LL ADC3 init missing code for STM32L4A

[Marco.D]

Hello,

CubeIDE is not generating the full code for ADC3, as it does for ADC1, more specifically it is missing the part that takes it out of deep power down and activates the voltage regulator.

With the ioc in attach, you will see that for ADC1 it generates

static void MX_ADC1_Init(void)
{
 
  /* USER CODE BEGIN ADC1_Init 0 */
 
  /* USER CODE END ADC1_Init 0 */
 
  LL_ADC_InitTypeDef ADC_InitStruct = {0};
  LL_ADC_REG_InitTypeDef ADC_REG_InitStruct = {0};
  LL_ADC_CommonInitTypeDef ADC_CommonInitStruct = {0};
 
  LL_GPIO_InitTypeDef GPIO_InitStruct = {0};
 
  /* Peripheral clock enable */
  LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_ADC);
 
  LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_GPIOC);
  /**ADC1 GPIO Configuration
  PC0   ------> ADC1_IN1
  */
  GPIO_InitStruct.Pin = LL_GPIO_PIN_0;
  GPIO_InitStruct.Mode = LL_GPIO_MODE_ANALOG;
  GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
  LL_GPIO_Init(GPIOC, &GPIO_InitStruct);
 
  /* USER CODE BEGIN ADC1_Init 1 */
 
  /* USER CODE END ADC1_Init 1 */
  /** Common config
  */
  ADC_InitStruct.Resolution = LL_ADC_RESOLUTION_12B;
  ADC_InitStruct.DataAlignment = LL_ADC_DATA_ALIGN_RIGHT;
  ADC_InitStruct.LowPowerMode = LL_ADC_LP_MODE_NONE;
  LL_ADC_Init(ADC1, &ADC_InitStruct);
  ADC_REG_InitStruct.TriggerSource = LL_ADC_REG_TRIG_SOFTWARE;
  ADC_REG_InitStruct.SequencerLength = LL_ADC_REG_SEQ_SCAN_DISABLE;
  ADC_REG_InitStruct.SequencerDiscont = LL_ADC_REG_SEQ_DISCONT_DISABLE;
  ADC_REG_InitStruct.ContinuousMode = LL_ADC_REG_CONV_SINGLE;
  ADC_REG_InitStruct.DMATransfer = LL_ADC_REG_DMA_TRANSFER_NONE;
  ADC_REG_InitStruct.Overrun = LL_ADC_REG_OVR_DATA_PRESERVED;
  LL_ADC_REG_Init(ADC1, &ADC_REG_InitStruct);
  ADC_CommonInitStruct.CommonClock = LL_ADC_CLOCK_ASYNC_DIV1;
  ADC_CommonInitStruct.Multimode = LL_ADC_MULTI_INDEPENDENT;
  LL_ADC_CommonInit(__LL_ADC_COMMON_INSTANCE(ADC1), &ADC_CommonInitStruct);
 
  /* Disable ADC deep power down (enabled by default after reset state) */
  LL_ADC_DisableDeepPowerDown(ADC1);
  /* Enable ADC internal voltage regulator */
  LL_ADC_EnableInternalRegulator(ADC1);
  /* Delay for ADC internal voltage regulator stabilization. */
  /* Compute number of CPU cycles to wait for, from delay in us. */
  /* Note: Variable divided by 2 to compensate partially */
  /* CPU processing cycles (depends on compilation optimization). */
  /* Note: If system core clock frequency is below 200kHz, wait time */
  /* is only a few CPU processing cycles. */
  uint32_t wait_loop_index;
  wait_loop_index = ((LL_ADC_DELAY_INTERNAL_REGUL_STAB_US * (SystemCoreClock / (100000 * 2))) / 10);
  while(wait_loop_index != 0)
  {
    wait_loop_index--;
  }
  /** Configure Regular Channel
  */
  LL_ADC_REG_SetSequencerRanks(ADC1, LL_ADC_REG_RANK_1, LL_ADC_CHANNEL_1);
  LL_ADC_SetChannelSamplingTime(ADC1, LL_ADC_CHANNEL_1, LL_ADC_SAMPLINGTIME_2CYCLES_5);
  LL_ADC_SetChannelSingleDiff(ADC1, LL_ADC_CHANNEL_1, LL_ADC_SINGLE_ENDED);
  /* USER CODE BEGIN ADC1_Init 2 */
 
  /* USER CODE END ADC1_Init 2 */
 
}

while for ADC3 it generates this (missing lines 46 to 61 from above):

static void MX_ADC3_Init(void)
{
 
  /* USER CODE BEGIN ADC3_Init 0 */
 
  /* USER CODE END ADC3_Init 0 */
 
  LL_ADC_InitTypeDef ADC_InitStruct = {0};
  LL_ADC_REG_InitTypeDef ADC_REG_InitStruct = {0};
 
  LL_GPIO_InitTypeDef GPIO_InitStruct = {0};
 
  /* Peripheral clock enable */
  LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_ADC);
 
  LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_GPIOC);
  /**ADC3 GPIO Configuration
  PC1   ------> ADC3_IN2
  */
  GPIO_InitStruct.Pin = LL_GPIO_PIN_1;
  GPIO_InitStruct.Mode = LL_GPIO_MODE_ANALOG;
  GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
  LL_GPIO_Init(GPIOC, &GPIO_InitStruct);
 
  /* USER CODE BEGIN ADC3_Init 1 */
 
  /* USER CODE END ADC3_Init 1 */
  /** Common config
  */
  ADC_InitStruct.Resolution = LL_ADC_RESOLUTION_12B;
  ADC_InitStruct.DataAlignment = LL_ADC_DATA_ALIGN_RIGHT;
  ADC_InitStruct.LowPowerMode = LL_ADC_LP_MODE_NONE;
  LL_ADC_Init(ADC3, &ADC_InitStruct);
  ADC_REG_InitStruct.TriggerSource = LL_ADC_REG_TRIG_SOFTWARE;
  ADC_REG_InitStruct.SequencerLength = LL_ADC_REG_SEQ_SCAN_DISABLE;
  ADC_REG_InitStruct.SequencerDiscont = LL_ADC_REG_SEQ_DISCONT_DISABLE;
  ADC_REG_InitStruct.ContinuousMode = LL_ADC_REG_CONV_SINGLE;
  ADC_REG_InitStruct.DMATransfer = LL_ADC_REG_DMA_TRANSFER_NONE;
  ADC_REG_InitStruct.Overrun = LL_ADC_REG_OVR_DATA_PRESERVED;
  LL_ADC_REG_Init(ADC3, &ADC_REG_InitStruct);
  /** Configure Regular Channel
  */
  LL_ADC_REG_SetSequencerRanks(ADC3, LL_ADC_REG_RANK_1, LL_ADC_CHANNEL_2);
  LL_ADC_SetChannelSamplingTime(ADC3, LL_ADC_CHANNEL_2, LL_ADC_SAMPLINGTIME_2CYCLES_5);
  LL_ADC_SetChannelSingleDiff(ADC3, LL_ADC_CHANNEL_2, LL_ADC_SINGLE_ENDED);
  /* USER CODE BEGIN ADC3_Init 2 */
 
  /* USER CODE END ADC3_Init 2 */
 
}

I believe I am using the latest FW: L4 V1.17.0, and CubeIDE 1.6.1

Regards,

Marco

[Houda GHABRI]

Hi @Community member​ ,

Thank you for this valuable comment.

The problem is confirmed and I will raise it internally to be corrected shortly.

Hope this helps you.

Houda