STM32G431KB DAC DMA not working

[PBieg.1]

Trying to get a basic sample DAC1 with DMA, triggered by TIM2 working.

This should be trivial, works fine on SMT32F3. I'm using a Nucleo-32 SMT32G431.

Using Cube IDE. The only non IDE-generated code in main is:

  /* USER CODE BEGIN 2 */
 
  static uint16_t x[4];
  x[0]= 100;
  x[1]= 1000;
  x[2]= 2000;
  x[3]= 3000;
 
  HAL_TIM_Base_Start_IT(&htim2);
  HAL_DAC_Start_DMA(&hdac1, DAC_CHANNEL_1, (uint32_t*)x, 4, DAC_ALIGN_12B_R);
 
  /* USER CODE END 2 */

IOC configuration:

• DAC with output buffer (verified, works fine in non-DMA mode)
• circular DMA buffer, 1/2 word
• trigger: TIM2 update
• TIM2: set to count up to 500, internal clock (works, verified by reading the clock)

Compared to some DAC/DMA examples - everything seems fine (and works on a Nucleo-32 SMT32F3. Please help - this is extremely frustrating and has held up a a project for 3 days.

test1.ioc and main.c files attached.

Thank you!

Paul

[rclar.6]

FOR the STM32G series: I found out what this was. In the GUI you have to make the word size WORD even though its a 12 bit DAC. Strangely there is no error message if you try to use half word AND when you run the code it simply does not start. Subtle one.

[Paul3]

That worked for me i.e. changing Half Word to Word. Thanks!