mirror of
https://github.com/clockworkpi/WiringPi.git
synced 2025-12-13 00:08:51 +01:00
Lots of changes here. Added new I2C test code, a new serialTest program,
and developed the new ISR - Interrupt Service Routine handler - much easier than the old waitForInterrupt code! Minor tweaks to the gpio program to recognise the environment variable WIRINGPI_DEBUG too, and removed the printing of the errors from the main wiringPi setup routines (and added some new ones!)
This commit is contained in:
Gordon Henderson
parent
25e4ec570b
commit
13bbba7a22
36
INSTALL
Normal file
36
INSTALL
Normal file
@ -0,0 +1,36 @@
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How to install wiringPi
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=======================
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The easiest way is to use the supplied 'build' script:
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./build
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that should do a complete install or upgrade of wiringPi for you.
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That will install a dynamic library.
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Some distributions do not have /usr/local/lib in the default LD_LIBRARY_PATH. To
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fix this, you need to edit /etc/ld.so.conf and add in a single line:
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/usr/local/lib
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then run the ldconfig command.
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sudo ldconfig
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If you want to install a static library, you may need to do this manually:
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cd wiringPi
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make static
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sudo make install-static
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To un-install wiringPi:
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./build uninstall
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Gordon Henderson
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projects@drogon.net
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https://projects.drogon.net/
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@ -35,10 +35,10 @@ LDLIBS = -lwiringPi
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# Should not alter anything below this line
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###############################################################################
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SRC = test1.c test2.c speed.c lcd.c wfi.c \
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SRC = test1.c test2.c speed.c lcd.c wfi.c isr.c \
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piface.c gertboard.c nes.c \
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pwm.c tone.c servo.c \
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delayTest.c serialRead.c okLed.c
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delayTest.c serialRead.c serialTest.c okLed.c
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OBJ = $(SRC:.c=.o)
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@ -69,6 +69,10 @@ wfi: wfi.o
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@echo [link]
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@$(CC) -o $@ wfi.o $(LDFLAGS) $(LDLIBS)
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isr: isr.o
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@echo [link]
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@$(CC) -o $@ isr.o $(LDFLAGS) $(LDLIBS)
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piface: piface.o
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@echo [link]
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@$(CC) -o $@ piface.o $(LDFLAGS) $(LDLIBS) -lpthread
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@ -93,6 +97,10 @@ serialRead: serialRead.o
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@echo [link]
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@$(CC) -o $@ serialRead.o $(LDFLAGS) $(LDLIBS)
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serialTest: serialTest.o
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@echo [link]
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@$(CC) -o $@ serialTest.o $(LDFLAGS) $(LDLIBS)
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okLed: okLed.o
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@echo [link]
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@$(CC) -o $@ okLed.o $(LDFLAGS) $(LDLIBS)
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99
examples/isr.c
Normal file
99
examples/isr.c
Normal file
@ -0,0 +1,99 @@
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/*
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* isr.c:
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* Wait for Interrupt test program - ISR method
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*
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* How to test:
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* Use the SoC's pull-up and pull down resistors that are avalable
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* on input pins. So compile & run this program (via sudo), then
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* in another terminal:
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* gpio mode 0 up
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* gpio mode 0 down
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* at which point it should trigger an interrupt. Toggle the pin
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* up/down to generate more interrupts to test.
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*
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* Copyright (c) 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 published by
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* the Free Software Foundation, either version 3 of the License, or
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* (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 License
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* along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
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***********************************************************************
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*/
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <wiringPi.h>
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// What GPIO input are we using?
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// This is a wiringPi pin number
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#define BUTTON_PIN 0
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// globalCounter:
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// Global variable to count interrupts
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// Should be declared volatile to make sure the compiler doesn't cache it.
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static volatile int globalCounter = 0 ;
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/*
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* myInterrupt:
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*********************************************************************************
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*/
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void myInterrupt (void)
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{
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++globalCounter ;
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}
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/*
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*********************************************************************************
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* main
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*********************************************************************************
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*/
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int main (void)
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{
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int myCounter = 0 ;
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if (wiringPiSetup () < 0)
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{
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fprintf (stderr, "Unable to setup wiringPi: %s\n", strerror (errno)) ;
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return 1 ;
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}
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if (wiringPiISR (BUTTON_PIN, INT_EDGE_FALLING, &myInterrupt) < 0)
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{
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fprintf (stderr, "Unable to setup ISR: %s\n", strerror (errno)) ;
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return 1 ;
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}
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for (;;)
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{
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printf ("Waiting ... ") ; fflush (stdout) ;
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while (myCounter == globalCounter)
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delay (100) ;
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printf (" Done. counter: %5d\n", globalCounter) ;
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myCounter = globalCounter ;
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}
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return 0 ;
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}
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@ -17,6 +17,7 @@
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#include <string.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <math.h>
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#include <wiringPi.h>
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#include <softPwm.h>
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57
examples/serialTest.c
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57
examples/serialTest.c
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/*
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* serialTest.c:
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* Very simple program to test the serial port. Expects
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* the port to be looped back to itself
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*
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*/
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <wiringPi.h>
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#include <wiringSerial.h>
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int main ()
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{
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int fd ;
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int count ;
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unsigned int nextTime ;
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if ((fd = serialOpen ("/dev/ttyAMA0", 115200)) < 0)
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{
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fprintf (stderr, "Unable to open serial device: %s\n", strerror (errno)) ;
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return 1 ;
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}
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if (wiringPiSetup () == -1)
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{
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fprintf (stdout, "Unable to start wiringPi: %s\n", strerror (errno)) ;
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return 1 ;
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}
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nextTime = millis () + 300 ;
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for (count = 0 ; count < 256 ; )
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{
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if (millis () > nextTime)
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{
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printf ("\nOut: %3d: ", count) ;
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fflush (stdout) ;
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serialPutchar (fd, count) ;
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nextTime += 300 ;
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++count ;
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}
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delay (3) ;
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while (serialDataAvail (fd))
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{
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printf (" -> %3d", serialGetchar (fd)) ;
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fflush (stdout) ;
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}
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}
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printf ("\n") ;
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return 0 ;
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}
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@ -2,7 +2,17 @@
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* wfi.c:
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* Wait for Interrupt test program
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*
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* Copyright (c) 2012 Gordon Henderson.
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* This program demonstrates the use of the waitForInterrupt()
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* function in wiringPi. It listens to a button input on
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* BCM_GPIO pin 17 (wiringPi pin 0)
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*
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* The biggest issue with this method is that it really only works
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* well in Sys mode.
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*
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* Jan 2013: This way of doing things is sort of deprecated now, see
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* the wiringPiISR() function instead and the isr.c test program here.
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*
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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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@ -33,9 +43,8 @@
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#define COUNT_KEY 0
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// What BCM_GPIO input are we using?
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// GPIO 0 is one of the I2C pins with an on-board pull-up
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#define BUTTON_PIN 0
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#define BUTTON_PIN 17
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// Debounce time in mS
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@ -63,13 +72,11 @@ PI_THREAD (waitForIt)
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int debounceTime = 0 ;
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(void)piHiPri (10) ; // Set this thread to be high priority
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digitalWrite (18, 1) ;
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for (;;)
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{
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if (waitForInterrupt (BUTTON_PIN, -1) > 0) // Got it
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{
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// Bouncing?
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if (millis () < debounceTime)
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@ -80,7 +87,6 @@ PI_THREAD (waitForIt)
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// We have a valid one
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digitalWrite (17, state) ;
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state ^= 1 ;
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piLock (COUNT_KEY) ;
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@ -89,7 +95,7 @@ PI_THREAD (waitForIt)
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// Wait for key to be released
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while (digitalRead (0) == LOW)
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while (digitalRead (BUTTON_PIN) == LOW)
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delay (1) ;
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debounceTime = millis () + DEBOUNCE_TIME ;
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@ -108,11 +114,9 @@ void setup (void)
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{
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// Use the gpio program to initialise the hardware
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// (This is the crude, but effective bit)
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// (This is the crude, but effective)
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system ("gpio edge 0 falling") ;
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system ("gpio export 17 out") ;
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system ("gpio export 18 out") ;
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system ("gpio edge 17 falling") ;
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// Setup wiringPi
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@ -120,9 +124,8 @@ void setup (void)
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// Fire off our interrupt handler
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piThreadCreate (waitForIt) ;
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piThreadCreate (waitForIt) ;
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digitalWrite (17, 0) ;
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}
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@ -147,7 +150,7 @@ int main (void)
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piLock (COUNT_KEY) ;
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myCounter = globalCounter ;
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piUnlock (COUNT_KEY) ;
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delay (5000) ;
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delay (500) ;
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}
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printf (" Done. myCounter: %5d\n", myCounter) ;
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@ -30,7 +30,7 @@ INCLUDE = -I/usr/local/include
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CFLAGS = $(DEBUG) -Wall $(INCLUDE) -Winline -pipe
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LDFLAGS = -L/usr/local/lib
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LIBS = -lwiringPi
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LIBS = -lwiringPi -lpthread
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# May not need to alter anything below this line
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###############################################################################
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13
gpio/gpio.1
13
gpio/gpio.1
@ -57,6 +57,9 @@ converters on the Gertboard. It's designed for simple testing and
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diagnostic purposes, but can be used in shell scripts for general if
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somewhat slow control of the GPIO pins.
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It can also control the IO's on the PiFace IO board and load the SPI and I2C
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kernel modules if required.
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Additionally, it can be used to set the exports in the \fI/sys/class/gpio\fR
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system directory to allow subsequent programs to use the \fR/sys/class/gpio\fR
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interface without needing to be run as root.
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@ -70,6 +73,8 @@ Output the current version including the board revision of the Raspberry Pi.
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.TP
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.B \-g
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Use the BCM_GPIO pins numbers rather than wiringPi pin numbers.
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\fINOTE:\fR The BCM_GPIO pin numbers are always used with the
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export and edge commands.
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.TP
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.B \-p
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@ -183,7 +188,7 @@ SPI digital to analogue converter.
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The board jumpers need to be in-place to do this operation.
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.SH "WiringPi vs. GPIO Pin numbering"
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.SH "WiringPi vs. BCM_GPIO Pin numbering"
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.PP
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.TS
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@ -213,6 +218,12 @@ _
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20 - 31
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.TE
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Note that "r1" and "r2" above refers to the board revision. Normally
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wiringPi detects the correct board revision with use for it's own
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numbering scheme, but if you are using a Revision 2 board with some
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of the pins which change numbers between revisions you will need
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to alter your software.
