Donatien Garnier
Library for the TI TMP102 I2C temperature sensor.
Dependents: TextLCD_HelloWorld MMEx_Challenge PCF2119_16X2_LCD_test TMP102_Serial_Logger ... more
TMP102.cpp@3:b469676e9a9e, 2010-07-23 (annotated)
- Committer:
- donatien
- Date:
- Fri Jul 23 10:46:33 2010 +0000
- Revision:
- 3:b469676e9a9e
- Parent:
- 0:d93532a1d699
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| donatien | 0:d93532a1d699 | 1 | |
| donatien | 0:d93532a1d699 | 2 | /* |
| donatien | 0:d93532a1d699 | 3 | Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com) |
| donatien | 0:d93532a1d699 | 4 | |
| donatien | 0:d93532a1d699 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy |
| donatien | 0:d93532a1d699 | 6 | of this software and associated documentation files (the "Software"), to deal |
| donatien | 0:d93532a1d699 | 7 | in the Software without restriction, including without limitation the rights |
| donatien | 0:d93532a1d699 | 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| donatien | 0:d93532a1d699 | 9 | copies of the Software, and to permit persons to whom the Software is |
| donatien | 0:d93532a1d699 | 10 | furnished to do so, subject to the following conditions: |
| donatien | 0:d93532a1d699 | 11 | |
| donatien | 0:d93532a1d699 | 12 | The above copyright notice and this permission notice shall be included in |
| donatien | 0:d93532a1d699 | 13 | all copies or substantial portions of the Software. |
| donatien | 0:d93532a1d699 | 14 | |
| donatien | 0:d93532a1d699 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| donatien | 0:d93532a1d699 | 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| donatien | 0:d93532a1d699 | 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| donatien | 0:d93532a1d699 | 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| donatien | 0:d93532a1d699 | 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| donatien | 0:d93532a1d699 | 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| donatien | 0:d93532a1d699 | 21 | THE SOFTWARE. |
| donatien | 0:d93532a1d699 | 22 | */ |
| donatien | 0:d93532a1d699 | 23 | |
| donatien | 0:d93532a1d699 | 24 | #include "TMP102.h" |
| donatien | 0:d93532a1d699 | 25 | |
| donatien | 0:d93532a1d699 | 26 | #define TEMP_REG_ADDR 0x00 |
| donatien | 0:d93532a1d699 | 27 | |
| donatien | 0:d93532a1d699 | 28 | TMP102::TMP102(PinName sda, PinName scl, int addr) : m_i2c(sda, scl), m_addr(addr) |
| donatien | 0:d93532a1d699 | 29 | { |
| donatien | 0:d93532a1d699 | 30 | |
| donatien | 0:d93532a1d699 | 31 | } |
| donatien | 0:d93532a1d699 | 32 | |
| donatien | 0:d93532a1d699 | 33 | TMP102::~TMP102() |
| donatien | 0:d93532a1d699 | 34 | { |
| donatien | 0:d93532a1d699 | 35 | |
| donatien | 0:d93532a1d699 | 36 | } |
| donatien | 0:d93532a1d699 | 37 | |
| donatien | 0:d93532a1d699 | 38 | float TMP102::read() |
| donatien | 0:d93532a1d699 | 39 | { |
| donatien | 0:d93532a1d699 | 40 | I2C temperatureIn(p9, p10); |
| donatien | 0:d93532a1d699 | 41 | |
| donatien | 0:d93532a1d699 | 42 | const char tempRegAddr = TEMP_REG_ADDR; |
| donatien | 0:d93532a1d699 | 43 | |
| donatien | 0:d93532a1d699 | 44 | m_i2c.write(m_addr, &tempRegAddr, 1); //Pointer to the temperature register |
| donatien | 0:d93532a1d699 | 45 | |
| donatien | 0:d93532a1d699 | 46 | char reg[2] = {0,0}; |
| donatien | 0:d93532a1d699 | 47 | m_i2c.read(m_addr, reg, 2); //Rea |
| donatien | 0:d93532a1d699 | 48 | |
| donatien | 0:d93532a1d699 | 49 | unsigned short res = (reg[0] << 4) | (reg[1] >> 4); |
| donatien | 0:d93532a1d699 | 50 | |
| donatien | 0:d93532a1d699 | 51 | float temp = (float) ((float)res * 0.0625); |
| donatien | 0:d93532a1d699 | 52 | |
| donatien | 0:d93532a1d699 | 53 | return temp; |
| donatien | 0:d93532a1d699 | 54 | } |