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MAX30205.cpp
00001 /******************************************************************************* 00002 * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved. 00003 * 00004 * Permission is hereby granted, free of charge, to any person obtaining a 00005 * copy of this software and associated documentation files (the "Software"), 00006 * to deal in the Software without restriction, including without limitation 00007 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 00008 * and/or sell copies of the Software, and to permit persons to whom the 00009 * Software is furnished to do so, subject to the following conditions: 00010 * 00011 * The above copyright notice and this permission notice shall be included 00012 * in all copies or substantial portions of the Software. 00013 * 00014 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 00015 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 00016 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 00017 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES 00018 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 00019 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 00020 * OTHER DEALINGS IN THE SOFTWARE. 00021 * 00022 * Except as contained in this notice, the name of Maxim Integrated 00023 * Products, Inc. shall not be used except as stated in the Maxim Integrated 00024 * Products, Inc. Branding Policy. 00025 * 00026 * The mere transfer of this software does not imply any licenses 00027 * of trade secrets, proprietary technology, copyrights, patents, 00028 * trademarks, maskwork rights, or any other form of intellectual 00029 * property whatsoever. Maxim Integrated Products, Inc. retains all 00030 * ownership rights. 00031 ******************************************************************************* 00032 */ 00033 #include "MAX30205.h" 00034 00035 //****************************************************************************** 00036 MAX30205::MAX30205(PinName sda, PinName scl, int slaveAddress) : 00037 slaveAddress(slaveAddress) { 00038 i2c = new I2C(sda, scl); 00039 isOwner = true; 00040 i2c->frequency(100000); 00041 } 00042 00043 //****************************************************************************** 00044 MAX30205::MAX30205(I2C *i2c, int slaveAddress) : slaveAddress(slaveAddress) { 00045 this->i2c = i2c; 00046 i2c->frequency(100000); 00047 isOwner = false; 00048 } 00049 00050 //****************************************************************************** 00051 MAX30205::~MAX30205(void) { 00052 if (isOwner == true) { 00053 delete i2c; 00054 } 00055 } 00056 00057 //****************************************************************************** 00058 int MAX30205::reg_write(char reg, char value) { 00059 int result; 00060 char cmdData[2] = {(char)reg, value}; 00061 result = i2c->write(slaveAddress, cmdData, 2); 00062 if (result != 0) return -1; 00063 return 0; 00064 } 00065 00066 //****************************************************************************** 00067 int MAX30205::reg_write16(char reg, uint16_t value) { 00068 int result; 00069 char hi = (value >> 8) & 0xFF; 00070 char lo = value & 0xFF; 00071 char cmdData[3] = {reg, hi, lo}; 00072 result = i2c->write(slaveAddress, cmdData, 3); 00073 if (result != 0) return -1; 00074 return 0; 00075 } 00076 00077 //****************************************************************************** 00078 int MAX30205::reg_read(char reg, char *value) { 00079 int result; 00080 char cmdData[1] = {reg}; 00081 00082 result = i2c->write(slaveAddress, cmdData, 1); 00083 if (result != 0) return -1; 00084 result = i2c->read(slaveAddress, value, 1); 00085 if (result != 0) return -1; 00086 return 0; 00087 } 00088 00089 //****************************************************************************** 00090 int MAX30205::reg_read16(char reg, uint16_t *value) { 00091 int result; 00092 char data[2]; 00093 char cmdData[1] = {reg}; 00094 result = i2c->write(slaveAddress, cmdData, 1); 00095 if (result != 0) return -1; 00096 result = i2c->read(slaveAddress, data, 2); 00097 if (result != 0) return -1; 00098 *value = (data[0] << 8) + data[1]; 00099 return 0; 00100 } 00101 00102 //****************************************************************************** 00103 int MAX30205::readTemperature(uint16_t *value) { 00104 uint8_t data[2]; 00105 int status; 00106 status = reg_read16(MAX30205_Temperature, (uint16_t *)&data); 00107 *value = (data[0] << 8) + data[1]; 00108 return status; 00109 } 00110 00111 //****************************************************************************** 00112 float MAX30205::toCelsius(unsigned int rawTemp) { 00113 float val; 00114 float val1, val2; 00115 val1 = (float)(rawTemp >> 8); 00116 val2 = (float)(rawTemp & 0xFF); 00117 val = val2 + (val1 / 256.0f); 00118 return val; 00119 } 00120 00121 //****************************************************************************** 00122 float MAX30205::toFahrenheit(float temperatureC) { 00123 return temperatureC * 9.0f / 5.0f + 32.0f; 00124 } 00125 00126 //****************************************************************************** 00127 int MAX30205::reg_THYST_Read(uint16_t *value) { 00128 return reg_read16(MAX30205_THYST, value); 00129 } 00130 00131 //****************************************************************************** 00132 int MAX30205::reg_THYST_Write(uint16_t value) { 00133 return reg_write16(MAX30205_THYST, value); 00134 }
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