|
@@ -1,109 +0,0 @@
|
|
|
-/*
|
|
|
- * 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) ;
|
|
|
-}
|
|
|
-
|
|
|
-
|