STM32F746, ADC

Hi s.boris,

Hello, I run the ADC with DMA but there is a problem. DMA buffer is not refresh completely after the first run, I use two channels. I start ADC on every 100us, and this part is working. This is the code that is not working

static void hw_adc_3_dma_init(DMA_HandleTypeDef* _hdma, ADC_HandleTypeDef* _hadc)

{

__HAL_RCC_DMA2_CLK_ENABLE();


_hdma->Instance = DMA2_Stream0; // Set which DMA and stream will be init

_hdma->Init.Channel = DMA_CHANNEL_2; // Set DMA channel

_hdma->Init.Direction = DMA_PERIPH_TO_MEMORY; // Set DMA data transfer direction

_hdma->Init.PeriphInc = DMA_PINC_DISABLE; // Set DMA peripheral increment mode

_hdma->Init.MemInc = DMA_MINC_ENABLE; // Set DMA memory increment mode

_hdma->Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD; // Set DMA peripheral data size 16 bit

_hdma->Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD; // Set DMA memory data size 16 bit

_hdma->Init.Mode = DMA_NORMAL; // Set DMA mode. Should be one shot

_hdma->Init.Priority = DMA_PRIORITY_MEDIUM; // Set DMA priority

_hdma->Init.FIFOMode = DMA_FIFOMODE_DISABLE; // Set DMA direct mode

_hdma->Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL; // Set DMA FIFO threshold lvl

_hdma->Init.MemBurst = DMA_MBURST_SINGLE; // Set DMA memory burst

_hdma->Init.PeriphBurst = DMA_PBURST_SINGLE; // Set DMA peripheral burst


HAL_DMA_Init(_hdma); // Init DMA with selected value of registers


__HAL_LINKDMA(_hadc, DMA_Handle, *_hdma); // Associate init DMA handle to ADC DMA


// Set DMA priority

// When 2 interrupts have same preemption priority, then he one who has higher sub priority will be execute first.

// If both interrupts both have same preemption priority and sub priority, the one comes first will be execute first

HAL_NVIC_SetPriority(DMA2_Stream0_IRQn, 1, 0);

HAL_NVIC_EnableIRQ(DMA2_Stream0_IRQn);

}


void hw_adc_3_start()

{

HAL_ADC_Start_DMA(&hadc3, (U32 *)&adc_3_convert_value[0],150); 

}


void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* _handler)

{

if (_handler == &hadc1)

{

__HAL_ADC_DISABLE(&hadc1);

hw_adc_process(adc_1, &adc_status_1);

}

else if (_handler == &hadc2)

{

__HAL_ADC_DISABLE(&hadc2);

hw_adc_process(adc_2, &adc_status_2);

}

else if (_handler == &hadc3)

{

__HAL_ADC_DISABLE(&hadc3);

hw_adc_process(adc_3, &adc_status_3);

}

}