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STM32H745 Nucleo: ADC with DMA don't work

Andre And over 4 years ago

Hi! I have STM32H745 Nucleo and i want to transfer data from ADC via DMA.

1. At first i write code for ADC with out DMA (ADC3, PF10 in) and it work excellent. I get positive knovlege.

2. At second step i tried to use DMA (DMA1 stream 1, PF10, ADC3), but code don't work.

It is code with DMA:

void ADC3_DMA_Config(void)

{

GPIO_InitTypeDef GPIO_InitStruct;

static DMA_HandleTypeDef DmaHandle;

/* ADC handler declaration */

ADC_HandleTypeDef AdcHandle_singl;

ADC_ChannelConfTypeDef sConfig;

__HAL_RCC_GPIOF_CLK_ENABLE() ;

__HAL_RCC_ADC3_CLK_ENABLE() ;

__HAL_RCC_ADC_CONFIG(RCC_ADCCLKSOURCE_CLKP);

__HAL_RCC_DMA1_CLK_ENABLE();

GPIO_InitStruct.Pin = GPIO_PIN_10 ;

GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;

GPIO_InitStruct.Pull = GPIO_NOPULL;

HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);

DmaHandle.Instance = DMA1_Stream1;

DmaHandle.Init.Request = DMA_REQUEST_ADC3;

DmaHandle.Init.Direction = DMA_PERIPH_TO_MEMORY;

DmaHandle.Init.PeriphInc = DMA_PINC_DISABLE;

// DMA1_Stream1->PAR = (uint32_t)&ADC3->DR;

// DMA1_Stream1->M0AR = (uint32_t)&ADC1ConvertedValue;

DmaHandle.Init.MemInc = DMA_MINC_ENABLE;

DmaHandle.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;

DmaHandle.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;

DmaHandle.Init.Mode = DMA_CIRCULAR;

DmaHandle.Init.Priority = DMA_PRIORITY_HIGH;

HAL_DMA_DeInit(&DmaHandle);

HAL_DMA_Init(&DmaHandle);

DMAMUX1_Channel1->CCR|= 115U;; //stream 1 29 ????

//DMAMUX1_Channel1->CCR = (115u << DMAMUX_CxCR_DMAREQ_ID_Pos);

DMA1_Stream1->CR |= DMA_SxCR_EN;

AdcHandle_singl.Instance = ADC3;

AdcHandle_singl.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV2;

AdcHandle_singl.Init.Resolution = ADC_RESOLUTION_16B;

AdcHandle_singl.Init.ScanConvMode = DISABLE;

AdcHandle_singl.Init.EOCSelection = ADC_EOC_SINGLE_CONV;

AdcHandle_singl.Init.LowPowerAutoWait = DISABLE;

AdcHandle_singl.Init.ContinuousConvMode = ENABLE ;

AdcHandle_singl.Init.NbrOfConversion = 1;

AdcHandle_singl.Init.DiscontinuousConvMode = DISABLE;

AdcHandle_singl.Init.NbrOfDiscConversion = 1;

AdcHandle_singl.Init.ExternalTrigConv = ADC_SOFTWARE_START; ;

AdcHandle_singl.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;

AdcHandle_singl.Init.ConversionDataManagement = ADC_CONVERSIONDATA_DMA_CIRCULAR;

AdcHandle_singl.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN;

AdcHandle_singl.Init.OversamplingMode = DISABLE;

if (HAL_ADC_Init(&AdcHandle_singl) != HAL_OK)

{

; //Error_Handler();

}

/* ### - 2 - Start calibration ############################################ */

if (HAL_ADCEx_Calibration_Start(&AdcHandle_singl, ADC_CALIB_OFFSET, ADC_SINGLE_ENDED) != HAL_OK)

{

; //Error_Handler();

}

sConfig.Channel = ADC_CHANNEL_6; //ADC3_CHANNELa; /* Sampled channel number */

sConfig.Rank = ADC_REGULAR_RANK_1; /* Rank of sampled channel number ADCx_CHANNEL */

sConfig.SamplingTime = ADC_SAMPLETIME_8CYCLES_5; /* Minimum sampling time */

sConfig.SingleDiff = ADC_SINGLE_ENDED; /* Single-ended input channel */

sConfig.OffsetNumber = ADC_OFFSET_NONE; /* No offset subtraction */

sConfig.Offset = 0; /* Parameter discarded because offset correction is disabled */

if (HAL_ADC_ConfigChannel(&AdcHandle_singl, &sConfig) != HAL_OK)

{

; //Error_Handler();

}

/* ### - 4 - Start conversion in DMA mode ################################# */

if (HAL_ADC_Start_DMA(&AdcHandle_singl,

(uint32_t *)aADCxConvertedData,

ADC_CONVERTED_DATA_BUFFER_SIZE

) != HAL_OK)

{

; //Error_Handler();

}