Solved
DMA IRQ Handler is called twice for ADC
Hi,
I am using 3 ADC modules triggered with TIM3 to start in the same time.
I read the result in the DMAx_Channely_IRQHandler function and for debug only I do a toggle in a GPIO.
I have 3 DMAx_Channely_IRQHandler functions , one for each ADC with DMA and 3 output pint that I toggle
All of the outputs are showing me that the DMAx_Channely_IRQHandler function is called twice.
I am using STM32G474 and STM32CubeIDE, with HAL.
Why is this happening and how can I fix it?
Thanks!!
HAL_ADC_Start_DMA(&hadc1, (uint32_t *)data_ADC_1, N_CH);
HAL_ADC_Start_DMA(&hadc2, (uint32_t *)data_ADC_2, N_CH);
HAL_ADC_Start_DMA(&hadc3, (uint32_t *)data_ADC_3, N_CH);
---------------
static void MX_DMA_Init(void)
{
/* DMA controller clock enable */
__HAL_RCC_DMAMUX1_CLK_ENABLE();
__HAL_RCC_DMA2_CLK_ENABLE();
__HAL_RCC_DMA1_CLK_ENABLE();
/* DMA interrupt init */
/* DMA1_Channel2_IRQn interrupt configuration */
HAL_NVIC_SetPriority(DMA1_Channel2_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(DMA1_Channel2_IRQn);
/* DMA1_Channel3_IRQn interrupt configuration */
HAL_NVIC_SetPriority(DMA1_Channel3_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(DMA1_Channel3_IRQn);
/* DMA2_Channel1_IRQn interrupt configuration */
HAL_NVIC_SetPriority(DMA2_Channel1_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(DMA2_Channel1_IRQn);
}
-------------
static void MX_ADC1_Init(void)
{
/* USER CODE BEGIN ADC1_Init 0 */
/* USER CODE END ADC1_Init 0 */
ADC_MultiModeTypeDef multimode = {0};
ADC_ChannelConfTypeDef sConfig = {0};
/* USER CODE BEGIN ADC1_Init 1 */
/* USER CODE END ADC1_Init 1 */
/** Common config
*/
hadc1.Instance = ADC1;
hadc1.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV1;
hadc1.Init.Resolution = ADC_RESOLUTION_12B;
hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
hadc1.Init.GainCompensation = 0;
hadc1.Init.ScanConvMode = ADC_SCAN_ENABLE;
hadc1.Init.EOCSelection = ADC_EOC_SEQ_CONV;
hadc1.Init.LowPowerAutoWait = DISABLE;
hadc1.Init.ContinuousConvMode = DISABLE;
hadc1.Init.NbrOfConversion = 3;
hadc1.Init.DiscontinuousConvMode = DISABLE;
hadc1.Init.ExternalTrigConv = ADC_EXTERNALTRIG_T3_TRGO;
hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_RISING;
hadc1.Init.DMAContinuousRequests = ENABLE;
hadc1.Init.Overrun = ADC_OVR_DATA_PRESERVED;
hadc1.Init.OversamplingMode = DISABLE;
if (HAL_ADC_Init(&hadc1) != HAL_OK)
{
Error_Handler();
}
/** Configure the ADC multi-mode
*/
multimode.Mode = ADC_MODE_INDEPENDENT;
if (HAL_ADCEx_MultiModeConfigChannel(&hadc1, &multimode) != HAL_OK)
{
Error_Handler();
}
/** Configure Regular Channel
*/
sConfig.Channel = ADC_CHANNEL_1;
sConfig.Rank = ADC_REGULAR_RANK_1;
sConfig.SamplingTime = ADC_SAMPLETIME_2CYCLES_5;
sConfig.SingleDiff = ADC_SINGLE_ENDED;
sConfig.OffsetNumber = ADC_OFFSET_NONE;
sConfig.Offset = 0;
if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
{
Error_Handler();
}
/** Configure Regular Channel
*/
sConfig.Rank = ADC_REGULAR_RANK_2;
if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
{
Error_Handler();
}
/** Configure Regular Channel
*/
sConfig.Rank = ADC_REGULAR_RANK_3;
if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN ADC1_Init 2 */
/* USER CODE END ADC1_Init 2 */
}
-----------
void DMA1_Channel2_IRQHandler(void)
{
/* USER CODE BEGIN DMA1_Channel2_IRQn 0 */
/* USER CODE END DMA1_Channel2_IRQn 0 */
HAL_DMA_IRQHandler(&hdma_adc2);
/* USER CODE BEGIN DMA1_Channel2_IRQn 1 */
adc22_cnt++;
data_adc2 = data_ADC_2[0];
HAL_GPIO_TogglePin(END_CONV_2_GPIO_Port, END_CONV_2_Pin);
/* USER CODE END DMA1_Channel2_IRQn 1 */
}
