751 lines
37 KiB
C
751 lines
37 KiB
C
/**
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******************************************************************************
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* @file stm32h7xx_ll_spi.c
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* @author MCD Application Team
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* @brief SPI LL module driver.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2017 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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#if defined(USE_FULL_LL_DRIVER)
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/* Includes ------------------------------------------------------------------*/
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#include "stm32h7xx_ll_spi.h"
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#include "stm32h7xx_ll_bus.h"
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#include "stm32h7xx_ll_rcc.h"
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#ifdef USE_FULL_ASSERT
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#include "stm32_assert.h"
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#else
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#define assert_param(expr) ((void)0U)
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#endif /* USE_FULL_ASSERT */
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/** @addtogroup STM32H7xx_LL_Driver
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* @{
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*/
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#if defined(SPI1) || defined(SPI2) || defined(SPI3) || defined(SPI4) || defined(SPI5) || defined(SPI6)
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/** @addtogroup SPI_LL
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* @{
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*/
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/* Private types -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private constants ---------------------------------------------------------*/
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/* Private macros ------------------------------------------------------------*/
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/** @addtogroup SPI_LL_Private_Macros
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* @{
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*/
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#define IS_LL_SPI_MODE(__VALUE__) (((__VALUE__) == LL_SPI_MODE_MASTER) || \
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((__VALUE__) == LL_SPI_MODE_SLAVE))
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#define IS_LL_SPI_SS_IDLENESS(__VALUE__) (((__VALUE__) == LL_SPI_SS_IDLENESS_00CYCLE) || \
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((__VALUE__) == LL_SPI_SS_IDLENESS_01CYCLE) || \
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((__VALUE__) == LL_SPI_SS_IDLENESS_02CYCLE) || \
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((__VALUE__) == LL_SPI_SS_IDLENESS_03CYCLE) || \
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((__VALUE__) == LL_SPI_SS_IDLENESS_04CYCLE) || \
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((__VALUE__) == LL_SPI_SS_IDLENESS_05CYCLE) || \
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((__VALUE__) == LL_SPI_SS_IDLENESS_06CYCLE) || \
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((__VALUE__) == LL_SPI_SS_IDLENESS_07CYCLE) || \
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((__VALUE__) == LL_SPI_SS_IDLENESS_08CYCLE) || \
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((__VALUE__) == LL_SPI_SS_IDLENESS_09CYCLE) || \
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((__VALUE__) == LL_SPI_SS_IDLENESS_10CYCLE) || \
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((__VALUE__) == LL_SPI_SS_IDLENESS_11CYCLE) || \
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((__VALUE__) == LL_SPI_SS_IDLENESS_12CYCLE) || \
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((__VALUE__) == LL_SPI_SS_IDLENESS_13CYCLE) || \
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((__VALUE__) == LL_SPI_SS_IDLENESS_14CYCLE) || \
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((__VALUE__) == LL_SPI_SS_IDLENESS_15CYCLE))
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#define IS_LL_SPI_ID_IDLENESS(__VALUE__) (((__VALUE__) == LL_SPI_ID_IDLENESS_00CYCLE) || \
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((__VALUE__) == LL_SPI_ID_IDLENESS_01CYCLE) || \
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((__VALUE__) == LL_SPI_ID_IDLENESS_02CYCLE) || \
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((__VALUE__) == LL_SPI_ID_IDLENESS_03CYCLE) || \
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((__VALUE__) == LL_SPI_ID_IDLENESS_04CYCLE) || \
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((__VALUE__) == LL_SPI_ID_IDLENESS_05CYCLE) || \
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((__VALUE__) == LL_SPI_ID_IDLENESS_06CYCLE) || \
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((__VALUE__) == LL_SPI_ID_IDLENESS_07CYCLE) || \
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((__VALUE__) == LL_SPI_ID_IDLENESS_08CYCLE) || \
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((__VALUE__) == LL_SPI_ID_IDLENESS_09CYCLE) || \
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((__VALUE__) == LL_SPI_ID_IDLENESS_10CYCLE) || \
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((__VALUE__) == LL_SPI_ID_IDLENESS_11CYCLE) || \
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((__VALUE__) == LL_SPI_ID_IDLENESS_12CYCLE) || \
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((__VALUE__) == LL_SPI_ID_IDLENESS_13CYCLE) || \
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((__VALUE__) == LL_SPI_ID_IDLENESS_14CYCLE) || \
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((__VALUE__) == LL_SPI_ID_IDLENESS_15CYCLE))
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#define IS_LL_SPI_TXCRCINIT_PATTERN(__VALUE__) (((__VALUE__) == LL_SPI_TXCRCINIT_ALL_ZERO_PATTERN) || \
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((__VALUE__) == LL_SPI_TXCRCINIT_ALL_ONES_PATTERN))
