diff options
Diffstat (limited to 'bsps/arm/stm32h7/hal/stm32h7xx_hal_sai.c')
| -rw-r--r-- | bsps/arm/stm32h7/hal/stm32h7xx_hal_sai.c | 68 |
1 files changed, 47 insertions, 21 deletions
diff --git a/bsps/arm/stm32h7/hal/stm32h7xx_hal_sai.c b/bsps/arm/stm32h7/hal/stm32h7xx_hal_sai.c index 0554e6b201..52fd535054 100644 --- a/bsps/arm/stm32h7/hal/stm32h7xx_hal_sai.c +++ b/bsps/arm/stm32h7/hal/stm32h7xx_hal_sai.c @@ -10,6 +10,17 @@ * + Peripheral Control functions * + Peripheral State functions * + ****************************************************************************** + * @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. + * + ****************************************************************************** @verbatim ============================================================================== ##### How to use this driver ##### @@ -199,18 +210,6 @@ and weak (surcharged) callbacks are used. @endverbatim - ****************************************************************************** - * @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 ------------------------------------------------------------------*/ @@ -247,9 +246,10 @@ typedef enum * @ingroup RTEMSBSPsARMSTM32H7 * @{ */ -#define SAI_FIFO_SIZE 8U #define SAI_DEFAULT_TIMEOUT 4U #define SAI_LONG_TIMEOUT 1000U +#define SAI_SPDIF_FRAME_LENGTH 64U +#define SAI_AC97_FRAME_LENGTH 256U /** * @} */ @@ -398,7 +398,7 @@ HAL_StatusTypeDef HAL_SAI_Init(SAI_HandleTypeDef *hsai) assert_param(IS_SAI_BLOCK_FIRST_BIT(hsai->Init.FirstBit)); assert_param(IS_SAI_BLOCK_CLOCK_STROBING(hsai->Init.ClockStrobing)); assert_param(IS_SAI_BLOCK_SYNCHRO(hsai->Init.Synchro)); -#if defined(SAI_VER_V2_X) +#if defined(SAI_VER_V2_X) /* SAI Peripheral version depends on STM32H7 device revision ID */ if (HAL_GetREVID() >= REV_ID_B) /* STM32H7xx Rev.B and above */ { @@ -623,8 +623,26 @@ HAL_StatusTypeDef HAL_SAI_Init(SAI_HandleTypeDef *hsai) if (hsai->Init.NoDivider == SAI_MASTERDIVIDER_DISABLE) { /* NODIV = 1 */ + uint32_t tmpframelength; + + if (hsai->Init.Protocol == SAI_SPDIF_PROTOCOL) + { + /* For SPDIF protocol, frame length is set by hardware to 64 */ + tmpframelength = SAI_SPDIF_FRAME_LENGTH; + } + else if (hsai->Init.Protocol == SAI_AC97_PROTOCOL) + { + /* For AC97 protocol, frame length is set by hardware to 256 */ + tmpframelength = SAI_AC97_FRAME_LENGTH; + } + else + { + /* For free protocol, frame length is set by user */ + tmpframelength = hsai->FrameInit.FrameLength; + } + /* (freq x 10) to keep Significant digits */ - tmpval = (freq * 10U) / (hsai->Init.AudioFrequency * hsai->FrameInit.FrameLength); + tmpval = (freq * 10U) / (hsai->Init.AudioFrequency * tmpframelength); } else { @@ -641,8 +659,17 @@ HAL_StatusTypeDef HAL_SAI_Init(SAI_HandleTypeDef *hsai) { hsai->Init.Mckdiv += 1U; } + + /* For SPDIF protocol, SAI shall provide a bit clock twice faster the symbol-rate */ + if (hsai->Init.Protocol == SAI_SPDIF_PROTOCOL) + { + hsai->Init.Mckdiv = hsai->Init.Mckdiv >> 1; + } } + /* Check the SAI Block master clock divider parameter */ + assert_param(IS_SAI_BLOCK_MASTER_DIVIDER(hsai->Init.Mckdiv)); + /* Compute CKSTR bits of SAI CR1 according ClockStrobing and AudioMode */ if ((hsai->Init.AudioMode == SAI_MODEMASTER_TX) || (hsai->Init.AudioMode == SAI_MODESLAVE_TX)) { @@ -1668,7 +1695,7 @@ HAL_StatusTypeDef HAL_SAI_Transmit_DMA(SAI_HandleTypeDef *hsai, uint8_t *pData, /* Enable SAI Tx DMA Request */ hsai->Instance->CR1 |= SAI_xCR1_DMAEN; - /* Wait untill FIFO is not empty */ + /* Wait until FIFO is not empty */ while ((hsai->Instance->SR & SAI_xSR_FLVL) == SAI_FIFOSTATUS_EMPTY) { /* Check for the Timeout */ @@ -1867,7 +1894,7 @@ void HAL_SAI_IRQHandler(SAI_HandleTypeDef *hsai) uint32_t cr1config = hsai->Instance->CR1; uint32_t tmperror; - /* SAI Fifo request interrupt occured ------------------------------------*/ + /* SAI Fifo request interrupt occurred ------------------------------------*/ if (((itflags & SAI_xSR_FREQ) == SAI_xSR_FREQ) && ((itsources & SAI_IT_FREQ) == SAI_IT_FREQ)) { hsai->InterruptServiceRoutine(hsai); @@ -2231,7 +2258,7 @@ __weak void HAL_SAI_ErrorCallback(SAI_HandleTypeDef *hsai) * the configuration information for SAI module. * @retval HAL state */ -HAL_SAI_StateTypeDef HAL_SAI_GetState(SAI_HandleTypeDef *hsai) +HAL_SAI_StateTypeDef HAL_SAI_GetState(const SAI_HandleTypeDef *hsai) { return hsai->State; } @@ -2242,7 +2269,7 @@ HAL_SAI_StateTypeDef HAL_SAI_GetState(SAI_HandleTypeDef *hsai) * the configuration information for the specified SAI Block. * @retval SAI Error Code */ -uint32_t HAL_SAI_GetError(SAI_HandleTypeDef *hsai) +uint32_t HAL_SAI_GetError(const SAI_HandleTypeDef *hsai) { return hsai->ErrorCode; } @@ -2514,7 +2541,7 @@ static uint32_t SAI_InterruptFlag(const SAI_HandleTypeDef *hsai, SAI_ModeTypedef */ static HAL_StatusTypeDef SAI_Disable(SAI_HandleTypeDef *hsai) { - register uint32_t count = SAI_DEFAULT_TIMEOUT * (SystemCoreClock / 7U / 1000U); + uint32_t count = SAI_DEFAULT_TIMEOUT * (SystemCoreClock / 7U / 1000U); HAL_StatusTypeDef status = HAL_OK; /* Disable the SAI instance */ @@ -2925,4 +2952,3 @@ static void SAI_DMAAbort(DMA_HandleTypeDef *hdma) * @} */ -/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |