170bdd104f
Large change that removes the duplicated MIT notice withe a spdx tag Signed-off-by: Thomas Ingleby <thomas.ingleby@intel.com>
98 lines
1.9 KiB
C++
98 lines
1.9 KiB
C++
/*
|
|
* Author: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
|
|
* Copyright (c) 2018 Linaro Ltd.
|
|
*
|
|
* SPDX-License-Identifier: MIT
|
|
*
|
|
* Example usage: Toggles GPIO's 23 and 24 recursively. Press Ctrl+C to exit
|
|
*
|
|
*/
|
|
|
|
/* standard headers */
|
|
#include <iostream>
|
|
#include <signal.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
/* mraa headers */
|
|
#include "mraa/common.hpp"
|
|
#include "mraa/gpio.hpp"
|
|
|
|
/* gpio declaration */
|
|
#define GPIO_PIN_1 23
|
|
#define GPIO_PIN_2 24
|
|
|
|
volatile sig_atomic_t flag = 1;
|
|
|
|
void
|
|
sig_handler(int signum)
|
|
{
|
|
if (signum == SIGINT) {
|
|
std::cout << "Exiting..." << std::endl;
|
|
flag = 0;
|
|
}
|
|
}
|
|
|
|
int
|
|
main(void)
|
|
{
|
|
mraa::Result status;
|
|
|
|
/* install signal handler */
|
|
signal(SIGINT, sig_handler);
|
|
|
|
//! [Interesting]
|
|
/* initialize GPIO pin */
|
|
mraa::Gpio gpio_1(GPIO_PIN_1);
|
|
|
|
/* initialize GPIO pin */
|
|
mraa::Gpio gpio_2(GPIO_PIN_2);
|
|
|
|
/* set GPIO to output */
|
|
status = gpio_1.dir(mraa::DIR_OUT);
|
|
if (status != mraa::SUCCESS) {
|
|
printError(status);
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
/* set gpio 24 to output */
|
|
status = gpio_2.dir(mraa::DIR_OUT);
|
|
if (status != mraa::SUCCESS) {
|
|
printError(status);
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
/* toggle both GPIO's */
|
|
while (flag) {
|
|
status = gpio_1.write(1);
|
|
if (status != mraa::SUCCESS) {
|
|
printError(status);
|
|
return EXIT_FAILURE;
|
|
}
|
|
status = gpio_2.write(0);
|
|
if (status != mraa::SUCCESS) {
|
|
printError(status);
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
sleep(1);
|
|
|
|
status = gpio_1.write(0);
|
|
if (status != mraa::SUCCESS) {
|
|
printError(status);
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
status = gpio_2.write(1);
|
|
if (status != mraa::SUCCESS) {
|
|
printError(status);
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
sleep(1);
|
|
}
|
|
//! [Interesting]
|
|
|
|
return EXIT_SUCCESS;
|
|
}
|