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/*
* Author: Thomas Ingleby <thomas.c.ingleby@intel.com>
* Copyright (c) 2014 Intel Corporation.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <unistd.h>
#include <signal.h>
#include "mraa.hpp"
int running = 0;
void
sig_handler(int signo)
{
if (signo == SIGINT) {
printf("closing PWM nicely\n");
running = -1;
}
}
int
main()
{
signal(SIGINT, sig_handler);
//! [Interesting]
mraa::Pwm* pwm;
pwm = new mraa::Pwm(3);
if (pwm == NULL) {
return MRAA_ERROR_UNSPECIFIED;
}
fprintf(stdout, "Cycling PWM on IO3 (pwm3) \n");
pwm->enable(true);
float value = 0.0f;
while (running == 0) {
value = value + 0.01f;
pwm->write(value);
usleep(50000);
if (value >= 1.0f) {
value = 0.0f;
}
}
delete pwm;
//! [Interesting]
return MRAA_SUCCESS;
}
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