Fork of Maxim's human body temp sensor library that works with mbed-os 5
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Diff: MAX30205.cpp
- Revision:
- 0:cdad7a9ef486
- Child:
- 1:d4271ef9f37f
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/MAX30205.cpp Mon Apr 03 23:11:58 2017 +0000 @@ -0,0 +1,156 @@ +/******************************************************************************* + * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved. + * + * 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 MAXIM INTEGRATED 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. + * + * Except as contained in this notice, the name of Maxim Integrated + * Products, Inc. shall not be used except as stated in the Maxim Integrated + * Products, Inc. Branding Policy. + * + * The mere transfer of this software does not imply any licenses + * of trade secrets, proprietary technology, copyrights, patents, + * trademarks, maskwork rights, or any other form of intellectual + * property whatsoever. Maxim Integrated Products, Inc. retains all + * ownership rights. + ******************************************************************************* + */ +#include "MAX30205.h" + +//****************************************************************************** +MAX30205::MAX30205(PinName sda, PinName scl, uint8_t slaveAddress): +m_i2c(sda, scl), m_writeAddress(slaveAddress << 1), m_readAddress((slaveAddress << 1) | 1) +{ +} + +//****************************************************************************** +MAX30205::MAX30205(I2C& i2c, uint8_t slaveAddress): +m_i2c(i2c), m_writeAddress(slaveAddress << 1), m_readAddress((slaveAddress << 1) | 1) +{ +} + +//****************************************************************************** +MAX30205::~MAX30205(void) +{ + //empty block +} + +//****************************************************************************** +int32_t MAX30205::reg_write(Registers reg, uint8_t value) +{ + int32_t result; + + char cmdData[2] = {reg, value}; + + result = m_i2c.write(m_writeAddress, cmdData, 2); + + return result; +} + +//****************************************************************************** +int32_t MAX30205::reg_write16(Registers reg, uint16_t value) +{ + int32_t result; + + uint8_t hi = ((value >> 8) & 0xFF); + uint8_t lo = (value & 0xFF); + char cmdData[3] = {reg, hi, lo}; + + result = m_i2c.write(m_writeAddress, cmdData, 3); + + return result; +} + +//****************************************************************************** +int32_t MAX30205::reg_read(Registers reg, uint8_t& value) +{ + int32_t result; + + char cmdData[1] = {reg}; + char readData; + + result = m_i2c.write(m_writeAddress, cmdData, 1); + if(result == 0) + { + result = m_i2c.read(m_readAddress, &readData, 1); + if(result == 0) + { + value = readData; + } + } + + return result; +} + +//****************************************************************************** +int32_t MAX30205::reg_read16(Registers reg, uint16_t& value) +{ + int32_t result; + + char data[2]; + char cmdData[1] = {reg}; + + result = m_i2c.write(m_writeAddress, cmdData, 1); + if(result == 0) + { + result = m_i2c.read(m_readAddress, data, 2); + if (result == 0) + { + value = (data[0] << 8) + data[1]; + } + } + + return result; +} + +//****************************************************************************** +int32_t MAX30205::readTemperature(uint16_t& value) +{ + int32_t result = reg_read16(MAX30205::Temperature, value); + + return result; +} + +//****************************************************************************** +float MAX30205::toCelsius(uint32_t rawTemp) +{ + float val1, val2; + + val1 = static_cast<float>(rawTemp >> 8); + val2 = static_cast<float>(rawTemp & 0xFF); + + return(val2 + (val1 / 256.0F)); +} + +//****************************************************************************** +float MAX30205::toFahrenheit(float temperatureC) +{ + return((temperatureC * 1.8F) + 32.0f); +} + +//****************************************************************************** +int32_t MAX30205::reg_THYST_Read(uint16_t& value) +{ + return reg_read16(MAX30205::THYST, value); +} + +//****************************************************************************** +int32_t MAX30205::reg_THYST_Write(uint16_t value) +{ + return reg_write16(MAX30205::THYST, value); +}