STM32CubeMX generated code STM32N657X0 initialization missing for IC7

[Tuomas95]

When generating code with CubeMX (Version 6.14.1) for the STM32N657X0 with the following clock configuration for SAI1:

With the above MX configuration and below code, the SAI1 FS is around 2 KHz:

After adding the lines:

PeriphClkInitStruct.ICSelection[RCC_IC7].ClockSelection = RCC_ICCLKSOURCE_PLL3;
PeriphClkInitStruct.ICSelection[RCC_IC7].ClockDivider = 1;

to HAL_SAI_MspInit() in stm32n6xx_hal_msp.c the signals are correctly generated:

/* FILE: stm32n6xx_hal_msp.c */
void HAL_SAI_MspInit(SAI_HandleTypeDef* hsai)
{

  GPIO_InitTypeDef GPIO_InitStruct;
  DMA_NodeConfTypeDef NodeConfig;
  RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};
/* SAI1 */
    if(hsai->Instance==SAI1_Block_A)
    {
    /* Peripheral clock enable */

  /** Initializes the peripherals clock
  */
    PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_SAI1;
    PeriphClkInitStruct.Sai1ClockSelection = RCC_SAI1CLKSOURCE_IC7;
    /* BELOW MISSING FROM GENERATED CODE */
    PeriphClkInitStruct.ICSelection[RCC_IC7].ClockSelection = RCC_ICCLKSOURCE_PLL3; // MANUALLY ADDED
    PeriphClkInitStruct.ICSelection[RCC_IC7].ClockDivider = 1; // MANUALLY ADDED
    /* ABOVE MISSING FROM GENERATED CODE */
    if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
    {
      Error_Handler();
    }

    if (SAI1_client == 0)
    {
       __HAL_RCC_SAI1_CLK_ENABLE();

    /* Peripheral interrupt init*/
    HAL_NVIC_SetPriority(SAI1_A_IRQn, 0, 0);
    HAL_NVIC_EnableIRQ(SAI1_A_IRQn);
    }
    SAI1_client ++;
    /*...*/
}
/* FILE: main.c */

/**
  * @brief SAI1 Initialization Function
  * @PAram None
  * @retval None
  */
static void SAI1_Init_TDM(void)
{

  /* USER CODE BEGIN SAI1_Init 0 */

  /* USER CODE END SAI1_Init 0 */

  /* USER CODE BEGIN SAI1_Init 1 */

  /* USER CODE END SAI1_Init 1 */
  hsai_BlockA1.Instance = SAI1_Block_A;
  hsai_BlockA1.Init.Protocol = SAI_FREE_PROTOCOL;
  hsai_BlockA1.Init.AudioMode = SAI_MODEMASTER_TX;
  hsai_BlockA1.Init.DataSize = SAI_DATASIZE_16;
  hsai_BlockA1.Init.FirstBit = SAI_FIRSTBIT_MSB;
  hsai_BlockA1.Init.ClockStrobing = SAI_CLOCKSTROBING_FALLINGEDGE;
  hsai_BlockA1.Init.Synchro = SAI_ASYNCHRONOUS;
  hsai_BlockA1.Init.OutputDrive = SAI_OUTPUTDRIVE_ENABLE;
  hsai_BlockA1.Init.NoDivider = SAI_MASTERDIVIDER_ENABLE;
  hsai_BlockA1.Init.FIFOThreshold = SAI_FIFOTHRESHOLD_1QF;
  hsai_BlockA1.Init.AudioFrequency = SAI_AUDIO_FREQUENCY_16K;
  hsai_BlockA1.Init.SynchroExt = SAI_SYNCEXT_DISABLE;
  hsai_BlockA1.Init.MckOutput = SAI_MCK_OUTPUT_ENABLE;
  hsai_BlockA1.Init.MonoStereoMode = SAI_MONOMODE;
  hsai_BlockA1.Init.CompandingMode = SAI_NOCOMPANDING;
  hsai_BlockA1.Init.TriState = SAI_OUTPUT_NOTRELEASED;
  hsai_BlockA1.Init.PdmInit.Activation = DISABLE;
  hsai_BlockA1.FrameInit.FrameLength = 128;
  hsai_BlockA1.FrameInit.ActiveFrameLength = 16;
  hsai_BlockA1.FrameInit.FSDefinition = SAI_FS_CHANNEL_IDENTIFICATION;
  hsai_BlockA1.FrameInit.FSPolarity = SAI_FS_ACTIVE_LOW;
  hsai_BlockA1.FrameInit.FSOffset = SAI_FS_BEFOREFIRSTBIT;
  hsai_BlockA1.SlotInit.FirstBitOffset = 0;
  hsai_BlockA1.SlotInit.SlotSize = SAI_SLOTSIZE_16B;
  hsai_BlockA1.SlotInit.SlotNumber = 8;
  hsai_BlockA1.SlotInit.SlotActive = SAI_SLOTACTIVE_0 | SAI_SLOTACTIVE_1 | SAI_SLOTACTIVE_2 | SAI_SLOTACTIVE_3 | SAI_SLOTACTIVE_4 | SAI_SLOTACTIVE_5 | SAI_SLOTACTIVE_6 | SAI_SLOTACTIVE_7;
  if (HAL_SAI_Init(&hsai_BlockA1) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN SAI1_Init 2 */

  /* USER CODE END SAI1_Init 2 */

}

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[Mahmoud Ben Romdhane]

Hello @Tuomas95 ,

First let me thank you for posting and welcome to the ST Community.

Your request is under investigation, and I will get back to you ASAP.

Thanks.

Mahmoud

[Mahmoud Ben Romdhane · Accepted solution]

Hello @Tuomas95 ,

Thank you for your contribution and bringing this issue to our attention.

This issue is reported and raised to the Development Team under an internal ticket number: 211832.

Thanks.

Mahmoud