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.SH FILES
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.TP 2.2i
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24
gpio/gpio.c
24
gpio/gpio.c
@ -35,12 +35,14 @@
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#include <wiringPi.h>
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#include <gertboard.h>
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extern int wiringPiDebug ;
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#ifndef TRUE
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# define TRUE (1==1)
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# define FALSE (1==2)
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#endif
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#define VERSION "1.5"
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#define VERSION "1.6"
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static int wpMode ;
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@ -127,7 +129,7 @@ static int moduleLoaded (char *modName)
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static void _doLoadUsage (char *argv [])
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{
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fprintf (stderr, "Usage: %s load <spi/i2c>\n", argv [0]) ;
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fprintf (stderr, "Usage: %s load <spi/i2c> [bufferSize in KB for spi]\n", argv [0]) ;
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exit (1) ;
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}
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@ -136,16 +138,24 @@ static void doLoad (int argc, char *argv [])
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char *module1, *module2 ;
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char cmd [80] ;
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char *file1, *file2 ;
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char spiBuf [32] ;
|
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|
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if (argc != 3)
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if (argc < 3)
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_doLoadUsage (argv) ;
|
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spiBuf [0] = 0 ;
|
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/**/ if (strcasecmp (argv [2], "spi") == 0)
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{
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module1 = "spidev" ;
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module2 = "spi_bcm2708" ;
|
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file1 = "/dev/spidev0.0" ;
|
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file2 = "/dev/spidev0.1" ;
|
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if (argc == 4)
|
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sprintf (spiBuf, " bufsize=%d", atoi (argv [3]) * 1024) ;
|
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else if (argc > 4)
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_doLoadUsage (argv) ;
|
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|
||||
}
|
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else if (strcasecmp (argv [2], "i2c") == 0)
|
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{
|
||||
@ -159,7 +169,7 @@ static void doLoad (int argc, char *argv [])
|
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|
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if (!moduleLoaded (module1))
|
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{
|
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sprintf (cmd, "modprobe %s", module1) ;
|
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sprintf (cmd, "modprobe %s%s", module1, spiBuf) ;
|
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system (cmd) ;
|
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}
|
||||
|
||||
@ -848,6 +858,12 @@ int main (int argc, char *argv [])
|
||||
{
|
||||
int i ;
|
||||
|
||||
if (getenv ("WIRINGPI_DEBUG") != NULL)
|
||||
{
|
||||
printf ("gpio: wiringPi debug mode enabled\n") ;
|
||||
wiringPiDebug = TRUE ;
|
||||
}
|
||||
|
||||
if (argc == 1)
|
||||
{
|
||||
fprintf (stderr, "%s\n", usage) ;
|
||||
|
||||
@ -1,4 +1,4 @@
|
||||
#
|
||||
# ;
|
||||
# Makefile:
|
||||
# wiringPi - Wiring Compatable library for the Raspberry Pi
|
||||
#
|
||||
@ -45,13 +45,15 @@ LIBS =
|
||||
SRC = wiringPi.c wiringPiFace.c wiringSerial.c wiringShift.c \
|
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gertboard.c \
|
||||
piNes.c \
|
||||
lcd.c piHiPri.c piThread.c wiringPiSPI.c \
|
||||
lcd.c piHiPri.c piThread.c \
|
||||
wiringPiSPI.c wiringPiI2C.c \
|
||||
softPwm.c softServo.c softTone.c
|
||||
|
||||
OBJ = $(SRC:.c=.o)
|
||||
|
||||
all: $(STATIC) $(DYNAMIC)
|
||||
#all: $(DYNAMIC)
|
||||
all: $(DYNAMIC)
|
||||
|
||||
static: $(STATIC)
|
||||
|
||||
$(STATIC): $(OBJ)
|
||||
@echo "[Link (Static)]"
|
||||
@ -77,7 +79,7 @@ tags: $(SRC)
|
||||
@ctags $(SRC)
|
||||
|
||||
.PHONEY: install
|
||||
install: $(TARGET)
|
||||
install: $(DYNAMIC)
|
||||
@echo "[Install]"
|
||||
@install -m 0755 -d $(DESTDIR)$(PREFIX)/lib
|
||||
@install -m 0755 -d $(DESTDIR)$(PREFIX)/include
|
||||
@ -91,12 +93,17 @@ install: $(TARGET)
|
||||
@install -m 0644 softTone.h $(DESTDIR)$(PREFIX)/include
|
||||
@install -m 0644 lcd.h $(DESTDIR)$(PREFIX)/include
|
||||
@install -m 0644 wiringPiSPI.h $(DESTDIR)$(PREFIX)/include
|
||||
@install -m 0755 libwiringPi.a $(DESTDIR)$(PREFIX)/lib
|
||||
@install -m 0644 wiringPiI2C.h $(DESTDIR)$(PREFIX)/include
|
||||
@install -m 0755 libwiringPi.so.$(VERSION) $(DESTDIR)$(PREFIX)/lib
|
||||
@ln -sf $(DESTDIR)$(PREFIX)/lib/libwiringPi.so.$(VERSION) $(DESTDIR)/lib/libwiringPi.so
|
||||
@ln -sf $(DESTDIR)$(PREFIX)/lib/libwiringPi.so.$(VERSION) $(DESTDIR)/lib/libwiringPi.so.1
|
||||
@ldconfig
|
||||
|
||||
.PHONEY: install-static
|
||||
install-static: $(STATIC)
|
||||
@echo "[Install Static]"
|
||||
@install -m 0755 libwiringPi.a $(DESTDIR)$(PREFIX)/lib
|
||||
|
||||
.PHONEY: uninstall
|
||||
uninstall:
|
||||
@echo "[UnInstall]"
|
||||
@ -110,6 +117,7 @@ uninstall:
|
||||
@rm -f $(DESTDIR)$(PREFIX)/include/softTone.h
|
||||
@rm -f $(DESTDIR)$(PREFIX)/include/lcd.h
|
||||
@rm -f $(DESTDIR)$(PREFIX)/include/wiringPiSPI.h
|
||||
@rm -f $(DESTDIR)$(PREFIX)/include/wiringPiI2C.h
|
||||
@rm -f $(DESTDIR)$(PREFIX)/lib/libwiringPi.*
|
||||
@ldconfig
|
||||
|
||||
|
||||
@ -65,10 +65,12 @@
|
||||
#include <string.h>
|
||||
#include <time.h>
|
||||
#include <fcntl.h>
|
||||
#include <pthread.h>
|
||||
#include <sys/time.h>
|
||||
#include <sys/mman.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/stat.h>
|
||||
#include <sys/wait.h>
|
||||
|
||||
#include "wiringPi.h"
|
||||
|
||||
@ -173,9 +175,17 @@ static volatile uint32_t *pads ;
|
||||
static volatile uint32_t *timer ;
|
||||
static volatile uint32_t *timerIrqRaw ;
|
||||
|
||||
// Time for easy calculations
|
||||
|
||||
static unsigned long long epoch ;
|
||||
|
||||
// Misc
|
||||
|
||||
static int wiringPiMode = WPI_MODE_UNINITIALISED ;
|
||||
|
||||
// Debugging
|
||||
|
||||
static int wiringPiDebug = FALSE ;
|
||||
int wiringPiDebug = FALSE ;
|
||||
|
||||
// The BCM2835 has 54 GPIO pins.
