diff options
Diffstat (limited to 'bsps/arm/stm32h7/hal/stm32h7xx_hal_sai_ex.c')
| -rw-r--r-- | bsps/arm/stm32h7/hal/stm32h7xx_hal_sai_ex.c | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/bsps/arm/stm32h7/hal/stm32h7xx_hal_sai_ex.c b/bsps/arm/stm32h7/hal/stm32h7xx_hal_sai_ex.c new file mode 100644 index 0000000000..fd392896b1 --- /dev/null +++ b/bsps/arm/stm32h7/hal/stm32h7xx_hal_sai_ex.c @@ -0,0 +1,135 @@ +/**
+ ******************************************************************************
+ * @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
+ *
+ * <h2><center>© Copyright (c) 2017 STMicroelectronics.
+ * All rights reserved.</center></h2>
+ *
+ * This software component is licensed by ST under BSD 3-Clause license,
+ * the "License"; You may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at:
+ * opensource.org/licenses/BSD-3-Clause
+ *
+ ******************************************************************************
+ */
+
+/* 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(SAI_HandleTypeDef *hsai, 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 */
+/**
+ * @}
+ */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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