|
||||
.SH SYNOPSIS
|
||||
.TP
|
||||
.B gpio
|
||||
.RB [ \-v ]
|
||||
.TP
|
||||
.B gpio
|
||||
.RB [ \-g ]
|
||||
.RB < read/write/pwm/mode ...>
|
||||
.TP
|
||||
.B gpio
|
||||
.RB [ \-p ]
|
||||
.RB < read/write/mode ...>
|
||||
.TP
|
||||
.B gpio
|
||||
.RB < export/edge/unexport/unexportall/exports ...>
|
||||
|
||||
.SH DESCRIPTION
|
||||
|
||||
.B GPIO
|
||||
is a command line tool to allow the user easy access to the GPIO pins
|
||||
on the Raspberry Pi. It's designed for simple testing and diagnostic
|
||||
purposes, but can be used in shell scripts for general if somewhat slow
|
||||
control of the GPIO pins.
|
||||
|
||||
Additionally, it can be used to set the exports in the \fI/sys/class/gpio\fR
|
||||
system directory to allow subsequent programs to use the \fR/sys/class/gpio\fR
|
||||
interface without needing to be run as root.
|
||||
|
||||
.SH OPTIONS
|
||||
|
||||
.TP
|
||||
.B \-v
|
||||
Output the current version
|
||||
|
||||
.TP
|
||||
.B \-g
|
||||
Use the BCM_GPIO pins numbers rather than wiringPi pin numbers.
|
||||
|
||||
.TP
|
||||
.B \-p
|
||||
Use the PiFace interface board and its corresponding pin numbers.
|
||||
|
||||
.TP
|
||||
.B read
|
||||
Read the digital value of the given pin and print 0 or 1 to represent the
|
||||
respective logic levels.
|
||||
|
||||
.TP
|
||||
.B write
|
||||
Write the given value (0 or 1) to the pin.
|
||||
|
||||
.TP
|
||||
.B pwm
|
||||
Write a PWM value (0-1023) to the given pin.
|
||||
|
||||
.TP
|
||||
.B mode
|
||||
Set a pin into \fIinput\fR, \fIoutput\fR or \fIpwm\fR mode. Can also
|
||||
use the literals \fIup\fR, \fIdown\fR or \fItri\fR to set the internal
|
||||
pull-up, pull-down or tristate (off) controls.
|
||||
|
||||
.TP
|
||||
.B export
|
||||
Export a GPIO pin in the \fI/sys/class/gpio\fR directory. Use like the
|
||||
mode command above however only \fIin\fR and \fIout\fR are supported at
|
||||
this time. Note that the pin number is the \fBBCM_GPIO\fR number and
|
||||
not the wiringPi number.
|
||||
|
||||
Once a GPIO pin has been exported, the \fBgpio\fR program changes the
|
||||
ownership of the \fI/sys/class/gpio/gpioX/value\fR and if present in
|
||||
later kernels, the \fI/sys/class/gpio/gpioX/edge\fR pseudo files to
|
||||
that of the user running the \fBgpio\fR program. This means that you
|
||||
can have a small script of gpio exports to setup the gpio pins as your
|
||||
program requires without the need to run anything as root, or with the
|
||||
sudo command.
|
||||
|
||||
.TP
|
||||
.B edge
|
||||
This exports a GPIO pin in the \fI/sys/class/gpio\fR directory, set
|
||||
the direction to input and set the edge interrupt method to \fInone\fR,
|
||||
\fIrising\fR, \fIfalling\fR or \fIboth\fR. Use like the export command
|
||||
above and note that \fBBCM_GPIO\fR pin number is used not not wiringPi pin
|
||||
numbering.
|
||||
|
||||
Like the export commands abovem ownership is set to that of the
|
||||
calling user, allowing subsequent access from user programs without
|
||||
requiring root/sudo.
|
||||
|
||||
.TP
|
||||
.B unexport
|
||||
Un-Export a GPIO pin in the /sys/class/gpio directory.
|
||||
|
||||
.TP
|
||||
.B unexportall
|
||||
Un-Export all the GPIO pins in the /sys/class/gpio directory.
|
||||
|
||||
.TP
|
||||
.B exports
|
||||
Print a list (if any) of all the exported GPIO pins and their current values.
|
||||
|
||||
.SH "WiringPi vs. GPIO Pin numbering"
|
||||
|
||||
.PP
|
||||
.TS
|
||||
r r l.
|
||||
WiringPi GPIO Function
|
||||
_
|
||||
0 17
|
||||
1 18 (PWM)
|
||||
2 21
|
||||
3 22
|
||||
4 23
|
||||
5 24
|
||||
6 25
|
||||
7 4
|
||||
8 0 SDA0
|
||||
9 1 SCL0
|
||||
10 8 SPI CE0
|
||||
11 7 SPI CE1
|
||||
12 10 SPI MOSI
|
||||
13 9 SPI MISO
|
||||
14 11 SPI SCLK
|
||||
15 14 TxD
|
||||
16 15 RxD
|
||||
.TE
|
||||
|
||||
.SH FILES
|
||||
|
||||
.TP 2.2i
|
||||
.I gpio
|
||||
executable
|
||||
|
||||
.SH EXAMPLES
|
||||
.TP 2.2i
|
||||
gpio mode 4 output # Set pin 4 to output
|
||||
.PP
|
||||
gpio -g mode 23 output # Set GPIO pin 23 to output (same as WiringPi pin 4)
|
||||
.PP
|
||||
gpio mode 1 pwm # Set pin 1 to PWM mode
|
||||
.PP
|
||||
gpio pwm 1 512 # Set pin 1 to PWM value 512 - half brightness
|
||||
.PP
|
||||
gpio export 17 out # Set GPIO Pin 17 to output
|
||||
.PP
|
||||
gpio export 0 in # Set GPIO Pin 0 (SDA0) to input.
|
||||
.PP
|
||||
gpio -g read 0 # Read GPIO Pin 0 (SDA0)
|
||||
|
||||
.SH "NOTES"
|
||||
|
||||
When using the \fIexport\fR, \fIedge\fR or \fIunexport\fR commands, the
|
||||
pin numbers are \fBalways\fR native BCM_GPIO numbers and never wiringPi
|
||||
pin numbers.
|
||||
|
||||
.SH "SEE ALSO"
|
||||
|
||||
.LP
|
||||
WiringPi's home page
|
||||
.IP
|
||||
https://projects.drogon.net/raspberry-pi/wiringpi/
|
||||
|
||||
.SH AUTHOR
|
||||
|
||||
Gordon Henderson
|
||||
|
||||
.SH "REPORTING BUGS"
|
||||
|
||||
Report bugs to <gordon@drogon.net>
|
||||
|
||||
.SH COPYRIGHT
|
||||
|
||||
Copyright (c) 2012 Gordon Henderson
|
||||
This is free software; see the source for copying conditions. There is NO
|
||||
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
||||
|
|
@ -0,0 +1,755 @@
|
|||
/*
|
||||
* gpio.c:
|
||||
* Set-UID command-line interface to the Raspberry Pi's GPIO
|
||||
* Copyright (c) 2012 Gordon Henderson
|
||||
***********************************************************************
|
||||
* This file is part of wiringPi:
|
||||
* https://projects.drogon.net/raspberry-pi/wiringpi/
|
||||
*
|
||||
* wiringPi is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License as published by
|
||||
* the Free Software Foundation, either version 3 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* wiringPi is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public License
|
||||
* along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
|
||||
***********************************************************************
|
||||
*/
|
||||
|
||||
#include <wiringPi.h>
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <stdint.h>
|
||||
#include <string.h>
|
||||
#include <unistd.h>
|
||||
#include <errno.h>
|
||||
#include <sys/types.h>
|
||||
#include <fcntl.h>
|
||||
|
||||
#ifndef TRUE
|
||||
# define TRUE (1==1)
|
||||
# define FALSE (1==2)
|
||||
#endif
|
||||
|
||||
#define VERSION "1.1"
|
||||
|
||||
static int wpMode ;
|
||||
|
||||
char *usage = "Usage: gpio -v\n"
|
||||
" gpio [-g] <read/write/pwm/mode> ...\n"
|
||||
" gpio [-p] <read/write/mode> ...\n"
|
||||
" gpio export/edge/unexport/unexportall/exports ...\n"
|
||||
" gpio drive <group> <value>\n"
|
||||
" gpio load spi/i2c" ;
|
||||
|
||||
|
||||
|
||||
/*
|
||||
* changeOwner:
|
||||
* Change the ownership of the file to the real userId of the calling
|
||||
* program so we can access it.
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
static void changeOwner (char *cmd, char *file)
|
||||
{
|
||||
uid_t uid = getuid () ;
|
||||
uid_t gid = getgid () ;
|
||||
|
||||
if (chown (file, uid, gid) != 0)
|
||||
{
|
||||
if (errno == ENOENT) // Warn that it's not there
|
||||
fprintf (stderr, "%s: Warning: File not present: %s\n", cmd, file) ;
|
||||
else
|
||||
{
|
||||
fprintf (stderr, "%s: Unable to change ownership of %s: %s\n", cmd, file, strerror (errno)) ;
|
||||
exit (1) ;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* moduleLoaded:
|
||||
* Return true/false if the supplied module is loaded
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
static int moduleLoaded (char *modName)
|
||||
{
|
||||
int len = strlen (modName) ;
|
||||
int found = FALSE ;
|
||||
FILE *fd = fopen ("/proc/modules", "r") ;
|
||||
char line [80] ;
|
||||
|
||||
if (fd == NULL)
|
||||
{
|
||||
fprintf (stderr, "gpio: Unable to check modules: %s\n", strerror (errno)) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
while (fgets (line, 80, fd) != NULL)
|
||||
{
|
||||
if (strncmp (line, modName, len) != 0)
|
||||
continue ;
|
||||
|
||||
found = TRUE ;
|
||||
break ;
|
||||
}
|
||||
|
||||
fclose (fd) ;
|
||||
|
||||
return found ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* doLoad:
|
||||
* Load either the spi or i2c modules and change device ownerships, etc.
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
static void _doLoadUsage (char *argv [])
|
||||
{
|
||||
fprintf (stderr, "Usage: %s load <spi/i2c>\n", argv [0]) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
static void doLoad (int argc, char *argv [])
|
||||
{
|
||||
char *module ;
|
||||
char cmd [80] ;
|
||||
char *file1, *file2 ;
|
||||
|
||||
if (argc != 3)
|
||||
_doLoadUsage (argv) ;
|
||||
|
||||
/**/ if (strcasecmp (argv [2], "spi") == 0)
|
||||
{
|
||||
module = "spi_bcm2708" ;
|
||||
file1 = "/dev/spidev0.0" ;
|
||||
file2 = "/dev/spidev0.1" ;
|
||||
}
|
||||
else if (strcasecmp (argv [2], "i2c") == 0)
|
||||
{
|
||||
module = "i2c_bcm2708" ;
|
||||
file1 = "/dev/i2c-0" ;
|
||||
file2 = "/dev/i2c-1" ;
|
||||
}
|
||||
else
|
||||
_doLoadUsage (argv) ;
|
||||
|
||||
if (!moduleLoaded (module))
|
||||
{
|
||||
sprintf (cmd, "modprobe %s", module) ;
|
||||
system (cmd) ;
|
||||
}
|
||||
|
||||
if (!moduleLoaded (module))
|
||||
{
|
||||
fprintf (stderr, "%s: Unable to load %s\n", argv [0], module) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
sleep (1) ; // To let things get settled
|
||||
|
||||
changeOwner (argv [0], file1) ;
|
||||
changeOwner (argv [0], file2) ;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
* doExports:
|
||||
* List all GPIO exports
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void doExports (void)
|
||||
{
|
||||
int fd ;
|
||||
int i, l, first ;
|
||||
char fName [128] ;
|
||||
char buf [16] ;
|
||||
|
||||
// Rather crude, but who knows what others are up to...
|
||||
|
||||
for (first = 0, i = 0 ; i < 64 ; ++i)
|
||||
{
|
||||
|
||||
// Try to read the direction
|
||||
|
||||
sprintf (fName, "/sys/class/gpio/gpio%d/direction", i) ;
|
||||
if ((fd = open (fName, O_RDONLY)) == -1)
|
||||
continue ;
|
||||
|
||||
if (first == 0)
|
||||
{
|
||||
++first ;
|
||||
printf ("GPIO Pins exported:\n") ;
|
||||
}
|
||||
|
||||
printf ("%4d: ", i) ;
|
||||
|
||||
if ((l = read (fd, buf, 16)) == 0)
|
||||
sprintf (buf, "%s", "?") ;
|
||||
|
||||
buf [l] = 0 ;
|
||||
if ((buf [strlen (buf) - 1]) == '\n')
|
||||
buf [strlen (buf) - 1] = 0 ;
|
||||
|
||||
printf ("%-3s", buf) ;
|
||||
|
||||
close (fd) ;
|
||||
|
||||
// Try to Read the value
|
||||
|
||||
sprintf (fName, "/sys/class/gpio/gpio%d/value", i) ;
|
||||
if ((fd = open (fName, O_RDONLY)) == -1)
|
||||
{
|
||||
printf ("No Value file (huh?)\n") ;
|
||||
continue ;
|
||||
}
|
||||
|
||||
if ((l = read (fd, buf, 16)) == 0)
|
||||
sprintf (buf, "%s", "?") ;
|
||||
|
||||
buf [l] = 0 ;
|
||||
if ((buf [strlen (buf) - 1]) == '\n')
|
||||
buf [strlen (buf) - 1] = 0 ;
|
||||
|
||||
printf (" %s", buf) ;
|
||||
|
||||
// Read any edge trigger file
|
||||
|
||||
sprintf (fName, "/sys/class/gpio/gpio%d/edge", i) ;
|
||||
if ((fd = open (fName, O_RDONLY)) == -1)
|
||||
{
|
||||
printf ("\n") ;
|
||||
continue ;
|
||||
}
|
||||
|
||||
if ((l = read (fd, buf, 16)) == 0)
|
||||
sprintf (buf, "%s", "?") ;
|
||||
|
||||
buf [l] = 0 ;
|
||||
if ((buf [strlen (buf) - 1]) == '\n')
|
||||
buf [strlen (buf) - 1] = 0 ;
|
||||
|
||||
printf (" %-8s\n", buf) ;
|
||||
|
||||
close (fd) ;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* doExport:
|
||||
* gpio export pin mode
|
||||
* This uses the /sys/class/gpio device interface.
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void doExport (int argc, char *argv [])
|
||||
{
|
||||
FILE *fd ;
|
||||
int pin ;
|
||||
char *mode ;
|
||||
char fName [128] ;
|
||||
|
||||
if (argc != 4)
|
||||
{
|
||||
fprintf (stderr, "Usage: %s export pin mode\n", argv [0]) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
pin = atoi (argv [2]) ;
|
||||
|
||||
mode = argv [3] ;
|
||||
|
||||
if ((fd = fopen ("/sys/class/gpio/export", "w")) == NULL)
|
||||
{
|
||||
fprintf (stderr, "%s: Unable to open GPIO export interface: %s\n", argv [0], strerror (errno)) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
fprintf (fd, "%d\n", pin) ;
|
||||
fclose (fd) ;
|
||||
|
||||
sprintf (fName, "/sys/class/gpio/gpio%d/direction", pin) ;
|
||||
if ((fd = fopen (fName, "w")) == NULL)
|
||||
{
|
||||
fprintf (stderr, "%s: Unable to open GPIO direction interface for pin %d: %s\n", argv [0], pin, strerror (errno)) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
/**/ if ((strcasecmp (mode, "in") == 0) || (strcasecmp (mode, "input") == 0))
|
||||
fprintf (fd, "in\n") ;
|
||||
else if ((strcasecmp (mode, "out") == 0) || (strcasecmp (mode, "output") == 0))
|
||||
fprintf (fd, "out\n") ;
|
||||
else
|
||||
{
|
||||
fprintf (stderr, "%s: Invalid mode: %s. Should be in or out\n", argv [1], mode) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
fclose (fd) ;
|
||||
|
||||
// Change ownership so the current user can actually use it!
|
||||
|
||||
sprintf (fName, "/sys/class/gpio/gpio%d/value", pin) ;
|
||||
changeOwner (argv [0], fName) ;
|
||||
|
||||
sprintf (fName, "/sys/class/gpio/gpio%d/edge", pin) ;
|
||||
changeOwner (argv [0], fName) ;
|
||||
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* doEdge:
|
||||
* gpio edge pin mode
|
||||
* Easy access to changing the edge trigger on a GPIO pin
|
||||
* This uses the /sys/class/gpio device interface.