|
||||
// BCM2835 data sheet, Page 90 onwards.
|
||||
@ -200,6 +210,11 @@ static int wiringPiDebug = FALSE ;
|
||||
|
||||
static int sysFds [64] ;
|
||||
|
||||
// ISR Data
|
||||
|
||||
static void (*isrFunctions [64])(void) ;
|
||||
|
||||
|
||||
// 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!
|
||||
@ -370,10 +385,6 @@ static uint8_t gpioToPwmPort [] =
|
||||
} ;
|
||||
|
||||
|
||||
// Time for easy calculations
|
||||
|
||||
static unsigned long long epoch ;
|
||||
|
||||
/*
|
||||
* Functions
|
||||
*********************************************************************************
|
||||
@ -418,6 +429,15 @@ int wpiPinToGpio (int wpiPin)
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
static void piBoardRevOops (char *why)
|
||||
{
|
||||
fprintf (stderr, "piBoardRev: Unable to determine board revision from /proc/cpuinfo\n") ;
|
||||
fprintf (stderr, " -> %s\n", why) ;
|
||||
fprintf (stderr, " -> You may want to check:\n") ;
|
||||
fprintf (stderr, " -> http://www.raspberrypi.org/phpBB3/viewtopic.php?p=184410#p184410\n") ;
|
||||
exit (EXIT_FAILURE) ;
|
||||
}
|
||||
|
||||
int piBoardRev (void)
|
||||
{
|
||||
FILE *cpuFd ;
|
||||
@ -440,24 +460,19 @@ int piBoardRev (void)
|
||||
fclose (cpuFd) ;
|
||||
|
||||
if (line == NULL)
|
||||
{
|
||||
fprintf (stderr, "piBoardRev: Unable to determine board revision from /proc/cpuinfo\n") ;
|
||||
fprintf (stderr, " (No \"Revision\" line)\n") ;
|
||||
errno = 0 ;
|
||||
return -1 ;
|
||||
}
|
||||
piBoardRevOops ("No \"Revision\" line") ;
|
||||
|
||||
line [strlen (line) - 1] = 0 ; // Chomp LF
|
||||
|
||||
if (wiringPiDebug)
|
||||
printf ("piboardRev: Revision string: %s\n", line) ;
|
||||
|
||||
for (c = line ; *c ; ++c)
|
||||
if (isdigit (*c))
|
||||
break ;
|
||||
|
||||
if (!isdigit (*c))
|
||||
{
|
||||
fprintf (stderr, "piBoardRev: Unable to determine board revision from /proc/cpuinfo\n") ;
|
||||
fprintf (stderr, " (No numeric revision string in: \"%s\"\n", line) ;
|
||||
errno = 0 ;
|
||||
return -1 ;
|
||||
}
|
||||
piBoardRevOops ("No numeric revision string") ;
|
||||
|
||||
// If you have overvolted the Pi, then it appears that the revision
|
||||
// has 100000 added to it!
|
||||
@ -466,26 +481,18 @@ int piBoardRev (void)
|
||||
if (strlen (c) != 4)
|
||||
printf ("piboardRev: This Pi has/is overvolted!\n") ;
|
||||
|
||||
lastChar = c [strlen (c) - 2] ;
|
||||
lastChar = line [strlen (line) - 1] ;
|
||||
|
||||
if (wiringPiDebug)
|
||||
printf ("piboardRev: lastChar is: '%c' (%d, 0x%02X)\n", lastChar, lastChar, lastChar) ;
|
||||
|
||||
/**/ if ((lastChar == '2') || (lastChar == '3'))
|
||||
boardRev = 1 ;
|
||||
else
|
||||
boardRev = 2 ;
|
||||
|
||||
#ifdef DO_WE_CARE_ABOUT_THIS_NOW
|
||||
else
|
||||
{
|
||||
fprintf (stderr, "WARNING: wiringPi: Unable to determine board revision from \"%d\"\n", r) ;
|
||||
fprintf (stderr, " -> You may want to check:\n") ;
|
||||
fprintf (stderr, " -> http://www.raspberrypi.org/phpBB3/viewtopic.php?p=184410#p184410\n") ;
|
||||
fprintf (stderr, " -> Assuming a Rev 1 board\n") ;
|
||||
boardRev = 1 ;
|
||||
}
|
||||
#endif
|
||||
|
||||
if (wiringPiDebug)
|
||||
printf ("piboardRev: Revision string: %s, board revision: %d\n", c, boardRev) ;
|
||||
printf ("piBoardRev: Returning revision: %d\n", boardRev) ;
|
||||
|
||||
return boardRev ;
|
||||
}
|
||||
@ -741,11 +748,11 @@ void digitalWriteByteGpio (int value)
|
||||
else
|
||||
pinSet |= (1 << pinToGpio [pin]) ;
|
||||
|
||||
*(gpio + gpioToGPCLR [0]) = pinClr ;
|
||||
*(gpio + gpioToGPSET [0]) = pinSet ;
|
||||
|
||||
mask <<= 1 ;
|
||||
}
|
||||
|
||||
*(gpio + gpioToGPCLR [0]) = pinClr ;
|
||||
*(gpio + gpioToGPSET [0]) = pinSet ;
|
||||
}
|
||||
|
||||
void digitalWriteByteSys (int value)
|
||||
@ -943,6 +950,99 @@ int waitForInterruptGpio (int pin, int mS)
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* interruptHandler:
|
||||
* This is a thread and gets started to wait for the interrupt we're
|
||||
* hoping to catch. It will call the user-function when the interrupt
|
||||
* fires.
