From 86608c6770cf08c138a2bdab5855072f64be09ef Mon Sep 17 00:00:00 2001
From: joshua <joshua@joshuayun.com>
Date: Sat, 30 Dec 2023 23:54:31 -0500
Subject: initial commit

---
 .../Src/stm32h7xx_hal_sai_ex.c                     | 134 +++++++++++++++++++++
 1 file changed, 134 insertions(+)
 create mode 100644 Drivers/STM32H7xx_HAL_Driver/Src/stm32h7xx_hal_sai_ex.c

(limited to 'Drivers/STM32H7xx_HAL_Driver/Src/stm32h7xx_hal_sai_ex.c')

diff --git a/Drivers/STM32H7xx_HAL_Driver/Src/stm32h7xx_hal_sai_ex.c b/Drivers/STM32H7xx_HAL_Driver/Src/stm32h7xx_hal_sai_ex.c
new file mode 100644
index 0000000..9753f76
--- /dev/null
+++ b/Drivers/STM32H7xx_HAL_Driver/Src/stm32h7xx_hal_sai_ex.c
@@ -0,0 +1,134 @@
+/**
+  ******************************************************************************
+  * @file    stm32h7xx_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) 2017 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 "stm32h7xx_hal.h"
+
+/** @addtogroup STM32H7xx_HAL_Driver
+  * @{
+  */
+#ifdef HAL_SAI_MODULE_ENABLED
+
+/** @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(const SAI_HandleTypeDef *hsai,
+                                              const 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 */
+/**
+  * @}
+  */
+
-- 
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