Added in a max5322 SPI D to A chip
This commit is contained in:
Gordon Henderson
parent
4d43c8cdca
commit
27afc017b9
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@ -44,6 +44,7 @@
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#include <pcf8591.h>
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#include <pcf8574.h>
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#include <max31855.h>
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#include <max5322.h>
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#include <mcp3002.h>
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#include <mcp3004.h>
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#include <mcp4802.h>
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@ -413,6 +414,32 @@ static int doExtensionMcp3004 (char *progName, int pinBase, char *params)
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}
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/*
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* doExtensionMax5322:
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* Analog O
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* max5322:base:spiChan
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*********************************************************************************
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*/
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static int doExtensionMax5322 (char *progName, int pinBase, char *params)
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{
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int spi ;
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if ((params = extractInt (progName, params, &spi)) == NULL)
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return FALSE ;
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if ((spi < 0) || (spi > 1))
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{
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fprintf (stderr, "%s: SPI channel (%d) out of range\n", progName, spi) ;
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return FALSE ;
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}
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max5322Setup (pinBase, spi) ;
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return TRUE ;
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}
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/*
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* doExtensionMcp4802:
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* Analog IO
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@ -503,6 +530,7 @@ struct extensionFunctionStruct extensionFunctions [] =
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{ "mcp4802", &doExtensionMcp4802 },
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{ "mcp3422", &doExtensionMcp3422 },
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{ "max31855", &doExtensionMax31855 },
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{ "max5322", &doExtensionMax5322 },
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{ NULL, NULL },
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} ;
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@ -53,7 +53,7 @@ SRC = wiringPi.c \
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sr595.c \
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pcf8574.c pcf8591.c \
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mcp3002.c mcp3004.c mcp4802.c mcp3422.c \
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max31855.c \
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max31855.c max5322.c \
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drc.c
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OBJ = $(SRC:.c=.o)
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@ -104,6 +104,7 @@ install-headers:
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@install -m 0644 mcp23s08.h $(DESTDIR)$(PREFIX)/include
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@install -m 0644 mcp23s17.h $(DESTDIR)$(PREFIX)/include
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@install -m 0644 max31855.h $(DESTDIR)$(PREFIX)/include
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@install -m 0644 max5322.h $(DESTDIR)$(PREFIX)/include
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@install -m 0644 mcp3002.h $(DESTDIR)$(PREFIX)/include
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@install -m 0644 mcp3004.h $(DESTDIR)$(PREFIX)/include
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@install -m 0644 mcp4802.h $(DESTDIR)$(PREFIX)/include
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@ -142,6 +143,7 @@ uninstall:
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@rm -f $(DESTDIR)$(PREFIX)/include/mcp23s08.h
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@rm -f $(DESTDIR)$(PREFIX)/include/mcp23s17.h
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@rm -f $(DESTDIR)$(PREFIX)/include/max31855.h
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@rm -f $(DESTDIR)$(PREFIX)/include/max5322.h
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@rm -f $(DESTDIR)$(PREFIX)/include/mcp3002.h
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@rm -f $(DESTDIR)$(PREFIX)/include/mcp3004.h
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@rm -f $(DESTDIR)$(PREFIX)/include/mcp4802.h
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@ -181,4 +183,5 @@ mcp3004.o: wiringPi.h wiringPiSPI.h mcp3004.h
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mcp4802.o: wiringPi.h wiringPiSPI.h mcp4802.h
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mcp3422.o: wiringPi.h wiringPiI2C.h mcp3422.h
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max31855.o: wiringPi.h wiringPiSPI.h max31855.h
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max5322.o: wiringPi.h wiringPiSPI.h max5322.h
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drc.o: wiringPi.h wiringSerial.h drc.h
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@ -0,0 +1,84 @@
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/*
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* max5322.c:
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* Extend wiringPi with the MAX5322 SPI Digital to Analog convertor
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* Copyright (c) 2012-2013 Gordon Henderson
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***********************************************************************
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* This file is part of wiringPi:
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* https://projects.drogon.net/raspberry-pi/wiringpi/
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*
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* wiringPi is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* wiringPi is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with wiringPi.
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* If not, see <http://www.gnu.org/licenses/>.
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***********************************************************************
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*/
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#include <wiringPi.h>
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#include <wiringPiSPI.h>
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#include "max5322.h"
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/*
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* myAnalogWrite:
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* Write analog value on the given pin
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*********************************************************************************
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*/
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static void myAnalogWrite (struct wiringPiNodeStruct *node, int pin, int value)
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{
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unsigned char spiData [2] ;
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unsigned char chanBits, dataBits ;
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int chan = pin - node->pinBase ;
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if (chan == 0)
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chanBits = 0b01000000 ;
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else
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chanBits = 0b01010000 ;
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chanBits |= ((value >> 4) & 0x0F) ;
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dataBits = ((value << 4) & 0xF0) ;
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spiData [0] = chanBits ;
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spiData [1] = dataBits ;
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wiringPiSPIDataRW (node->fd, spiData, 2) ;
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}
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/*
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* max5322Setup:
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* Create a new wiringPi device node for an max5322 on the Pi's
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* SPI interface.
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*********************************************************************************
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*/
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int max5322Setup (const int pinBase, int spiChannel)
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{
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struct wiringPiNodeStruct *node ;
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unsigned char spiData [2] ;
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if (wiringPiSPISetup (spiChannel, 8000000) < 0) // 10MHz Max
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return -1 ;
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node = wiringPiNewNode (pinBase, 2) ;
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node->fd = spiChannel ;
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node->analogWrite = myAnalogWrite ;
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// Enable both DACs
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spiData [0] = 0b11100000 ;
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spiData [1] = 0 ;
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wiringPiSPIDataRW (node->fd, spiData, 2) ;
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return 0 ;
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}
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@ -0,0 +1,33 @@
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/*
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* max5322.h:
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* Extend wiringPi with the MAX5322 SPI Digital to Analog convertor
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* Copyright (c) 2012-2013 Gordon Henderson
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***********************************************************************
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* This file is part of wiringPi:
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* https://projects.drogon.net/raspberry-pi/wiringpi/
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*
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* wiringPi is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* wiringPi is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with wiringPi.
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* If not, see <http://www.gnu.org/licenses/>.
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***********************************************************************
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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extern int max5322Setup (int pinBase, int spiChannel) ;
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#ifdef __cplusplus
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}
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#endif
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