Interrupts occur twice when using ADC injected channel conversion mode.

[Kenji1]

Hi team.

I'm using ADC injected channel conversion with PWM for BLDC motor control.
I would like to change from the HAL library to the LL library to speed up the code, but if I don't use the HAL library, interrupts will occur twice.

The 3 channels of ADC1 are AD converted by the TIM1 Output Compare (OC4REF) trigger event.
The settings for TIM1 and ADC1 are as shown in the code below.

The code below will cause one interrupt and it's OK.

void ADC1_2_IRQHandler(void)
{
  HAL_ADC_IRQHandler(&hadc1);
}

void HAL_ADCEx_InjectedConvCpltCallback(ADC_HandleTypeDef *hadc)
{
   __NOP();
}

The code below will cause twice interrupt.

void DMA1_Channel2_IRQHandler(void)
{
  if (LL_ADC_IsActiveFlag_JEOC(ADC1) && LL_ADC_IsEnabledIT_JEOC(ADC1))
  {
    LL_ADC_ClearFlag_JEOC(ADC1);
    __NOP();
  }
}

It seems that if not use the HAL_ADC_IRQHandler() function, two interrupts will occur
How can I generate an interrupt when AD conversion for 3 channels is completed when using LL-library?

TIM1 (PWM) Setting:

/**
 *　Post only the necessary parts.
 */
void MX_TIM1_Init(void)
{
  LL_TIM_InitTypeDef TIM_InitStruct = {0};
  LL_TIM_OC_InitTypeDef TIM_OC_InitStruct = {0};
  LL_TIM_BDTR_InitTypeDef TIM_BDTRInitStruct = {0};

  LL_GPIO_InitTypeDef GPIO_InitStruct = {0};

  /* Peripheral clock enable */
  LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_TIM1);

  LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_GPIOC);
  /**TIM1 GPIO Configuration
  PC3   ------> TIM1_BKIN2
  */
  GPIO_InitStruct.Pin = LL_GPIO_PIN_3;
  GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
  GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_LOW;
  GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_OPENDRAIN;
  GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
  GPIO_InitStruct.Alternate = LL_GPIO_AF_6;
  LL_GPIO_Init(GPIOC, &GPIO_InitStruct);

  /* TIM1 interrupt Init */
  NVIC_SetPriority(TIM1_UP_TIM16_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(),1, 0));
  NVIC_EnableIRQ(TIM1_UP_TIM16_IRQn);

