Yasubumi KANAZAWA / Mbed 2 deprecated LPC824_TMP102_test

TMP102 temperature sensor test using LPC824.

Dependencies:   test_TMP102 mbed

main.cpp

Committer:
yasubumi
Date:
2017-11-19
Revision:
1:3241f6a5a51e
Parent:
0:26352a9cd499
Child:
2:40c813b1d6a3

File content as of revision 1:3241f6a5a51e:

#include "mbed.h"

// TMP102 I2C slave address(ADD0 connected to GND)
#define ADDR_TMP102     0x90

// TMP102 registers
#define TMP102_Temp     0x00
#define TMP102_Conf     0x01
#define TMP102_Tlow     0x02
#define TMP102_Thigh    0x03

// Init I2C (SDA: dp4, SCL: dp5)
I2C i2c(dp4, dp5);

int main() {    
    while(1) {
        i2c.write(ADDR_TMP102, 0x00, 1); //Pointer to the temperature register

        char reg[2]={0,0};
        i2c.read(ADDR_TMP102, reg, 2); // read two bytes data

        // calculate temperature
        int16_t res = ((int8_t)reg[0] << 4) | ((uint8_t)reg[1] >> 4);
        float temp = (float) ((float)res * 0.0625);

        printf("Temp: %f\n\r", temp);
        wait(1.0);
    }
}