| /** |
| ****************************************************************************** |
| * @file stm32l5xx_hal_sai_ex.c |
| * @author MCD Application Team |
| * @brief SAI Extended HAL module driver. |
| * This file provides firmware functions to manage the following |
| * functionality of the SAI Peripheral Controller: |
| * + Modify PDM microphone delays. |
| * |
| ****************************************************************************** |
| * @attention |
| * |
| * Copyright (c) 2019 STMicroelectronics. |
| * All rights reserved. |
| * |
| * This software is licensed under terms that can be found in the LICENSE file |
| * in the root directory of this software component. |
| * If no LICENSE file comes with this software, it is provided AS-IS. |
| * |
| ****************************************************************************** |
| */ |
| |
| /* Includes ------------------------------------------------------------------*/ |
| #include "stm32l5xx_hal.h" |
| |
| /** @addtogroup STM32L5xx_HAL_Driver |
| * @{ |
| */ |
| #ifdef HAL_SAI_MODULE_ENABLED |
| |
| /** @defgroup SAIEx SAIEx |
| * @brief SAI Extended HAL module driver |
| * @{ |
| */ |
| |
| /* Private types -------------------------------------------------------------*/ |
| /* Private variables ---------------------------------------------------------*/ |
| /* Private constants ---------------------------------------------------------*/ |
| /** @defgroup SAIEx_Private_Defines SAIEx Extended Private Defines |
| * @{ |
| */ |
| #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 --------------------------------------------------------*/ |
| /** @defgroup SAIEx_Exported_Functions SAIEx Extended Exported Functions |
| * @{ |
| */ |
| |
| /** @defgroup SAIEx_Exported_Functions_Group1 Peripheral Control functions |
| * @brief SAIEx control functions |
| * |
| @verbatim |
| =============================================================================== |
| ##### Extended features functions ##### |
| =============================================================================== |
| [..] This section provides functions allowing to: |
| (+) Modify PDM microphone delays |
| |
| @endverbatim |
| * @{ |
| */ |
| |
| /** |
| * @brief Configure PDM microphone delays. |
| * @param hsai SAI handle. |
| * @param pdmMicDelay Microphone delays configuration. |
| * @retval HAL status |
| */ |
| HAL_StatusTypeDef HAL_SAIEx_ConfigPdmMicDelay(SAI_HandleTypeDef *hsai, SAIEx_PdmMicDelayParamTypeDef *pdmMicDelay) |
| { |
| HAL_StatusTypeDef status = HAL_OK; |
| uint32_t offset; |
| |
| /* Check that SAI sub-block is SAI1 sub-block A */ |
| if (hsai->Instance != SAI1_Block_A) |
| { |
| 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 */ |
| SAI1->PDMDLY &= ~(SAI_PDM_DELAY_MASK << offset); |
| |
| /* Apply new microphone delays */ |
| SAI1->PDMDLY |= (((pdmMicDelay->RightDelay << SAI_PDM_RIGHT_DELAY_OFFSET) | pdmMicDelay->LeftDelay) << offset); |
| } |
| else |
| { |
| status = HAL_ERROR; |
| } |
| } |
| return status; |
| } |
| |
| /** |
| * @} |
| */ |
| |
| /** |
| * @} |
| */ |
| |
| /** |
| * @} |
| */ |
| |
| #endif /* HAL_SAI_MODULE_ENABLED */ |
| /** |
| * @} |
| */ |