TMP102 is I2C based Temperature Sensor
TMP102.cpp
- Committer:
- dwijaybane
- Date:
- 2016-01-25
- Revision:
- 0:640bac35614f
File content as of revision 0:640bac35614f:
/* Copyright (C) 2016,Edutech IoT Team, mbed.org, MIT License * * 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 THE AUTHORS OR COPYRIGHT HOLDERS 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. */ #include "TMP102.h" #define TEMP_REG_ADDR 0x00 TMP102::TMP102(PinName sda, PinName scl, int addr) : m_i2c(sda, scl), m_addr(addr) { } TMP102::~TMP102() { } float TMP102::read_12b() { const char tempRegAddr = TEMP_REG_ADDR; m_i2c.write(m_addr, &tempRegAddr, 1); //Pointer to the temperature register char reg[2] = {0,0}; m_i2c.read(m_addr, reg, 2); //Rea int16_t res = ((int8_t)reg[0] << 4) | ((uint8_t)reg[1] >> 4); float temp = (float) ((float)res * 0.0625); return temp; } float TMP102::read_13b() { const char tempRegAddr = TEMP_REG_ADDR; m_i2c.write(m_addr, &tempRegAddr, 1); //Pointer to the temperature register char reg[2] = {0,0}; m_i2c.read(m_addr, reg, 2); //Rea int16_t res = ((int8_t)reg[0] << 5) | ((uint8_t)reg[1] >> 3); float temp = (float) ((float)res * 0.0625); return temp; }