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115 lines
3.8 KiB
C++
115 lines
3.8 KiB
C++
/*
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* Authors: Brendan Le Foll <brendan.le.foll@intel.com>
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* Mihai Tudor Panu <mihai.tudor.panu@intel.com>
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* Sarah Knepper <sarah.knepper@intel.com>
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* Copyright (c) 2014 - 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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#pragma once
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#include <string>
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#include <mraa/aio.hpp>
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#include <interfaces/iTemperature.hpp>
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namespace upm {
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/**
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* @brief NTC Temperature Sensors Library
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* @defgroup temperature libupm-temperature
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* @ingroup seeed analog temp gsk
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*/
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/**
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* @library temperature
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* @sensor temperature
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* @comname Analog Temperature Sensor
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* @altname Grove Temperature Sensor
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* @type temp
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* @man seeed
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* @web http://wiki.seeed.cc/Grove-Temperature_Sensor_V1.2/
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* @con analog
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* @kit gsk
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*
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* @brief API for NTC Temperature Sensors
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*
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* Basic UPM module for analog temperature sensors. These sensors use a NTC
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* thermistor to measure ambient temperature. This driver was developed using
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* the Grove Temperature Sensor. The conversion formula has been updated
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* to work with versions 1.1 and 1.2 of the sensor. For the older v1.0
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* sensor you will have to specify R0 and B values when initializing the
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* device. The range of this sensor is -40 to 125 C and accuracy is +/- 1.5 C.
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*
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* @image html temp.jpg
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* @snippet temperature.cxx Interesting
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*/
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class Temperature : virtual public iTemperature {
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public:
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/**
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* Analog temperature sensor constructor
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*
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* @param pin Analog pin to use
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* @param scale Scaling factor for raw analog value from the ADC,
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* useful for mixed 3.3V/5V boards, default 1.0
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* @param r0 zero power resistance, this is 100K (default) for
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* v1.1-v1.2 and 10K for v1.0 of the sensor
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* @param b thermistor nominal B constant, this is 4275 (default) for
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* v1.1-v1.2 and 3975 for v1.0 of the sensor
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*/
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Temperature(unsigned int pin, float scale = 1.0, int r0 = 100000, int b = 4275);
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/**
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* Analog temperature sensor destructor
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*/
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~Temperature();
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/**
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* Gets the raw value from the AIO pin
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*
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* @return Raw value from the ADC
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*/
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float raw_value();
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/** Provided for compatibility with old grove base class
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*
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* @return Sensor name
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*/
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std::string name()
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{
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return "Temperature sensor";
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}
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/**
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* Gets the temperature in Celsius from the sensor
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*
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* @return Normalized temperature in Celsius
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*/
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int value();
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/**
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* Gets the temperature in Celsius from the sensor
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*
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* @return Normalized temperature in Celsius
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*/
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virtual float getTemperature();
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private:
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mraa_aio_context m_aio;
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float m_scale;
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int m_r0;
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int m_b;
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};
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}
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