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110 lines
3.2 KiB
110 lines
3.2 KiB
/* |
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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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// 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 [8] ; |
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/* |
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* myInterrupt: |
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********************************************************************************* |
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*/ |
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void myInterrupt0 (void) { ++globalCounter [0] ; } |
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void myInterrupt1 (void) { ++globalCounter [1] ; } |
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void myInterrupt2 (void) { ++globalCounter [2] ; } |
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void myInterrupt3 (void) { ++globalCounter [3] ; } |
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void myInterrupt4 (void) { ++globalCounter [4] ; } |
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void myInterrupt5 (void) { ++globalCounter [5] ; } |
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void myInterrupt6 (void) { ++globalCounter [6] ; } |
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void myInterrupt7 (void) { ++globalCounter [7] ; } |
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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 gotOne, pin ; |
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int myCounter [8] ; |
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for (pin = 0 ; pin < 8 ; ++pin) |
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globalCounter [pin] = myCounter [pin] = 0 ; |
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wiringPiSetup () ; |
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wiringPiISR (0, INT_EDGE_FALLING, &myInterrupt0) ; |
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wiringPiISR (1, INT_EDGE_FALLING, &myInterrupt1) ; |
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wiringPiISR (2, INT_EDGE_FALLING, &myInterrupt2) ; |
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wiringPiISR (3, INT_EDGE_FALLING, &myInterrupt3) ; |
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wiringPiISR (4, INT_EDGE_FALLING, &myInterrupt4) ; |
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wiringPiISR (5, INT_EDGE_FALLING, &myInterrupt5) ; |
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wiringPiISR (6, INT_EDGE_FALLING, &myInterrupt6) ; |
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wiringPiISR (7, INT_EDGE_FALLING, &myInterrupt7) ; |
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for (;;) |
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{ |
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gotOne = 0 ; |
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printf ("Waiting ... ") ; fflush (stdout) ; |
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for (;;) |
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{ |
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for (pin = 0 ; pin < 8 ; ++pin) |
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{ |
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if (globalCounter [pin] != myCounter [pin]) |
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{ |
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printf (" Int on pin %d: Counter: %5d\n", pin, globalCounter [pin]) ; |
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myCounter [pin] = globalCounter [pin] ; |
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++gotOne ; |
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} |
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} |
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if (gotOne != 0) |
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break ; |
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} |
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} |
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return 0 ; |
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}
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