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78 lines
2.2 KiB
C
78 lines
2.2 KiB
C
/*
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* Author: Jon Trulson <jtrulson@ics.com>
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* Copyright (c) 2016 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <assert.h>
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#include "yg1006.h"
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yg1006_context yg1006_init(unsigned int pin)
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{
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yg1006_context dev =
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(yg1006_context)malloc(sizeof(struct _yg1006_context));
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if (!dev)
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return NULL;
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dev->gpio = NULL;
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// make sure MRAA is initialized
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int mraa_rv;
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if ((mraa_rv = mraa_init()) != MRAA_SUCCESS)
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{
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printf("%s: mraa_init() failed (%d).\n", __FUNCTION__, mraa_rv);
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yg1006_close(dev);
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return NULL;
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}
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// initialize the MRAA context
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if (!(dev->gpio = mraa_gpio_init(pin)))
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{
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printf("%s: mraa_gpio_init() failed.\n", __FUNCTION__);
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yg1006_close(dev);
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return NULL;
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}
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mraa_gpio_dir(dev->gpio, MRAA_GPIO_IN);
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return dev;
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}
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void yg1006_close(yg1006_context dev)
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{
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assert(dev != NULL);
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if (dev->gpio)
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mraa_gpio_close(dev->gpio);
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free(dev);
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}
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bool yg1006_flame_detected(const yg1006_context dev)
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{
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assert(dev != NULL);
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// gpio is low when a flame is detected
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return (mraa_gpio_read(dev->gpio) ? false : true);
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}
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