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- /**
- ******************************************************************************
- * @file stm32l4xx_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
- *
- * <h2><center>© COPYRIGHT(c) 2017 STMicroelectronics</center></h2>
- *
- * Redistribution and use in source and binary forms, with or without modification,
- * are permitted provided that the following conditions are met:
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- * 3. Neither the name of STMicroelectronics nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- ******************************************************************************
- */
- /* Includes ------------------------------------------------------------------*/
- #include "stm32l4xx_hal.h"
- /** @addtogroup STM32L4xx_HAL_Driver
- * @{
- */
- #ifdef HAL_SAI_MODULE_ENABLED
- #if defined(STM32L4R5xx) || defined(STM32L4R7xx) || defined(STM32L4R9xx) || defined(STM32L4S5xx) || defined(STM32L4S7xx) || defined(STM32L4S9xx)
- /** @defgroup SAIEx SAIEx
- * @brief SAI Extended HAL module driver
- * @{
- */
- /* 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 --------------------------------------------------------*/
- /** @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;
-
- /* 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));
-
- /* Check SAI state */
- if(hsai->State != HAL_SAI_STATE_RESET)
- {
- /* Reset current delays for specified microphone */
- SAI1->PDMDLY &= ~(SAI_PDM_DELAY_MASK << (SAI_PDM_DELAY_OFFSET * (pdmMicDelay->MicPair - 1)));
-
- /* Apply new microphone delays */
- SAI1->PDMDLY |= (((pdmMicDelay->RightDelay << SAI_PDM_RIGHT_DELAY_OFFSET) | pdmMicDelay->LeftDelay) << \
- (SAI_PDM_DELAY_OFFSET * (pdmMicDelay->MicPair - 1)));
- }
- else
- {
- status = HAL_ERROR;
- }
- }
- return status;
- }
- /**
- * @}
- */
- /**
- * @}
- */
- /**
- * @}
- */
- #endif /* STM32L4R5xx || STM32L4R7xx || STM32L4R9xx || STM32L4S5xx || STM32L4S7xx || STM32L4S9xx */
- #endif /* HAL_SAI_MODULE_ENABLED */
- /**
- * @}
- */
- /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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