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void doEdge (int argc, char *argv [])
|
||||
{
|
||||
FILE *fd ;
|
||||
int pin ;
|
||||
char *mode ;
|
||||
char fName [128] ;
|
||||
uid_t uid ;
|
||||
gid_t gid ;
|
||||
|
||||
if (argc != 4)
|
||||
{
|
||||
fprintf (stderr, "Usage: %s edge pin mode\n", argv [0]) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
pin = atoi (argv [2]) ;
|
||||
|
||||
mode = argv [3] ;
|
||||
|
||||
// Export the pin and set direction to input
|
||||
|
||||
if ((fd = fopen ("/sys/class/gpio/export", "w")) == NULL)
|
||||
{
|
||||
fprintf (stderr, "%s: Unable to open GPIO export interface: %s\n", argv [0], strerror (errno)) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
fprintf (fd, "%d\n", pin) ;
|
||||
fclose (fd) ;
|
||||
|
||||
sprintf (fName, "/sys/class/gpio/gpio%d/direction", pin) ;
|
||||
if ((fd = fopen (fName, "w")) == NULL)
|
||||
{
|
||||
fprintf (stderr, "%s: Unable to open GPIO direction interface for pin %d: %s\n", argv [0], pin, strerror (errno)) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
fprintf (fd, "in\n") ;
|
||||
fclose (fd) ;
|
||||
|
||||
sprintf (fName, "/sys/class/gpio/gpio%d/edge", pin) ;
|
||||
if ((fd = fopen (fName, "w")) == NULL)
|
||||
{
|
||||
fprintf (stderr, "%s: Unable to open GPIO edge interface for pin %d: %s\n", argv [0], pin, strerror (errno)) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
/**/ if (strcasecmp (mode, "none") == 0)
|
||||
fprintf (fd, "none\n") ;
|
||||
else if (strcasecmp (mode, "rising") == 0)
|
||||
fprintf (fd, "rising\n") ;
|
||||
else if (strcasecmp (mode, "falling") == 0)
|
||||
fprintf (fd, "falling\n") ;
|
||||
else if (strcasecmp (mode, "both") == 0)
|
||||
fprintf (fd, "both\n") ;
|
||||
else
|
||||
{
|
||||
fprintf (stderr, "%s: Invalid mode: %s. Should be none, rising, falling or both\n", argv [1], mode) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
// Change ownership so the current user can actually use it!
|
||||
|
||||
uid = getuid () ;
|
||||
gid = getgid () ;
|
||||
|
||||
sprintf (fName, "/sys/class/gpio/gpio%d/value", pin) ;
|
||||
if (chown (fName, uid, gid) != 0)
|
||||
{
|
||||
fprintf (stderr, "%s: Unable to change ownership of the value file: %s\n", argv [1], strerror (errno)) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
// Also change ownership of the edge file
|
||||
|
||||
sprintf (fName, "/sys/class/gpio/gpio%d/edge", pin) ;
|
||||
if (chown (fName, uid, gid) != 0)
|
||||
{
|
||||
fprintf (stderr, "%s: Unable to change ownership of the value file: %s\n", argv [1], strerror (errno)) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
fclose (fd) ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* doUnexport:
|
||||
* gpio unexport pin
|
||||
* This uses the /sys/class/gpio device interface.
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void doUnexport (int argc, char *argv [])
|
||||
{
|
||||
FILE *fd ;
|
||||
int pin ;
|
||||
|
||||
if (argc != 3)
|
||||
{
|
||||
fprintf (stderr, "Usage: %s unexport pin\n", argv [0]) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
pin = atoi (argv [2]) ;
|
||||
|
||||
if ((fd = fopen ("/sys/class/gpio/unexport", "w")) == NULL)
|
||||
{
|
||||
fprintf (stderr, "%s: Unable to open GPIO export interface\n", argv [0]) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
fprintf (fd, "%d\n", pin) ;
|
||||
fclose (fd) ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* doUnexportAll:
|
||||
* gpio unexportall
|
||||
* Un-Export all the GPIO pins.
|
||||
* This uses the /sys/class/gpio device interface.
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void doUnexportall (int argc, char *argv [])
|
||||
{
|
||||
FILE *fd ;
|
||||
int pin ;
|
||||
|
||||
for (pin = 0 ; pin < 63 ; ++pin)
|
||||
{
|
||||
if ((fd = fopen ("/sys/class/gpio/unexport", "w")) == NULL)
|
||||
{
|
||||
fprintf (stderr, "%s: Unable to open GPIO export interface\n", argv [0]) ;
|
||||
exit (1) ;
|
||||
}
|
||||
fprintf (fd, "%d\n", pin) ;
|
||||
fclose (fd) ;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* doMode:
|
||||
* gpio mode pin mode ...
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void doMode (int argc, char *argv [])
|
||||
{
|
||||
int pin ;
|
||||
char *mode ;
|
||||
|
||||
if (argc != 4)
|
||||
{
|
||||
fprintf (stderr, "Usage: %s mode pin mode\n", argv [0]) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
pin = atoi (argv [2]) ;
|
||||
|
||||
if ((wpMode == WPI_MODE_PINS) && ((pin < 0) || (pin >= NUM_PINS)))
|
||||
return ;
|
||||
|
||||
mode = argv [3] ;
|
||||
|
||||
/**/ if (strcasecmp (mode, "in") == 0)
|
||||
pinMode (pin, INPUT) ;
|
||||
else if (strcasecmp (mode, "out") == 0)
|
||||
pinMode (pin, OUTPUT) ;
|
||||
else if (strcasecmp (mode, "pwm") == 0)
|
||||
pinMode (pin, PWM_OUTPUT) ;
|
||||
else if (strcasecmp (mode, "up") == 0)
|
||||
pullUpDnControl (pin, PUD_UP) ;
|
||||
else if (strcasecmp (mode, "down") == 0)
|
||||
pullUpDnControl (pin, PUD_DOWN) ;
|
||||
else if (strcasecmp (mode, "tri") == 0)
|
||||
pullUpDnControl (pin, PUD_OFF) ;
|
||||
else
|
||||
{
|
||||
fprintf (stderr, "%s: Invalid mode: %s. Should be in/out/pwm/up/down/tri\n", argv [1], mode) ;
|
||||
exit (1) ;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* doPadDrive:
|
||||
* gpio drive group value
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void doPadDrive (int argc, char *argv [])
|
||||
{
|
||||
int group, val ;
|
||||
|
||||
if (argc != 4)
|
||||
{
|
||||
fprintf (stderr, "Usage: %s drive group value\n", argv [0]) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
group = atoi (argv [2]) ;
|
||||
val = atoi (argv [3]) ;
|
||||
|
||||
if ((group < 0) || (group > 2))
|
||||
{
|
||||
fprintf (stderr, "%s: drive group not 0, 1 or 2: %d\n", argv [0], group) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
if ((val < 0) || (val > 7))
|
||||
{
|
||||
fprintf (stderr, "%s: drive value not 0-7: %d\n", argv [0], val) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
setPadDrive (group, val) ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* doWrite:
|
||||
* gpio write pin value
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void doWrite (int argc, char *argv [])
|
||||
{
|
||||
int pin, val ;
|
||||
|
||||
if (argc != 4)
|
||||
{
|
||||
fprintf (stderr, "Usage: %s write pin value\n", argv [0]) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
pin = atoi (argv [2]) ;
|
||||
|
||||
if ((wpMode == WPI_MODE_PINS) && ((pin < 0) || (pin >= NUM_PINS)))
|
||||
return ;
|
||||
|
||||
val = atoi (argv [3]) ;
|
||||
|
||||
/**/ if (val == 0)
|
||||
digitalWrite (pin, LOW) ;
|
||||
else
|
||||
digitalWrite (pin, HIGH) ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* doRead:
|
||||
* Read a pin and return the value
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void doRead (int argc, char *argv [])
|
||||
{
|
||||
int pin, val ;
|
||||
|
||||
if (argc != 3)
|
||||
{
|
||||
fprintf (stderr, "Usage: %s read pin\n", argv [0]) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
pin = atoi (argv [2]) ;
|
||||
|
||||
if ((wpMode == WPI_MODE_PINS) && ((pin < 0) || (pin >= NUM_PINS)))
|
||||
{
|
||||
printf ("0\n") ;
|
||||
return ;
|
||||
}
|
||||
|
||||
val = digitalRead (pin) ;
|
||||
|
||||
printf ("%s\n", val == 0 ? "0" : "1") ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* doPwm:
|
||||
* Output a PWM value on a pin
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void doPwm (int argc, char *argv [])
|
||||
{
|
||||
int pin, val ;
|
||||
|
||||
if (argc != 4)
|
||||
{
|
||||
fprintf (stderr, "Usage: %s pwm <pin> <value>\n", argv [0]) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
pin = atoi (argv [2]) ;
|
||||
|
||||
if ((wpMode == WPI_MODE_PINS) && ((pin < 0) || (pin >= NUM_PINS)))
|
||||
return ;
|
||||
|
||||
val = atoi (argv [3]) ;
|
||||
|
||||
pwmWrite (pin, val) ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* main:
|
||||
* Start here
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
int main (int argc, char *argv [])
|
||||
{
|
||||
int i ;
|
||||
|
||||
if (argc == 1)
|
||||
{
|
||||
fprintf (stderr, "%s: %s\n", argv [0], usage) ;
|
||||
return 1 ;
|
||||
}
|
||||
|
||||
if (strcasecmp (argv [1], "-v") == 0)
|
||||
{
|
||||
printf ("gpio version: %s\n", VERSION) ;
|
||||
printf ("Copyright (c) 2012 Gordon Henderson\n") ;
|
||||
printf ("This is free software with ABSOLUTELY NO WARRANTY.\n") ;
|
||||
printf ("For details type: %s -warranty\n", argv [0]) ;
|
||||
return 0 ;
|
||||
}
|
||||
|
||||
if (strcasecmp (argv [1], "-warranty") == 0)
|
||||
{
|
||||
printf ("gpio version: %s\n", VERSION) ;
|
||||
printf ("Copyright (c) 2012 Gordon Henderson\n") ;
|
||||
printf ("\n") ;
|
||||
printf (" This program is free software; you can redistribute it and/or modify\n") ;
|
||||
printf (" it under the terms of the GNU Leser General Public License as published\n") ;
|
||||
printf (" by the Free Software Foundation, either version 3 of the License, or\n") ;
|
||||
printf (" (at your option) any later version.\n") ;
|
||||
printf ("\n") ;
|
||||
printf (" This program is distributed in the hope that it will be useful,\n") ;
|
||||
printf (" but WITHOUT ANY WARRANTY; without even the implied warranty of\n") ;
|
||||
printf (" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n") ;
|
||||
printf (" GNU Lesser General Public License for more details.\n") ;
|
||||
printf ("\n") ;
|
||||
printf (" You should have received a copy of the GNU Lesser General Public License\n") ;
|
||||
printf (" along with this program. If not, see <http://www.gnu.org/licenses/>.\n") ;
|
||||
printf ("\n") ;
|
||||
return 0 ;
|
||||
}
|
||||
|
||||
if (geteuid () != 0)
|
||||
{
|
||||
fprintf (stderr, "%s: Must be root to run. Program should be suid root. This is an error.\n", argv [0]) ;
|
||||
return 1 ;
|
||||
}
|
||||
|
||||
// Initial test for /sys/class/gpio operations:
|
||||
|
||||
/**/ if (strcasecmp (argv [1], "exports" ) == 0) { doExports () ; return 0 ; }
|
||||
else if (strcasecmp (argv [1], "export" ) == 0) { doExport (argc, argv) ; return 0 ; }
|
||||
else if (strcasecmp (argv [1], "edge" ) == 0) { doEdge (argc, argv) ; return 0 ; }
|
||||
else if (strcasecmp (argv [1], "unexportall") == 0) { doUnexportall (argc, argv) ; return 0 ; }
|
||||
else if (strcasecmp (argv [1], "unexport" ) == 0) { doUnexport (argc, argv) ; return 0 ; }
|
||||
else if (strcasecmp (argv [1], "load" ) == 0) { doLoad (argc, argv) ; return 0 ; }
|
||||
|
||||
// Check for -g argument
|
||||
|
||||
if (strcasecmp (argv [1], "-g") == 0)
|
||||
{
|
||||
if (wiringPiSetupGpio () == -1)
|
||||
{
|
||||
fprintf (stderr, "%s: Unable to initialise GPIO in GPIO mode.\n", argv [0]) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
for (i = 2 ; i < argc ; ++i)
|
||||
argv [i - 1] = argv [i] ;
|
||||
--argc ;
|
||||
wpMode = WPI_MODE_GPIO ;
|
||||
}
|
||||
|
||||
// Check for -p argument for PiFace
|
||||
|
||||
else if (strcasecmp (argv [1], "-p") == 0)
|
||||
{
|
||||
if (wiringPiSetupPiFaceForGpioProg () == -1)
|
||||
{
|
||||
fprintf (stderr, "%s: Unable to initialise PiFace.\n", argv [0]) ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
for (i = 2 ; i < argc ; ++i)
|
||||
argv [i - 1] = argv [i] ;
|
||||
--argc ;
|
||||
wpMode = WPI_MODE_PIFACE ;
|
||||
}
|
||||
|
||||
// Default to wiringPi mode
|
||||
|
||||
else
|
||||
{
|
||||
if (wiringPiSetup () == -1)
|
||||
{
|
||||
fprintf (stderr, "%s: Unable to initialise GPIO in wiringPi mode\n", argv [0]) ;
|
||||
exit (1) ;
|
||||
}
|
||||
wpMode = WPI_MODE_PINS ;
|
||||
}
|
||||
|
||||
// Check for wiring commands
|
||||
|
||||
/**/ if (strcasecmp (argv [1], "write" ) == 0)
|
||||
doWrite (argc, argv) ;
|
||||
else if (strcasecmp (argv [1], "read" ) == 0)
|
||||
doRead (argc, argv) ;
|
||||
else if (strcasecmp (argv [1], "mode" ) == 0)
|
||||
doMode (argc, argv) ;
|
||||
else if (strcasecmp (argv [1], "pwm" ) == 0)
|
||||
doPwm (argc, argv) ;
|
||||
else if (strcasecmp (argv [1], "drive" ) == 0)
|
||||
doPadDrive (argc, argv) ;
|
||||
else
|
||||
{
|
||||
fprintf (stderr, "%s: Unknown command: %s. (read/write/pwm/mode/drive expected)\n", argv [0], argv [1]) ;
|
||||
exit (1) ;
|
||||
}
|
||||
return 0 ;
|
||||
}
|
||||
|
|
@ -0,0 +1,23 @@
|
|||
#!/bin/bash
|
||||
|
||||
# Simple test - assumes LEDs on Pins 0-7.
|
||||
|
||||
for i in `seq 0 7`;
|
||||
do
|
||||
gpio mode $i out
|
||||
done
|
||||
|
||||
while true;
|
||||
do
|
||||
for i in `seq 0 7`;
|
||||
do
|
||||
gpio write $i 1
|
||||
sleep 0.1
|
||||
done
|
||||
|
||||
for i in `seq 0 7`;
|
||||
do
|
||||
gpio write $i 0
|
||||
sleep 0.1
|
||||
done
|
||||
done
|
||||
Binary file not shown.
|
|
@ -0,0 +1,165 @@
|
|||
GNU LESSER GENERAL PUBLIC LICENSE
|
||||
Version 3, 29 June 2007
|
||||
|
||||
Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
|
||||
Everyone is permitted to copy and distribute verbatim copies
|
||||
of this license document, but changing it is not allowed.
|
||||
|
||||
|
||||
This version of the GNU Lesser General Public License incorporates
|
||||
the terms and conditions of version 3 of the GNU General Public
|
||||
License, supplemented by the additional permissions listed below.
|
||||
|
||||
0. Additional Definitions.
|
||||
|
||||
As used herein, "this License" refers to version 3 of the GNU Lesser
|
||||
General Public License, and the "GNU GPL" refers to version 3 of the GNU
|
||||
General Public License.
|
||||
|
||||
"The Library" refers to a covered work governed by this License,
|
||||
other than an Application or a Combined Work as defined below.
|
||||
|
||||
An "Application" is any work that makes use of an interface provided
|
||||
by the Library, but which is not otherwise based on the Library.
|
||||
Defining a subclass of a class defined by the Library is deemed a mode
|
||||
of using an interface provided by the Library.
|
||||
|
||||
A "Combined Work" is a work produced by combining or linking an
|
||||
Application with the Library. The particular version of the Library
|
||||
with which the Combined Work was made is also called the "Linked
|
||||
Version".
|
||||
|
||||
The "Minimal Corresponding Source" for a Combined Work means the
|
||||
Corresponding Source for the Combined Work, excluding any source code
|
||||
for portions of the Combined Work that, considered in isolation, are
|
||||
based on the Application, and not on the Linked Version.
|
||||
|
||||
The "Corresponding Application Code" for a Combined Work means the
|
||||
object code and/or source code for the Application, including any data
|
||||
and utility programs needed for reproducing the Combined Work from the
|
||||
Application, but excluding the System Libraries of the Combined Work.
|
||||
|
||||
1. Exception to Section 3 of the GNU GPL.
|
||||
|
||||
You may convey a covered work under sections 3 and 4 of this License
|
||||
without being bound by section 3 of the GNU GPL.
|
||||
|
||||
2. Conveying Modified Versions.
|
||||
|
||||
If you modify a copy of the Library, and, in your modifications, a
|
||||
facility refers to a function or data to be supplied by an Application
|
||||
that uses the facility (other than as an argument passed when the
|
||||
facility is invoked), then you may convey a copy of the modified
|
||||
version:
|
||||
|
||||
a) under this License, provided that you make a good faith effort to
|
||||
ensure that, in the event an Application does not supply the
|
||||
function or data, the facility still operates, and performs
|
||||
whatever part of its purpose remains meaningful, or
|
||||
|
||||
b) under the GNU GPL, with none of the additional permissions of
|
||||
this License applicable to that copy.
