Temperature Sensor in CC2533

Hi,

sorry for the delay of the answer.

The actual bit which activates the temperature sensor is bit#1 in ATEST register, not bit#0. There's a typo on the user guide which is being corrected in the new user guide version which will be released soon. Unfortunately the one currently available on the webfindicates bit#0 as the bit to activate the temp sensor. Please use bit #1.

No need to activate any other register besides the battery monitor space registers.

As a programming guide, please use the below code snippet the temperature sensor feature on CC2533:

  // Enable the temperature sensor

  ATEST = 0x2;

  // Select the batt mon input to compare the battery monitor voltage set through BATTMON_VOLTAGE field with the temperature sensor

  MONMUX = 0x1;  

  // Select the battmon voltage to compare with

  unsigned char battmon_voltage = 14;

#define BATTMON_VOLTAGE_MASK (0x1F << 1)  

  // Mask out previous set bits

  BATTMON &= ~(BATTMON_VOLTAGE_MASK);

  BATTMON |= (battmon_voltage << 1);

  // Turn on the battery monitor

  BATTMON &= ~(0x1);

  // Hold the battery monitor for at least 2 usecs

  for(unsigned int j=0; j<5000;j++)

  {

    asm("NOP");

  }

#define BATTMON_OUT_MASK (1 << 6)

  unsigned char result = ((BATTMON_OUT_MASK & BATTMON) >> 6);   

  // Turn off the battery monitor

  BATTMON |= 1;  

Hi,

       Thanks for the reply. Changed "ATEST" register values. Its working now.

Thanks and Regards,

Nikhil S.