upm/examples/c/speaker-pwm.c
Mihai Tudor Panu 89d5de43e0 license: update to SPDX style license text throughout
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
2020-03-05 15:13:36 -08:00

49 lines
1.1 KiB
C

/*
* Author: Jon Trulson <jtrulson@ics.com>
* Copyright (c) 2017 Intel Corporation.
*
* This program and the accompanying materials are made available under the
* terms of the The MIT License which is available at
* https://opensource.org/licenses/MIT.
*
* SPDX-License-Identifier: MIT
*/
#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;
}