|
||||
|
||||
3. Object Code Incorporating Material from Library Header Files.
|
||||
|
||||
The object code form of an Application may incorporate material from
|
||||
a header file that is part of the Library. You may convey such object
|
||||
code under terms of your choice, provided that, if the incorporated
|
||||
material is not limited to numerical parameters, data structure
|
||||
layouts and accessors, or small macros, inline functions and templates
|
||||
(ten or fewer lines in length), you do both of the following:
|
||||
|
||||
a) Give prominent notice with each copy of the object code that the
|
||||
Library is used in it and that the Library and its use are
|
||||
covered by this License.
|
||||
|
||||
b) Accompany the object code with a copy of the GNU GPL and this license
|
||||
document.
|
||||
|
||||
4. Combined Works.
|
||||
|
||||
You may convey a Combined Work under terms of your choice that,
|
||||
taken together, effectively do not restrict modification of the
|
||||
portions of the Library contained in the Combined Work and reverse
|
||||
engineering for debugging such modifications, if you also do each of
|
||||
the following:
|
||||
|
||||
a) Give prominent notice with each copy of the Combined Work that
|
||||
the Library is used in it and that the Library and its use are
|
||||
covered by this License.
|
||||
|
||||
b) Accompany the Combined Work with a copy of the GNU GPL and this license
|
||||
document.
|
||||
|
||||
c) For a Combined Work that displays copyright notices during
|
||||
execution, include the copyright notice for the Library among
|
||||
these notices, as well as a reference directing the user to the
|
||||
copies of the GNU GPL and this license document.
|
||||
|
||||
d) Do one of the following:
|
||||
|
||||
0) Convey the Minimal Corresponding Source under the terms of this
|
||||
License, and the Corresponding Application Code in a form
|
||||
suitable for, and under terms that permit, the user to
|
||||
recombine or relink the Application with a modified version of
|
||||
the Linked Version to produce a modified Combined Work, in the
|
||||
manner specified by section 6 of the GNU GPL for conveying
|
||||
Corresponding Source.
|
||||
|
||||
1) Use a suitable shared library mechanism for linking with the
|
||||
Library. A suitable mechanism is one that (a) uses at run time
|
||||
a copy of the Library already present on the user's computer
|
||||
system, and (b) will operate properly with a modified version
|
||||
of the Library that is interface-compatible with the Linked
|
||||
Version.
|
||||
|
||||
e) Provide Installation Information, but only if you would otherwise
|
||||
be required to provide such information under section 6 of the
|
||||
GNU GPL, and only to the extent that such information is
|
||||
necessary to install and execute a modified version of the
|
||||
Combined Work produced by recombining or relinking the
|
||||
Application with a modified version of the Linked Version. (If
|
||||
you use option 4d0, the Installation Information must accompany
|
||||
the Minimal Corresponding Source and Corresponding Application
|
||||
Code. If you use option 4d1, you must provide the Installation
|
||||
Information in the manner specified by section 6 of the GNU GPL
|
||||
for conveying Corresponding Source.)
|
||||
|
||||
5. Combined Libraries.
|
||||
|
||||
You may place library facilities that are a work based on the
|
||||
Library side by side in a single library together with other library
|
||||
facilities that are not Applications and are not covered by this
|
||||
License, and convey such a combined library under terms of your
|
||||
choice, if you do both of the following:
|
||||
|
||||
a) Accompany the combined library with a copy of the same work based
|
||||
on the Library, uncombined with any other library facilities,
|
||||
conveyed under the terms of this License.
|
||||
|
||||
b) Give prominent notice with the combined library that part of it
|
||||
is a work based on the Library, and explaining where to find the
|
||||
accompanying uncombined form of the same work.
|
||||
|
||||
6. Revised Versions of the GNU Lesser General Public License.
|
||||
|
||||
The Free Software Foundation may publish revised and/or new versions
|
||||
of the GNU Lesser General Public License from time to time. Such new
|
||||
versions will be similar in spirit to the present version, but may
|
||||
differ in detail to address new problems or concerns.
|
||||
|
||||
Each version is given a distinguishing version number. If the
|
||||
Library as you received it specifies that a certain numbered version
|
||||
of the GNU Lesser General Public License "or any later version"
|
||||
applies to it, you have the option of following the terms and
|
||||
conditions either of that published version or of any later version
|
||||
published by the Free Software Foundation. If the Library as you
|
||||
received it does not specify a version number of the GNU Lesser
|
||||
General Public License, you may choose any version of the GNU Lesser
|
||||
General Public License ever published by the Free Software Foundation.
|
||||
|
||||
If the Library as you received it specifies that a proxy can decide
|
||||
whether future versions of the GNU Lesser General Public License shall
|
||||
apply, that proxy's public statement of acceptance of any version is
|
||||
permanent authorization for you to choose that version for the
|
||||
Library.
|
||||
|
|
@ -0,0 +1,101 @@
|
|||
#
|
||||
# Makefile:
|
||||
# wiringPi - Wiring Compatable library for the Raspberry Pi
|
||||
#
|
||||
# Copyright (c) 2012 Gordon Henderson
|
||||
#################################################################################
|
||||
# This file is part of wiringPi:
|
||||
# https://projects.drogon.net/raspberry-pi/wiringpi/
|
||||
#
|
||||
# wiringPi is free software: you can redistribute it and/or modify
|
||||
# it under the terms of the GNU Lesser General Public License as published by
|
||||
# the Free Software Foundation, either version 3 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# wiringPi is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU Lesser General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU Lesser General Public License
|
||||
# along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
|
||||
#################################################################################
|
||||
|
||||
|
||||
TARGET=libwiringPi.a
|
||||
|
||||
#DEBUG = -g -O0
|
||||
DEBUG = -O3
|
||||
CC = gcc
|
||||
INCLUDE = -I.
|
||||
CFLAGS = $(DEBUG) -Wall $(INCLUDE) -Winline -pipe
|
||||
|
||||
LIBS =
|
||||
|
||||
# Should not alter anything below this line
|
||||
###############################################################################
|
||||
|
||||
SRC = wiringPi.c wiringPiFace.c wiringSerial.c wiringShift.c \
|
||||
gertboard.c \
|
||||
piNes.c \
|
||||
lcd.c piHiPri.c piThread.c
|
||||
|
||||
OBJ = wiringPi.o wiringPiFace.o wiringSerial.o wiringShift.o \
|
||||
gertboard.o \
|
||||
piNes.o \
|
||||
lcd.o piHiPri.o piThread.o
|
||||
|
||||
all: $(TARGET)
|
||||
|
||||
$(TARGET): $(OBJ)
|
||||
@echo [AR] $(OBJ)
|
||||
@ar rcs $(TARGET) $(OBJ)
|
||||
@ranlib $(TARGET)
|
||||
@size $(TARGET)
|
||||
|
||||
.c.o:
|
||||
@echo [CC] $<
|
||||
@$(CC) -c $(CFLAGS) $< -o $@
|
||||
|
||||
clean:
|
||||
rm -f $(OBJ) $(TARGET) *~ core tags Makefile.bak
|
||||
|
||||
tags: $(SRC)
|
||||
@echo [ctags]
|
||||
@ctags $(SRC)
|
||||
|
||||
depend:
|
||||
makedepend -Y $(SRC)
|
||||
|
||||
install: $(TARGET)
|
||||
@echo [install]
|
||||
install -m 0755 -d /usr/local/lib
|
||||
install -m 0755 -d /usr/local/include
|
||||
install -m 0644 wiringPi.h /usr/local/include
|
||||
install -m 0644 wiringSerial.h /usr/local/include
|
||||
install -m 0644 wiringShift.h /usr/local/include
|
||||
install -m 0644 gertboard.h /usr/local/include
|
||||
install -m 0644 piNes.h /usr/local/include
|
||||
install -m 0644 lcd.h /usr/local/include
|
||||
install -m 0644 libwiringPi.a /usr/local/lib
|
||||
|
||||
uninstall:
|
||||
@echo [uninstall]
|
||||
rm -f /usr/local/include/lcd.h
|
||||
rm -f /usr/local/include/wiringShift.h
|
||||
rm -f /usr/local/include/wiringPi.h
|
||||
rm -f /usr/local/lib/libwiringPi.a
|
||||
|
||||
|
||||
|
||||
# DO NOT DELETE
|
||||
|
||||
wiringPi.o: wiringPi.h
|
||||
wiringPiFace.o: wiringPi.h
|
||||
wiringSerial.o: wiringSerial.h
|
||||
wiringShift.o: wiringPi.h wiringShift.h
|
||||
gertboard.o: gertboard.h
|
||||
piNes.o: wiringPi.h piNes.h
|
||||
lcd.o: wiringPi.h lcd.h
|
||||
piHiPri.o: wiringPi.h
|
||||
piThread.o: wiringPi.h
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
|
||||
WiringPi: An implementation of most of the Arduino Wiring
|
||||
functions for the Raspberry Pi
|
||||
|
||||
-- And a lot lot more!
|
||||
|
||||
Full details at:
|
||||
https://projects.drogon.net/raspberry-pi/wiringpi/
|
||||
|
||||
|
|
@ -0,0 +1,184 @@
|
|||
/*
|
||||
* gertboard.c:
|
||||
* Access routines for the SPI devices on the Gertboard
|
||||
* Copyright (c) 2012 Gordon Henderson
|
||||
*
|
||||
* The Gertboard has:
|
||||
*
|
||||
* An MCP3002 dual-channel A to D convertor connected
|
||||
* to the SPI bus, selected by chip-select A, and:
|
||||
*
|
||||
* An MCP4802 dual-channel D to A convertor connected
|
||||
* to the SPI bus, selected via chip-select B.
|
||||
*
|
||||
***********************************************************************
|
||||
* This file is part of wiringPi:
|
||||
* https://projects.drogon.net/raspberry-pi/wiringpi/
|
||||
*
|
||||
* wiringPi is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License as
|
||||
* published by the Free Software Foundation, either version 3 of the
|
||||
* License, or (at your option) any later version.
|
||||
*
|
||||
* wiringPi is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with wiringPi.
|
||||
* If not, see <http://www.gnu.org/licenses/>.
|
||||
***********************************************************************
|
||||
*/
|
||||
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdint.h>
|
||||
#include <fcntl.h>
|
||||
#include <sys/ioctl.h>
|
||||
#include <linux/spi/spidev.h>
|
||||
|
||||
#include "gertboard.h"
|
||||
|
||||
|
||||
// The SPI bus parameters
|
||||
// Variables as they need to be passed as pointers later on
|
||||
|
||||
static char *spiA2D = "/dev/spidev0.0" ;
|
||||
static char *spiD2A = "/dev/spidev0.1" ;
|
||||
static uint8_t spiMode = 0 ;
|
||||
static uint8_t spiBPW = 8 ;
|
||||
static uint32_t spiSpeed = 100000 ; // 1MHz
|
||||
static uint16_t spiDelay = 0;
|
||||
|
||||
// Locals here to keep track of everything
|
||||
|
||||
static int spiFdA2D ;
|
||||
static int spiFdD2A ;
|
||||
|
||||
|
||||
/*
|
||||
* gertboardAnalogWrite:
|
||||
* Write an 8-bit data value to the MCP4802 Analog to digital
|
||||
* convertor on the Gertboard.
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void gertboardAnalogWrite (int chan, int value)
|
||||
{
|
||||
uint8_t spiBufTx [2] ;
|
||||
uint8_t spiBufRx [2] ;
|
||||
struct spi_ioc_transfer spi ;
|
||||
|
||||
uint8_t chanBits, dataBits ;
|
||||
|
||||
if (chan == 0)
|
||||
chanBits = 0x30 ;
|
||||
else
|
||||
chanBits = 0xB0 ;
|
||||
|
||||
chanBits |= ((value >> 4) & 0x0F) ;
|
||||
dataBits = ((value << 4) & 0xF0) ;
|
||||
|
||||
spiBufTx [0] = chanBits ;
|
||||
spiBufTx [1] = dataBits ;
|
||||
|
||||
spi.tx_buf = (unsigned long)spiBufTx ;
|
||||
spi.rx_buf = (unsigned long)spiBufRx ;
|
||||
spi.len = 2 ;
|
||||
spi.delay_usecs = spiDelay ;
|
||||
spi.speed_hz = spiSpeed ;
|
||||
spi.bits_per_word = spiBPW ;
|
||||
|
||||
ioctl (spiFdD2A, SPI_IOC_MESSAGE(1), &spi) ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* gertboardAnalogRead:
|
||||
* Return the analog value of the given channel (0/1).
|
||||
* The A/D is a 10-bit device
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
int gertboardAnalogRead (int chan)
|
||||
{
|
||||
uint8_t spiBufTx [4] ;
|
||||
uint8_t spiBufRx [4] ;
|
||||
struct spi_ioc_transfer spi ;
|
||||
|
||||
uint8_t chanBits ;
|
||||
|
||||
if (chan == 0)
|
||||
chanBits = 0b0110100 ;
|
||||
else
|
||||
chanBits = 0b0111100 ;
|
||||
|
||||
spiBufTx [0] = chanBits ;
|
||||
spiBufTx [1] = 0 ;
|
||||
|
||||
spi.tx_buf = (unsigned long)spiBufTx ;
|
||||
spi.rx_buf = (unsigned long)spiBufRx ;
|
||||
spi.len = 4 ;
|
||||
spi.delay_usecs = spiDelay ;
|
||||
spi.speed_hz = spiSpeed ;
|
||||
spi.bits_per_word = spiBPW ;
|
||||
|
||||
ioctl (spiFdA2D, SPI_IOC_MESSAGE(1), &spi) ;
|
||||
|
||||
return spiBufRx [0] << 8 | spiBufRx [1] ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* setParams:
|
||||
* Output the SPI bus parameters to the given device
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
static int setParams (int fd)
|
||||
{
|
||||
if (ioctl (fd, SPI_IOC_WR_MODE, &spiMode) < 0)
|
||||
return -1 ;
|
||||
|
||||
if (ioctl (fd, SPI_IOC_RD_MODE, &spiMode) < 0)
|
||||
return -1 ;
|
||||
|
||||
if (ioctl (fd, SPI_IOC_WR_BITS_PER_WORD, &spiBPW) < 0)
|
||||
return -1 ;
|
||||
|
||||
if (ioctl (fd, SPI_IOC_RD_BITS_PER_WORD, &spiBPW) < 0)
|
||||
return -1 ;
|
||||
|
||||
if (ioctl (fd, SPI_IOC_WR_MAX_SPEED_HZ, &spiSpeed) < 0)
|
||||
return -1 ;
|
||||
|
||||
if (ioctl (fd, SPI_IOC_RD_MAX_SPEED_HZ, &spiSpeed) < 0)
|
||||
return -1 ;
|
||||
|
||||
return 0 ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* gertboardSPISetup:
|
||||
* Initialise the SPI bus, etc.
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
int gertboardSPISetup (void)
|
||||
{
|
||||
if ((spiFdA2D = open (spiA2D, O_RDWR)) < 0)
|
||||
return -1 ;
|
||||
|
||||
if (setParams (spiFdA2D) != 0)
|
||||
return -1 ;
|
||||
|
||||
if ((spiFdD2A = open (spiD2A, O_RDWR)) < 0)
|
||||
return -1 ;
|
||||
|
||||
if (setParams (spiFdD2A) != 0)
|
||||
return -1 ;
|
||||
|
||||
return 0 ;
|
||||
}
|
||||
|
|
@ -0,0 +1,39 @@
|
|||
/*
|
||||
* gertboard.h:
|
||||
* Access routines for the SPI devices on the Gertboard
|
||||
* Copyright (c) 2012 Gordon Henderson
|
||||
*
|
||||
* The Gertboard has an MCP4802 dual-channel D to A convertor
|
||||
* connected to the SPI bus, selected via chip-select B.
|
||||
*
|
||||
***********************************************************************
|
||||
* This file is part of wiringPi:
|
||||
* https://projects.drogon.net/raspberry-pi/wiringpi/
|
||||
*
|
||||
* wiringPi is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License as
|
||||
* published by the Free Software Foundation, either version 3 of the
|
||||
* License, or (at your option) any later version.
|
||||
*
|
||||
* wiringPi is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with wiringPi.
|
||||
* If not, see <http://www.gnu.org/licenses/>.
|
||||
***********************************************************************
|
||||
*/
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
extern void gertboardAnalogWrite (int chan, int value) ;
|
||||
extern int gertboardAnalogRead (int chan) ;
|
||||
extern int gertboardSPISetup (void) ;
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
|
@ -0,0 +1,365 @@
|
|||
/*
|
||||
* lcd.c:
|
||||
* Text-based LCD driver.
|
||||
* This is designed to drive the parallel interface LCD drivers
|
||||
* based in the Hitachi HD44780U controller and compatables.
|
||||
*
|
||||
* Copyright (c) 2012 Gordon Henderson.
|
||||
***********************************************************************
|
||||
* This file is part of wiringPi:
|
||||
* https://projects.drogon.net/raspberry-pi/wiringpi/
|
||||
*
|
||||
* wiringPi is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License as published by
|
||||
* the Free Software Foundation, either version 3 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* wiringPi is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public License
|
||||
* along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
|
||||
***********************************************************************
|
||||
*/
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <stdint.h>
|
||||
#include <stdarg.h>
|
||||
|
||||
#include "wiringPi.h"
|
||||
#include "lcd.h"
|
||||
|
||||
// Commands
|
||||
|
||||
#define LCD_CLEAR 0x01
|
||||
#define LCD_HOME 0x02
|
||||
#define LCD_ENTRY 0x04
|
||||
#define LCD_ON_OFF 0x08
|
||||
#define LCD_CDSHIFT 0x10
|
||||
#define LCD_FUNC 0x20
|
||||
#define LCD_CGRAM 0x40
|
||||
#define LCD_DGRAM 0x80
|
||||
|
||||
#define LCD_ENTRY_SH 0x01
|
||||
#define LCD_ENTRY_ID 0x02
|
||||
|
||||
#define LCD_ON_OFF_B 0x01
|
||||
#define LCD_ON_OFF_C 0x02
|
||||
#define LCD_ON_OFF_D 0x04
|
||||
|
||||
#define LCD_FUNC_F 0x04
|
||||
#define LCD_FUNC_N 0x08
|
||||
#define LCD_FUNC_DL 0x10
|
||||
|
||||
#define LCD_CDSHIFT_RL 0x04
|
||||
|
||||
struct lcdDataStruct
|
||||
{
|
||||
uint8_t bits, rows, cols ;
|
||||
uint8_t rsPin, strbPin ;
|
||||
uint8_t dataPins [8] ;
|
||||
} ;
|
||||
|
||||
struct lcdDataStruct *lcds [MAX_LCDS] ;
|
||||
|
||||
|
||||
/*
|
||||
* strobe:
|
||||
* Toggle the strobe (Really the "E") pin to the device.
|
||||
* According to the docs, data is latched on the falling edge.
