CC2650: Measuring HDC1080 via I2C with CC2650LAUNCHPAD on Sensor Controller Studio

Hello,

I have been trying to get some measurements from a HDC1080 in Sensor Controller Studio but no success. I've followed the ALS I2C example and looked at others with similar problems on the forums but I haven't found a solution yet. 

Could someone please take a look at the code and tell me if I'm doing anything wrong? I'm fairly new to this so it may be something very simple.

I've done a quick check of the voltage levels and they seem OK, however I don't have a logic analyzer to go any further. 

When I run the Task Tester, the Humidity value goes to 1 and i2cStatus also goes to 1 and then stays there.

Configuration register is left as default.

// Trigger temperature read
i2cStart();
i2cTx(PMOD_I2C_ADDR | I2C_OP_WRITE); // 0x0040 << 1
i2cTx(PMOD_REG_TEMP); // 0x0000
fwDelayUs(15000,FW_DELAY_RANGE_20_MS); // Conversion time of temperature and humidity measurement

// Read temperature value, then humidity
if (state.i2cStatus == 0) {
    U16 TEMP_MSB;
    U16 TEMP_LSB;
    U16 HUM_MSB;
    U16 HUM_LSB;
    
    i2cRepeatedStart();
    i2cTx(PMOD_I2C_ADDR | I2C_OP_READ); // 0x0040 << 1
    i2cRxAck(TEMP_MSB);
    i2cRxAck(TEMP_LSB);
    i2cRxAck(HUM_MSB);
    i2cRxNack(HUM_LSB);
    i2cStop();
        
    U16 TEMP_RESULT;
    U16 HUM_RESULT;
        
    TEMP_RESULT = (TEMP_MSB << 8) | TEMP_LSB;
    HUM_RESULT = (HUM_MSB << 8) | HUM_LSB;
        
    output.tempResult = TEMP_RESULT;
    output.humResult = HUM_RESULT;
    
} else {
    i2cStop();
} 
   
i2cStop();

// Run-time logging: Log the output data structure
rtlLogStructs(BV_RTL_LOG_OUTPUT);

// Schedule the next execution
fwScheduleTask(1);

Thanks!

Mike