Posted on October 26, 2015 at 14:03We have tested this on different boards and with different signal sources. The behaviour stays the same.
And this is the missing configuration and start code.
configuration code:
else if(hadc->Instance==ADC3)
{
/* USER CODE BEGIN ADC3_MspInit 0 */
/* USER CODE END ADC3_MspInit 0 */
/* Peripheral clock enable */
__ADC3_CLK_ENABLE();
/**ADC3 GPIO Configuration
PA0/WKUP ------> ADC3_IN0
PA2 ------> ADC3_IN2
*/
GPIO_InitStruct.Pin = SIGNAL_IN_I_Pin|SIGNAL_IN_Q_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* Peripheral DMA init*/
hdma_adc3.Instance = DMA2_Stream1;
hdma_adc3.Init.Channel = DMA_CHANNEL_2;
hdma_adc3.Init.Direction = DMA_PERIPH_TO_MEMORY;
hdma_adc3.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_adc3.Init.MemInc = DMA_MINC_ENABLE;
hdma_adc3.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;
hdma_adc3.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;
hdma_adc3.Init.Mode = DMA_CIRCULAR;
hdma_adc3.Init.Priority = DMA_PRIORITY_LOW;
hdma_adc3.Init.FIFOMode = DMA_FIFOMODE_ENABLE;
hdma_adc3.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL;
hdma_adc3.Init.MemBurst = DMA_MBURST_SINGLE;
hdma_adc3.Init.PeriphBurst = DMA_PBURST_SINGLE;
HAL_DMA_Init(&hdma_adc3);
__HAL_LINKDMA(hadc,DMA_Handle,hdma_adc3);
/* Peripheral interrupt init*/
HAL_NVIC_SetPriority(ADC_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(ADC_IRQn);
/* USER CODE BEGIN ADC3_MspInit 1 */
/* USER CODE END ADC3_MspInit 1 */
}
start code:
void startInputADC(uint32_t* memory, uint32_t size) {
if(HAL_ADC_Start(&hadc3) != HAL_OK) {
printf(''error starting ADC3'');
}
if (HAL_ADC_Start_DMA(&hadc3, memory, size) != HAL_OK) {
printf(''error starting DMA for ADC3'');
}
if (HAL_ADC_Start_IT(&hadc3) != HAL_OK) {
printf(''error starting interrupts for ADC3'');
}
}
