I want to enable it for value number o to 99

if (pin < A0) {
    pin += A0;
  }

  pinPeripheral(pin, PIO_ANALOG);

  if (pin == A0) { // Disable DAC, if analogWrite(A0,dval) used previously the DAC is enabled
    syncDAC();
    DAC->CTRLA.bit.ENABLE = 0x00; // Disable DAC
    //DAC->CTRLB.bit.EOEN = 0x00; // The DAC output is turned off.
    syncDAC();
  }