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
static void strobe (struct lcdDataStruct *lcd)
|
||||
{
|
||||
digitalWrite (lcd->strbPin, 1) ; delayMicroseconds (1) ;
|
||||
digitalWrite (lcd->strbPin, 0) ; delayMicroseconds (50) ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* sentDataCmd:
|
||||
* Send an data or command byte to the display.
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
static void sendDataCmd (struct lcdDataStruct *lcd, uint8_t data)
|
||||
{
|
||||
uint8_t i, d4 ;
|
||||
|
||||
if (lcd->bits == 4)
|
||||
{
|
||||
d4 = (data >> 4) & 0x0F;
|
||||
for (i = 0 ; i < 4 ; ++i)
|
||||
{
|
||||
digitalWrite (lcd->dataPins [i], (d4 & 1)) ;
|
||||
d4 >>= 1 ;
|
||||
}
|
||||
strobe (lcd) ;
|
||||
|
||||
d4 = data & 0x0F ;
|
||||
for (i = 0 ; i < 4 ; ++i)
|
||||
{
|
||||
digitalWrite (lcd->dataPins [i], (d4 & 1)) ;
|
||||
d4 >>= 1 ;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
for (i = 0 ; i < 8 ; ++i)
|
||||
{
|
||||
digitalWrite (lcd->dataPins [i], (data & 1)) ;
|
||||
data >>= 1 ;
|
||||
}
|
||||
}
|
||||
strobe (lcd) ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* putCommand:
|
||||
* Send a command byte to the display
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
static void putCommand (struct lcdDataStruct *lcd, uint8_t command)
|
||||
{
|
||||
digitalWrite (lcd->rsPin, 0) ;
|
||||
sendDataCmd (lcd, command) ;
|
||||
}
|
||||
|
||||
static void put4Command (struct lcdDataStruct *lcd, uint8_t command)
|
||||
{
|
||||
uint8_t i ;
|
||||
|
||||
digitalWrite (lcd->rsPin, 0) ;
|
||||
|
||||
for (i = 0 ; i < 4 ; ++i)
|
||||
{
|
||||
digitalWrite (lcd->dataPins [i], (command & 1)) ;
|
||||
command >>= 1 ;
|
||||
}
|
||||
strobe (lcd) ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
*********************************************************************************
|
||||
* User Code below here
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
/*
|
||||
* lcdHome: lcdClear:
|
||||
* Home the cursor or clear the screen.
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void lcdHome (int fd)
|
||||
{
|
||||
struct lcdDataStruct *lcd = lcds [fd] ;
|
||||
putCommand (lcd, LCD_HOME) ;
|
||||
}
|
||||
|
||||
void lcdClear (int fd)
|
||||
{
|
||||
struct lcdDataStruct *lcd = lcds [fd] ;
|
||||
putCommand (lcd, LCD_CLEAR) ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* lcdPosition:
|
||||
* Update the position of the cursor on the display
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
|
||||
void lcdPosition (int fd, int x, int y)
|
||||
{
|
||||
static uint8_t rowOff [4] = { 0x00, 0x40, 0x14, 0x54 } ;
|
||||
struct lcdDataStruct *lcd = lcds [fd] ;
|
||||
|
||||
putCommand (lcd, x + (LCD_DGRAM | rowOff [y])) ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* lcdPutchar:
|
||||
* Send a data byte to be displayed on the display
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void lcdPutchar (int fd, uint8_t data)
|
||||
{
|
||||
struct lcdDataStruct *lcd = lcds [fd] ;
|
||||
|
||||
digitalWrite (lcd->rsPin, 1) ;
|
||||
sendDataCmd (lcd, data) ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* lcdPuts:
|
||||
* Send a string to be displayed on the display
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void lcdPuts (int fd, char *string)
|
||||
{
|
||||
while (*string)
|
||||
lcdPutchar (fd, *string++) ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* lcdPrintf:
|
||||
* Printf to an LCD display
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void lcdPrintf (int fd, char *message, ...)
|
||||
{
|
||||
va_list argp ;
|
||||
char buffer [1024] ;
|
||||
|
||||
va_start (argp, message) ;
|
||||
vsnprintf (buffer, 1023, message, argp) ;
|
||||
va_end (argp) ;
|
||||
|
||||
lcdPuts (fd, buffer) ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* lcdInit:
|
||||
* Take a lot of parameters and initialise the LCD, and return a handle to
|
||||
* that LCD, or -1 if any error.
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
int lcdInit (int rows, int cols, int bits, int rs, int strb,
|
||||
int d0, int d1, int d2, int d3, int d4, int d5, int d6, int d7)
|
||||
{
|
||||
static int initialised = 0 ;
|
||||
|
||||
uint8_t func ;
|
||||
int i ;
|
||||
int lcdFd = -1 ;
|
||||
struct lcdDataStruct *lcd ;
|
||||
|
||||
if (initialised == 0)
|
||||
{
|
||||
initialised = 1 ;
|
||||
for (i = 0 ; i < MAX_LCDS ; ++i)
|
||||
lcds [i] = NULL ;
|
||||
}
|
||||
|
||||
// Simple sanity checks
|
||||
|
||||
if (! ((bits == 4) || (bits == 8)))
|
||||
return -1 ;
|
||||
|
||||
if ((rows < 0) || (rows > 20))
|
||||
return -1 ;
|
||||
|
||||
if ((cols < 0) || (cols > 20))
|
||||
return -1 ;
|
||||
|
||||
// Create a new LCD:
|
||||
|
||||
for (i = 0 ; i < MAX_LCDS ; ++i)
|
||||
{
|
||||
if (lcds [i] == NULL)
|
||||
{
|
||||
lcdFd = i ;
|
||||
break ;
|
||||
}
|
||||
}
|
||||
|
||||
if (lcdFd == -1)
|
||||
return -1 ;
|
||||
|
||||
lcd = malloc (sizeof (struct lcdDataStruct)) ;
|
||||
if (lcd == NULL)
|
||||
return -1 ;
|
||||
|
||||
lcd->rsPin = rs ;
|
||||
lcd->strbPin = strb ;
|
||||
lcd->bits = 8 ; // For now - we'll set it properly later.
|
||||
lcd->rows = rows ;
|
||||
lcd->cols = cols ;
|
||||
|
||||
lcd->dataPins [0] = d0 ;
|
||||
lcd->dataPins [1] = d1 ;
|
||||
lcd->dataPins [2] = d2 ;
|
||||
lcd->dataPins [3] = d3 ;
|
||||
lcd->dataPins [4] = d4 ;
|
||||
lcd->dataPins [5] = d5 ;
|
||||
lcd->dataPins [6] = d6 ;
|
||||
lcd->dataPins [7] = d7 ;
|
||||
|
||||
lcds [lcdFd] = lcd ;
|
||||
|
||||
digitalWrite (lcd->rsPin, 0) ; pinMode (lcd->rsPin, OUTPUT) ;
|
||||
digitalWrite (lcd->strbPin, 0) ; pinMode (lcd->strbPin, OUTPUT) ;
|
||||
|
||||
for (i = 0 ; i < bits ; ++i)
|
||||
{
|
||||
digitalWrite (lcd->dataPins [i], 0) ;
|
||||
pinMode (lcd->dataPins [i], OUTPUT) ;
|
||||
}
|
||||
delay (35) ; // mS
|
||||
|
||||
|
||||
// 4-bit mode?
|
||||
// OK. This is a PIG and it's not at all obvious from the documentation I had,
|
||||
// so I guess some others have worked through either with better documentation
|
||||
// or more trial and error... Anyway here goes:
|
||||
//
|
||||
// It seems that the controller needs to see the FUNC command at least 3 times
|
||||
// consecutively - in 8-bit mode. If you're only using 8-bit mode, then it appears
|
||||
// that you can get away with one func-set, however I'd not rely on it...
|
||||
//
|
||||
// So to set 4-bit mode, you need to send the commands one nibble at a time,
|
||||
// the same three times, but send the command to set it into 8-bit mode those
|
||||
// three times, then send a final 4th command to set it into 4-bit mode, and only
|
||||
// then can you flip the switch for the rest of the library to work in 4-bit
|
||||
// mode which sends the commands as 2 x 4-bit values.
|
||||
|
||||
if (bits == 4)
|
||||
{
|
||||
func = LCD_FUNC | LCD_FUNC_DL ; // Set 8-bit mode 3 times
|
||||
put4Command (lcd, func >> 4) ; delay (35) ;
|
||||
put4Command (lcd, func >> 4) ; delay (35) ;
|
||||
put4Command (lcd, func >> 4) ; delay (35) ;
|
||||
func = LCD_FUNC ; // 4th set: 4-bit mode
|
||||
put4Command (lcd, func >> 4) ; delay (35) ;
|
||||
lcd->bits = 4 ;
|
||||
}
|
||||
else
|
||||
{
|
||||
func = LCD_FUNC | LCD_FUNC_DL ;
|
||||
putCommand (lcd, func ) ; delay (35) ;
|
||||
putCommand (lcd, func ) ; delay (35) ;
|
||||
putCommand (lcd, func ) ; delay (35) ;
|
||||
}
|
||||
|
||||
if (lcd->rows > 1)
|
||||
{
|
||||
func |= LCD_FUNC_N ;
|
||||
putCommand (lcd, func) ; delay (35) ;
|
||||
}
|
||||
|
||||
// Rest of the initialisation sequence
|
||||
|
||||
putCommand (lcd, LCD_ON_OFF | LCD_ON_OFF_D) ; delay (2) ;
|
||||
putCommand (lcd, LCD_ENTRY | LCD_ENTRY_ID) ; delay (2) ;
|
||||
putCommand (lcd, LCD_CDSHIFT | LCD_CDSHIFT_RL) ; delay (2) ;
|
||||
putCommand (lcd, LCD_CLEAR) ; delay (5) ;
|
||||
|
||||
return lcdFd ;
|
||||
}
|
||||
|
|
@ -0,0 +1,37 @@
|
|||
/*
|
||||
* lcd.h:
|
||||
* Text-based LCD driver.
|
||||
* This is designed to drive the parallel interface LCD drivers
|
||||
* based in the Hitachi HD44780U controller and compatables.
|
||||
*
|
||||
* Copyright (c) 2012 Gordon Henderson.
|
||||
***********************************************************************
|
||||
* This file is part of wiringPi:
|
||||
* https://projects.drogon.net/raspberry-pi/wiringpi/
|
||||
*
|
||||
* wiringPi is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License as published by
|
||||
* the Free Software Foundation, either version 3 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* wiringPi is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public License
|
||||
* along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
|
||||
***********************************************************************
|
||||
*/
|
||||
|
||||
#define MAX_LCDS 8
|
||||
|
||||
extern void lcdHome (int fd) ;
|
||||
extern void lcdClear (int fd) ;
|
||||
extern void lcdPosition (int fd, int x, int y) ;
|
||||
extern void lcdPutchar (int fd, uint8_t data) ;
|
||||
extern void lcdPuts (int fd, char *string) ;
|
||||
extern void lcdPrintf (int fd, char *message, ...) ;
|
||||
|
||||
extern int lcdInit (int rows, int cols, int bits, int rs, int strb,
|
||||
int d0, int d1, int d2, int d3, int d4, int d5, int d6, int d7) ;
|
||||
|
|
@ -0,0 +1,50 @@
|
|||
/*
|
||||
* piHiPri:
|
||||
* Simple way to get your program running at high priority
|
||||
* with realtime schedulling.
|
||||
*
|
||||
* Copyright (c) 2012 Gordon Henderson
|
||||
***********************************************************************
|
||||
* This file is part of wiringPi:
|
||||
* https://projects.drogon.net/raspberry-pi/wiringpi/
|
||||
*
|
||||
* wiringPi is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License as
|
||||
* published by the Free Software Foundation, either version 3 of the
|
||||
* License, or (at your option) any later version.
|
||||
*
|
||||
* wiringPi is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with wiringPi.
|
||||
* If not, see <http://www.gnu.org/licenses/>.
|
||||
***********************************************************************
|
||||
*/
|
||||
|
||||
#include <sched.h>
|
||||
#include <string.h>
|
||||
|
||||
#include "wiringPi.h"
|
||||
|
||||
|
||||
/*
|
||||
* piHiPri:
|
||||
* Attempt to set a high priority schedulling for the running program
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
int piHiPri (int pri)
|
||||
{
|
||||
struct sched_param sched ;
|
||||
|
||||
memset (&sched, 0, sizeof(sched)) ;
|
||||
|
||||
if (pri > sched_get_priority_max (SCHED_RR))
|
||||
pri = sched_get_priority_max (SCHED_RR) ;
|
||||
|
||||
sched.sched_priority = pri ;
|
||||
return sched_setscheduler (0, SCHED_RR, &sched) ;
|
||||
}
|
||||
|
|
@ -0,0 +1,115 @@
|
|||
/*
|
||||
* piNes.c:
|
||||
* Driver for the NES Joystick controller on the Raspberry Pi
|
||||
* Copyright (c) 2012 Gordon Henderson
|
||||
***********************************************************************
|
||||
* This file is part of wiringPi:
|
||||
* https://projects.drogon.net/raspberry-pi/wiringpi/
|
||||
*
|
||||
* wiringPi is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License as
|
||||
* published by the Free Software Foundation, either version 3 of the
|
||||
* License, or (at your option) any later version.
|
||||
*
|
||||
* wiringPi is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with wiringPi.
|
||||
* If not, see <http://www.gnu.org/licenses/>.
|
||||
***********************************************************************
|
||||
*/
|
||||
|
||||
#include <wiringPi.h>
|
||||
|
||||
#include "piNes.h"
|
||||
|
||||
#define MAX_NES_JOYSTICKS 8
|
||||
|
||||
#define NES_RIGHT 0x01
|
||||
#define NES_LEFT 0x02
|
||||
#define NES_DOWN 0x04
|
||||
#define NES_UP 0x08
|
||||
#define NES_START 0x10
|
||||
#define NES_SELECT 0x20
|
||||
#define NES_B 0x40
|
||||
#define NES_A 0x80
|
||||
|
||||
|
||||
// Data to store the pins for each controller
|
||||
|
||||
struct nesPinsStruct
|
||||
{
|
||||
unsigned int cPin, dPin, lPin ;
|
||||
} ;
|
||||
|
||||
static struct nesPinsStruct nesPins [MAX_NES_JOYSTICKS] ;
|
||||
|
||||
static int joysticks = 0 ;
|
||||
|
||||
|
||||
/*
|
||||
* setupNesJoystick:
|
||||
* Create a new NES joystick interface, program the pins, etc.
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
int setupNesJoystick (int dPin, int cPin, int lPin)
|
||||
{
|
||||
if (joysticks == MAX_NES_JOYSTICKS)
|
||||
return -1 ;
|
||||
|
||||
nesPins [joysticks].dPin = dPin ;
|
||||
nesPins [joysticks].cPin = cPin ;
|
||||
nesPins [joysticks].lPin = lPin ;
|
||||
|
||||
digitalWrite (lPin, LOW) ;
|
||||
digitalWrite (cPin, LOW) ;
|
||||
|
||||
pinMode (lPin, OUTPUT) ;
|
||||
pinMode (cPin, OUTPUT) ;
|
||||
pinMode (dPin, INPUT) ;
|
||||
|
||||
return joysticks++ ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* readNesJoystick:
|
||||
* Do a single scan of the NES Joystick.
