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STM32G4 Dual Injected Simultaneous Mode ADC2 Returns 0
I'm using STM32G474 with dual ADC injected simultaneous mode. İndividual ADC injected mode works ok.
ADC1 is triggered by TIM1 Channel 4 and the interrupt is firing correctly, but ADC2 always returns zero.
Questions:
- Why does ADC2->JDR1 always return 0 in dual injected simultaneous mode?
- Is it correct that HAL_ADCEx_InjectedStart_IT(&hadc2) returns HAL_ERROR in dual mode?
You can see my ADC1 and ADC2 configuration.
void HAL_ADCEx_InjectedConvCpltCallback(ADC_HandleTypeDef* hadc)
{
if (hadc->Instance == ADC1) {
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_SET);
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_RESET);
adc1 = ADC1->JDR1;
adc2 = ADC2->JDR1;
}
}
static void MX_ADC1_Init(void)
{
/* USER CODE BEGIN ADC1_Init 0 */
/* USER CODE END ADC1_Init 0 */
ADC_MultiModeTypeDef multimode = {0};
ADC_InjectionConfTypeDef sConfigInjected = {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_SYNC_PCLK_DIV4;
hadc1.Init.Resolution = ADC_RESOLUTION_12B;
hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
hadc1.Init.GainCompensation = 0;
hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE;
hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
hadc1.Init.LowPowerAutoWait = DISABLE;
hadc1.Init.ContinuousConvMode = DISABLE;
hadc1.Init.NbrOfConversion = 1;
hadc1.Init.DiscontinuousConvMode = DISABLE;
hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
hadc1.Init.DMAContinuousRequests = DISABLE;
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_DUALMODE_INJECSIMULT;
multimode.DMAAccessMode = ADC_DMAACCESSMODE_DISABLED;
multimode.TwoSamplingDelay = ADC_TWOSAMPLINGDELAY_1CYCLE;
if (HAL_ADCEx_MultiModeConfigChannel(&hadc1, &multimode) != HAL_OK)
{
Error_Handler();
}
/** Configure Injected Channel
*/
sConfigInjected.InjectedChannel = ADC_CHANNEL_2;
sConfigInjected.InjectedRank = ADC_INJECTED_RANK_1;
sConfigInjected.InjectedSamplingTime = ADC_SAMPLETIME_2CYCLES_5;
sConfigInjected.InjectedSingleDiff = ADC_SINGLE_ENDED;
sConfigInjected.InjectedOffsetNumber = ADC_OFFSET_NONE;
sConfigInjected.InjectedOffset = 0;
sConfigInjected.InjectedNbrOfConversion = 1;
sConfigInjected.InjectedDiscontinuousConvMode = DISABLE;
sConfigInjected.AutoInjectedConv = DISABLE;
sConfigInjected.QueueInjectedContext = DISABLE;
sConfigInjected.ExternalTrigInjecConv = ADC_EXTERNALTRIGINJEC_T1_CC4;
sConfigInjected.ExternalTrigInjecConvEdge = ADC_EXTERNALTRIGINJECCONV_EDGE_RISING;
sConfigInjected.InjecOversamplingMode = DISABLE;
if (HAL_ADCEx_InjectedConfigChannel(&hadc1, &sConfigInjected) != HAL_OK)
{
Error_Handler();
}
/** Configure Regular Channel
*/
sConfig.Channel = ADC_CHANNEL_2;
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();
}
/* USER CODE BEGIN ADC1_Init 2 */
/* USER CODE END ADC1_Init 2 */
}
/**
* @brief ADC2 Initialization Function
* None
* @retval None
*/
static void MX_ADC2_Init(void)
{
/* USER CODE BEGIN ADC2_Init 0 */
/* USER CODE END ADC2_Init 0 */
ADC_InjectionConfTypeDef sConfigInjected = {0};
/* USER CODE BEGIN ADC2_Init 1 */
/* USER CODE END ADC2_Init 1 */
/** Common config
*/
hadc2.Instance = ADC2;
hadc2.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV4;
hadc2.Init.Resolution = ADC_RESOLUTION_12B;
hadc2.Init.DataAlign = ADC_DATAALIGN_RIGHT;
hadc2.Init.GainCompensation = 0;
hadc2.Init.ScanConvMode = ADC_SCAN_DISABLE;
hadc2.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
hadc2.Init.LowPowerAutoWait = DISABLE;
hadc2.Init.ContinuousConvMode = DISABLE;
hadc2.Init.NbrOfConversion = 1;
hadc2.Init.DiscontinuousConvMode = DISABLE;
hadc2.Init.DMAContinuousRequests = DISABLE;
hadc2.Init.Overrun = ADC_OVR_DATA_PRESERVED;
hadc2.Init.OversamplingMode = DISABLE;
if (HAL_ADC_Init(&hadc2) != HAL_OK)
{
Error_Handler();
}
/** Configure Injected Channel
*/
sConfigInjected.InjectedChannel = ADC_CHANNEL_9;
sConfigInjected.InjectedRank = ADC_INJECTED_RANK_1;
sConfigInjected.InjectedSamplingTime = ADC_SAMPLETIME_2CYCLES_5;
sConfigInjected.InjectedSingleDiff = ADC_SINGLE_ENDED;
sConfigInjected.InjectedOffsetNumber = ADC_OFFSET_NONE;
sConfigInjected.InjectedOffset = 0;
sConfigInjected.InjectedNbrOfConversion = 1;
sConfigInjected.InjectedDiscontinuousConvMode = DISABLE;
sConfigInjected.AutoInjectedConv = DISABLE;
sConfigInjected.QueueInjectedContext = DISABLE;
sConfigInjected.InjecOversamplingMode = DISABLE;
if (HAL_ADCEx_InjectedConfigChannel(&hadc2, &sConfigInjected) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN ADC2_Init 2 */
/* USER CODE END ADC2_Init 2 */
}