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#define IS_LL_SPI_RXCRCINIT_PATTERN(__VALUE__) (((__VALUE__) == LL_SPI_RXCRCINIT_ALL_ZERO_PATTERN) || \
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((__VALUE__) == LL_SPI_RXCRCINIT_ALL_ONES_PATTERN))
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#define IS_LL_SPI_UDR_CONFIG_REGISTER(__VALUE__) (((__VALUE__) == LL_SPI_UDR_CONFIG_REGISTER_PATTERN) || \
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((__VALUE__) == LL_SPI_UDR_CONFIG_LAST_RECEIVED) || \
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((__VALUE__) == LL_SPI_UDR_CONFIG_LAST_TRANSMITTED))
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#define IS_LL_SPI_UDR_DETECT_BEGIN_DATA(__VALUE__) (((__VALUE__) == LL_SPI_UDR_DETECT_BEGIN_DATA_FRAME) || \
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((__VALUE__) == LL_SPI_UDR_DETECT_END_DATA_FRAME) || \
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((__VALUE__) == LL_SPI_UDR_DETECT_BEGIN_ACTIVE_NSS))
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#define IS_LL_SPI_PROTOCOL(__VALUE__) (((__VALUE__) == LL_SPI_PROTOCOL_MOTOROLA) || \
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((__VALUE__) == LL_SPI_PROTOCOL_TI))
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#define IS_LL_SPI_PHASE(__VALUE__) (((__VALUE__) == LL_SPI_PHASE_1EDGE) || \
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((__VALUE__) == LL_SPI_PHASE_2EDGE))
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#define IS_LL_SPI_POLARITY(__VALUE__) (((__VALUE__) == LL_SPI_POLARITY_LOW) || \
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((__VALUE__) == LL_SPI_POLARITY_HIGH))
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#define IS_LL_SPI_BAUDRATEPRESCALER(__VALUE__) (((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV2) || \
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((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV4) || \
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((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV8) || \
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((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV16) || \
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((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV32) || \
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((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV64) || \
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((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV128) || \
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((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV256))
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#define IS_LL_SPI_BITORDER(__VALUE__) (((__VALUE__) == LL_SPI_LSB_FIRST) || \
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((__VALUE__) == LL_SPI_MSB_FIRST))
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#define IS_LL_SPI_TRANSFER_DIRECTION(__VALUE__) (((__VALUE__) == LL_SPI_FULL_DUPLEX) || \
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((__VALUE__) == LL_SPI_SIMPLEX_TX) || \
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((__VALUE__) == LL_SPI_SIMPLEX_RX) || \
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((__VALUE__) == LL_SPI_HALF_DUPLEX_RX) || \
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((__VALUE__) == LL_SPI_HALF_DUPLEX_TX))
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#define IS_LL_SPI_DATAWIDTH(__VALUE__) (((__VALUE__) == LL_SPI_DATAWIDTH_4BIT) || \
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((__VALUE__) == LL_SPI_DATAWIDTH_5BIT) || \
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((__VALUE__) == LL_SPI_DATAWIDTH_6BIT) || \
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((__VALUE__) == LL_SPI_DATAWIDTH_7BIT) || \
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((__VALUE__) == LL_SPI_DATAWIDTH_8BIT) || \
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((__VALUE__) == LL_SPI_DATAWIDTH_9BIT) || \
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((__VALUE__) == LL_SPI_DATAWIDTH_10BIT) || \
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((__VALUE__) == LL_SPI_DATAWIDTH_11BIT) || \
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((__VALUE__) == LL_SPI_DATAWIDTH_12BIT) || \
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((__VALUE__) == LL_SPI_DATAWIDTH_13BIT) || \
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((__VALUE__) == LL_SPI_DATAWIDTH_14BIT) || \
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((__VALUE__) == LL_SPI_DATAWIDTH_15BIT) || \
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((__VALUE__) == LL_SPI_DATAWIDTH_16BIT) || \
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((__VALUE__) == LL_SPI_DATAWIDTH_17BIT) || \
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((__VALUE__) == LL_SPI_DATAWIDTH_18BIT) || \
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((__VALUE__) == LL_SPI_DATAWIDTH_19BIT) || \
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((__VALUE__) == LL_SPI_DATAWIDTH_20BIT) || \
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((__VALUE__) == LL_SPI_DATAWIDTH_21BIT) || \
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((__VALUE__) == LL_SPI_DATAWIDTH_22BIT) || \
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((__VALUE__) == LL_SPI_DATAWIDTH_23BIT) || \
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((__VALUE__) == LL_SPI_DATAWIDTH_24BIT) || \
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((__VALUE__) == LL_SPI_DATAWIDTH_25BIT) || \
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((__VALUE__) == LL_SPI_DATAWIDTH_26BIT) || \
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((__VALUE__) == LL_SPI_DATAWIDTH_27BIT) || \
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((__VALUE__) == LL_SPI_DATAWIDTH_28BIT) || \
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((__VALUE__) == LL_SPI_DATAWIDTH_29BIT) || \
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((__VALUE__) == LL_SPI_DATAWIDTH_30BIT) || \
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((__VALUE__) == LL_SPI_DATAWIDTH_31BIT) || \
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((__VALUE__) == LL_SPI_DATAWIDTH_32BIT))
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#define IS_LL_SPI_FIFO_TH(__VALUE__) (((__VALUE__) == LL_SPI_FIFO_TH_01DATA) || \