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
static void *interruptHandler (void *arg)
|
||||
{
|
||||
int myPin = *(int *)arg ;
|
||||
|
||||
(void)piHiPri (55) ; // Only effective if we run as root
|
||||
|
||||
for (;;)
|
||||
if (waitForInterruptSys (myPin, -1) > 0)
|
||||
isrFunctions [myPin] () ;
|
||||
|
||||
return NULL ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* wiringPiISR:
|
||||
* Take the details and create an interrupt handler that will do a call-
|
||||
* back to the user supplied function.
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
int wiringPiISR (int pin, int mode, void (*function)(void))
|
||||
{
|
||||
pthread_t threadId ;
|
||||
char fName [64] ;
|
||||
char *modeS ;
|
||||
char pinS [8] ;
|
||||
pid_t pid ;
|
||||
|
||||
pin &= 63 ;
|
||||
|
||||
if (wiringPiMode == WPI_MODE_UNINITIALISED)
|
||||
{
|
||||
fprintf (stderr, "wiringPiISR: wiringPi has not been initialised. Unable to continue.\n") ;
|
||||
exit (EXIT_FAILURE) ;
|
||||
}
|
||||
else if (wiringPiMode == WPI_MODE_PINS)
|
||||
pin = pinToGpio [pin] ;
|
||||
|
||||
// Now export the pin and set the right edge
|
||||
// We're going to use the gpio program to do this, so it assumes
|
||||
// a full installation of wiringPi. It's a bit 'clunky', but it
|
||||
// is a way that will work when we're running in "Sys" mode, as
|
||||
// a non-root user. (without sudo)
|
||||
|
||||
if (mode != INT_EDGE_SETUP)
|
||||
{
|
||||
/**/ if (mode == INT_EDGE_FALLING)
|
||||
modeS = "falling" ;
|
||||
else if (mode == INT_EDGE_RISING)
|
||||
modeS = "rising" ;
|
||||
else
|
||||
modeS = "both" ;
|
||||
|
||||
sprintf (pinS, "%d", pin) ;
|
||||
|
||||
if ((pid = fork ()) < 0) // Fail
|
||||
return pid ;
|
||||
|
||||
if (pid == 0) // Child, exec
|
||||
{
|
||||
execl ("/usr/local/bin/gpio", "gpio", "edge", pinS, modeS, (char *)NULL) ;
|
||||
return -1 ; // Failure ...
|
||||
}
|
||||
else // Parent, wait
|
||||
wait (NULL) ;
|
||||
}
|
||||
|
||||
// Now pre-open the /sys/class node - it may already be open if
|
||||
// we had set it up earlier, but this will do no harm.
|
||||
|
||||
sprintf (fName, "/sys/class/gpio/gpio%d/value", pin) ;
|
||||
if ((sysFds [pin] = open (fName, O_RDWR)) < 0)
|
||||
return -1 ;
|
||||
|
||||
isrFunctions [pin] = function ;
|
||||
|
||||
pthread_create (&threadId, NULL, interruptHandler, &pin) ;
|
||||
|
||||
delay (1) ;
|
||||
|
||||
return 0 ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* delay:
|
||||
* Wait for some number of milli seconds
|
||||
@ -1064,8 +1164,17 @@ int wiringPiSetup (void)
|
||||
uint8_t *gpioMem, *pwmMem, *clkMem, *padsMem, *timerMem ;
|
||||
struct timeval tv ;
|
||||
|
||||
if (geteuid () != 0)
|
||||
{
|
||||
fprintf (stderr, "Must be root to call wiringPiSetup(). (Did you forget sudo?)\n") ;
|
||||
exit (EXIT_FAILURE) ;
|
||||
}
|
||||
|
||||
if (getenv ("WIRINGPI_DEBUG") != NULL)
|
||||
{
|
||||
printf ("wiringPi: Debug mode enabled\n") ;
|
||||
wiringPiDebug = TRUE ;
|
||||
}
|
||||
|
||||
if (wiringPiDebug)
|
||||
printf ("wiringPi: wiringPiSetup called\n") ;
|
||||
@ -1083,8 +1192,7 @@ int wiringPiSetup (void)
|
||||
pwmSetRange = pwmSetRangeWPi ;
|
||||
pwmSetClock = pwmSetClockWPi ;
|
||||
|
||||
if ((boardRev = piBoardRev ()) < 0)
|
||||
return -1 ;
|
||||
boardRev = piBoardRev () ;
|
||||
|
||||
if (boardRev == 1)
|
||||
pinToGpio = pinToGpioR1 ;
|
||||
@ -1105,7 +1213,8 @@ int wiringPiSetup (void)
|
||||
|
||||
if ((gpioMem = malloc (BLOCK_SIZE + (PAGE_SIZE-1))) == NULL)
|
||||
{
|
||||
fprintf (stderr, "wiringPiSetup: malloc failed: %s\n", strerror (errno)) ;
|
||||
if (wiringPiDebug)
|
||||
fprintf (stderr, "wiringPiSetup: malloc failed: %s\n", strerror (errno)) ;
|
||||
return -1 ;
|
||||
}
|
||||
|
||||
@ -1118,7 +1227,8 @@ int wiringPiSetup (void)
|
||||
|
||||
if ((int32_t)gpio < 0)
|
||||
{
|
||||
fprintf (stderr, "wiringPiSetup: mmap failed: %s\n", strerror (errno)) ;
|
||||
if (wiringPiDebug)
|
||||
fprintf (stderr, "wiringPiSetup: mmap failed: %s\n", strerror (errno)) ;
|
||||
return -1 ;
|
||||
}
|
||||
|
