tmk_core/tool/mbed/mbed-sdk/libraries/tests/peripherals/TMP102/TMP102.cpp

   1 #include "TMP102.h"
   2
   3 #define TEMP_REG_ADDR 0x00
   4
   5 TMP102::TMP102(PinName sda, PinName scl, int addr) : m_i2c(sda, scl), m_addr(addr) {
   6     m_i2c.frequency(400000);
   7 }
   8 TMP102::~TMP102() { }
   9
  10 float TMP102::read() {
  11     const char tempRegAddr = TEMP_REG_ADDR;
  12
  13     m_i2c.write(m_addr, &tempRegAddr, 1);
  14
  15     char reg[2] = {0,0};
  16     m_i2c.read(m_addr, reg, 2);
  17
  18     unsigned short res = (reg[0] << 4) | (reg[1] >> 4);
  19
  20     float temp =  (float) ((float)res * 0.0625);
  21
  22     return temp;
  23 }