/*
* Author: Brendan Le Foll <brendan.le.foll@intel.com>
* Copyright (c) 2015 Intel Corporation.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <stdio.h>
#include <syslog.h>
#include <string.h>
#include <stdbool.h>
//! [Interesting]
#include "mraa.h"
int
main(int argc, char** argv)
{
mraa_result_t ret = MRAA_SUCCESS;
mraa_platform_t platform_type = mraa_get_platform_type();
if (platform_type != MRAA_INTEL_EDISON_FAB_C) {
fprintf(stderr, "Error: This program can only run on an edison\n");
ret = MRAA_ERROR_INVALID_PLATFORM;
goto end;
}
// MRAA_INTEL_EDISON_GP182 == 0 so this will initialise pin0 on arduino
// which is hardware gpio 130 and not 182
mraa_gpio_context gpio182 = mraa_gpio_init(MRAA_INTEL_EDISON_GP182);
if (gpio182 == NULL) {
fprintf(stderr, "Error: Failed to open gpio182\n");
ret = MRAA_ERROR_INVALID_PLATFORM;
goto end;
}
mraa_gpio_dir(gpio182, MRAA_GPIO_OUT);
// we set the owner to false here, this makes sure that we do not close the
// gpio from sysfs in mraa_gpio_close meaning it will stay as an output and
// we will not always transition from 0->1 as gpio182 as output has the
// default position of '0'. Note that the value could change as a result of
// a mraa_gpio_dir however meaning we always go from 0->1 or 1->0
mraa_gpio_owner(gpio182, false);
int val = mraa_gpio_read(gpio182);
printf("GPIO%d (mraa pin %d) was: %d, will set to %d\n", 182, mraa_gpio_get_pin(gpio182), val, !val);
mraa_gpio_write(gpio182, !val);
mraa_gpio_close(gpio182);
end:
mraa_deinit();
return ret;
}
//! [Interesting]