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pwrbutton_max2play.c
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/*
Shutdownbutton for Audiophonics Max2Play Setup
build with gcc -I. -o pwrbutton pwrbutton_max2play.c -lwiringPi
add this programm to autostart /etc/rc.local before "exit 0" like this:
/opt/pwrbutton &
@Copyright 2017 Stefan Rick
@author Stefan Rick
Mail: stefan@netzberater.de
Web: https://www.max2play.com
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>
#include <wiringPi.h>
typedef enum { false, true } bool;
// Set WiringPi GPIO
int gpiopin = 17;
int debug = 0;
int block = 0;
void myInterrupt(void) {
// Do not run this multiple times!
if(block == 1)
return;
else
block = 2;
int sysreturn = 0;
char command[100];
sprintf(command ,"poweroff");
sysreturn = system(command);
printf("System: %d", sysreturn);
return;
}
int main (int argc, char *argv[])
{
printf("Usage: %s [-d]\n", argv[0]);
printf(" -d Enable DEBUG output\n\n");
int opt;
while ((opt = getopt(argc, argv, "dc")) != -1) {
switch (opt) {
case 'd': debug = 1; break;
case 'c': break; // change config Path
default:
break;
}
}
wiringPiSetupGpio () ;
// Initialize Button Light (static ON)
pinMode(22, OUTPUT);
digitalWrite(22, 1);
// Create Interrupt Code for Button Pressed Event
wiringPiISR (gpiopin, INT_EDGE_RISING, &myInterrupt) ;
printf("Initialize GPIO Pin %d\n", gpiopin);
for (;;) {
sleep(1000);
}
return 0 ;
}