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((__VALUE__) == LL_SPI_FIFO_TH_02DATA) || \
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((__VALUE__) == LL_SPI_FIFO_TH_03DATA) || \
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((__VALUE__) == LL_SPI_FIFO_TH_04DATA) || \
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((__VALUE__) == LL_SPI_FIFO_TH_05DATA) || \
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((__VALUE__) == LL_SPI_FIFO_TH_06DATA) || \
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((__VALUE__) == LL_SPI_FIFO_TH_07DATA) || \
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((__VALUE__) == LL_SPI_FIFO_TH_08DATA) || \
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((__VALUE__) == LL_SPI_FIFO_TH_09DATA) || \
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((__VALUE__) == LL_SPI_FIFO_TH_10DATA) || \
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((__VALUE__) == LL_SPI_FIFO_TH_11DATA) || \
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((__VALUE__) == LL_SPI_FIFO_TH_12DATA) || \
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((__VALUE__) == LL_SPI_FIFO_TH_13DATA) || \
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((__VALUE__) == LL_SPI_FIFO_TH_14DATA) || \
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((__VALUE__) == LL_SPI_FIFO_TH_15DATA) || \
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((__VALUE__) == LL_SPI_FIFO_TH_16DATA))
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#define IS_LL_SPI_CRC(__VALUE__) (((__VALUE__) == LL_SPI_CRC_4BIT) || \
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((__VALUE__) == LL_SPI_CRC_5BIT) || \
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((__VALUE__) == LL_SPI_CRC_6BIT) || \
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((__VALUE__) == LL_SPI_CRC_7BIT) || \
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((__VALUE__) == LL_SPI_CRC_8BIT) || \
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((__VALUE__) == LL_SPI_CRC_9BIT) || \
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((__VALUE__) == LL_SPI_CRC_10BIT) || \
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((__VALUE__) == LL_SPI_CRC_11BIT) || \
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((__VALUE__) == LL_SPI_CRC_12BIT) || \
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((__VALUE__) == LL_SPI_CRC_13BIT) || \
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((__VALUE__) == LL_SPI_CRC_14BIT) || \
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((__VALUE__) == LL_SPI_CRC_15BIT) || \
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((__VALUE__) == LL_SPI_CRC_16BIT) || \
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((__VALUE__) == LL_SPI_CRC_17BIT) || \
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((__VALUE__) == LL_SPI_CRC_18BIT) || \
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((__VALUE__) == LL_SPI_CRC_19BIT) || \
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((__VALUE__) == LL_SPI_CRC_20BIT) || \
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((__VALUE__) == LL_SPI_CRC_21BIT) || \
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((__VALUE__) == LL_SPI_CRC_22BIT) || \
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((__VALUE__) == LL_SPI_CRC_23BIT) || \
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((__VALUE__) == LL_SPI_CRC_24BIT) || \
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((__VALUE__) == LL_SPI_CRC_25BIT) || \
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((__VALUE__) == LL_SPI_CRC_26BIT) || \
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((__VALUE__) == LL_SPI_CRC_27BIT) || \
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((__VALUE__) == LL_SPI_CRC_28BIT) || \
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((__VALUE__) == LL_SPI_CRC_29BIT) || \
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((__VALUE__) == LL_SPI_CRC_30BIT) || \
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((__VALUE__) == LL_SPI_CRC_31BIT) || \
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((__VALUE__) == LL_SPI_CRC_32BIT))
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#define IS_LL_SPI_NSS(__VALUE__) (((__VALUE__) == LL_SPI_NSS_SOFT) || \
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((__VALUE__) == LL_SPI_NSS_HARD_INPUT) || \
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((__VALUE__) == LL_SPI_NSS_HARD_OUTPUT))
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#define IS_LL_SPI_RX_FIFO(__VALUE__) (((__VALUE__) == LL_SPI_RX_FIFO_0PACKET) || \
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((__VALUE__) == LL_SPI_RX_FIFO_1PACKET) || \
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((__VALUE__) == LL_SPI_RX_FIFO_2PACKET) || \
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((__VALUE__) == LL_SPI_RX_FIFO_3PACKET))
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#define IS_LL_SPI_CRCCALCULATION(__VALUE__) (((__VALUE__) == LL_SPI_CRCCALCULATION_ENABLE) || \
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((__VALUE__) == LL_SPI_CRCCALCULATION_DISABLE))
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#define IS_LL_SPI_CRC_POLYNOMIAL(__VALUE__) ((__VALUE__) >= 0x1UL)
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/**
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* @}
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*/
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/* Private function prototypes -----------------------------------------------*/
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/* Exported functions --------------------------------------------------------*/
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/** @addtogroup SPI_LL_Exported_Functions
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* @{
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*/
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/** @addtogroup SPI_LL_EF_Init
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* @{
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*/
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/**
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* @brief De-initialize the SPI registers to their default reset values.
