STM32u575 GPIO and DAC output using a timer triggered DMA

[eosella]

Hi everyone

I'm trying to get involed with the nulceo STM32u575 board developing an application that should perform synchronously a GPIOB pins output configurations over time (periodic) and set a specific analog value to each GPIO pins, So ideally I'd have two arrays, one for the DAC and the second for the GPIO, and a Timer instance that triggers the GPIO pattern and sets the DAC output value. I was considering performing this using a couple of Timer triggered instances, one for the GPIO and the other for the DAC.

 

By now, I started with the GPIO stuffs, and I'm able to configure the timer (checking the callback function), but I'm not getting the GPIO ouputs...

In the main function:

/* USER CODE BEGIN 2 */
uint32_t gpiovals[it_max] = {PB0_Pin | PB1_Pin, PB1_Pin | PB2_Pin, PB2_Pin | PB4_Pin, PB2_Pin | PB4_Pin, PB4_Pin, PB0_Pin , PB1_Pin, PB2_Pin};

TIM2->DIER |= (1<<8);// set UDE bit (update DMA request enable)
__HAL_TIM_ENABLE_DMA(&htim2, TIM_DMA_TRIGGER);
HAL_DMA_Start_IT(&handle_GPDMA1_Channel10, (uint32_t)gpiovals, (uint32_t)&(GPIOB->BSRR), it_max);
HAL_TIM_Base_Start_IT(&htim2);

/* USER CODE END 2 */

And attached, I left the ioc file. Any help will be appreciated!

 

Thanks in advance

[eosella]

Hi xxxxx  and thanks for your reply.  [was a reply to a spammer]

All the three (timer, GPDMA, and GPIOs) are configured using the device configuration tool in the stm32CubeIDE, and the initialization were delivered without additional modifications.

Now I've added a the extl line 13 for the GPIOs interruptions but without any change.

I understand that transfer values are configured in

 

 HAL_DMA_Start(&handle_GPDMA1_Channel10, (uint32_t)gpiovals, (uint32_t)&(GPIOB->BSRR), it_max);

 

and the direction is configured as memory to peripheral.

I don't know how to specifically check wether the timer is triggering the DMA, but I've checked that the timer is running, by implementing the callback function:

 

void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim){
	static uint16_t iter=0;
	iter= (iter+1)%it_max;
	if(htim->Instance == TIM2)
	{
		HAL_GPIO_TogglePin(LED_BLUE_GPIO_Port, LED_BLUE_Pin);
		HAL_GPIO_TogglePin(GPIOB, PB0_Pin); // this was used to check if the GPIO pin was well configured

	}
}

 

I've attached the IOC file again.

Any additional help will be appreciated :)