||||
@ -1126,7 +1236,8 @@ int wiringPiSetup (void)
|
||||
|
||||
if ((pwmMem = malloc (BLOCK_SIZE + (PAGE_SIZE-1))) == NULL)
|
||||
{
|
||||
fprintf (stderr, "wiringPiSetup: pwmMem malloc failed: %s\n", strerror (errno)) ;
|
||||
if (wiringPiDebug)
|
||||
fprintf (stderr, "wiringPiSetup: pwmMem malloc failed: %s\n", strerror (errno)) ;
|
||||
return -1 ;
|
||||
}
|
||||
|
||||
@ -1137,7 +1248,8 @@ int wiringPiSetup (void)
|
||||
|
||||
if ((int32_t)pwm < 0)
|
||||
{
|
||||
fprintf (stderr, "wiringPiSetup: mmap failed (pwm): %s\n", strerror (errno)) ;
|
||||
if (wiringPiDebug)
|
||||
fprintf (stderr, "wiringPiSetup: mmap failed (pwm): %s\n", strerror (errno)) ;
|
||||
return -1 ;
|
||||
}
|
||||
|
||||
@ -1145,7 +1257,8 @@ int wiringPiSetup (void)
|
||||
|
||||
if ((clkMem = malloc (BLOCK_SIZE + (PAGE_SIZE-1))) == NULL)
|
||||
{
|
||||
fprintf (stderr, "wiringPiSetup: clkMem malloc failed: %s\n", strerror (errno)) ;
|
||||
if (wiringPiDebug)
|
||||
fprintf (stderr, "wiringPiSetup: clkMem malloc failed: %s\n", strerror (errno)) ;
|
||||
return -1 ;
|
||||
}
|
||||
|
||||
@ -1156,7 +1269,8 @@ int wiringPiSetup (void)
|
||||
|
||||
if ((int32_t)clk < 0)
|
||||
{
|
||||
fprintf (stderr, "wiringPiSetup: mmap failed (clk): %s\n", strerror (errno)) ;
|
||||
if (wiringPiDebug)
|
||||
fprintf (stderr, "wiringPiSetup: mmap failed (clk): %s\n", strerror (errno)) ;
|
||||
return -1 ;
|
||||
}
|
||||
|
||||
@ -1164,7 +1278,8 @@ int wiringPiSetup (void)
|
||||
|
||||
if ((padsMem = malloc (BLOCK_SIZE + (PAGE_SIZE-1))) == NULL)
|
||||
{
|
||||
fprintf (stderr, "wiringPiSetup: padsMem malloc failed: %s\n", strerror (errno)) ;
|
||||
if (wiringPiDebug)
|
||||
fprintf (stderr, "wiringPiSetup: padsMem malloc failed: %s\n", strerror (errno)) ;
|
||||
return -1 ;
|
||||
}
|
||||
|
||||
@ -1175,7 +1290,8 @@ int wiringPiSetup (void)
|
||||
|
||||
if ((int32_t)pads < 0)
|
||||
{
|
||||
fprintf (stderr, "wiringPiSetup: mmap failed (pads): %s\n", strerror (errno)) ;
|
||||
if (wiringPiDebug)
|
||||
fprintf (stderr, "wiringPiSetup: mmap failed (pads): %s\n", strerror (errno)) ;
|
||||
return -1 ;
|
||||
}
|
||||
|
||||
@ -1188,7 +1304,8 @@ int wiringPiSetup (void)
|
||||
|
||||
if ((timerMem = malloc (BLOCK_SIZE + (PAGE_SIZE-1))) == NULL)
|
||||
{
|
||||
fprintf (stderr, "wiringPiSetup: timerMem malloc failed: %s\n", strerror (errno)) ;
|
||||
if (wiringPiDebug)
|
||||
fprintf (stderr, "wiringPiSetup: timerMem malloc failed: %s\n", strerror (errno)) ;
|
||||
return -1 ;
|
||||
}
|
||||
|
||||
@ -1199,7 +1316,8 @@ int wiringPiSetup (void)
|
||||
|
||||
if ((int32_t)timer < 0)
|
||||
{
|
||||
fprintf (stderr, "wiringPiSetup: mmap failed (timer): %s\n", strerror (errno)) ;
|
||||
if (wiringPiDebug)
|
||||
fprintf (stderr, "wiringPiSetup: mmap failed (timer): %s\n", strerror (errno)) ;
|
||||
return -1 ;
|
||||
}
|
||||
|
||||
@ -1216,6 +1334,8 @@ int wiringPiSetup (void)
|
||||
gettimeofday (&tv, NULL) ;
|
||||
epoch = (tv.tv_sec * 1000000 + tv.tv_usec) / 1000 ;
|
||||
|
||||
wiringPiMode = WPI_MODE_PINS ;
|
||||
|
||||
return 0 ;
|
||||
}
|
||||
|
||||
@ -1233,12 +1353,18 @@ int wiringPiSetupGpio (void)
|
||||
{
|
||||
int x ;
|
||||
|
||||
if (wiringPiDebug)
|
||||
printf ("wiringPi: wiringPiSetupGpio called\n") ;
|
||||
if (geteuid () != 0)
|
||||
{
|
||||
fprintf (stderr, "Must be root to call wiringPiSetupGpio(). (Did you forget sudo?)\n") ;
|
||||
exit (EXIT_FAILURE) ;
|
||||
}
|
||||
|
||||
if ((x = wiringPiSetup ()) < 0)
|
||||
return x ;
|
||||
|
||||
if (wiringPiDebug)
|
||||
printf ("wiringPi: wiringPiSetupGpio called\n") ;
|
||||
|
||||
pinMode = pinModeGpio ;
|
||||
pullUpDnControl = pullUpDnControlGpio ;
|
||||
digitalWrite = digitalWriteGpio ;
|
||||
@ -1252,6 +1378,8 @@ int wiringPiSetupGpio (void)
|
||||
pwmSetRange = pwmSetRangeWPi ;
|
||||
pwmSetClock = pwmSetClockWPi ;
|
||||
|
||||
wiringPiMode = WPI_MODE_GPIO ;
|
||||
|
||||
return 0 ;
|
||||
}
|
||||
|
||||
@ -1272,6 +1400,9 @@ int wiringPiSetupSys (void)
|
||||
struct timeval tv ;
|
||||
char fName [128] ;
|
||||
|
||||
if (getenv ("WIRINGPI_DEBUG") != NULL)
