How to setup a fast dacc on arduino due

[bedakno]

So, I'm trying to get the samplerate of my dacc as high as possible. I've read into the registers and got it working on the adc of my arduino due. Now I tried to do it similar on the dacc.

void dac_setup ()
{

  PMC->PMC_PCER1 = PMC_PCER1_PID38;     // DACC power ON
  DACC->DACC_CR = 0x1 ;       // Reset DACC
  DACC->DACC_MR =0x01200100; //DACC Mode Register

  DACC->DACC_IER |= 0b0010; //DACC Interrupt Enable Register

  NVIC_EnableIRQ(DACC_IRQn);               // Enable DACC interrupt
  DACC->DACC_WPMR|=0x0; //Disables write-protect for DAC
  DACC->DACC_CHDR=0x3; //Disable all channels
  DACC->DACC_CHER = 0x2;      // enable channel 1 = DAC1
}
void setup(){
dac_setup();
}
void loop() {
  while((DACC->DACC_ISR&0b0)==0); //Wait for DACC to be ready
  DACC->DACC_CDR = 0xFF;
  while((DACC->DACC_ISR&0b0)==0);
  DACC->DACC_CDR = 0x0;
}

This is the dacc-part of my code so far. Problem is, that I can't read any voltage between DAC1 (or DAC0) and ground.
Thank you in advance

[bedakno]

Hello, it's me again. While the question was online, I managed to fix it myself. Hope, I can help someone with the same problem. This is my slightly altered code:

void dac_setup ()
{
  PMC->PMC_PCER1|= PMC_PCER1_PID38; //DACC power on
  DACC->DACC_CR = DACC_CR_SWRST;       // Reset DACC
  //DACC->DACC_WPMR=0x44414300; //Disables write-protect for DAC -> enable, disable, mode, analog current register,
  //DACC->DACC_CHDR=0x3; //Disable all channels
  //DACC->DACC_MR =0xA220810; //DACC Mode Register
   DACC->DACC_MR = DACC_MR_TRGEN_DIS                   // Free running mode
                  | DACC_MR_USER_SEL_CHANNEL1         // select channel 1
                  | DACC_MR_REFRESH (1)
                  | DACC_MR_STARTUP_8
                  | DACC_MR_MAXS;
  
  NVIC_EnableIRQ(DACC_IRQn);

  DACC->DACC_CHER = DACC_CHER_CH1;      // enable channel 1 = DAC1
}
void loop(){
while(!DACC_ISR_TXRDY);
  DACC->DACC_CDR = 2047;
  while(!DACC_ISR_TXRDY);
  DACC->DACC_CDR = 1023;
}

Managed to get a samplerate of about 1 MHz.