stm32h7xx_hal_sai_ex.c

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/* Includes ------------------------------------------------------------------*/
#include "stm32h7xx_hal.h"
 
#ifdef HAL_SAI_MODULE_ENABLED
 
/* Private types -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private constants ---------------------------------------------------------*/
#define SAI_PDM_DELAY_MASK          0x77U
#define SAI_PDM_DELAY_OFFSET        8U
#define SAI_PDM_RIGHT_DELAY_OFFSET  4U
 
/* Private macros ------------------------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/* Exported functions --------------------------------------------------------*/
HAL_StatusTypeDef HAL_SAIEx_ConfigPdmMicDelay(SAI_HandleTypeDef *hsai, SAIEx_PdmMicDelayParamTypeDef *pdmMicDelay)
{
  HAL_StatusTypeDef status = HAL_OK;
  uint32_t offset;
  SAI_TypeDef *SaiBaseAddress;
 
  /* Get the SAI base address according to the SAI handle */
#if defined(SAI4)
  SaiBaseAddress = ((hsai->Instance == SAI1_Block_A) ? SAI1 : \
                    (hsai->Instance == SAI4_Block_A) ? SAI4 : \
                     NULL);
#else
  SaiBaseAddress = ((hsai->Instance == SAI1_Block_A) ? SAI1 : NULL);
#endif /* SAI4 */
 
  /* Check that SAI sub-block is SAI sub-block A */
  if (SaiBaseAddress == NULL)
  {
    status = HAL_ERROR;
  }
  else
  {
    /* Check microphone delay parameters */
    assert_param(IS_SAI_PDM_MIC_PAIRS_NUMBER(pdmMicDelay->MicPair));
    assert_param(IS_SAI_PDM_MIC_DELAY(pdmMicDelay->LeftDelay));
    assert_param(IS_SAI_PDM_MIC_DELAY(pdmMicDelay->RightDelay));
 
    /* Compute offset on PDMDLY register according mic pair number */
    offset = SAI_PDM_DELAY_OFFSET * (pdmMicDelay->MicPair - 1U);
 
    /* Check SAI state and offset */
    if ((hsai->State != HAL_SAI_STATE_RESET) && (offset <= 24U))
    {
      /* Reset current delays for specified microphone */
      SaiBaseAddress->PDMDLY &= ~(SAI_PDM_DELAY_MASK << offset);
 
      /* Apply new microphone delays */
      SaiBaseAddress->PDMDLY |= (((pdmMicDelay->RightDelay << SAI_PDM_RIGHT_DELAY_OFFSET) | pdmMicDelay->LeftDelay) << offset);
    }
    else
    {
      status = HAL_ERROR;
    }
  }
  return status;
}
 
#endif /* HAL_SAI_MODULE_ENABLED */
 
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/