STM32L0 multi-channel ADC reading has DMA problem

[Muhammed Güler]

I am trying to read 2 channel ADC with STM32L011F4.

My ADC and DMA settings in cubemx are as follows 

my problem is that the DMA only returns the low 8 bit of the last channel.

uint16_t ADC_Reads[2] = {0};
 
	while (1)
	{
		HAL_ADC_Start_DMA(&hadc,(uint32_t *)ADC_Reads,2);
		HAL_Delay(1000);
	}

When I write the following code in the DMA IRQ handler, I can read the values.

uint16_t ADCReads[2];
char i=0;
void DMA1_Channel1_IRQHandler(void)
{
  /* USER CODE BEGIN DMA1_Channel1_IRQn 0 */
ADCReads[i] = hadc.Instance->DR;
	i = 1-i;
  /* USER CODE END DMA1_Channel1_IRQn 0 */
  HAL_DMA_IRQHandler(&hdma_adc);
  /* USER CODE BEGIN DMA1_Channel1_IRQn 1 */
 
  /* USER CODE END DMA1_Channel1_IRQn 1 */
}

EWARM live watch screen looks like below

[Javier1]

Lots of people had issues wth this, including me.

Try this out:

HAL_ADC_Start_DMA(&hadc,(uint32_t *)ADC_Reads, sizeof(ADC_Reads)/sizeof(ADC_Reads[0]));
 
 
or
 
 
HAL_ADC_Start_DMA(&hadc,(uint16_t *)ADC_Reads, sizeof(ADC_Reads)/sizeof(ADC_Reads[0]));

[Muhammed Güler]

it didn't work result is same

[Muhammed Güler · Accepted solution]

https://community.st.com/s/question/0D53W00001EzCmCSAV/mxdmainit-order-in-the-mainc-file-generated-by-stm32cubemx-how-to-fix

I found the problem

[Javier1]

select yourself as best answer then