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* @param SPIx SPI Instance
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* @retval An ErrorStatus enumeration value:
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* - SUCCESS: SPI registers are de-initialized
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* - ERROR: SPI registers are not de-initialized
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*/
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ErrorStatus LL_SPI_DeInit(SPI_TypeDef *SPIx)
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{
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ErrorStatus status = ERROR;
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/* Check the parameters */
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assert_param(IS_SPI_ALL_INSTANCE(SPIx));
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#if defined(SPI1)
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if (SPIx == SPI1)
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{
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/* Force reset of SPI clock */
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LL_APB2_GRP1_ForceReset(LL_APB2_GRP1_PERIPH_SPI1);
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/* Release reset of SPI clock */
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LL_APB2_GRP1_ReleaseReset(LL_APB2_GRP1_PERIPH_SPI1);
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/* Update the return status */
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status = SUCCESS;
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}
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#endif /* SPI1 */
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#if defined(SPI2)
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if (SPIx == SPI2)
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{
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/* Force reset of SPI clock */
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LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_SPI2);
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/* Release reset of SPI clock */
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LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_SPI2);
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/* Update the return status */
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status = SUCCESS;
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}
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#endif /* SPI2 */
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#if defined(SPI3)
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if (SPIx == SPI3)
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{
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/* Force reset of SPI clock */
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LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_SPI3);
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/* Release reset of SPI clock */
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LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_SPI3);
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/* Update the return status */
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status = SUCCESS;
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}
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#endif /* SPI3 */
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#if defined(SPI4)
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if (SPIx == SPI4)
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{
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/* Force reset of SPI clock */
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LL_APB2_GRP1_ForceReset(LL_APB2_GRP1_PERIPH_SPI4);
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/* Release reset of SPI clock */
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LL_APB2_GRP1_ReleaseReset(LL_APB2_GRP1_PERIPH_SPI4);
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/* Update the return status */
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status = SUCCESS;
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}
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#endif /* SPI4 */
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#if defined(SPI5)
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if (SPIx == SPI5)
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{
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/* Force reset of SPI clock */
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LL_APB2_GRP1_ForceReset(LL_APB2_GRP1_PERIPH_SPI5);
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/* Release reset of SPI clock */
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LL_APB2_GRP1_ReleaseReset(LL_APB2_GRP1_PERIPH_SPI5);
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/* Update the return status */
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status = SUCCESS;
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}
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#endif /* SPI5 */
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#if defined(SPI6)
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if (SPIx == SPI6)
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{
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/* Force reset of SPI clock */
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LL_APB4_GRP1_ForceReset(LL_APB4_GRP1_PERIPH_SPI6);
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/* Release reset of SPI clock */
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LL_APB4_GRP1_ReleaseReset(LL_APB4_GRP1_PERIPH_SPI6);
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/* Update the return status */
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status = SUCCESS;
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}
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#endif /* SPI6 */
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return status;
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}
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/**
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* @brief Initialize the SPI registers according to the specified parameters in SPI_InitStruct.
