upm/examples/c/speaker-pwm.c

62 lines
1.9 KiB
C
Raw Permalink Normal View History

/*
* Author: Jon Trulson <jtrulson@ics.com>
* Copyright (c) 2017 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 <stdio.h>
#include "speaker.h"
int main ()
{
//! [Interesting]
// Instantiate a Speaker (PWM) on digital pin D3
speaker_context speaker = speaker_init_pwm(26);
if (!speaker)
{
printf("speaker_init() failed\n");
return 1;
}
// emit a series of frequencies for 500ms each
speaker_emit(speaker, 50, 500);
speaker_emit(speaker, 75, 500);
speaker_emit(speaker, 125, 500);
speaker_emit(speaker, 250, 500);
speaker_emit(speaker, 500, 500);
speaker_emit(speaker, 1000, 500);
speaker_emit(speaker, 2000, 500);
speaker_emit(speaker, 3000, 500);
speaker_emit(speaker, 5000, 500);
speaker_emit(speaker, 10000, 500);
printf("Exiting\n");
speaker_close(speaker);
//! [Interesting]
return 0;
}