(Problem sloved!)ADC multiple channel convert value with DMA transfer problem

[NVoid.1]

Hello everyone.

Recently I started to use LL library & STM32CubeIDE to do my project.

I'm trying to use DMA to transfer data which converted from ADC multiple channel from peripheral to memory.

the DMA data is total wrong, converted data is almost the same. I searched a lot, but I can't fix it.

the DMA data is fine when I convert single channel.

really need some help...

mcu f103ve

Scan conversion mode ON

Continuous conversion mode ON

Number of conversion 6

trigger by software

here is the code.

void MX_ADC1_Init(void)

{

 /* USER CODE BEGIN ADC1_Init 0 */

 /* USER CODE END ADC1_Init 0 */

 LL_ADC_InitTypeDef ADC_InitStruct = {0};

 LL_ADC_CommonInitTypeDef ADC_CommonInitStruct = {0};

 LL_ADC_REG_InitTypeDef ADC_REG_InitStruct = {0};

 LL_GPIO_InitTypeDef GPIO_InitStruct = {0};

 /* Peripheral clock enable */

 LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_ADC1);

 LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_GPIOC);

 /**ADC1 GPIO Configuration

 PC0  ------> ADC1_IN10

 PC1  ------> ADC1_IN11

 PC2  ------> ADC1_IN12

 PC3  ------> ADC1_IN13

 PC4  ------> ADC1_IN14

 PC5  ------> ADC1_IN15

 */

 GPIO_InitStruct.Pin = LL_GPIO_PIN_0|LL_GPIO_PIN_1|LL_GPIO_PIN_2|LL_GPIO_PIN_3

             |LL_GPIO_PIN_4|LL_GPIO_PIN_5;

 GPIO_InitStruct.Mode = LL_GPIO_MODE_ANALOG;

 LL_GPIO_Init(GPIOC, &GPIO_InitStruct);

 /* ADC1 DMA Init */

 /* ADC1 Init */

 LL_DMA_SetDataTransferDirection(DMA1, LL_DMA_CHANNEL_1, LL_DMA_DIRECTION_PERIPH_TO_MEMORY);

 LL_DMA_SetChannelPriorityLevel(DMA1, LL_DMA_CHANNEL_1, LL_DMA_PRIORITY_LOW);

 LL_DMA_SetMode(DMA1, LL_DMA_CHANNEL_1, LL_DMA_MODE_CIRCULAR);

 LL_DMA_SetPeriphIncMode(DMA1, LL_DMA_CHANNEL_1, LL_DMA_PERIPH_NOINCREMENT);

 LL_DMA_SetMemoryIncMode(DMA1, LL_DMA_CHANNEL_1, LL_DMA_MEMORY_INCREMENT);

 LL_DMA_SetPeriphSize(DMA1, LL_DMA_CHANNEL_1, LL_DMA_PDATAALIGN_HALFWORD);

 LL_DMA_SetMemorySize(DMA1, LL_DMA_CHANNEL_1, LL_DMA_MDATAALIGN_HALFWORD);

 /* USER CODE BEGIN ADC1_Init 1 */

 LL_DMA_ConfigAddresses(DMA1, LL_DMA_CHANNEL_1, LL_ADC_DMA_GetRegAddr(ADC1, LL_ADC_DMA_REG_REGULAR_DATA), (uint32_t)voltageRawValue, LL_DMA_DIRECTION_PERIPH_TO_MEMORY);

 LL_DMA_SetDataLength(DMA1, LL_DMA_CHANNEL_1, 6);

 LL_DMA_EnableChannel(DMA1, LL_DMA_CHANNEL_1);

// my code here

 /* USER CODE END ADC1_Init 1 */

 /** Common config

 */

 ADC_InitStruct.DataAlignment = LL_ADC_DATA_ALIGN_RIGHT;

 ADC_InitStruct.SequencersScanMode = LL_ADC_SEQ_SCAN_ENABLE;

 LL_ADC_Init(ADC1, &ADC_InitStruct);

 ADC_CommonInitStruct.Multimode = LL_ADC_MULTI_INDEPENDENT;

