170bdd104f
Large change that removes the duplicated MIT notice withe a spdx tag Signed-off-by: Thomas Ingleby <thomas.ingleby@intel.com>
58 lines
1.0 KiB
C++
58 lines
1.0 KiB
C++
/*
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* Author: Thomas Ingleby <thomas.c.ingleby@intel.com>
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* Copyright (c) 2014 Intel Corporation.
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*
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* SPDX-License-Identifier: MIT
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*
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* Example usage: Generates PWM at a step rate of 0.01 continuously.
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* Press Ctrl+C to exit
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*/
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/* standard headers */
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#include <iostream>
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#include <signal.h>
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#include <stdlib.h>
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#include <unistd.h>
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/* mraa headers */
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#include "mraa/common.hpp"
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#include "mraa/pwm.hpp"
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#define PWM_PORT 3
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volatile sig_atomic_t flag = 1;
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void
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sig_handler(int signum)
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{
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if (signum == SIGINT) {
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std::cout << "Exiting..." << std::endl;
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flag = 0;
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}
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}
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int
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main(void)
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{
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float value = 0.0f;
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signal(SIGINT, sig_handler);
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//! [Interesting]
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mraa::Pwm pwm(PWM_PORT);
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std::cout << "Cycling PWM on IO3 (pwm3)" << std::endl;
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pwm.enable(true);
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while (flag) {
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value = value + 0.01f;
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pwm.write(value);
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usleep(50000);
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if (value >= 1.0f) {
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value = 0.0f;
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}
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}
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//! [Interesting]
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return EXIT_SUCCESS;
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}
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