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77be6adf6d
Additionally, add some error checking in the constructor, and determine the ADC resolution and use that in the voltage calculation rather than a hardcoded 1024.0. Signed-off-by: Jon Trulson <jtrulson@ics.com> Signed-off-by: Zion Orent <zorent@ics.com> Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
86 lines
2.5 KiB
C++
86 lines
2.5 KiB
C++
/*
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* Author: Jon Trulson <jtrulson@ics.com>
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* Copyright (c) 2015 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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#pragma once
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#include <iostream>
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#include <string>
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#include <mraa/aio.h>
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namespace upm {
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/**
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* @brief UPM library for the GP2Y0A family of IR Proximity Sensors
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* @defgroup gp2y0a libupm-gp2y0a
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* @ingroup seeed analog light
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*/
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/**
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* @sensor gp2y0a
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* @library gp2y0a
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* @name GP2Y0A family of IR Proximity Sensors
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* @category light
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* @manufacturer seeed
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* @connection analog
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*
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* @brief C++ API for the GP2Y0A family of IR Proximity Sensors
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*
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* This sensor family returns an analog voltage corresponding to the distance
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* of an object from the sensor. The voltage is lower when objects
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* are far away; the voltage increases as objects get closer
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* to the sensor.
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*
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* @snippet gp2y0a.cxx Interesting
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*/
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class GP2Y0A {
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public:
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/**
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* GP2Y0A sensor constructor
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*
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* @param pin analog pin to use
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*/
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GP2Y0A(int pin);
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/**
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* GP2Y0A Destructor
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*/
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~GP2Y0A();
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/**
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* Get the averaged voltage value from the sensor
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*
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* @param aref the reference voltage in use (5.0 or 3.3 usually)
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* @param samples number of samples to average over
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* @return the averaged voltage reading
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*/
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float value(float aref, uint8_t samples);
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private:
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mraa_aio_context m_aio;
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// ADC resolution
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int m_aRes;
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};
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}
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