Files
gpio-reader/examples/lowPower.c
Philip Howard a83d64ea6c Prep for deb release as 2.70
This is a general tidyup to detach this fork better from Gordon, who was (and perhaps still is) completely inundated with WiringPi-related support questions.

This changeset includes a number of tweaks which should reduce support burden on Gordon. I believe they are essential if we plan to release a new debian package.

They should - hopefully - not reduce or make ambiguous the origins of this code while achieving the above.

* Remove Gordon's email address from all source files to avoid support queries finding their way to him
* Update wiringPi URLs to the GitHub repository to try and keep bugs/issues within the fork
* Bump version to 2.70 ready for a debian package release
* Update debian package maintainer info, add bugs & homepage URLs to this repository
2022-02-09 11:58:59 +00:00

69 lines
1.9 KiB
C

/*
* lowPower.c:
* Check the Pi's LOW-Power signal.
*
* This is a demonstration program that could be turned into some sort
* of logger via e.g. syslog - however it's also probably something
* that might be better handled by a future kernel - who knows.
*
* Copyright (c) 2014 Gordon Henderson.
***********************************************************************
* This file is part of wiringPi:
* https://github.com/WiringPi/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 <time.h>
#include <wiringPi.h>
#define LOW_POWER 35
/*
* lowPower:
* This is an ISR that waits for the low-power signal going low and
* prints the result.
*********************************************************************************
*/
void lowPower (void)
{
time_t t ;
time (&t) ;
printf ("%s: LOW POWER DETECTED\n", ctime (&t)) ;
}
/*
*********************************************************************************
* main
*********************************************************************************
*/
int main (void)
{
wiringPiSetupGpio () ; // GPIO mode as it's an internal pin
wiringPiISR (LOW_POWER, INT_EDGE_FALLING, &lowPower) ;
for (;;)
delay (1000) ;
return 0 ;
}