|
||||
wiringPiDebug = TRUE ;
|
||||
|
||||
if (wiringPiDebug)
|
||||
printf ("wiringPi: wiringPiSetupSys called\n") ;
|
||||
|
||||
@ -1288,15 +1419,13 @@ int wiringPiSetupSys (void)
|
||||
pwmSetRange = pwmSetRangeSys ;
|
||||
pwmSetClock = pwmSetClockSys ;
|
||||
|
||||
if ((boardRev = piBoardRev ()) < 0)
|
||||
return -1 ;
|
||||
boardRev = piBoardRev () ;
|
||||
|
||||
if (boardRev == 1)
|
||||
pinToGpio = pinToGpioR1 ;
|
||||
else
|
||||
pinToGpio = pinToGpioR2 ;
|
||||
|
||||
|
||||
// Open and scan the directory, looking for exported GPIOs, and pre-open
|
||||
// the 'value' interface to speed things up for later
|
||||
|
||||
@ -1311,5 +1440,7 @@ int wiringPiSetupSys (void)
|
||||
gettimeofday (&tv, NULL) ;
|
||||
epoch = (tv.tv_sec * 1000000 + tv.tv_usec) / 1000 ;
|
||||
|
||||
wiringPiMode = WPI_MODE_GPIO_SYS ;
|
||||
|
||||
return 0 ;
|
||||
}
|
||||
|
||||
@ -23,32 +23,44 @@
|
||||
|
||||
// Handy defines
|
||||
|
||||
// Deprecated
|
||||
#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 WPI_MODE_UNINITIALISED -1
|
||||
|
||||
#define INPUT 0
|
||||
#define OUTPUT 1
|
||||
#define PWM_OUTPUT 2
|
||||
#define INPUT 0
|
||||
#define OUTPUT 1
|
||||
#define PWM_OUTPUT 2
|
||||
|
||||
#define LOW 0
|
||||
#define HIGH 1
|
||||
#define LOW 0
|
||||
#define HIGH 1
|
||||
|
||||
#define PUD_OFF 0
|
||||
#define PUD_DOWN 1
|
||||
#define PUD_UP 2
|
||||
#define PUD_OFF 0
|
||||
#define PUD_DOWN 1
|
||||
#define PUD_UP 2
|
||||
|
||||
// PWM
|
||||
|
||||
#define PWM_MODE_MS 0
|
||||
#define PWM_MODE_BAL 1
|
||||
#define PWM_MODE_MS 0
|
||||
#define PWM_MODE_BAL 1
|
||||
|
||||
// Interrupt levels
|
||||
|
||||
#define INT_EDGE_SETUP 0
|
||||
#define INT_EDGE_FALLING 1
|
||||
#define INT_EDGE_RISING 2
|
||||
|
||||
// Threads
|
||||
|
||||
#define PI_THREAD(X) void *X (void *dummy)
|
||||
|
||||
|
||||
// Function prototypes
|
||||
// c++ wrappers thanks to a commend by Nick Lott
|
||||
// c++ wrappers thanks to a comment by Nick Lott
|
||||
// (and others on the Raspberry Pi forums)
|
||||
|
||||
#ifdef __cplusplus
|
||||
@ -82,11 +94,10 @@ extern void (*pwmSetClock) (int divisor) ;
|
||||
// Interrupts
|
||||
|
||||
extern int (*waitForInterrupt) (int pin, int mS) ;
|
||||
extern int wiringPiISR (int pin, int mode, void (*function)(void)) ;
|
||||
|
||||
// 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) ;
|
||||
|
||||
122
wiringPi/wiringPiI2C.c
Normal file
122
wiringPi/wiringPiI2C.c
Normal file
@ -0,0 +1,122 @@
|
||||
/*
|
||||
* wiringPiI2C.c:
|
||||
* Simplified I2C access routines
|
||||
* Copyright (c) 2013 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 <fcntl.h>
|
||||
#include <sys/ioctl.h>
|
||||
#include <linux/i2c-dev.h>
|
||||
|
||||
#include "wiringPi.h"
|
||||
#include "wiringPiI2C.h"
|
||||
|
||||
|
||||
/*
|
||||
* wiringPiI2CRead:
|
||||
* Simple device read
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
int wiringPiI2CRead (int fd)
|
||||
{
|
||||
return i2c_smbus_read_byte (fd) ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* wiringPiI2CReadReg8: wiringPiI2CReadReg16:
|
||||
* Read an 8 or 16-bit value from a regsiter on the device
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
int wiringPiI2CReadReg8 (int fd, int reg)
|
||||
{
|
||||
return i2c_smbus_read_byte_data (fd, reg) ;
|
||||
}
|
||||
|
||||
int wiringPiI2CReadReg16 (int fd, int reg)
|
||||
{
|
||||
return i2c_smbus_read_word_data (fd, reg) ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* wiringPiI2CWrite:
|
||||
* Simple device write
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
int wiringPiI2CWrite (int fd, int data)
|
||||
{
|
||||
return i2c_smbus_write_byte (fd, data) ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* wiringPiI2CWriteReg8: wiringPiI2CWriteReg16:
|
||||
* Write an 8 or 16-bit value to the given register
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
int wiringPiI2CWriteReg8 (int fd, int reg, int data)
|
||||
{
|
||||
return i2c_smbus_write_byte_data (fd, reg, data) ;
|
||||
}
|
||||
|
||||
