CCS/TDC7201-ZAX-EVM: Unclear about measurement sequence

Tool/software: Code Composer Studio

Hi,

I am trying to run this evaluation board in Energia on a TM4C129EXL board.

I managed to read out in the rolling mode the configuration registers with the expected values.

However, when I try setting the START_MEAS bit in the TDCx_CONFIG1 register, I read it back as all 0s, and the timing registers 10h to 1Ch are all set to 0 (I am pulsing on of the TDCs with repeating pulses spaced by 12ns).

Have I neglected a step in preparation for measurement? Why am I not getting any data back in the timing registers?

Attached is my code

//Writing a new measurment into TDC config register 1
  SPI.transfer(B01000000);
  SPI.transfer(1); //I hope I got the bit order correct. This should enable a measurement
  //delay(1);
  valReturn=SPI.transfer(0);
  Serial.print(valReturn, HEX);
  Serial.print("\n\n");
  
  valReturn=SPI.transfer(B10000000 && 0x10);
  Serial.print("Reading timing register\n");
  for (int i=1;i<40;i++)
  {
    valReturn=SPI.transfer(0);
    Serial.print(valReturn, HEX);
    if (!(i%3)) Serial.print("\n");
  }
    
 SPI.end();
 Serial.end();

And the output...

Connected
0

Reading timing register
000
000
000
000
000
000
000
000
000
000
000
000
000