Components / TMP102

Library for TMP102 temperature I2C sensor

Dependents:   mbed_Shield_LCD_Temperature mbed_Shield_Temperature

Fork of TMP102 by Chris Styles

TMP102.cpp@1:7585766ad401, 2012-07-21 (annotated)

Committer:
chris
Date:
Sat Jul 21 22:40:40 2012 +0000
Revision:
1:7585766ad401
Parent:
0:374d9678d5ad
Child:
2:40e813248518
Removed extra declaration of I2C interface

Who changed what in which revision?

UserRevisionLine numberNew contents of line
chris 0:374d9678d5ad 1
chris 0:374d9678d5ad 2 /*
chris 0:374d9678d5ad 3 Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
chris 0:374d9678d5ad 4
chris 0:374d9678d5ad 5 Permission is hereby granted, free of charge, to any person obtaining a copy
chris 0:374d9678d5ad 6 of this software and associated documentation files (the "Software"), to deal
chris 0:374d9678d5ad 7 in the Software without restriction, including without limitation the rights
chris 0:374d9678d5ad 8 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
chris 0:374d9678d5ad 9 copies of the Software, and to permit persons to whom the Software is
chris 0:374d9678d5ad 10 furnished to do so, subject to the following conditions:
chris 0:374d9678d5ad 11
chris 0:374d9678d5ad 12 The above copyright notice and this permission notice shall be included in
chris 0:374d9678d5ad 13 all copies or substantial portions of the Software.
chris 0:374d9678d5ad 14
chris 0:374d9678d5ad 15 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
chris 0:374d9678d5ad 16 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
chris 0:374d9678d5ad 17 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
chris 0:374d9678d5ad 18 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
chris 0:374d9678d5ad 19 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
chris 0:374d9678d5ad 20 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
chris 0:374d9678d5ad 21 THE SOFTWARE.
chris 0:374d9678d5ad 22 */
chris 0:374d9678d5ad 23
chris 0:374d9678d5ad 24 #include "TMP102.h"
chris 0:374d9678d5ad 25
chris 0:374d9678d5ad 26 #define TEMP_REG_ADDR 0x00
chris 0:374d9678d5ad 27
chris 0:374d9678d5ad 28 TMP102::TMP102(PinName sda, PinName scl, int addr) : m_i2c(sda, scl), m_addr(addr)
chris 0:374d9678d5ad 29 {
chris 0:374d9678d5ad 30
chris 0:374d9678d5ad 31 }
chris 0:374d9678d5ad 32
chris 0:374d9678d5ad 33 TMP102::~TMP102()
chris 0:374d9678d5ad 34 {
chris 0:374d9678d5ad 35
chris 0:374d9678d5ad 36 }
chris 0:374d9678d5ad 37
chris 0:374d9678d5ad 38 float TMP102::read()
chris 0:374d9678d5ad 39 {
chris 0:374d9678d5ad 40
chris 0:374d9678d5ad 41 const char tempRegAddr = TEMP_REG_ADDR;
chris 0:374d9678d5ad 42
chris 0:374d9678d5ad 43 m_i2c.write(m_addr, &tempRegAddr, 1); //Pointer to the temperature register
chris 0:374d9678d5ad 44
chris 0:374d9678d5ad 45 char reg[2] = {0,0};
chris 0:374d9678d5ad 46 m_i2c.read(m_addr, reg, 2); //Rea
chris 0:374d9678d5ad 47
chris 0:374d9678d5ad 48 unsigned short res = (reg[0] << 4) | (reg[1] >> 4);
chris 0:374d9678d5ad 49
chris 0:374d9678d5ad 50 float temp = (float) ((float)res * 0.0625);
chris 0:374d9678d5ad 51
chris 0:374d9678d5ad 52 return temp;
chris 0:374d9678d5ad 53 }