/* * Author: Brendan Le Foll * Contributions: Mihai Tudor Panu * Contributions: Sarah Knepper * Abhishek Malik * Copyright (c) 2016 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 "led.h" #include "upm_types.h" led_context led_init(int pin){ // make sure MRAA is initialized int mraa_rv; if ((mraa_rv = mraa_init()) != MRAA_SUCCESS) { printf("%s: mraa_init() failed (%d).\n", __FUNCTION__, mraa_rv); return NULL; } led_context dev = (led_context)malloc(sizeof(struct _led_context)); if (!dev) return NULL; dev->name = NULL; dev->gpioled = NULL; dev->led_pin = pin; dev->gpio = mraa_gpio_init(dev->led_pin); if (mraa_gpio_dir(dev->gpio, MRAA_GPIO_OUT) != MRAA_SUCCESS) { printf("%s: Unable to set pin %d as output.\n", __FUNCTION__, pin); free(dev); return NULL; } return dev; } led_context led_init_str(const char* name){ // make sure MRAA is initialized int mraa_rv; if ((mraa_rv = mraa_init()) != MRAA_SUCCESS) { printf("%s: mraa_init() failed (%d).\n", __FUNCTION__, mraa_rv); return NULL; } led_context dev = (led_context)malloc(sizeof(struct _led_context)); if (!dev) return NULL; dev->led_pin = -1; dev->gpio = NULL; dev->name = name; dev->gpioled = mraa_led_init(name); if (!dev->gpioled) { printf("%s: Unable to initialize gpioled device (%s).\n", __FUNCTION__, dev->name); free(dev); return NULL; } dev->max_brightness = mraa_led_read_max_brightness(dev->gpioled); return dev; } void led_close(led_context dev){ if (dev->gpio) { mraa_gpio_close(dev->gpio); } if (dev->gpioled) { mraa_led_close(dev->gpioled); } free(dev); } upm_result_t led_on(led_context dev){ if (dev->gpio) { // using gpio pin if (mraa_gpio_write(dev->gpio, 1) != MRAA_SUCCESS) return UPM_ERROR_OPERATION_FAILED; } else { // using gpioled device if (mraa_led_set_brightness(dev->gpioled, dev->max_brightness) != MRAA_SUCCESS) return UPM_ERROR_OPERATION_FAILED; } return UPM_SUCCESS; } upm_result_t led_off(led_context dev){ if (dev->gpio) { // using gpio pin if (mraa_gpio_write(dev->gpio, 0) != MRAA_SUCCESS) return UPM_ERROR_OPERATION_FAILED; } else { // using gpioled device if (mraa_led_set_brightness(dev->gpioled, 0) != MRAA_SUCCESS) return UPM_ERROR_OPERATION_FAILED; } return UPM_SUCCESS; }