TMP102.cpp

00001 /* Copyright (C) 2016,Edutech IoT Team, mbed.org, MIT License
00002  *
00003  * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
00004  * and associated documentation files (the "Software"), to deal in the Software without restriction,
00005  * including without limitation the rights to use, copy, modify, merge, publish, distribute,
00006  * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
00007  * furnished to do so, subject to the following conditions:
00008  *
00009  * The above copyright notice and this permission notice shall be included in all copies or
00010  * substantial portions of the Software.
00011  *
00012  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
00013  * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00014  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
00015  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00016  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00017  */
00018 
00019 #include "TMP102.h"
00020 
00021 #define TEMP_REG_ADDR 0x00
00022 
00023 TMP102::TMP102(PinName sda, PinName scl, int addr) : m_i2c(sda, scl), m_addr(addr)
00024 {
00025 
00026 }
00027 
00028 TMP102::~TMP102 ()
00029 {
00030 
00031 }
00032 
00033 
00034 float TMP102::read_12b()
00035 {
00036   const char tempRegAddr = TEMP_REG_ADDR;
00037 
00038   m_i2c.write(m_addr, &tempRegAddr, 1); //Pointer to the temperature register
00039 
00040   char reg[2] = {0,0};
00041   m_i2c.read(m_addr, reg, 2); //Rea
00042 
00043   int16_t res  = ((int8_t)reg[0] << 4) | ((uint8_t)reg[1] >> 4);
00044 
00045   float temp =  (float) ((float)res * 0.0625);
00046 
00047   return temp;
00048 }
00049 
00050 
00051 float TMP102::read_13b()
00052 {
00053   const char tempRegAddr = TEMP_REG_ADDR;
00054 
00055   m_i2c.write(m_addr, &tempRegAddr, 1); //Pointer to the temperature register
00056 
00057   char reg[2] = {0,0};
00058   m_i2c.read(m_addr, reg, 2); //Rea
00059 
00060   int16_t res  = ((int8_t)reg[0] << 5) | ((uint8_t)reg[1] >> 3);
00061 
00062   float temp =  (float) ((float)res * 0.0625);
00063 
00064   return temp;
00065 }