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87 lines
2.4 KiB
C++
87 lines
2.4 KiB
C++
/*
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* Author: Yevgeniy Kiveisha <yevgeniy.kiveisha@intel.com>
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* Copyright (c) 2014 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 <iostream>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdexcept>
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#include "mlx90614.hpp"
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using namespace upm;
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MLX90614::MLX90614 (int bus, int devAddr) : m_i2Ctx(bus) {
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m_name = "MLX90614";
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m_i2cAddr = devAddr;
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m_bus = bus;
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mraa::Result ret = m_i2Ctx.address(m_i2cAddr);
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if (ret != mraa::SUCCESS) {
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throw std::invalid_argument(std::string(__FUNCTION__) +
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": address() failed");
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}
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if ((ret = m_i2Ctx.frequency(mraa::I2C_STD)) != mraa::SUCCESS ) {
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throw std::invalid_argument(std::string(__FUNCTION__) +
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": I2c.frequency(I2C_STD) failed");
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return;
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}
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}
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float
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MLX90614::readObjectTempF(int objAddr) {
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return (readTemperature(objAddr) * 9 / 5) + 32;
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}
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float
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MLX90614::readAmbientTempF(void) {
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return (readTemperature(MLX90614_TA) * 9 / 5) + 32;
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}
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float
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MLX90614::readObjectTempC(int objAddr) {
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return readTemperature(objAddr);
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}
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float
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MLX90614::readAmbientTempC(void) {
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return readTemperature(MLX90614_TA);
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}
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float
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MLX90614::getTemperature() {
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return readAmbientTempC();
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}
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/*
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* **************
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* private area
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* **************
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*/
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float
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MLX90614::readTemperature (uint8_t address) {
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return m_i2Ctx.readWordReg(address) * 0.02 - 273.15;
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}
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