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Diffstat (limited to 'peripheral/libupm/src/gas/gas.hpp')
-rw-r--r-- | peripheral/libupm/src/gas/gas.hpp | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/peripheral/libupm/src/gas/gas.hpp b/peripheral/libupm/src/gas/gas.hpp new file mode 100644 index 0000000..19bd781 --- /dev/null +++ b/peripheral/libupm/src/gas/gas.hpp @@ -0,0 +1,104 @@ +/* + * Author: Brendan Le Foll <brendan.le.foll@intel.com> + * Copyright (c) 2014 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. + */ +#pragma once + +#include <string> +#include <mraa/aio.hpp> + +struct thresholdContext { + long averageReading; + long runningAverage; + int averagedOver; +}; + +namespace upm { +/** + * @brief Gas Sensor library + * + * Library for air quality and gas detecting sensors. Base class Gas provides buffered + * sampling, threshold checking, basic printing function, and standard read function. + * + * @defgroup gas libupm-gas + * @ingroup seeed analog gaseous eak hak + */ +class Gas { + public: + /** + * Instantiates a Gas object + * + * @param gasPin Pin where gas is connected + */ + Gas(int gasPin); + + /** + * Gas object destructor + */ + ~Gas(); + + /** + * Gets samples from the gas sensor according to the provided window and + * number of samples + * + * @param freqMS Time between each sample (in milliseconds) + * @param numberOfSamples Number of sample to sample for this window + * @param buffer Buffer with sampled data + */ + virtual int getSampledWindow (unsigned int freqMS, int numberOfSamples, uint16_t * buffer); + + /** + * Given the sampled buffer, this method returns TRUE/FALSE if the threshold + * is reached + * + * @param ctx Threshold context + * @param threshold Sample threshold + * @param buffer Buffer with samples + * @param len Buffer length + */ + virtual int findThreshold (thresholdContext* ctx, unsigned int threshold, uint16_t * buffer, int len); + + /** + * Returns average data for the sampled window + * + * @param ctx Threshold context + */ + virtual int getSampledData (thresholdContext* ctx); + + /** + * Returns one sample from the sensor + */ + virtual int getSample (); + + /** + * + * Prints a running average of the threshold context + * + * @param ctx Threshold context + */ + virtual void printGraph (thresholdContext* ctx, uint8_t resolution); + + protected: + mraa::Aio m_aio; +}; + +} |