 LL_ADC_CommonInit(__LL_ADC_COMMON_INSTANCE(ADC1), &ADC_CommonInitStruct);

 ADC_REG_InitStruct.TriggerSource = LL_ADC_REG_TRIG_SOFTWARE;

 ADC_REG_InitStruct.SequencerLength = LL_ADC_REG_SEQ_SCAN_ENABLE_6RANKS;

 ADC_REG_InitStruct.SequencerDiscont = LL_ADC_REG_SEQ_DISCONT_DISABLE;

 ADC_REG_InitStruct.ContinuousMode = LL_ADC_REG_CONV_CONTINUOUS;

 ADC_REG_InitStruct.DMATransfer = LL_ADC_REG_DMA_TRANSFER_UNLIMITED;

 LL_ADC_REG_Init(ADC1, &ADC_REG_InitStruct);

 /** Configure Regular Channel

 */

 LL_ADC_REG_SetSequencerRanks(ADC1, LL_ADC_REG_RANK_1, LL_ADC_CHANNEL_11);

 LL_ADC_SetChannelSamplingTime(ADC1, LL_ADC_CHANNEL_11, LL_ADC_SAMPLINGTIME_1CYCLE_5);

 /** Configure Regular Channel

 */

 LL_ADC_REG_SetSequencerRanks(ADC1, LL_ADC_REG_RANK_2, LL_ADC_CHANNEL_10);

 LL_ADC_SetChannelSamplingTime(ADC1, LL_ADC_CHANNEL_10, LL_ADC_SAMPLINGTIME_1CYCLE_5);

 /** Configure Regular Channel

 */

 LL_ADC_REG_SetSequencerRanks(ADC1, LL_ADC_REG_RANK_3, LL_ADC_CHANNEL_10);

 LL_ADC_SetChannelSamplingTime(ADC1, LL_ADC_CHANNEL_10, LL_ADC_SAMPLINGTIME_1CYCLE_5);

 /** Configure Regular Channel

 */

 LL_ADC_REG_SetSequencerRanks(ADC1, LL_ADC_REG_RANK_4, LL_ADC_CHANNEL_10);

 LL_ADC_SetChannelSamplingTime(ADC1, LL_ADC_CHANNEL_10, LL_ADC_SAMPLINGTIME_1CYCLE_5);

 /** Configure Regular Channel

 */

 LL_ADC_REG_SetSequencerRanks(ADC1, LL_ADC_REG_RANK_5, LL_ADC_CHANNEL_10);

 LL_ADC_SetChannelSamplingTime(ADC1, LL_ADC_CHANNEL_10, LL_ADC_SAMPLINGTIME_1CYCLE_5);

 /** Configure Regular Channel

 */

 LL_ADC_REG_SetSequencerRanks(ADC1, LL_ADC_REG_RANK_6, LL_ADC_CHANNEL_10);

 LL_ADC_SetChannelSamplingTime(ADC1, LL_ADC_CHANNEL_10, LL_ADC_SAMPLINGTIME_1CYCLE_5);

 /* USER CODE BEGIN ADC1_Init 2 */

 LL_ADC_Enable(ADC1);

 LL_ADC_StartCalibration(ADC1);

 while(LL_ADC_IsCalibrationOnGoing(ADC1));

 LL_ADC_REG_StartConversionSWStart(ADC1);

//my code here

 /* USER CODE END ADC1_Init 2 */

}

/* USER CODE BEGIN 1 */

/* USER CODE END 1 */

 while (1)

 {

  /* USER CODE END WHILE */

  /* USER CODE BEGIN 3 */

 for(int i = 0; i < 6; i++)

 {

 voltageValue[i] = __LL_ADC_CALC_DATA_TO_VOLTAGE(3300, voltageRawValue[i], LL_ADC_RESOLUTION_12B);

 printf("%d ", voltageValue[i]);

 }

 printf("\n");

 LL_mDelay(200);

// my code here

 }

 /* USER CODE END 3 */

}

[Amel NASRI]

Hi @NVoid.1​ ,

Glad to know that your problem is fixed!

It will be interesting to share with other Community members the solution you found for the issue you were facing.

-Amel