Productize / MAX30205

Fork of Maxim's human body temp sensor library that works with mbed-os 5

Fork of MAX30205 by Maxim Integrated

MAX30205.cpp@9:2b8357c91343, 2017-10-18 (annotated)

Committer:
seppestas
Date:
Wed Oct 18 15:51:47 2017 +0000
Revision:
9:2b8357c91343
Parent:
8:2aeb45dd2bb9 
Use single, 8-bit address to work with mbed I2C; ; Mbed uses 8-bit addresses, see https://docs.mbed.com/docs/mbed-os-api-reference/en/latest/APIs/interfaces/digital/I2C/#api

Who changed what in which revision?

UserRevisionLine numberNew contents of line
j3 0:cdad7a9ef486 1 /*******************************************************************************
j3 1:d4271ef9f37f 2 * Copyright (C) 2017 Maxim Integrated Products, Inc., All Rights Reserved.
j3 0:cdad7a9ef486 3 *
j3 0:cdad7a9ef486 4 * Permission is hereby granted, free of charge, to any person obtaining a
j3 0:cdad7a9ef486 5 * copy of this software and associated documentation files (the "Software"),
j3 0:cdad7a9ef486 6 * to deal in the Software without restriction, including without limitation
j3 0:cdad7a9ef486 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
j3 0:cdad7a9ef486 8 * and/or sell copies of the Software, and to permit persons to whom the
j3 0:cdad7a9ef486 9 * Software is furnished to do so, subject to the following conditions:
j3 0:cdad7a9ef486 10 *
j3 0:cdad7a9ef486 11 * The above copyright notice and this permission notice shall be included
j3 0:cdad7a9ef486 12 * in all copies or substantial portions of the Software.
j3 0:cdad7a9ef486 13 *
j3 0:cdad7a9ef486 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
j3 0:cdad7a9ef486 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
j3 0:cdad7a9ef486 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
j3 0:cdad7a9ef486 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
j3 0:cdad7a9ef486 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
j3 0:cdad7a9ef486 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
j3 0:cdad7a9ef486 20 * OTHER DEALINGS IN THE SOFTWARE.
j3 0:cdad7a9ef486 21 *
j3 0:cdad7a9ef486 22 * Except as contained in this notice, the name of Maxim Integrated
j3 0:cdad7a9ef486 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
j3 0:cdad7a9ef486 24 * Products, Inc. Branding Policy.
j3 0:cdad7a9ef486 25 *
j3 0:cdad7a9ef486 26 * The mere transfer of this software does not imply any licenses
j3 0:cdad7a9ef486 27 * of trade secrets, proprietary technology, copyrights, patents,
j3 0:cdad7a9ef486 28 * trademarks, maskwork rights, or any other form of intellectual
j3 0:cdad7a9ef486 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
j3 0:cdad7a9ef486 30 * ownership rights.
j3 0:cdad7a9ef486 31 *******************************************************************************
j3 0:cdad7a9ef486 32 */
j3 1:d4271ef9f37f 33
j3 1:d4271ef9f37f 34
j3 0:cdad7a9ef486 35 #include "MAX30205.h"
j3 0:cdad7a9ef486 36
j3 1:d4271ef9f37f 37
j3 0:cdad7a9ef486 38 //******************************************************************************
j3 4:68e1b36becb0 39 MAX30205::MAX30205(I2C &i2c, uint8_t slaveAddress):
seppestas 9:2b8357c91343 40 m_i2c(i2c), m_address(slaveAddress)
j3 0:cdad7a9ef486 41 {
j3 0:cdad7a9ef486 42 }
j3 0:cdad7a9ef486 43
j3 1:d4271ef9f37f 44
j3 0:cdad7a9ef486 45 //******************************************************************************
j3 0:cdad7a9ef486 46 MAX30205::~MAX30205(void)
j3 0:cdad7a9ef486 47 {
j3 0:cdad7a9ef486 48 //empty block
j3 0:cdad7a9ef486 49 }
j3 0:cdad7a9ef486 50
j3 1:d4271ef9f37f 51
j3 0:cdad7a9ef486 52 //******************************************************************************
j3 1:d4271ef9f37f 53 int32_t MAX30205::readTemperature(uint16_t &value)
j3 1:d4271ef9f37f 54 {
j3 1:d4271ef9f37f 55 return readRegister(MAX30205::Temperature, value);
j3 1:d4271ef9f37f 56 }
j3 1:d4271ef9f37f 57
j3 1:d4271ef9f37f 58
j3 1:d4271ef9f37f 59 //******************************************************************************
j3 6:b5ab5204d944 60 int32_t MAX30205::readConfiguration(Configuration_u &config)
j3 0:cdad7a9ef486 61 {
j3 1:d4271ef9f37f 62 uint16_t data;
j3 1:d4271ef9f37f 63
j3 1:d4271ef9f37f 64 int32_t result = readRegister(MAX30205::Configuration, data);
j3 1:d4271ef9f37f 65 if(result == 0)
j3 1:d4271ef9f37f 66 {
j3 1:d4271ef9f37f 67 config.all = (0x00FF & data);
j3 1:d4271ef9f37f 68 }
