| /** |
| ****************************************************************************** |
| * @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****/ |