STM32H743VIT6 Read VBat with ADC3 using DMA don`t work in CubeIDE 2.2.1

[josevsan]

Hello, I have a problem reading VBat voltage with ADC3 and DMA in STM32H743VIT6

If i compile with CubeIDE 1.17.0 and FW 1.12.1 my program works as spected, but if i compile with last CubeIDE 2.1.1 and last FW 1.13.0 my program enter in a infinite loop related to DMA and never execute the while(1) loop.

Can anybody help me?

Thanks in advance.

regards Jose.

My program is very simple (see below):

in main.c:

/* USER CODE BEGIN 2 */
HAL_ADC_Start_DMA(&hadc3, &VBat_ChAna, 2);

/* USER CODE END 2 */

/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{

Vbat = 4 * (((VBat_ChAna &0xffff) * 3300) / 0xFFFF);/* Convert the result from 16 bit value to the voltage dimension (mV unit) *//* Vref = 3.3 V.*/

/* USER CODE END WHILE */

/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */

ADC3 configurationADC3 DMA configuration

[mƎALLEm]

Hello,

---

@josevsan wrote:

my program enter in a infinite loop related to DMA and never execute the while(1) loop.

 Which DMA infinite loop?

[TDK · Accepted solution]

> sConfig.SamplingTime = ADC_SAMPLETIME_1CYCLE_5;

Slow down the rate of conversions so it isn't stuck in interrupts forever.

[josevsan]

Thanks for your answer. I change SamplingTime to maximum   810.5 cycles and now works.

My ""DMA infinite loop" seams the processor where stuck in DMA interrupts forewer as you say.