/* * 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]