Posted on August 05, 2016 at 10:35
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);
}
}