int wiringPiI2CWriteReg16 (int fd, int reg, int data)
|
||||
{
|
||||
return i2c_smbus_write_word_data (fd, reg, data) ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* wiringPiI2CSetup:
|
||||
* Open the I2C device, and regsiter the target device
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
int wiringPiI2CSetup (int devId)
|
||||
{
|
||||
int rev, fd ;
|
||||
char *device ;
|
||||
|
||||
if ((rev = piBoardRev ()) < 0)
|
||||
{
|
||||
fprintf (stderr, "wiringPiI2CSetup: Unable to determine Pi board revision\n") ;
|
||||
exit (1) ;
|
||||
}
|
||||
|
||||
if (rev == 1)
|
||||
device = "/dev/i2c-0" ;
|
||||
else
|
||||
device = "/dev/i2c-1" ;
|
||||
|
||||
if ((fd = open (device, O_RDWR)) < 0)
|
||||
return -1 ;
|
||||
|
||||
if (ioctl (fd, I2C_SLAVE, devId) < 0)
|
||||
return -1 ;
|
||||
|
||||
return fd ;
|
||||
}
|
||||
41
wiringPi/wiringPiI2C.h
Normal file
41
wiringPi/wiringPiI2C.h
Normal file
@ -0,0 +1,41 @@
|
||||
/*
|
||||
* wiringPiI2C.h:
|
||||
* Simplified I2C access routines
|
||||
* Copyright (c) 2013 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/>.
|
||||
***********************************************************************
|
||||
*/
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
extern int wiringPiI2CRead (int fd) ;
|
||||
extern int wiringPiI2CReadReg8 (int fd, int reg) ;
|
||||
extern int wiringPiI2CReadReg16 (int fd, int reg) ;
|
||||
|
||||
extern int wiringPiI2CWrite (int fd, int data) ;
|
||||
extern int wiringPiI2CWriteReg8 (int fd, int reg, int data) ;
|
||||
extern int wiringPiI2CWriteReg16 (int fd, int reg, int data) ;
|
||||
|
||||
int wiringPiI2CSetup (int devId) ;
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
109
wiringPi/wiringPiISR.c
Normal file
109
wiringPi/wiringPiISR.c
Normal file
@ -0,0 +1,109 @@
|
||||
/*
|
||||
* wiringPiISR.c:
|
||||
* Simplified Interrupt Service Routine handling
|
||||
* Copyright (c) 2013 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 <fcntl.h>
|
||||
|
||||
#include "wiringPi.h"
|
||||
|
||||
|
||||
|
||||
static void (*isrFunctions [64])(void) ;
|
||||
static int isrFds [64] ;
|
||||
|
||||
/*
|
||||
* interruptHandler:
|
||||
* This is a thread and gets started to wait for the interrupt we're
|
||||
* hoping to catch. It will call the user-function when the interrupt
|
||||
* fires.
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
static void *interruptHandler (void *arg)
|
||||
{
|
||||
int pin = *(int *)arg ;
|
||||
|
||||
(void)piHiPri (55) ;
|
||||
|
||||
for (;;)
|
||||
{
|
||||
if (waitForInterrupt (pin, -1) > 0)
|
||||
isrFunctions [pin] () ;
|
||||
}
|
||||
|
||||
return NULL ;
|
||||
}
|
||||
|
||||
/*
|
||||
* wiringPiISR:
|
||||
* Take the details and create an interrupt handler that will do a call-
|
||||
* back to the user supplied function.
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
int wiringPiISR (int pin, int mode, void (*function)(void))
|
||||
{
|
||||
pthread_t threadId ;
|
||||
char command [64] ;
|
||||
|
||||
pin &= 63 ;
|
||||
|
||||
if (wiringPiMode == WPI_MODE_UNINITIALISED)
|
||||
{
|
||||
fprintf (stderr, "wiringPiISR: wiringPi has not been initialised. Unable to continue.\n") ;
|
||||
exit (EXIT_FAILURE) ;
|
||||
}
|
||||
else if (wiringPiMode == WPI_MODE_PINS)
|
||||
pin = pinToGpio [pin] ;
|
||||
|
||||
|
||||
isrFunctions [pin] = function ;
|
||||
|
||||
// Now export the pin and set the right edge
|
||||
|
||||
if (mode != INT_EDGE_SETUP)
|
||||
{
|
||||
/**/ if (mode == INT_EDGE_FALLING)
|
||||
modes = "falling" ;
|
||||
else if (mode == INT_EDGE_RISING)
|
||||
modes = "rising" ;
|
||||
else
|
||||
modes = "both" ;
|
||||
|
||||
sprintf (command, "/usr/local/bin/gpio edge %d %s", pin, modes) ;
|
||||
system (command) ;
|
||||
}
|
||||
|
||||
sprintf (fName, "/sys/class/gpio/gpio%d/value", pin) ;
|
||||
if ((isrFds [pin] = open (fName, O_RDWR)) < 0)
|
||||
return -1 ;
|
||||
|
||||
{
|
||||
fprintf ("std
|
||||
|
||||
pthread_create (&threadId, NULL, interruptHandler, &pin) ;
|
||||
}
|
||||
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user