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
unsigned int readNesJoystick (int joystick)
|
||||
{
|
||||
unsigned int value = 0 ;
|
||||
int i ;
|
||||
|
||||
struct nesPinsStruct *pins = &nesPins [joystick] ;
|
||||
|
||||
// Toggle Latch - which presents the first bit
|
||||
|
||||
digitalWrite (pins->lPin, HIGH) ;
|
||||
delayMicroseconds (1) ;
|
||||
digitalWrite (pins->lPin, LOW) ;
|
||||
delayMicroseconds (1) ;
|
||||
|
||||
// Read first bit
|
||||
|
||||
value = digitalRead (pins->dPin) ;
|
||||
|
||||
// Now get the next 7 bits with the clock
|
||||
|
||||
for (i = 0 ; i < 7 ; ++i)
|
||||
{
|
||||
digitalWrite (pins->cPin, HIGH) ;
|
||||
delayMicroseconds (1) ;
|
||||
digitalWrite (pins->cPin, LOW) ;
|
||||
delayMicroseconds (1) ;
|
||||
value = (value << 1) | digitalRead (pins->dPin) ;
|
||||
}
|
||||
|
||||
return ~value ;
|
||||
}
|
||||
|
|
@ -0,0 +1,37 @@
|
|||
/*
|
||||
* piNes.h:
|
||||
* Driver for the NES Joystick controller on the Raspberry Pi
|
||||
* Copyright (c) 2012 Gordon Henderson
|
||||
***********************************************************************
|
||||
* This file is part of wiringPi:
|
||||
* https://projects.drogon.net/raspberry-pi/wiringpi/
|
||||
*
|
||||
* wiringPi is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License as
|
||||
* published by the Free Software Foundation, either version 3 of the
|
||||
* License, or (at your option) any later version.
|
||||
*
|
||||
* wiringPi is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with wiringPi.
|
||||
* If not, see <http://www.gnu.org/licenses/>.
|
||||
***********************************************************************
|
||||
*/
|
||||
|
||||
#define MAX_NES_JOYSTICKS 8
|
||||
|
||||
#define NES_RIGHT 0x01
|
||||
#define NES_LEFT 0x02
|
||||
#define NES_DOWN 0x04
|
||||
#define NES_UP 0x08
|
||||
#define NES_START 0x10
|
||||
#define NES_SELECT 0x20
|
||||
#define NES_B 0x40
|
||||
#define NES_A 0x80
|
||||
|
||||
extern int setupNesJoystick (int dPin, int cPin, int lPin) ;
|
||||
extern unsigned int readNesJoystick (int joystick) ;
|
||||
|
|
@ -0,0 +1,63 @@
|
|||
/*
|
||||
* piThread.c:
|
||||
* Provide a simplified interface to pthreads
|
||||
*
|
||||
* Copyright (c) 2012 Gordon Henderson
|
||||
***********************************************************************
|
||||
* This file is part of wiringPi:
|
||||
* https://projects.drogon.net/raspberry-pi/wiringpi/
|
||||
*
|
||||
* wiringPi is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License as
|
||||
* published by the Free Software Foundation, either version 3 of the
|
||||
* License, or (at your option) any later version.
|
||||
*
|
||||
* wiringPi is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with wiringPi.
|
||||
* If not, see <http://www.gnu.org/licenses/>.
|
||||
***********************************************************************
|
||||
*/
|
||||
|
||||
#include <pthread.h>
|
||||
#include "wiringPi.h"
|
||||
|
||||
static pthread_mutex_t piMutexes [4] ;
|
||||
|
||||
|
||||
|
||||
/*
|
||||
* piThreadCreate:
|
||||
* Create and start a thread
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
int piThreadCreate (void *(*fn)(void *))
|
||||
{
|
||||
pthread_t myThread ;
|
||||
|
||||
return pthread_create (&myThread, NULL, fn, NULL) ;
|
||||
}
|
||||
|
||||
/*
|
||||
* piLock: piUnlock:
|
||||
* Activate/Deactivate a mutex.
|
||||
* We're keeping things simple here and only tracking 4 mutexes which
|
||||
* is more than enough for out entry-level pthread programming
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void piLock (int key)
|
||||
{
|
||||
pthread_mutex_lock (&piMutexes [key]) ;
|
||||
}
|
||||
|
||||
void piUnlock (int key)
|
||||
{
|
||||
pthread_mutex_unlock (&piMutexes [key]) ;
|
||||
}
|
||||
|
||||
|
|
@ -0,0 +1,981 @@
|
|||
/*
|
||||
* wiringPi:
|
||||
* Arduino compatable (ish) Wiring library for the Raspberry Pi
|
||||
* Copyright (c) 2012 Gordon Henderson
|
||||
*
|
||||
* Thanks to code samples from Gert Jan van Loo and the
|
||||
* BCM2835 ARM Peripherals manual, however it's missing
|
||||
* the clock section /grr/mutter/
|
||||
***********************************************************************
|
||||
* This file is part of wiringPi:
|
||||
* https://projects.drogon.net/raspberry-pi/wiringpi/
|
||||
*
|
||||
* wiringPi is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License as
|
||||
* published by the Free Software Foundation, either version 3 of the
|
||||
* License, or (at your option) any later version.
|
||||
*
|
||||
* wiringPi is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with wiringPi.
|
||||
* If not, see <http://www.gnu.org/licenses/>.
|
||||
***********************************************************************
|
||||
*/
|
||||
|
||||
// Revisions:
|
||||
// 19 Jul 2012:
|
||||
// Moved to the LGPL
|
||||
// Added an abstraction layer to the main routines to save a tiny
|
||||
// bit of run-time and make the clode a little cleaner (if a little
|
||||
// larger)
|
||||
// Added waitForInterrupt code
|
||||
// Added piHiPri code
|
||||
//
|
||||
// 9 Jul 2012:
|
||||
// Added in support to use the /sys/class/gpio interface.
|
||||
// 2 Jul 2012:
|
||||
// Fixed a few more bugs to do with range-checking when in GPIO mode.
|
||||
// 11 Jun 2012:
|
||||
// Fixed some typos.
|
||||
// Added c++ support for the .h file
|
||||
// Added a new function to allow for using my "pin" numbers, or native
|
||||
// GPIO pin numbers.
|
||||
// Removed my busy-loop delay and replaced it with a call to delayMicroseconds
|
||||
//
|
||||
// 02 May 2012:
|
||||
// Added in the 2 UART pins
|
||||
// Change maxPins to numPins to more accurately reflect purpose
|
||||
|
||||
// Pad drive current fiddling
|
||||
|
||||
#undef DEBUG_PADS
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdint.h>
|
||||
#include <poll.h>
|
||||
#include <unistd.h>
|
||||
#include <errno.h>
|
||||
#include <string.h>
|
||||
#include <time.h>
|
||||
#include <fcntl.h>
|
||||
#include <sys/time.h>
|
||||
#include <sys/mman.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/stat.h>
|
||||
|
||||
#include "wiringPi.h"
|
||||
|
||||
// Function stubs
|
||||
|
||||
void (*pinMode) (int pin, int mode) ;
|
||||
void (*pullUpDnControl) (int pin, int pud) ;
|
||||
void (*digitalWrite) (int pin, int value) ;
|
||||
void (*pwmWrite) (int pin, int value) ;
|
||||
void (*setPadDrive) (int group, int value) ;
|
||||
int (*digitalRead) (int pin) ;
|
||||
int (*waitForInterrupt) (int pin, int mS) ;
|
||||
void (*delayMicroseconds) (unsigned int howLong) ;
|
||||
|
||||
|
||||
#ifndef TRUE
|
||||
#define TRUE (1==1)
|
||||
#define FALSE (1==2)
|
||||
#endif
|
||||
|
||||
// BCM Magic
|
||||
|
||||
#define BCM_PASSWORD 0x5A000000
|
||||
|
||||
|
||||
// Port function select bits
|
||||
|
||||
#define FSEL_INPT 0b000
|
||||
#define FSEL_OUTP 0b001
|
||||
#define FSEL_ALT0 0b100
|
||||
#define FSEL_ALT0 0b100
|
||||
#define FSEL_ALT1 0b101
|
||||
#define FSEL_ALT2 0b110
|
||||
#define FSEL_ALT3 0b111
|
||||
#define FSEL_ALT4 0b011
|
||||
#define FSEL_ALT5 0b010
|
||||
|
||||
// Access from ARM Running Linux
|
||||
// Take from Gert/Doms code. Some of this is not in the manual
|
||||
// that I can find )-:
|
||||
|
||||
#define BCM2708_PERI_BASE 0x20000000
|
||||
#define GPIO_PADS (BCM2708_PERI_BASE + 0x100000)
|
||||
#define CLOCK_BASE (BCM2708_PERI_BASE + 0x101000)
|
||||
#define GPIO_BASE (BCM2708_PERI_BASE + 0x200000)
|
||||
#define GPIO_TIMER (BCM2708_PERI_BASE + 0x00B000)
|
||||
#define GPIO_PWM (BCM2708_PERI_BASE + 0x20C000)
|
||||
|
||||
#define PAGE_SIZE (4*1024)
|
||||
#define BLOCK_SIZE (4*1024)
|
||||
|
||||
// PWM
|
||||
|
||||
#define PWM_CONTROL 0
|
||||
#define PWM_STATUS 1
|
||||
#define PWM0_RANGE 4
|
||||
#define PWM0_DATA 5
|
||||
#define PWM1_RANGE 8
|
||||
#define PWM1_DATA 9
|
||||
|
||||
#define PWMCLK_CNTL 40
|
||||
#define PWMCLK_DIV 41
|
||||
|
||||
#define PWM1_MS_MODE 0x8000 // Run in MS mode
|
||||
#define PWM1_USEFIFO 0x2000 // Data from FIFO
|
||||
#define PWM1_REVPOLAR 0x1000 // Reverse polarity
|
||||
#define PWM1_OFFSTATE 0x0800 // Ouput Off state
|
||||
#define PWM1_REPEATFF 0x0400 // Repeat last value if FIFO empty
|
||||
#define PWM1_SERIAL 0x0200 // Run in serial mode
|
||||
#define PWM1_ENABLE 0x0100 // Channel Enable
|
||||
|
||||
#define PWM0_MS_MODE 0x0080 // Run in MS mode
|
||||
#define PWM0_USEFIFO 0x0020 // Data from FIFO
|
||||
#define PWM0_REVPOLAR 0x0010 // Reverse polarity
|
||||
#define PWM0_OFFSTATE 0x0008 // Ouput Off state
|
||||
#define PWM0_REPEATFF 0x0004 // Repeat last value if FIFO empty
|
||||
#define PWM0_SERIAL 0x0002 // Run in serial mode
|
||||
#define PWM0_ENABLE 0x0001 // Channel Enable
|
||||
|
||||
// Timer
|
||||
|
||||
#define TIMER_LOAD (0x400 >> 2)
|
||||
#define TIMER_VALUE (0x404 >> 2)
|
||||
#define TIMER_CONTROL (0x408 >> 2)
|
||||
#define TIMER_IRQ_CLR (0x40C >> 2)
|
||||
#define TIMER_IRQ_RAW (0x410 >> 2)
|
||||
#define TIMER_IRQ_MASK (0x414 >> 2)
|
||||
#define TIMER_RELOAD (0x418 >> 2)
|
||||
#define TIMER_PRE_DIV (0x41C >> 2)
|
||||
#define TIMER_COUNTER (0x420 >> 2)
|
||||
|
||||
// Locals to hold pointers to the hardware
|
||||
|
||||
static volatile uint32_t *gpio ;
|
||||
static volatile uint32_t *pwm ;
|
||||
static volatile uint32_t *clk ;
|
||||
static volatile uint32_t *pads ;
|
||||
static volatile uint32_t *timer ;
|
||||
|
||||
static volatile uint32_t *timerIrqRaw ;
|
||||
|
||||
// The BCM2835 has 54 GPIO pins.
|
||||
// BCM2835 data sheet, Page 90 onwards.
|
||||
// There are 6 control registers, each control the functions of a block
|
||||
// of 10 pins.
|
||||
// Each control register has 10 sets of 3 bits per GPIO pin:
|
||||
//
|
||||
// 000 = GPIO Pin X is an input
|
||||
// 001 = GPIO Pin X is an output
|
||||
// 100 = GPIO Pin X takes alternate function 0
|
||||
// 101 = GPIO Pin X takes alternate function 1
|
||||
// 110 = GPIO Pin X takes alternate function 2
|
||||
// 111 = GPIO Pin X takes alternate function 3
|
||||
// 011 = GPIO Pin X takes alternate function 4
|
||||
// 010 = GPIO Pin X takes alternate function 5
|
||||
//
|
||||
// So the 3 bits for port X are:
|
||||
// X / 10 + ((X % 10) * 3)
|
||||
|
||||
// sysFds:
|
||||
// Map a file descriptor from the /sys/class/gpio/gpioX/value
|
||||
|
||||
static int sysFds [64] ;
|
||||
|
||||
// Doing it the Arduino way with lookup tables...
|
||||
// Yes, it's probably more innefficient than all the bit-twidling, but it
|
||||
// does tend to make it all a bit clearer. At least to me!
|
||||
|
||||
// pinToGpio:
|
||||
// Take a Wiring pin (0 through X) and re-map it to the BCM_GPIO pin
|
||||
|
||||
static int pinToGpio [64] =
|
||||
{
|
||||
17, 18, 21, 22, 23, 24, 25, 4, // From the Original Wiki - GPIO 0 through 7
|
||||
0, 1, // I2C - SDA0, SCL0
|
||||
8, 7, // SPI - CE1, CE0
|
||||
10, 9, 11, // SPI - MOSI, MISO, SCLK
|
||||
14, 15, // UART - Tx, Rx
|
||||
|
||||
// Padding:
|
||||
|
||||
-1, -1, -1,-1,-1,-1,-1, -1, -1, -1, -1, -1, -1, -1, -1, // ... 31
|
||||
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // ... 47
|
||||
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // ... 63
|
||||
} ;
|
||||
|
||||
// gpioToGPFSEL:
|
||||
// Map a BCM_GPIO pin to it's control port. (GPFSEL 0-5)
|
||||
|
||||
static uint8_t gpioToGPFSEL [] =
|
||||
{
|
||||
0,0,0,0,0,0,0,0,0,0,
|
||||
1,1,1,1,1,1,1,1,1,1,
|
||||
2,2,2,2,2,2,2,2,2,2,
|
||||
3,3,3,3,3,3,3,3,3,3,
|
||||
4,4,4,4,4,4,4,4,4,4,
|
||||
5,5,5,5,5,5,5,5,5,5,
|
||||
} ;
|
||||
|
||||
// gpioToShift
|
||||
// Define the shift up for the 3 bits per pin in each GPFSEL port
|
||||
|
||||
static uint8_t gpioToShift [] =
|
||||
{
|
||||
0,3,6,9,12,15,18,21,24,27,
|
||||
0,3,6,9,12,15,18,21,24,27,
|
||||
0,3,6,9,12,15,18,21,24,27,
|
||||
0,3,6,9,12,15,18,21,24,27,
|
||||
0,3,6,9,12,15,18,21,24,27,
|
||||
} ;
|
||||
|
||||
// gpioToGPSET:
|
||||
// (Word) offset to the GPIO Set registers for each GPIO pin
|
||||
|
||||
static uint8_t gpioToGPSET [] =
|
||||
{
|
||||
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
|
||||
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||||
} ;
|
||||
|
||||
// gpioToGPCLR:
|
||||
// (Word) offset to the GPIO Clear registers for each GPIO pin
|
||||
|
||||
static uint8_t gpioToGPCLR [] =
|
||||
{
|
||||
10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,
|
||||
11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,
|
||||
} ;
|
||||
|
||||
// gpioToGPLEV:
|
||||
// (Word) offset to the GPIO Input level registers for each GPIO pin
|
||||
|
||||
static uint8_t gpioToGPLEV [] =
|
||||
{
|
||||
13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,
|
||||
14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,
|
||||
} ;
|
||||
|
||||
#ifdef notYetReady
|
||||
// gpioToEDS
|
||||
// (Word) offset to the Event Detect Status
|
||||
|
||||
static uint8_t gpioToEDS [] =
|
||||
{
|
||||
16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
|
||||
17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,
|
||||
} ;
|
||||
|
||||
// gpioToREN
|
||||
// (Word) offset to the Rising edgde ENable register
|
||||
|
||||
static uint8_t gpioToREN [] =
|
||||
{
|
||||
19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,
|
||||
20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,
|
||||
} ;
|
||||
|
||||
// gpioToFEN
|
||||
// (Word) offset to the Falling edgde ENable register
|
||||
|
||||
static uint8_t gpioToFEN [] =
|
||||
{
|
||||
22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,
|
||||
23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,
|
||||
} ;
|
||||
#endif
|
||||
|
||||
// gpioToPUDCLK
|
||||
// (Word) offset to the Pull Up Down Clock regsiter
|
||||
|
||||
#define GPPUD 37
|
||||
|
||||
static uint8_t gpioToPUDCLK [] =
|
||||
{
|
||||
38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,
|
||||
39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,
|
||||
} ;
|
||||
|
||||
// gpioToPwmALT
|
||||
// the ALT value to put a GPIO pin into PWM mode
|
||||
|
||||
static uint8_t gpioToPwmALT [] =
|
||||
{
|
||||
0, 0, 0, 0, 0, 0, 0, 0, // 0 -> 7
|
||||
0, 0, 0, 0, FSEL_ALT0, FSEL_ALT0, 0, 0, // 8 -> 15
|
||||
0, 0, FSEL_ALT5, FSEL_ALT5, 0, 0, 0, 0, // 16 -> 23
|
||||
0, 0, 0, 0, 0, 0, 0, 0, // 24 -> 31
|
||||
0, 0, 0, 0, 0, 0, 0, 0, // 32 -> 39
|
||||
FSEL_ALT0, FSEL_ALT0, 0, 0, 0, FSEL_ALT0, 0, 0, // 40 -> 47
|
||||
0, 0, 0, 0, 0, 0, 0, 0, // 48 -> 55
|
||||
0, 0, 0, 0, 0, 0, 0, 0, // 56 -> 63
|
||||
} ;
|
||||
|
||||
static uint8_t gpioToPwmPort [] =
|
||||
{
|
||||
0, 0, 0, 0, 0, 0, 0, 0, // 0 -> 7
|
||||
0, 0, 0, 0, PWM0_DATA, PWM1_DATA, 0, 0, // 8 -> 15
|
||||
0, 0, PWM0_DATA, PWM1_DATA, 0, 0, 0, 0, // 16 -> 23
|
||||
0, 0, 0, 0, 0, 0, 0, 0, // 24 -> 31
|
||||
0, 0, 0, 0, 0, 0, 0, 0, // 32 -> 39
|
||||
PWM0_DATA, PWM1_DATA, 0, 0, 0, PWM1_DATA, 0, 0, // 40 -> 47
|
||||
0, 0, 0, 0, 0, 0, 0, 0, // 48 -> 55
|
||||
0, 0, 0, 0, 0, 0, 0, 0, // 56 -> 63
|
||||
|
||||
} ;
|
||||
|
||||
|
||||
// Time for easy calculations
|
||||
|
||||
static unsigned long long epoch ;
|
||||
|
||||
//////////////////////////////////////////////////////////////////////////////////
|
||||
|
||||
|
||||
/*
|
||||
* pinMode:
|
||||
* Sets the mode of a pin to be input, output or PWM output
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void pinModeGpio (int pin, int mode)
|
||||
{
|
||||
static int pwmRunning = FALSE ;
|
||||
int fSel, shift, alt ;
|
||||
|
||||
pin &= 63 ;
|
||||
|
||||
fSel = gpioToGPFSEL [pin] ;
|
||||
shift = gpioToShift [pin] ;
|
||||
|
||||
/**/ if (mode == INPUT)
|
||||
*(gpio + fSel) = (*(gpio + fSel) & ~(7 << shift)) ; // Sets bits to zero = input
|
||||
else if (mode == OUTPUT)
|
||||
*(gpio + fSel) = (*(gpio + fSel) & ~(7 << shift)) | (1 << shift) ;
|
||||
else if (mode == PWM_OUTPUT)
|
||||
{
|
||||
if ((alt = gpioToPwmALT [pin]) == 0) // Not a PWM pin
|
||||
return ;
|
||||
|
||||
// Set pin to PWM mode
|
||||
|
||||
*(gpio + fSel) = (*(gpio + fSel) & ~(7 << shift)) | (alt << shift) ;
|
||||
|
||||
// We didn't initialise the PWM hardware at setup time - because it's possible that
|
||||
// something else is using the PWM - e.g. the Audio systems! So if we use PWM
|
||||
// here, then we're assuming that nothing else is, otherwise things are going
|
||||
// to sound a bit funny...
