135 lines
4.0 KiB
C
135 lines
4.0 KiB
C
/**
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******************************************************************************
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* @file stm32h7xx_hal_sai_ex.c
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* @author MCD Application Team
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* @brief SAI Extended HAL module driver.
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* This file provides firmware functions to manage the following
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* functionality of the SAI Peripheral Controller:
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* + Modify PDM microphone delays.
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*
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2017 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "stm32h7xx_hal.h"
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/** @addtogroup STM32H7xx_HAL_Driver
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* @{
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*/
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#ifdef HAL_SAI_MODULE_ENABLED
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/** @defgroup SAIEx SAIEx
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* @brief SAI Extended HAL module driver
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* @{
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*/
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/* Private types -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private constants ---------------------------------------------------------*/
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#define SAI_PDM_DELAY_MASK 0x77U
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#define SAI_PDM_DELAY_OFFSET 8U
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#define SAI_PDM_RIGHT_DELAY_OFFSET 4U
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/* Private macros ------------------------------------------------------------*/
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/* Private functions ---------------------------------------------------------*/
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/* Exported functions --------------------------------------------------------*/
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/** @defgroup SAIEx_Exported_Functions SAIEx Extended Exported Functions
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* @{
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*/
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/** @defgroup SAIEx_Exported_Functions_Group1 Peripheral Control functions
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* @brief SAIEx control functions
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*
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@verbatim
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===============================================================================
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##### Extended features functions #####
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===============================================================================
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[..] This section provides functions allowing to:
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(+) Modify PDM microphone delays
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@endverbatim
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* @{
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*/
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/**
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* @brief Configure PDM microphone delays.
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* @param hsai SAI handle.
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* @param pdmMicDelay Microphone delays configuration.
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* @retval HAL status
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*/
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HAL_StatusTypeDef HAL_SAIEx_ConfigPdmMicDelay(const SAI_HandleTypeDef *hsai,
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const SAIEx_PdmMicDelayParamTypeDef *pdmMicDelay)
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{
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HAL_StatusTypeDef status = HAL_OK;
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uint32_t offset;
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SAI_TypeDef *SaiBaseAddress;
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/* Get the SAI base address according to the SAI handle */
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#if defined(SAI4)
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SaiBaseAddress = ((hsai->Instance == SAI1_Block_A) ? SAI1 : \
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(hsai->Instance == SAI4_Block_A) ? SAI4 : \
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NULL);
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#else
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SaiBaseAddress = ((hsai->Instance == SAI1_Block_A) ? SAI1 : NULL);
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#endif /* SAI4 */
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/* Check that SAI sub-block is SAI sub-block A */
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if (SaiBaseAddress == NULL)
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{
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status = HAL_ERROR;
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}
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else
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{
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/* Check microphone delay parameters */
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assert_param(IS_SAI_PDM_MIC_PAIRS_NUMBER(pdmMicDelay->MicPair));
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assert_param(IS_SAI_PDM_MIC_DELAY(pdmMicDelay->LeftDelay));
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assert_param(IS_SAI_PDM_MIC_DELAY(pdmMicDelay->RightDelay));
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/* Compute offset on PDMDLY register according mic pair number */
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offset = SAI_PDM_DELAY_OFFSET * (pdmMicDelay->MicPair - 1U);
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/* Check SAI state and offset */
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if ((hsai->State != HAL_SAI_STATE_RESET) && (offset <= 24U))
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{
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/* Reset current delays for specified microphone */
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SaiBaseAddress->PDMDLY &= ~(SAI_PDM_DELAY_MASK << offset);
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/* Apply new microphone delays */
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SaiBaseAddress->PDMDLY |= (((pdmMicDelay->RightDelay << SAI_PDM_RIGHT_DELAY_OFFSET) | pdmMicDelay->LeftDelay) << offset);
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}
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else
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{
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status = HAL_ERROR;
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}
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}
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return status;
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}
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/**
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* @}
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*/
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/**
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* @}
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*/
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/**
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* @}
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*/
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#endif /* HAL_SAI_MODULE_ENABLED */
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/**
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* @}
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*/
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