170bdd104f
Large change that removes the duplicated MIT notice withe a spdx tag Signed-off-by: Thomas Ingleby <thomas.ingleby@intel.com>
83 lines
1.7 KiB
C
83 lines
1.7 KiB
C
/*
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* Author: Nandkishor Sonar
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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: Reads ADC A0 value continuously. Press Ctrl+C to exit.
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*/
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/* standard headers */
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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 header */
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#include "mraa/aio.h"
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/* AIO port */
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#define AIO_PORT 0
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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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fprintf(stdout, "Exiting...\n");
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flag = 0;
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}
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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_aio_context aio;
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uint16_t value = 0;
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float float_value = 0.0;
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signal(SIGINT, sig_handler);
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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 AIO */
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aio = mraa_aio_init(AIO_PORT);
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if (aio == NULL) {
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fprintf(stderr, "Failed to initialize AIO\n");
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mraa_deinit();
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return EXIT_FAILURE;
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}
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while (flag) {
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value = mraa_aio_read(aio);
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float_value = mraa_aio_read_float(aio);
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fprintf(stdout, "ADC A0 read %X - %d\n", value, value);
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fprintf(stdout, "ADC A0 read float - %.5f\n", float_value);
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}
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/* close AIO */
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status = mraa_aio_close(aio);
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if (status != MRAA_SUCCESS) {
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goto err_exit;
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}
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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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