|
||||
|
||||
if (!pwmRunning)
|
||||
{
|
||||
|
||||
// Gert/Doms Values
|
||||
*(clk + PWMCLK_DIV) = BCM_PASSWORD | (32<<12) ; // set pwm div to 32 (19.2/3 = 600KHz)
|
||||
*(clk + PWMCLK_CNTL) = BCM_PASSWORD | 0x11 ; // Source=osc and enable
|
||||
digitalWrite (pin, LOW) ;
|
||||
*(pwm + PWM_CONTROL) = 0 ; // Disable PWM
|
||||
delayMicroseconds (10) ;
|
||||
*(pwm + PWM0_RANGE) = 0x400 ;
|
||||
delayMicroseconds (10) ;
|
||||
*(pwm + PWM1_RANGE) = 0x400 ;
|
||||
delayMicroseconds (10) ;
|
||||
|
||||
// Enable PWMs
|
||||
|
||||
*(pwm + PWM0_DATA) = 512 ;
|
||||
*(pwm + PWM1_DATA) = 512 ;
|
||||
|
||||
*(pwm + PWM_CONTROL) = PWM0_ENABLE | PWM1_ENABLE ;
|
||||
|
||||
pwmRunning = TRUE ;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
// When we change mode of any pin, we remove the pull up/downs
|
||||
|
||||
pullUpDnControl (pin, PUD_OFF) ;
|
||||
}
|
||||
|
||||
void pinModeWPi (int pin, int mode)
|
||||
{
|
||||
pinModeGpio (pinToGpio [pin & 63], mode) ;
|
||||
}
|
||||
|
||||
void pinModeSys (int pin, int mode)
|
||||
{
|
||||
return ;
|
||||
}
|
||||
|
||||
|
||||
#ifdef notYetReady
|
||||
/*
|
||||
* pinED01:
|
||||
* pinED10:
|
||||
* Enables edge-detect mode on a pin - from a 0 to a 1 or 1 to 0
|
||||
* Pin must already be in input mode with appropriate pull up/downs set.
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void pinEnableED01Pi (int pin)
|
||||
{
|
||||
pin = pinToGpio [pin & 63] ;
|
||||
}
|
||||
#endif
|
||||
|
||||
|
||||
|
||||
/*
|
||||
* digitalWrite:
|
||||
* Set an output bit
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void digitalWriteWPi (int pin, int value)
|
||||
{
|
||||
pin = pinToGpio [pin & 63] ;
|
||||
|
||||
if (value == LOW)
|
||||
*(gpio + gpioToGPCLR [pin]) = 1 << (pin & 31) ;
|
||||
else
|
||||
*(gpio + gpioToGPSET [pin]) = 1 << (pin & 31) ;
|
||||
}
|
||||
|
||||
void digitalWriteGpio (int pin, int value)
|
||||
{
|
||||
pin &= 63 ;
|
||||
|
||||
if (value == LOW)
|
||||
*(gpio + gpioToGPCLR [pin]) = 1 << (pin & 31) ;
|
||||
else
|
||||
*(gpio + gpioToGPSET [pin]) = 1 << (pin & 31) ;
|
||||
}
|
||||
|
||||
void digitalWriteSys (int pin, int value)
|
||||
{
|
||||
pin &= 63 ;
|
||||
|
||||
if (sysFds [pin] != -1)
|
||||
{
|
||||
if (value == LOW)
|
||||
write (sysFds [pin], "0\n", 2) ;
|
||||
else
|
||||
write (sysFds [pin], "1\n", 2) ;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* pwnWrite:
|
||||
* Set an output PWM value
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void pwmWriteWPi (int pin, int value)
|
||||
{
|
||||
int port ;
|
||||
|
||||
pin = pinToGpio [pin & 63] ;
|
||||
port = gpioToPwmPort [pin] ;
|
||||
|
||||
*(pwm + port) = value & 0x3FF ;
|
||||
}
|
||||
|
||||
void pwmWriteGpio (int pin, int value)
|
||||
{
|
||||
int port ;
|
||||
|
||||
pin = pin & 63 ;
|
||||
port = gpioToPwmPort [pin] ;
|
||||
|
||||
*(pwm + port) = value & 0x3FF ;
|
||||
}
|
||||
|
||||
void pwmWriteSys (int pin, int value)
|
||||
{
|
||||
return ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* setPadDrive:
|
||||
* Set the PAD driver value
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void setPadDriveWPi (int group, int value)
|
||||
{
|
||||
uint32_t wrVal ;
|
||||
|
||||
if ((group < 0) || (group > 2))
|
||||
return ;
|
||||
|
||||
wrVal = BCM_PASSWORD | 0x18 | (value & 7) ;
|
||||
*(pads + group + 11) = wrVal ;
|
||||
|
||||
#ifdef DEBUG_PADS
|
||||
printf ("setPadDrive: Group: %d, value: %d (%08X)\n", group, value, wrVal) ;
|
||||
printf ("Read : %08X\n", *(pads + group + 11)) ;
|
||||
#endif
|
||||
}
|
||||
|
||||
void setPadDriveGpio (int group, int value)
|
||||
{
|
||||
setPadDriveWPi (group, value) ;
|
||||
}
|
||||
|
||||
void setPadDriveSys (int group, int value)
|
||||
{
|
||||
return ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* digitalRead:
|
||||
* Read the value of a given Pin, returning HIGH or LOW
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
int digitalReadWPi (int pin)
|
||||
{
|
||||
pin = pinToGpio [pin & 63] ;
|
||||
|
||||
if ((*(gpio + gpioToGPLEV [pin]) & (1 << (pin & 31))) != 0)
|
||||
return HIGH ;
|
||||
else
|
||||
return LOW ;
|
||||
}
|
||||
|
||||
int digitalReadGpio (int pin)
|
||||
{
|
||||
pin &= 63 ;
|
||||
|
||||
if ((*(gpio + gpioToGPLEV [pin]) & (1 << (pin & 31))) != 0)
|
||||
return HIGH ;
|
||||
else
|
||||
return LOW ;
|
||||
}
|
||||
|
||||
int digitalReadSys (int pin)
|
||||
{
|
||||
char c ;
|
||||
|
||||
pin &= 63 ;
|
||||
|
||||
if (sysFds [pin] == -1)
|
||||
return 0 ;
|
||||
|
||||
lseek (sysFds [pin], 0L, SEEK_SET) ;
|
||||
read (sysFds [pin], &c, 1) ;
|
||||
return (c == '0') ? 0 : 1 ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* pullUpDownCtrl:
|
||||
* Control the internal pull-up/down resistors on a GPIO pin
|
||||
* The Arduino only has pull-ups and these are enabled by writing 1
|
||||
* to a port when in input mode - this paradigm doesn't quite apply
|
||||
* here though.
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void pullUpDnControlWPi (int pin, int pud)
|
||||
{
|
||||
pin = pinToGpio [pin & 63] ;
|
||||
pud &= 3 ;
|
||||
|
||||
*(gpio + GPPUD) = pud ; delayMicroseconds (10) ;
|
||||
*(gpio + gpioToPUDCLK [pin]) = 1 << (pin & 31) ; delayMicroseconds (10) ;
|
||||
|
||||
*(gpio + GPPUD) = 0 ;
|
||||
*(gpio + gpioToPUDCLK [pin]) = 0 ;
|
||||
}
|
||||
|
||||
void pullUpDnControlGpio (int pin, int pud)
|
||||
{
|
||||
pin &= 63 ;
|
||||
pud &= 3 ;
|
||||
|
||||
*(gpio + GPPUD) = pud ; delayMicroseconds (10) ;
|
||||
*(gpio + gpioToPUDCLK [pin]) = 1 << (pin & 31) ; delayMicroseconds (10) ;
|
||||
|
||||
*(gpio + GPPUD) = 0 ;
|
||||
*(gpio + gpioToPUDCLK [pin]) = 0 ;
|
||||
}
|
||||
|
||||
void pullUpDnControlSys (int pin, int pud)
|
||||
{
|
||||
return ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* waitForInterrupt:
|
||||
* Wait for Interrupt on a GPIO pin.
|
||||
* This is actually done via the /sys/class/gpio interface regardless of
|
||||
* the wiringPi access mode in-use. Maybe sometime it might get a better
|
||||
* way for a bit more efficiency.
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
int waitForInterruptSys (int pin, int mS)
|
||||
{
|
||||
int fd, x ;
|
||||
char buf [8] ;
|
||||
struct pollfd polls ;
|
||||
|
||||
if ((fd = sysFds [pin & 63]) == -1)
|
||||
return -2 ;
|
||||
|
||||
// Do a dummy read
|
||||
|
||||
x = read (fd, buf, 6) ;
|
||||
if (x < 0)
|
||||
return x ;
|
||||
|
||||
// And seek
|
||||
|
||||
lseek (fd, 0, SEEK_SET) ;
|
||||
|
||||
// Setup poll structure
|
||||
|
||||
polls.fd = fd ;
|
||||
polls.events = POLLPRI ; // Urgent data!
|
||||
|
||||
// Wait for it ...
|
||||
|
||||
return poll (&polls, 1, mS) ;
|
||||
}
|
||||
|
||||
int waitForInterruptWPi (int pin, int mS)
|
||||
{
|
||||
return waitForInterruptSys (pinToGpio [pin & 63], mS) ;
|
||||
}
|
||||
|
||||
int waitForInterruptGpio (int pin, int mS)
|
||||
{
|
||||
return waitForInterruptSys (pin, mS) ;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
/*
|
||||
* delay:
|
||||
* Wait for some number of milli seconds
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void delay (unsigned int howLong)
|
||||
{
|
||||
struct timespec sleeper, dummy ;
|
||||
|
||||
sleeper.tv_sec = (time_t)(howLong / 1000) ;
|
||||
sleeper.tv_nsec = (long)(howLong % 1000) * 1000000 ;
|
||||
|
||||
nanosleep (&sleeper, &dummy) ;
|
||||
}
|
||||
|
||||
/*
|
||||
* delayMicroseconds:
|
||||
* This is somewhat intersting. It seems that on the Pi, a single call
|
||||
* to nanosleep takes some 80 to 130 microseconds anyway, so while
|
||||
* obeying the standards (may take longer), it's not always what we
|
||||
* want!
|
||||
*
|
||||
* So what I'll do now is if the delay is less than 100uS we'll do it
|
||||
* in a hard loop, watching a built-in counter on the ARM chip. This is
|
||||
* somewhat sub-optimal in that it uses 100% CPU, something not an issue
|
||||
* in a microcontroller, but under a multi-tasking, multi-user OS, it's
|
||||
* wastefull, however we've no real choice )-:
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void delayMicrosecondsSys (unsigned int howLong)
|
||||
{
|
||||
struct timespec sleeper, dummy ;
|
||||
|
||||
sleeper.tv_sec = 0 ;
|
||||
sleeper.tv_nsec = (long)(howLong * 1000) ;
|
||||
|
||||
nanosleep (&sleeper, &dummy) ;
|
||||
}
|
||||
|
||||
void delayMicrosecondsHard (unsigned int howLong)
|
||||
{
|
||||
*(timer + TIMER_LOAD) = howLong ;
|
||||
*(timer + TIMER_IRQ_CLR) = 0 ;
|
||||
|
||||
while (*timerIrqRaw == 0)
|
||||
;
|
||||
}
|
||||
|
||||
void delayMicrosecondsWPi (unsigned int howLong)
|
||||
{
|
||||
struct timespec sleeper, dummy ;
|
||||
|
||||
/**/ if (howLong == 0)
|
||||
return ;
|
||||
else if (howLong < 100)
|
||||
delayMicrosecondsHard (howLong) ;
|
||||
else
|
||||
{
|
||||
sleeper.tv_sec = 0 ;
|
||||
sleeper.tv_nsec = (long)(howLong * 1000) ;
|
||||
nanosleep (&sleeper, &dummy) ;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* millis:
|
||||
* Return a number of milliseconds as an unsigned int.
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
unsigned int millis (void)
|
||||
{
|
||||
struct timeval tv ;
|
||||
unsigned long long t1 ;
|
||||
|
||||
gettimeofday (&tv, NULL) ;
|
||||
|
||||
t1 = (tv.tv_sec * 1000000 + tv.tv_usec) / 1000 ;
|
||||
|
||||
return (uint32_t)(t1 - epoch) ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* wiringPiSetup:
|
||||
* Must be called once at the start of your program execution.
|
||||
*
|
||||
* Default setup: Initialises the system into wiringPi Pin mode and uses the
|
||||
* memory mapped hardware directly.
