130 lines
3.3 KiB
C
130 lines
3.3 KiB
C
/*
|
|
* 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 ;
|
|
}
|