CubeIDE 1.1.0
STM32Cube_FW_WB_V1.3.0
Trying to make DMA transfer ADC results.
I'm putting code in main() after MX_..._Init() and before while(1) {}
HAL_ADC_Start_IT(&hadc1); works fine
HAL_DMA_Start_IT(&hdma_memtomem_dma1_channel2, (uint32_t) src, (uint32_t) dest, 40); works fine too
but
HAL_ADC_Start_DMA(&hadc1, dest, 10) doesn't work as it should
ADC is activated and keeps throwing Overrun_Error
But DMA doesn't transfer anything
static void MX_ADC1_Init(void)
{
/* USER CODE BEGIN ADC1_Init 0 */
/* USER CODE END ADC1_Init 0 */
ADC_ChannelConfTypeDef sConfig = {0};
/* USER CODE BEGIN ADC1_Init 1 */
/* USER CODE END ADC1_Init 1 */
/** Common config
*/
hadc1.Instance = ADC1;
hadc1.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV8;
hadc1.Init.Resolution = ADC_RESOLUTION_12B;
hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE;
hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
hadc1.Init.LowPowerAutoWait = DISABLE;
hadc1.Init.ContinuousConvMode = ENABLE;
hadc1.Init.NbrOfConversion = 1;
hadc1.Init.DiscontinuousConvMode = DISABLE;
hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
hadc1.Init.DMAContinuousRequests = ENABLE;
hadc1.Init.Overrun = ADC_OVR_DATA_PRESERVED;
hadc1.Init.OversamplingMode = ENABLE;
hadc1.Init.Oversampling.Ratio = ADC_OVERSAMPLING_RATIO_16;
hadc1.Init.Oversampling.RightBitShift = ADC_RIGHTBITSHIFT_NONE;
hadc1.Init.Oversampling.TriggeredMode = ADC_TRIGGEREDMODE_SINGLE_TRIGGER;
hadc1.Init.Oversampling.OversamplingStopReset = ADC_REGOVERSAMPLING_CONTINUED_MODE;
if (HAL_ADC_Init(&hadc1) != HAL_OK)
{
Error_Handler();
}
/** Configure Regular Channel
*/
sConfig.Channel = ADC_CHANNEL_5;
sConfig.Rank = ADC_REGULAR_RANK_1;
sConfig.SamplingTime = ADC_SAMPLETIME_2CYCLES_5;
sConfig.SingleDiff = ADC_DIFFERENTIAL_ENDED;
sConfig.OffsetNumber = ADC_OFFSET_NONE;
sConfig.Offset = 0;
if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN ADC1_Init 2 */
/* USER CODE END ADC1_Init 2 */
}
static void MX_DMA_Init(void)
{
/* DMA controller clock enable */
__HAL_RCC_DMAMUX1_CLK_ENABLE();
__HAL_RCC_DMA1_CLK_ENABLE();
/* Configure DMA request hdma_memtomem_dma1_channel2 on DMA1_Channel2 */
hdma_memtomem_dma1_channel2.Instance = DMA1_Channel2;
hdma_memtomem_dma1_channel2.Init.Request = DMA_REQUEST_MEM2MEM;
hdma_memtomem_dma1_channel2.Init.Direction = DMA_MEMORY_TO_MEMORY;
hdma_memtomem_dma1_channel2.Init.PeriphInc = DMA_PINC_ENABLE;
hdma_memtomem_dma1_channel2.Init.MemInc = DMA_MINC_ENABLE;
hdma_memtomem_dma1_channel2.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
hdma_memtomem_dma1_channel2.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
hdma_memtomem_dma1_channel2.Init.Mode = DMA_NORMAL;
hdma_memtomem_dma1_channel2.Init.Priority = DMA_PRIORITY_LOW;
if (HAL_DMA_Init(&hdma_memtomem_dma1_channel2) != HAL_OK)
{
Error_Handler( );
}
/* DMA interrupt init */
/* DMA1_Channel1_IRQn interrupt configuration */
HAL_NVIC_SetPriority(DMA1_Channel1_IRQn, 15, 0);
HAL_NVIC_EnableIRQ(DMA1_Channel1_IRQn);
}
void HAL_ADC_MspInit(ADC_HandleTypeDef* hadc)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
if(hadc->Instance==ADC1)
{
/* USER CODE BEGIN ADC1_MspInit 0 */
/* USER CODE END ADC1_MspInit 0 */
/* Peripheral clock enable */
__HAL_RCC_ADC_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
/**ADC1 GPIO Configuration
PA0 ------> ADC1_IN5
PA1 ------> ADC1_IN6
*/
GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* ADC1 DMA Init */
/* ADC1 Init */
hdma_adc1.Instance = DMA1_Channel1;
hdma_adc1.Init.Request = DMA_REQUEST_ADC1;
hdma_adc1.Init.Direction = DMA_PERIPH_TO_MEMORY;
hdma_adc1.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_adc1.Init.MemInc = DMA_MINC_ENABLE;
hdma_adc1.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
hdma_adc1.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
hdma_adc1.Init.Mode = DMA_NORMAL;
hdma_adc1.Init.Priority = DMA_PRIORITY_HIGH;
if (HAL_DMA_Init(&hdma_adc1) != HAL_OK)
{
Error_Handler();
}
__HAL_LINKDMA(hadc,DMA_Handle,hdma_adc1);
/* USER CODE BEGIN ADC1_MspInit 1 */
/* USER CODE END ADC1_MspInit 1 */
}
}
I've tried this confuguration on PNUCLEO-WB55 Dongle in far more complex code and it worked. Now I'm using custom board and just main() body. But I think the board should not matter as DMA is totally internal thing