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* @note As some bits in SPI configuration registers can only be written when the SPI is disabled
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* (SPI_CR1_SPE bit =0), SPI IP should be in disabled state prior calling this function.
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* Otherwise, ERROR result will be returned.
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* @param SPIx SPI Instance
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* @param SPI_InitStruct pointer to a @ref LL_SPI_InitTypeDef structure
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* @retval An ErrorStatus enumeration value. (Return always SUCCESS)
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*/
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ErrorStatus LL_SPI_Init(SPI_TypeDef *SPIx, LL_SPI_InitTypeDef *SPI_InitStruct)
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{
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ErrorStatus status = ERROR;
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uint32_t tmp_nss;
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uint32_t tmp_mode;
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uint32_t tmp_nss_polarity;
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/* Check the SPI Instance SPIx*/
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assert_param(IS_SPI_ALL_INSTANCE(SPIx));
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/* Check the SPI parameters from SPI_InitStruct*/
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assert_param(IS_LL_SPI_TRANSFER_DIRECTION(SPI_InitStruct->TransferDirection));
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assert_param(IS_LL_SPI_MODE(SPI_InitStruct->Mode));
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assert_param(IS_LL_SPI_DATAWIDTH(SPI_InitStruct->DataWidth));
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assert_param(IS_LL_SPI_POLARITY(SPI_InitStruct->ClockPolarity));
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assert_param(IS_LL_SPI_PHASE(SPI_InitStruct->ClockPhase));
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assert_param(IS_LL_SPI_NSS(SPI_InitStruct->NSS));
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assert_param(IS_LL_SPI_BAUDRATEPRESCALER(SPI_InitStruct->BaudRate));
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assert_param(IS_LL_SPI_BITORDER(SPI_InitStruct->BitOrder));
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assert_param(IS_LL_SPI_CRCCALCULATION(SPI_InitStruct->CRCCalculation));
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/* Check the SPI instance is not enabled */
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if (LL_SPI_IsEnabled(SPIx) == 0x00000000UL)
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{
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/*---------------------------- SPIx CFG1 Configuration ------------------------
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* Configure SPIx CFG1 with parameters:
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* - Master Baud Rate : SPI_CFG1_MBR[2:0] bits
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* - CRC Computation Enable : SPI_CFG1_CRCEN bit
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* - Length of data frame : SPI_CFG1_DSIZE[4:0] bits
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*/
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MODIFY_REG(SPIx->CFG1, SPI_CFG1_MBR | SPI_CFG1_CRCEN | SPI_CFG1_DSIZE,
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SPI_InitStruct->BaudRate | SPI_InitStruct->CRCCalculation | SPI_InitStruct->DataWidth);
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tmp_nss = SPI_InitStruct->NSS;
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tmp_mode = SPI_InitStruct->Mode;
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tmp_nss_polarity = LL_SPI_GetNSSPolarity(SPIx);
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/* Checks to setup Internal SS signal level and avoid a MODF Error */
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if ((tmp_nss == LL_SPI_NSS_SOFT) && (((tmp_nss_polarity == LL_SPI_NSS_POLARITY_LOW) && \
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(tmp_mode == LL_SPI_MODE_MASTER)) || \