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
int wiringPiSetup (void)
|
||||
{
|
||||
int fd ;
|
||||
uint8_t *gpioMem, *pwmMem, *clkMem, *padsMem, *timerMem ;
|
||||
struct timeval tv ;
|
||||
|
||||
pinMode = pinModeWPi ;
|
||||
pullUpDnControl = pullUpDnControlWPi ;
|
||||
digitalWrite = digitalWriteWPi ;
|
||||
pwmWrite = pwmWriteWPi ;
|
||||
setPadDrive = setPadDriveWPi ;
|
||||
digitalRead = digitalReadWPi ;
|
||||
waitForInterrupt = waitForInterruptWPi ;
|
||||
delayMicroseconds = delayMicrosecondsWPi ;
|
||||
|
||||
// Open the master /dev/memory device
|
||||
|
||||
if ((fd = open ("/dev/mem", O_RDWR | O_SYNC) ) < 0)
|
||||
{
|
||||
fprintf (stderr, "wiringPiSetup: Unable to open /dev/mem: %s\n", strerror (errno)) ;
|
||||
return -1 ;
|
||||
}
|
||||
|
||||
// GPIO:
|
||||
|
||||
// Allocate 2 pages - 1 ...
|
||||
|
||||
if ((gpioMem = malloc (BLOCK_SIZE + (PAGE_SIZE-1))) == NULL)
|
||||
{
|
||||
fprintf (stderr, "wiringPiSetup: malloc failed: %s\n", strerror (errno)) ;
|
||||
return -1 ;
|
||||
}
|
||||
|
||||
// ... presumably to make sure we can round it up to a whole page size
|
||||
|
||||
if (((uint32_t)gpioMem % PAGE_SIZE) != 0)
|
||||
gpioMem += PAGE_SIZE - ((uint32_t)gpioMem % PAGE_SIZE) ;
|
||||
|
||||
gpio = (uint32_t *)mmap((caddr_t)gpioMem, BLOCK_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED, fd, GPIO_BASE) ;
|
||||
|
||||
if ((int32_t)gpio < 0)
|
||||
{
|
||||
fprintf (stderr, "wiringPiSetup: mmap failed: %s\n", strerror (errno)) ;
|
||||
return -1 ;
|
||||
}
|
||||
|
||||
// PWM
|
||||
|
||||
if ((pwmMem = malloc (BLOCK_SIZE + (PAGE_SIZE-1))) == NULL)
|
||||
{
|
||||
fprintf (stderr, "wiringPiSetup: pwmMem malloc failed: %s\n", strerror (errno)) ;
|
||||
return -1 ;
|
||||
}
|
||||
|
||||
if (((uint32_t)pwmMem % PAGE_SIZE) != 0)
|
||||
pwmMem += PAGE_SIZE - ((uint32_t)pwmMem % PAGE_SIZE) ;
|
||||
|
||||
pwm = (uint32_t *)mmap(pwmMem, BLOCK_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED, fd, GPIO_PWM) ;
|
||||
|
||||
if ((int32_t)pwm < 0)
|
||||
{
|
||||
fprintf (stderr, "wiringPiSetup: mmap failed (pwm): %s\n", strerror (errno)) ;
|
||||
return -1 ;
|
||||
}
|
||||
|
||||
// Clock control (needed for PWM)
|
||||
|
||||
if ((clkMem = malloc (BLOCK_SIZE + (PAGE_SIZE-1))) == NULL)
|
||||
{
|
||||
fprintf (stderr, "wiringPiSetup: clkMem malloc failed: %s\n", strerror (errno)) ;
|
||||
return -1 ;
|
||||
}
|
||||
|
||||
if (((uint32_t)clkMem % PAGE_SIZE) != 0)
|
||||
clkMem += PAGE_SIZE - ((uint32_t)clkMem % PAGE_SIZE) ;
|
||||
|
||||
clk = (uint32_t *)mmap(clkMem, BLOCK_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED, fd, CLOCK_BASE) ;
|
||||
|
||||
if ((int32_t)clk < 0)
|
||||
{
|
||||
fprintf (stderr, "wiringPiSetup: mmap failed (clk): %s\n", strerror (errno)) ;
|
||||
return -1 ;
|
||||
}
|
||||
|
||||
// The drive pads
|
||||
|
||||
if ((padsMem = malloc (BLOCK_SIZE + (PAGE_SIZE-1))) == NULL)
|
||||
{
|
||||
fprintf (stderr, "wiringPiSetup: padsMem malloc failed: %s\n", strerror (errno)) ;
|
||||
return -1 ;
|
||||
}
|
||||
|
||||
if (((uint32_t)padsMem % PAGE_SIZE) != 0)
|
||||
padsMem += PAGE_SIZE - ((uint32_t)padsMem % PAGE_SIZE) ;
|
||||
|
||||
pads = (uint32_t *)mmap(padsMem, BLOCK_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED, fd, GPIO_PADS) ;
|
||||
|
||||
if ((int32_t)pads < 0)
|
||||
{
|
||||
fprintf (stderr, "wiringPiSetup: mmap failed (pads): %s\n", strerror (errno)) ;
|
||||
return -1 ;
|
||||
}
|
||||
|
||||
#ifdef DEBUG_PADS
|
||||
printf ("Checking pads @ 0x%08X\n", (unsigned int)pads) ;
|
||||
printf (" -> %08X %08X %08X\n", *(pads + 11), *(pads + 12), *(pads + 13)) ;
|
||||
#endif
|
||||
|
||||
// The system timer
|
||||
|
||||
if ((timerMem = malloc (BLOCK_SIZE + (PAGE_SIZE-1))) == NULL)
|
||||
{
|
||||
fprintf (stderr, "wiringPiSetup: timerMem malloc failed: %s\n", strerror (errno)) ;
|
||||
return -1 ;
|
||||
}
|
||||
|
||||
if (((uint32_t)timerMem % PAGE_SIZE) != 0)
|
||||
timerMem += PAGE_SIZE - ((uint32_t)timerMem % PAGE_SIZE) ;
|
||||
|
||||
timer = (uint32_t *)mmap(timerMem, BLOCK_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED, fd, GPIO_TIMER) ;
|
||||
|
||||
if ((int32_t)timer < 0)
|
||||
{
|
||||
fprintf (stderr, "wiringPiSetup: mmap failed (timer): %s\n", strerror (errno)) ;
|
||||
return -1 ;
|
||||
}
|
||||
|
||||
// Set the timer to free-running, 1MHz.
|
||||
// 0xF9 is 249, the timer divide is base clock / (divide+1)
|
||||
// so base clock is 250MHz / 250 = 1MHz.
|
||||
|
||||
*(timer + TIMER_CONTROL) = 0x0000280 ;
|
||||
*(timer + TIMER_PRE_DIV) = 0x00000F9 ;
|
||||
timerIrqRaw = timer + TIMER_IRQ_RAW ;
|
||||
|
||||
// Initialise our epoch for millis()
|
||||
|
||||
gettimeofday (&tv, NULL) ;
|
||||
epoch = (tv.tv_sec * 1000000 + tv.tv_usec) / 1000 ;
|
||||
|
||||
return 0 ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* wiringPiSetupGpio:
|
||||
* Must be called once at the start of your program execution.
|
||||
*
|
||||
* GPIO setup: Initialises the system into GPIO Pin mode and uses the
|
||||
* memory mapped hardware directly.
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
int wiringPiSetupGpio (void)
|
||||
{
|
||||
int x = wiringPiSetup () ;
|
||||
|
||||
if (x != 0)
|
||||
return x ;
|
||||
|
||||
pinMode = pinModeGpio ;
|
||||
pullUpDnControl = pullUpDnControlGpio ;
|
||||
digitalWrite = digitalWriteGpio ;
|
||||
pwmWrite = pwmWriteGpio ;
|
||||
setPadDrive = setPadDriveGpio ;
|
||||
digitalRead = digitalReadGpio ;
|
||||
waitForInterrupt = waitForInterruptGpio ;
|
||||
delayMicroseconds = delayMicrosecondsWPi ; // Same
|
||||
|
||||
return 0 ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* wiringPiSetupSys:
|
||||
* Must be called once at the start of your program execution.
|
||||
*
|
||||
* Initialisation (again), however this time we are using the /sys/class/gpio
|
||||
* interface to the GPIO systems - slightly slower, but always usable as
|
||||
* a non-root user, assuming the devices are already exported and setup correctly.
|
||||
*/
|
||||
|
||||
int wiringPiSetupSys (void)
|
||||
{
|
||||
int pin ;
|
||||
struct timeval tv ;
|
||||
char fName [128] ;
|
||||
|
||||
pinMode = pinModeSys ;
|
||||
pullUpDnControl = pullUpDnControlSys ;
|
||||
digitalWrite = digitalWriteSys ;
|
||||
pwmWrite = pwmWriteSys ;
|
||||
setPadDrive = setPadDriveSys ;
|
||||
digitalRead = digitalReadSys ;
|
||||
waitForInterrupt = waitForInterruptSys ;
|
||||
delayMicroseconds = delayMicrosecondsSys ;
|
||||
|
||||
// Open and scan the directory, looking for exported GPIOs, and pre-open
|
||||
// the 'value' interface to speed things up for later
|
||||
|
||||
for (pin = 0 ; pin < 64 ; ++pin)
|
||||
{
|
||||
sprintf (fName, "/sys/class/gpio/gpio%d/value", pin) ;
|
||||
sysFds [pin] = open (fName, O_RDWR) ;
|
||||
}
|
||||
|
||||
// Initialise the epoch for mills() ...
|
||||
|
||||
gettimeofday (&tv, NULL) ;
|
||||
epoch = (tv.tv_sec * 1000000 + tv.tv_usec) / 1000 ;
|
||||
|
||||
return 0 ;
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -0,0 +1,95 @@
|
|||
/*
|
||||
* wiringPi:
|
||||
* Arduino compatable (ish) Wiring library for the Raspberry Pi
|
||||
* Copyright (c) 2012 Gordon Henderson
|
||||
***********************************************************************
|
||||
* This file is part of wiringPi:
|
||||
* https://projects.drogon.net/raspberry-pi/wiringpi/
|
||||
*
|
||||
* wiringPi is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License as published by
|
||||
* the Free Software Foundation, either version 3 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* wiringPi is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public License
|
||||
* along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
|
||||
***********************************************************************
|
||||
*/
|
||||
|
||||
// Handy defines
|
||||
|
||||
#define NUM_PINS 17
|
||||
|
||||
#define WPI_MODE_PINS 0
|
||||
#define WPI_MODE_GPIO 1
|
||||
#define WPI_MODE_GPIO_SYS 2
|
||||
#define WPI_MODE_PIFACE 3
|
||||
|
||||
#define INPUT 0
|
||||
#define OUTPUT 1
|
||||
#define PWM_OUTPUT 2
|
||||
|
||||
#define LOW 0
|
||||
#define HIGH 1
|
||||
|
||||
#define PUD_OFF 0
|
||||
#define PUD_DOWN 1
|
||||
#define PUD_UP 2
|
||||
|
||||
// Function prototypes
|
||||
// c++ wrappers thanks to a commend by Nick Lott
|
||||
// (and others on the Raspberry Pi forums)
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
// Basic wiringPi functions
|
||||
|
||||
extern int wiringPiSetup (void) ;
|
||||
extern int wiringPiSetupSys (void) ;
|
||||
extern int wiringPiSetupGpio (void) ;
|
||||
extern int wiringPiSetupPiFace (void) ;
|
||||
|
||||
extern int wiringPiSetupPiFaceForGpioProg (void) ; // Don't use this - for gpio program only
|
||||
|
||||
extern void (*pinMode) (int pin, int mode) ;
|
||||
extern void (*pullUpDnControl) (int pin, int pud) ;
|
||||
extern void (*digitalWrite) (int pin, int value) ;
|
||||
extern void (*pwmWrite) (int pin, int value) ;
|
||||
extern void (*setPadDrive) (int group, int value) ;
|
||||
extern int (*digitalRead) (int pin) ;
|
||||
extern void (*delayMicroseconds) (unsigned int howLong) ;
|
||||
|
||||
// Interrupts
|
||||
|
||||
extern int (*waitForInterrupt) (int pin, int mS) ;
|
||||
|
||||
// Threads
|
||||
|
||||
#define PI_THREAD(X) void *X (void *dummy)
|
||||
|
||||
extern int piThreadCreate (void *(*fn)(void *)) ;
|
||||
extern void piLock (int key) ;
|
||||
extern void piUnlock (int key) ;
|
||||
|
||||
// Schedulling priority
|
||||
|
||||
extern int piHiPri (int pri) ;
|
||||
|
||||
|
||||
// Extras from arduino land
|
||||
|
||||
extern void delay (unsigned int howLong) ;
|
||||
//extern void delayMicroseconds (unsigned int howLong) ;
|
||||
//extern void delayMicrosecondsHard (unsigned int howLong) ;
|
||||
extern unsigned int millis (void) ;
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
|
@ -0,0 +1,355 @@
|
|||
/*
|
||||
* wiringPiFace:
|
||||
* Arduino compatable (ish) Wiring library for the Raspberry Pi
|
||||
* Copyright (c) 2012 Gordon Henderson
|
||||
*
|
||||
* This file to interface with the PiFace peripheral device which
|
||||
* has an MCP23S17 GPIO device connected via the SPI bus.
|
||||
*
|
||||
***********************************************************************
|
||||
* This file is part of wiringPi:
|
||||
* https://projects.drogon.net/raspberry-pi/wiringpi/
|
||||
*
|
||||
* wiringPi is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License as
|
||||
* published by the Free Software Foundation, either version 3 of the
|
||||
* License, or (at your option) any later version.
|
||||
*
|
||||
* wiringPi is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with wiringPi.
|
||||
* If not, see <http://www.gnu.org/licenses/>.
|
||||
***********************************************************************
|
||||
*/
|
||||
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdint.h>
|
||||
#include <fcntl.h>
|
||||
#include <sys/ioctl.h>
|
||||
#include <sys/types.h>
|
||||
#include <linux/spi/spidev.h>
|
||||
|
||||
#include "wiringPi.h"
|
||||
|
||||
|
||||
// The SPI bus parameters
|
||||
// Variables as they need to be passed as pointers later on
|
||||
|
||||
static char *spiDevice = "/dev/spidev0.0" ;
|
||||
static uint8_t spiMode = 0 ;
|
||||
static uint8_t spiBPW = 8 ;
|
||||
static uint32_t spiSpeed = 5000000 ;
|
||||
static uint16_t spiDelay = 0;
|
||||
|
||||
// Locals here to keep track of everything
|
||||
|
||||
static int spiFd ;
|
||||
|
||||
// The MCP23S17 doesn't have bit-set operations, so it's
|
||||
// cheaper to keep a copy here than to read/modify/write it
|
||||
|
||||
uint8_t dataOutRegister = 0 ;
|
||||
uint8_t pudRegister = 0 ;
|
||||
|
||||
// MCP23S17 Registers
|
||||
|
||||
#define IOCON 0x0A
|
||||
|
||||
#define IODIRA 0x00
|
||||
#define IPOLA 0x02
|
||||
#define GPINTENA 0x04
|
||||
#define DEFVALA 0x06
|
||||
#define INTCONA 0x08
|
||||
#define GPPUA 0x0C
|
||||
#define INTFA 0x0E
|
||||
#define INTCAPA 0x10
|
||||
#define GPIOA 0x12
|
||||
#define OLATA 0x14
|
||||
|
||||
#define IODIRB 0x01
|
||||
#define IPOLB 0x03
|
||||
#define GPINTENB 0x05
|
||||
#define DEFVALB 0x07
|
||||
#define INTCONB 0x09
|
||||
#define GPPUB 0x0D
|
||||
#define INTFB 0x0F
|
||||
#define INTCAPB 0x11
|
||||
#define GPIOB 0x13
|
||||
#define OLATB 0x15
|
||||
|
||||
// Bits in the IOCON register
|
||||
|
||||
#define IOCON_BANK_MODE 0x80
|
||||
#define IOCON_MIRROR 0x40
|
||||
#define IOCON_SEQOP 0x20
|
||||
#define IOCON_DISSLW 0x10
|
||||
#define IOCON_HAEN 0x08
|
||||
#define IOCON_ODR 0x04
|
||||
#define IOCON_INTPOL 0x02
|
||||
#define IOCON_UNUSED 0x01
|
||||
|
||||
// Default initialisation mode
|
||||
|
||||
#define IOCON_INIT (IOCON_SEQOP)
|
||||
|
||||
// Command codes
|
||||
|
||||
#define CMD_WRITE 0x40
|
||||
#define CMD_READ 0x41
|
||||
|
||||
|
||||
/*
|
||||
* writeByte:
|
||||
* Write a byte to a register on the MCP23S17 on the SPI bus.
|
||||
* This is using the synchronous access mechanism.
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
static void writeByte (uint8_t reg, uint8_t data)
|
||||
{
|
||||
uint8_t spiBufTx [3] ;
|
||||
uint8_t spiBufRx [3] ;
|
||||
struct spi_ioc_transfer spi ;
|
||||
|
||||
spiBufTx [0] = CMD_WRITE ;
|
||||
spiBufTx [1] = reg ;
|
||||
spiBufTx [2] = data ;
|
||||
|
||||
spi.tx_buf = (unsigned long)spiBufTx ;
|
||||
spi.rx_buf = (unsigned long)spiBufRx ;
|
||||
spi.len = 3 ;
|
||||
spi.delay_usecs = spiDelay ;
|
||||
spi.speed_hz = spiSpeed ;
|
||||
spi.bits_per_word = spiBPW ;
|
||||
|
||||
ioctl (spiFd, SPI_IOC_MESSAGE(1), &spi) ;
|
||||
}
|
||||
|
||||
/*
|
||||
* readByte:
|
||||
* Read a byte from a register on the MCP23S17 on the SPI bus.
|
||||
* This is the synchronous access mechanism.
|
||||
* What appears to happen is that the data returned is at
|
||||
* the same offset as the number of bytes written to the device. So if we
|
||||
* write 2 bytes (e.g. command then register number), then the data returned
|
||||
* will by at the 3rd byte...