  /* USER CODE BEGIN TIM1_Init 1 */

  /* USER CODE END TIM1_Init 1 */
  TIM_InitStruct.Prescaler = 0;
  TIM_InitStruct.CounterMode = LL_TIM_COUNTERMODE_CENTER_DOWN;
  TIM_InitStruct.Autoreload = 65535;
  TIM_InitStruct.ClockDivision = LL_TIM_CLOCKDIVISION_DIV1;
  TIM_InitStruct.RepetitionCounter = 0;
  LL_TIM_Init(TIM1, &TIM_InitStruct);
  LL_TIM_DisableARRPreload(TIM1);
  LL_TIM_SetClockSource(TIM1, LL_TIM_CLOCKSOURCE_INTERNAL);
  LL_TIM_OC_EnablePreload(TIM1, LL_TIM_CHANNEL_CH1);
  TIM_OC_InitStruct.OCMode = LL_TIM_OCMODE_PWM1;
  TIM_OC_InitStruct.OCState = LL_TIM_OCSTATE_DISABLE;
  TIM_OC_InitStruct.OCNState = LL_TIM_OCSTATE_DISABLE;
  TIM_OC_InitStruct.CompareValue = 0;
  TIM_OC_InitStruct.OCPolarity = LL_TIM_OCPOLARITY_HIGH;
  TIM_OC_InitStruct.OCNPolarity = LL_TIM_OCPOLARITY_HIGH;
  TIM_OC_InitStruct.OCIdleState = LL_TIM_OCIDLESTATE_LOW;
  TIM_OC_InitStruct.OCNIdleState = LL_TIM_OCIDLESTATE_LOW;
  LL_TIM_OC_Init(TIM1, LL_TIM_CHANNEL_CH1, &TIM_OC_InitStruct);
  LL_TIM_OC_DisableFast(TIM1, LL_TIM_CHANNEL_CH1);
  LL_TIM_OC_EnablePreload(TIM1, LL_TIM_CHANNEL_CH2);
  LL_TIM_OC_Init(TIM1, LL_TIM_CHANNEL_CH2, &TIM_OC_InitStruct);
  LL_TIM_OC_DisableFast(TIM1, LL_TIM_CHANNEL_CH2);
  LL_TIM_OC_EnablePreload(TIM1, LL_TIM_CHANNEL_CH3);
  LL_TIM_OC_Init(TIM1, LL_TIM_CHANNEL_CH3, &TIM_OC_InitStruct);
  LL_TIM_OC_DisableFast(TIM1, LL_TIM_CHANNEL_CH3);
  LL_TIM_OC_EnablePreload(TIM1, LL_TIM_CHANNEL_CH4);
  LL_TIM_OC_Init(TIM1, LL_TIM_CHANNEL_CH4, &TIM_OC_InitStruct);
  LL_TIM_OC_DisableFast(TIM1, LL_TIM_CHANNEL_CH4);
  LL_TIM_SetTriggerOutput(TIM1, LL_TIM_TRGO_OC4REF);
  LL_TIM_SetTriggerOutput2(TIM1, LL_TIM_TRGO2_RESET);
  LL_TIM_DisableMasterSlaveMode(TIM1);
}

ADC setting:

/* ADC1 init function */
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};
  ADC_InjectionConfTypeDef sConfigInjected = {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_ENABLE;
  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_MODE_INDEPENDENT;
  if (HAL_ADCEx_MultiModeConfigChannel(&hadc1, &multimode) != HAL_OK)
  {
    Error_Handler();
  }

  /** Configure Regular Channel
  */
  sConfig.Channel = ADC_CHANNEL_4;
  sConfig.Rank = ADC_REGULAR_RANK_1;
  sConfig.SamplingTime = ADC_SAMPLETIME_47CYCLES_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 Injected Channel
  */
  sConfigInjected.InjectedChannel = ADC_CHANNEL_1;
  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 = 3;
  sConfigInjected.InjectedDiscontinuousConvMode = DISABLE;
  sConfigInjected.AutoInjectedConv = DISABLE;
  sConfigInjected.QueueInjectedContext = DISABLE;
  sConfigInjected.ExternalTrigInjecConv = ADC_EXTERNALTRIGINJEC_T1_TRGO;
  sConfigInjected.ExternalTrigInjecConvEdge = ADC_EXTERNALTRIGINJECCONV_EDGE_RISING;
  sConfigInjected.InjecOversamplingMode = DISABLE;
  if (HAL_ADCEx_InjectedConfigChannel(&hadc1, &sConfigInjected) != HAL_OK)
  {
    Error_Handler();
  }

  /** Configure Injected Channel
  */
  sConfigInjected.InjectedChannel = ADC_CHANNEL_2;
  sConfigInjected.InjectedRank = ADC_INJECTED_RANK_2;
  if (HAL_ADCEx_InjectedConfigChannel(&hadc1, &sConfigInjected) != HAL_OK)
  {
    Error_Handler();
  }

  /** Configure Injected Channel
  */
  sConfigInjected.InjectedChannel = ADC_CHANNEL_3;
  sConfigInjected.InjectedRank = ADC_INJECTED_RANK_3;
  if (HAL_ADCEx_InjectedConfigChannel(&hadc1, &sConfigInjected) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN ADC1_Init 2 */

  /* USER CODE END ADC1_Init 2 */

}