j3 1:d4271ef9f37f 69
j3 1:d4271ef9f37f 70 return result;
j3 1:d4271ef9f37f 71
j3 1:d4271ef9f37f 72 }
j3 1:d4271ef9f37f 73
j3 1:d4271ef9f37f 74
j3 1:d4271ef9f37f 75 //******************************************************************************
j3 6:b5ab5204d944 76 int32_t MAX30205::writeConfiguration(const Configuration_u config)
j3 1:d4271ef9f37f 77 {
j3 1:d4271ef9f37f 78 uint16_t local_config = (0x00FF & config.all);
j3 1:d4271ef9f37f 79
j3 1:d4271ef9f37f 80 return writeRegister(MAX30205::Configuration, local_config);
j3 1:d4271ef9f37f 81 }
j3 1:d4271ef9f37f 82
j3 1:d4271ef9f37f 83
j3 1:d4271ef9f37f 84 //******************************************************************************
j3 1:d4271ef9f37f 85 int32_t MAX30205::readTHYST(uint16_t &value)
j3 1:d4271ef9f37f 86 {
j3 1:d4271ef9f37f 87 return readRegister(MAX30205::THYST, value);
j3 0:cdad7a9ef486 88 }
j3 0:cdad7a9ef486 89
j3 1:d4271ef9f37f 90
j3 0:cdad7a9ef486 91 //******************************************************************************
j3 1:d4271ef9f37f 92 int32_t MAX30205::writeTHYST(uint16_t value)
j3 1:d4271ef9f37f 93 {
j3 1:d4271ef9f37f 94 return writeRegister(MAX30205::THYST, value);
j3 1:d4271ef9f37f 95 }
j3 1:d4271ef9f37f 96
j3 1:d4271ef9f37f 97
j3 1:d4271ef9f37f 98 //******************************************************************************
j3 1:d4271ef9f37f 99 int32_t MAX30205::readTOS(uint16_t &value)
j3 1:d4271ef9f37f 100 {
j3 1:d4271ef9f37f 101 return readRegister(MAX30205::TOS, value);
j3 1:d4271ef9f37f 102 }
j3 1:d4271ef9f37f 103
j3 1:d4271ef9f37f 104
j3 1:d4271ef9f37f 105 //******************************************************************************
j3 1:d4271ef9f37f 106 int32_t MAX30205::writeTOS(const uint16_t value)
j3 1:d4271ef9f37f 107 {
j3 1:d4271ef9f37f 108 return writeRegister(MAX30205::TOS, value);
j3 1:d4271ef9f37f 109 }
j3 1:d4271ef9f37f 110
j3 1:d4271ef9f37f 111
j3 1:d4271ef9f37f 112 //******************************************************************************
j3 1:d4271ef9f37f 113 float MAX30205::toCelsius(uint32_t rawTemp)
j3 1:d4271ef9f37f 114 {
j3 2:a659724f496a 115 uint8_t val1, val2;
j3 2:a659724f496a 116 float result;
j3 1:d4271ef9f37f 117
j3 2:a659724f496a 118 val1 = (rawTemp >> 8);
j3 2:a659724f496a 119 val2 = (rawTemp & 0xFF);
j3 1:d4271ef9f37f 120
j3 2:a659724f496a 121 result = static_cast<float>(val1 + (val2/ 256.0F));
j3 2:a659724f496a 122
j3 2:a659724f496a 123 return result;
j3 1:d4271ef9f37f 124 }
j3 1:d4271ef9f37f 125
j3 1:d4271ef9f37f 126
j3 1:d4271ef9f37f 127 //******************************************************************************
j3 1:d4271ef9f37f 128 float MAX30205::toFahrenheit(float temperatureC)
j3 1:d4271ef9f37f 129 {
j3 1:d4271ef9f37f 130 return((temperatureC * 1.8F) + 32.0f);
j3 1:d4271ef9f37f 131 }
j3 1:d4271ef9f37f 132
j3 1:d4271ef9f37f 133
j3 1:d4271ef9f37f 134 //******************************************************************************
j3 6:b5ab5204d944 135 int32_t MAX30205::writeRegister(Registers_e reg, uint16_t value)
j3 0:cdad7a9ef486 136 {
j3 0:cdad7a9ef486 137 int32_t result;
j3 0:cdad7a9ef486 138
j3 0:cdad7a9ef486 139 uint8_t hi = ((value >> 8) & 0xFF);
j3 0:cdad7a9ef486 140 uint8_t lo = (value & 0xFF);
j3 0:cdad7a9ef486 141 char cmdData[3] = {reg, hi, lo};
j3 0:cdad7a9ef486 142
seppestas 9:2b8357c91343 143 result = m_i2c.write(m_address, cmdData, 3);
j3 0:cdad7a9ef486 144
j3 0:cdad7a9ef486 145 return result;
j3 0:cdad7a9ef486 146 }
j3 0:cdad7a9ef486 147
j3 0:cdad7a9ef486 148
j3 0:cdad7a9ef486 149 //******************************************************************************
j3 6:b5ab5204d944 150 int32_t MAX30205::readRegister(Registers_e reg, uint16_t &value)
j3 0:cdad7a9ef486 151 {
j3 0:cdad7a9ef486 152 int32_t result;
j3 0:cdad7a9ef486 153
j3 0:cdad7a9ef486 154 char data[2];
j3 0:cdad7a9ef486 155 char cmdData[1] = {reg};
j3 0:cdad7a9ef486 156
seppestas 9:2b8357c91343 157 result = m_i2c.write(m_address, cmdData, 1);
j3 0:cdad7a9ef486 158 if(result == 0)
j3 0:cdad7a9ef486 159 {
seppestas 9:2b8357c91343 160 result = m_i2c.read(m_address, data, 2);
j3 0:cdad7a9ef486 161 if (result == 0)
j3 0:cdad7a9ef486 162 {
j3 0:cdad7a9ef486 163 value = (data[0] << 8) + data[1];
j3 0:cdad7a9ef486 164 }
j3 0:cdad7a9ef486 165 }
j3 0:cdad7a9ef486 166
j3 0:cdad7a9ef486 167 return result;
j3 0:cdad7a9ef486 168 }