170bdd104f
Large change that removes the duplicated MIT notice withe a spdx tag Signed-off-by: Thomas Ingleby <thomas.ingleby@intel.com>
78 lines
1.6 KiB
C
78 lines
1.6 KiB
C
/*
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* Author: Brendan Le Foll
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* Contributors: Alex Tereschenko <alext.mkrs@gmail.com>
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* Contributors: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
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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: Configures GPIO pin for interrupt and waits 30 seconds for the isr to trigger
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*
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*/
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/* standard headers */
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#include <stdlib.h>
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#include <unistd.h>
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/* mraa header */
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#include "mraa/gpio.h"
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#define GPIO_PIN 6
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void
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int_handler(void* args)
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{
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fprintf(stdout, "ISR triggered\n");
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}
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int
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main()
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{
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mraa_result_t status = MRAA_SUCCESS;
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mraa_gpio_context gpio;
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/* initialize mraa for the platform (not needed most of the times) */
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mraa_init();
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//! [Interesting]
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/* initialize GPIO pin */
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gpio = mraa_gpio_init(GPIO_PIN);
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if (gpio == NULL) {
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fprintf(stderr, "Failed to initialize GPIO %d\n", GPIO_PIN);
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mraa_deinit();
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return EXIT_FAILURE;
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}
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/* set GPIO to input */
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status = mraa_gpio_dir(gpio, MRAA_GPIO_IN);
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if (status != MRAA_SUCCESS) {
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goto err_exit;
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}
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/* configure ISR for GPIO */
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status = mraa_gpio_isr(gpio, MRAA_GPIO_EDGE_BOTH, &int_handler, NULL);
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if (status != MRAA_SUCCESS) {
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goto err_exit;
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}
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/* wait 30 seconds isr trigger */
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sleep(30);
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/* close GPIO */
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mraa_gpio_close(gpio);
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//! [Interesting]
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/* deinitialize mraa for the platform (not needed most of the times) */
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mraa_deinit();
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return EXIT_SUCCESS;
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err_exit:
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mraa_result_print(status);
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/* deinitialize mraa for the platform (not needed most of the times) */
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mraa_deinit();
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return EXIT_FAILURE;
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}
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