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
static uint8_t readByte (uint8_t reg)
|
||||
{
|
||||
uint8_t tx [4] ;
|
||||
uint8_t rx [4] ;
|
||||
struct spi_ioc_transfer spi ;
|
||||
|
||||
tx [0] = CMD_READ ;
|
||||
tx [1] = reg ;
|
||||
tx [2] = 0 ;
|
||||
|
||||
spi.tx_buf = (unsigned long)tx ;
|
||||
spi.rx_buf = (unsigned long)rx ;
|
||||
spi.len = 3 ;
|
||||
spi.delay_usecs = spiDelay ;
|
||||
spi.speed_hz = spiSpeed ;
|
||||
spi.bits_per_word = spiBPW ;
|
||||
|
||||
ioctl (spiFd, SPI_IOC_MESSAGE(1), &spi) ;
|
||||
|
||||
return rx [2] ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* digitalWritePiFace:
|
||||
* Perform the digitalWrite function on the PiFace board
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void digitalWritePiFace (int pin, int value)
|
||||
{
|
||||
uint8_t mask = 1 << pin ;
|
||||
|
||||
if (value == 0)
|
||||
dataOutRegister &= (~mask) ;
|
||||
else
|
||||
dataOutRegister |= mask ;
|
||||
|
||||
writeByte (GPIOA, dataOutRegister) ;
|
||||
}
|
||||
|
||||
|
||||
void digitalWritePiFaceSpecial (int pin, int value)
|
||||
{
|
||||
uint8_t mask = 1 << pin ;
|
||||
uint8_t old ;
|
||||
|
||||
old = readByte (GPIOA) ;
|
||||
|
||||
if (value == 0)
|
||||
old &= (~mask) ;
|
||||
else
|
||||
old |= mask ;
|
||||
|
||||
writeByte (GPIOA, old) ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* digitalReadPiFace:
|
||||
* Perform the digitalRead function on the PiFace board
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
int digitalReadPiFace (int pin)
|
||||
{
|
||||
uint8_t mask = 1 << pin ;
|
||||
|
||||
if ((readByte (GPIOB) & mask) != 0)
|
||||
return HIGH ;
|
||||
else
|
||||
return LOW ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* pullUpDnControlPiFace:
|
||||
* Perform the pullUpDnControl function on the PiFace board
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void pullUpDnControlPiFace (int pin, int pud)
|
||||
{
|
||||
uint8_t mask = 1 << pin ;
|
||||
|
||||
if (pud == PUD_UP)
|
||||
pudRegister |= mask ;
|
||||
else
|
||||
pudRegister &= (~mask) ;
|
||||
|
||||
writeByte (GPPUB, pudRegister) ;
|
||||
|
||||
}
|
||||
|
||||
|
||||
void pullUpDnControlPiFaceSpecial (int pin, int pud)
|
||||
{
|
||||
uint8_t mask = 1 << pin ;
|
||||
uint8_t old ;
|
||||
|
||||
old = readByte (GPPUB) ;
|
||||
|
||||
if (pud == PUD_UP)
|
||||
old |= mask ;
|
||||
else
|
||||
old &= (~mask) ;
|
||||
|
||||
writeByte (GPPUB, old) ;
|
||||
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
* Dummy functions that are not used in this mode
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void pinModePiFace (int pin, int mode) {}
|
||||
void pwmWritePiFace (int pin, int value) {}
|
||||
int waitForInterruptPiFace (int pin, int mS) { return 0 ; }
|
||||
|
||||
|
||||
/*
|
||||
* wiringPiSetupPiFace
|
||||
* Setup the SPI interface and initialise the MCP23S17 chip
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
static int _wiringPiSetupPiFace (void)
|
||||
{
|
||||
if ((spiFd = open (spiDevice, O_RDWR)) < 0)
|
||||
return -1 ;
|
||||
|
||||
// Set SPI parameters
|
||||
// Why are we doing a read after write?
|
||||
// I don't know - just blindliy copying an example elsewhere... -GH-
|
||||
|
||||
if (ioctl (spiFd, SPI_IOC_WR_MODE, &spiMode) < 0)
|
||||
return -1 ;
|
||||
|
||||
if (ioctl (spiFd, SPI_IOC_RD_MODE, &spiMode) < 0)
|
||||
return -1 ;
|
||||
|
||||
if (ioctl (spiFd, SPI_IOC_WR_BITS_PER_WORD, &spiBPW) < 0)
|
||||
return -1 ;
|
||||
|
||||
if (ioctl (spiFd, SPI_IOC_RD_BITS_PER_WORD, &spiBPW) < 0)
|
||||
return -1 ;
|
||||
|
||||
if (ioctl (spiFd, SPI_IOC_WR_MAX_SPEED_HZ, &spiSpeed) < 0)
|
||||
return -1 ;
|
||||
|
||||
if (ioctl (spiFd, SPI_IOC_RD_MAX_SPEED_HZ, &spiSpeed) < 0)
|
||||
return -1 ;
|
||||
|
||||
// Setup the MCP23S17
|
||||
|
||||
writeByte (IOCON, IOCON_INIT) ;
|
||||
|
||||
writeByte (IODIRA, 0x00) ; // Port A -> Outputs
|
||||
writeByte (IODIRB, 0xFF) ; // Port B -> Inputs
|
||||
|
||||
return 0 ;
|
||||
}
|
||||
|
||||
|
||||
int wiringPiSetupPiFace (void)
|
||||
{
|
||||
int x = _wiringPiSetupPiFace () ;
|
||||
|
||||
if (x != 0)
|
||||
return x ;
|
||||
|
||||
writeByte (GPIOA, 0x00) ; // Set all outptus off
|
||||
writeByte (GPPUB, 0x00) ; // Disable any pull-ups on port B
|
||||
|
||||
pinMode = pinModePiFace ;
|
||||
pullUpDnControl = pullUpDnControlPiFace ;
|
||||
digitalWrite = digitalWritePiFace ;
|
||||
pwmWrite = pwmWritePiFace ;
|
||||
digitalRead = digitalReadPiFace ;
|
||||
waitForInterrupt = waitForInterruptPiFace ;
|
||||
|
||||
return 0 ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* wiringPiSetupPiFaceForGpioProg:
|
||||
* Setup the SPI interface and initialise the MCP23S17 chip
|
||||
* Special version for the gpio program
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
|
||||
int wiringPiSetupPiFaceForGpioProg (void)
|
||||
{
|
||||
int x = _wiringPiSetupPiFace () ;
|
||||
|
||||
if (x != 0)
|
||||
return x ;
|
||||
|
||||
pinMode = pinModePiFace ;
|
||||
pullUpDnControl = pullUpDnControlPiFaceSpecial ;
|
||||
digitalWrite = digitalWritePiFaceSpecial ;
|
||||
pwmWrite = pwmWritePiFace ;
|
||||
digitalRead = digitalReadPiFace ;
|
||||
waitForInterrupt = waitForInterruptPiFace ;
|
||||
|
||||
return 0 ;
|
||||
}
|
||||
|
|
@ -0,0 +1,218 @@
|
|||
/*
|
||||
* wiringSerial.c:
|
||||
* Handle a serial port
|
||||
***********************************************************************
|
||||
* This file is part of wiringPi:
|
||||
* https://projects.drogon.net/raspberry-pi/wiringpi/
|
||||
*
|
||||
* wiringPi is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License as published by
|
||||
* the Free Software Foundation, either version 3 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* wiringPi is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public License
|
||||
* along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
|
||||
***********************************************************************
|
||||
*/
|
||||
|
||||
#undef DEBUG
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <stdint.h>
|
||||
#include <stdarg.h>
|
||||
#include <string.h>
|
||||
#include <termios.h>
|
||||
#include <unistd.h>
|
||||
#include <fcntl.h>
|
||||
#include <sys/ioctl.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/stat.h>
|
||||
|
||||
#include "wiringSerial.h"
|
||||
|
||||
/*
|
||||
* serialOpen:
|
||||
* Open and initialise the serial port, setting all the right
|
||||
* port parameters - or as many as are required - hopefully!
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
int serialOpen (char *device, int baud)
|
||||
{
|
||||
struct termios options ;
|
||||
speed_t myBaud ;
|
||||
int status, fd ;
|
||||
|
||||
#ifdef DEBUG
|
||||
printf ("openSerialPort: <%s> baud: $d\n", device, baud) ;
|
||||
#endif
|
||||
|
||||
switch (baud)
|
||||
{
|
||||
case 50: myBaud = B50 ; break ;
|
||||
case 75: myBaud = B75 ; break ;
|
||||
case 110: myBaud = B110 ; break ;
|
||||
case 134: myBaud = B134 ; break ;
|
||||
case 150: myBaud = B150 ; break ;
|
||||
case 200: myBaud = B200 ; break ;
|
||||
case 300: myBaud = B300 ; break ;
|
||||
case 600: myBaud = B600 ; break ;
|
||||
case 1200: myBaud = B1200 ; break ;
|
||||
case 1800: myBaud = B1800 ; break ;
|
||||
case 2400: myBaud = B2400 ; break ;
|
||||
case 9600: myBaud = B9600 ; break ;
|
||||
case 19200: myBaud = B19200 ; break ;
|
||||
case 38400: myBaud = B38400 ; break ;
|
||||
case 57600: myBaud = B57600 ; break ;
|
||||
case 115200: myBaud = B115200 ; break ;
|
||||
case 230400: myBaud = B230400 ; break ;
|
||||
|
||||
default:
|
||||
return -2 ;
|
||||
}
|
||||
|
||||
if ((fd = open (device, O_RDWR | O_NOCTTY | O_NDELAY | O_NONBLOCK)) == -1)
|
||||
return -1 ;
|
||||
|
||||
fcntl (fd, F_SETFL, O_RDWR) ;
|
||||
|
||||
// Get and modify current options:
|
||||
|
||||
tcgetattr (fd, &options) ;
|
||||
|
||||
cfmakeraw (&options) ;
|
||||
cfsetispeed (&options, myBaud) ;
|
||||
cfsetospeed (&options, myBaud) ;
|
||||
|
||||
options.c_cflag |= (CLOCAL | CREAD) ;
|
||||
options.c_cflag &= ~PARENB ;
|
||||
options.c_cflag &= ~CSTOPB ;
|
||||
options.c_cflag &= ~CSIZE ;
|
||||
options.c_cflag |= CS8 ;
|
||||
options.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG) ;
|
||||
options.c_oflag &= ~OPOST ;
|
||||
|
||||
options.c_cc [VMIN] = 0 ;
|
||||
options.c_cc [VTIME] = 100 ; // Ten seconds (100 deciseconds)
|
||||
|
||||
tcsetattr (fd, TCSANOW | TCSAFLUSH, &options) ;
|
||||
|
||||
ioctl (fd, TIOCMGET, &status);
|
||||
|
||||
status |= TIOCM_DTR ;
|
||||
status |= TIOCM_RTS ;
|
||||
|
||||
ioctl (fd, TIOCMSET, &status);
|
||||
|
||||
usleep (10000) ; // 10mS
|
||||
|
||||
return fd ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* serialFlush:
|
||||
* Flush the serial buffers (both tx & rx)
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void serialFlush (int fd)
|
||||
{
|
||||
tcflush (fd, TCIOFLUSH) ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* serialClose:
|
||||
* Release the serial port
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void serialClose (int fd)
|
||||
{
|
||||
close (fd) ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* serialPutchar:
|
||||
* Send a single character to the serial port
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void serialPutchar (int fd, unsigned char c)
|
||||
{
|
||||
write (fd, &c, 1) ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* serialPuts:
|
||||
* Send a string to the serial port
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void serialPuts (int fd, char *s)
|
||||
{
|
||||
write (fd, s, strlen (s)) ;
|
||||
}
|
||||
|
||||
/*
|
||||
* serialPrintf:
|
||||
* Printf over Serial
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void serialPrintf (int fd, char *message, ...)
|
||||
{
|
||||
va_list argp ;
|
||||
char buffer [1024] ;
|
||||
|
||||
va_start (argp, message) ;
|
||||
vsnprintf (buffer, 1023, message, argp) ;
|
||||
va_end (argp) ;
|
||||
|
||||
serialPuts (fd, buffer) ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* serialDataAvail:
|
||||
* Return the number of bytes of data avalable to be read in the serial port
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
int serialDataAvail (int fd)
|
||||
{
|
||||
int result ;
|
||||
|
||||
if (ioctl (fd, FIONREAD, &result) == -1)
|
||||
return -1 ;
|
||||
|
||||
return result ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* serialGetchar:
|
||||
* Get a single character from the serial device.
|
||||
* Note: Zero is a valid character and this function will time-out after
|
||||
* 10 seconds.
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
int serialGetchar (int fd)
|
||||
{
|
||||
uint8_t x ;
|
||||
|
||||
if (read (fd, &x, 1) != 1)
|
||||
return -1 ;
|
||||
|
||||
return ((int)x) & 0xFF ;
|
||||
}
|
||||
|
|
@ -0,0 +1,38 @@
|
|||
/*
|
||||
* wiringSerial.h:
|
||||
* Handle a serial port
|
||||
***********************************************************************
|
||||
* This file is part of wiringPi:
|
||||
* https://projects.drogon.net/raspberry-pi/wiringpi/
|
||||
*
|
||||
* wiringPi is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License as published by
|
||||
* the Free Software Foundation, either version 3 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* wiringPi is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public License
|
||||
* along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
|
||||
***********************************************************************
|
||||
*/
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
extern int serialOpen (char *device, int baud) ;
|
||||
extern void serialClose (int fd) ;
|
||||
extern void serialFlush (int fd) ;
|
||||
extern void serialPutchar (int fd, unsigned char c) ;
|
||||
extern void serialPuts (int fd, char *s) ;
|
||||
extern void serialPrintf (int fd, char *message, ...) ;
|
||||
extern int serialDataAvail (int fd) ;
|
||||
extern int serialGetchar (int fd) ;
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
|
@ -0,0 +1,84 @@
|
|||
/*
|
||||
* wiringShift.c:
|
||||
* Emulate some of the Arduino wiring functionality.
|
||||
*
|
||||
* Copyright (c) 2009-2012 Gordon Henderson.
|
||||
***********************************************************************
|
||||
* This file is part of wiringPi:
|
||||
* https://projects.drogon.net/raspberry-pi/wiringpi/
|
||||
*
|
||||
* wiringPi is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License as published by
|
||||
* the Free Software Foundation, either version 3 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* wiringPi is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public License
|
||||
* along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
|
||||
***********************************************************************
|
||||
*/
|
||||
|
||||
#include <stdint.h>
|
||||
|
||||
#include "wiringPi.h"
|
||||
#include "wiringShift.h"
|
||||
|
||||
/*
|
||||
* shiftIn:
|
||||
* Shift data in from a clocked source
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
uint8_t shiftIn (uint8_t dPin, uint8_t cPin, uint8_t order)
|
||||
{
|
||||
uint8_t value = 0 ;
|
||||
int8_t i ;
|
||||
|
||||
if (order == MSBFIRST)
|
||||
for (i = 7 ; i >= 0 ; --i)
|
||||
{
|
||||
digitalWrite (cPin, HIGH) ;
|
||||
value |= digitalRead (dPin) << i ;
|
||||
digitalWrite (cPin, LOW) ;
|
||||
}
|
||||
else
|
||||
for (i = 0 ; i < 8 ; ++i)
|
||||
{
|
||||
digitalWrite (cPin, HIGH) ;
|
||||
value |= digitalRead (dPin) << i ;
|
||||
digitalWrite (cPin, LOW) ;
|
||||
}
|
||||
|
||||
return value;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* shiftOut:
|
||||
* Shift data out to a clocked source
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
void shiftOut (uint8_t dPin, uint8_t cPin, uint8_t order, uint8_t val)
|
||||
{
|
||||
int8_t i;
|
||||
|
||||
if (order == MSBFIRST)
|
||||
for (i = 7 ; i >= 0 ; --i)
|
||||
{
|
||||
digitalWrite (dPin, val & (1 << i)) ;
|
||||
digitalWrite (cPin, HIGH) ;
|
||||
digitalWrite (cPin, LOW) ;
|
||||
}
|
||||
else
|
||||
for (i = 0 ; i < 8 ; ++i)
|
||||
{
|
||||
digitalWrite (dPin, val & (1 << i)) ;
|
||||
digitalWrite (cPin, HIGH) ;
|
||||
digitalWrite (cPin, LOW) ;
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,41 @@
|
|||
/*
|
||||
* wiringShift.h:
|
||||
* Emulate some of the Arduino wiring functionality.
|
||||
*
|
||||
* Copyright (c) 2009-2012 Gordon Henderson.
|
||||
***********************************************************************
|
||||
* This file is part of wiringPi:
|
||||
* https://projects.drogon.net/raspberry-pi/wiringpi/
|
||||
*
|
||||
* wiringPi is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License as published by
|
||||
* the Free Software Foundation, either version 3 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* wiringPi is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public License
|
||||
* along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
|
||||
***********************************************************************
|
||||
*/
|
||||
|
||||
#define LSBFIRST 0
|
||||
#define MSBFIRST 1
|
||||
|
||||
#ifndef _STDINT_H
|
||||
# include <stdint.h>
|
||||
#endif
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
extern uint8_t shiftIn (uint8_t dPin, uint8_t cPin, uint8_t order) ;
|
||||
extern void shiftOut (uint8_t dPin, uint8_t cPin, uint8_t order, uint8_t val) ;
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
Loading…
Reference in New Issue