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((tmp_nss_polarity == LL_SPI_NSS_POLARITY_HIGH) && \
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(tmp_mode == LL_SPI_MODE_SLAVE))))
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{
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LL_SPI_SetInternalSSLevel(SPIx, LL_SPI_SS_LEVEL_HIGH);
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}
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/*---------------------------- SPIx CFG2 Configuration ------------------------
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* Configure SPIx CFG2 with parameters:
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* - NSS management : SPI_CFG2_SSM, SPI_CFG2_SSOE bits
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* - ClockPolarity : SPI_CFG2_CPOL bit
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* - ClockPhase : SPI_CFG2_CPHA bit
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* - BitOrder : SPI_CFG2_LSBFRST bit
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* - Master/Slave Mode : SPI_CFG2_MASTER bit
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* - SPI Mode : SPI_CFG2_COMM[1:0] bits
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*/
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MODIFY_REG(SPIx->CFG2, SPI_CFG2_SSM | SPI_CFG2_SSOE |
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SPI_CFG2_CPOL | SPI_CFG2_CPHA |
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SPI_CFG2_LSBFRST | SPI_CFG2_MASTER | SPI_CFG2_COMM,
|
|
SPI_InitStruct->NSS | SPI_InitStruct->ClockPolarity |
|
|
SPI_InitStruct->ClockPhase | SPI_InitStruct->BitOrder |
|
|
SPI_InitStruct->Mode | (SPI_InitStruct->TransferDirection & SPI_CFG2_COMM));
|
|
|
|
/*---------------------------- SPIx CR1 Configuration ------------------------
|
|
* Configure SPIx CR1 with parameter:
|
|
* - Half Duplex Direction : SPI_CR1_HDDIR bit
|
|
*/
|
|
MODIFY_REG(SPIx->CR1, SPI_CR1_HDDIR, SPI_InitStruct->TransferDirection & SPI_CR1_HDDIR);
|
|
|
|
/*---------------------------- SPIx CRCPOLY Configuration ----------------------
|
|
* Configure SPIx CRCPOLY with parameter:
|
|
* - CRCPoly : CRCPOLY[31:0] bits
|
|
*/
|
|
if (SPI_InitStruct->CRCCalculation == LL_SPI_CRCCALCULATION_ENABLE)
|
|
{
|
|
assert_param(IS_LL_SPI_CRC_POLYNOMIAL(SPI_InitStruct->CRCPoly));
|
|
LL_SPI_SetCRCPolynomial(SPIx, SPI_InitStruct->CRCPoly);
|
|
}
|
|
|
|
/* Activate the SPI mode (Reset I2SMOD bit in I2SCFGR register) */
|
|
CLEAR_BIT(SPIx->I2SCFGR, SPI_I2SCFGR_I2SMOD);
|
|
|
|
status = SUCCESS;
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
* @brief Set each @ref LL_SPI_InitTypeDef field to default value.
|
|
* @param SPI_InitStruct pointer to a @ref LL_SPI_InitTypeDef structure
|
|
* whose fields will be set to default values.
|
|
* @retval None
|
|
*/
|
|
void LL_SPI_StructInit(LL_SPI_InitTypeDef *SPI_InitStruct)
|
|
{
|
|
/* Set SPI_InitStruct fields to default values */
|
|
SPI_InitStruct->TransferDirection = LL_SPI_FULL_DUPLEX;
|
|
SPI_InitStruct->Mode = LL_SPI_MODE_SLAVE;
|
|
SPI_InitStruct->DataWidth = LL_SPI_DATAWIDTH_8BIT;
|
|
SPI_InitStruct->ClockPolarity = LL_SPI_POLARITY_LOW;
|
|
SPI_InitStruct->ClockPhase = LL_SPI_PHASE_1EDGE;
|
|
SPI_InitStruct->NSS = LL_SPI_NSS_HARD_INPUT;
|
|
SPI_InitStruct->BaudRate = LL_SPI_BAUDRATEPRESCALER_DIV2;
|
|
SPI_InitStruct->BitOrder = LL_SPI_MSB_FIRST;
|
|
SPI_InitStruct->CRCCalculation = LL_SPI_CRCCALCULATION_DISABLE;
|
|
SPI_InitStruct->CRCPoly = 7UL;
|
|
}
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
/** @addtogroup I2S_LL
|
|
* @{
|
|
*/
|
|
|
|
/* Private types -------------------------------------------------------------*/
|
|
/* Private variables ---------------------------------------------------------*/
|
|
/* Private constants ---------------------------------------------------------*/
|
|
/** @defgroup I2S_LL_Private_Constants I2S Private Constants
|
|
* @{
|
|
*/
|
|
/* I2S registers Masks */
|
|
#define I2S_I2SCFGR_CLEAR_MASK (SPI_I2SCFGR_CHLEN | SPI_I2SCFGR_DATLEN | \
|
|
SPI_I2SCFGR_DATFMT | SPI_I2SCFGR_CKPOL | \
|
|
SPI_I2SCFGR_I2SSTD | SPI_I2SCFGR_MCKOE | \
|
|
SPI_I2SCFGR_I2SCFG | SPI_I2SCFGR_I2SMOD )
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
/* Private macros ------------------------------------------------------------*/
|
|
/** @defgroup I2S_LL_Private_Macros I2S Private Macros
|
|
* @{
|
|
*/
|
|
|
|
#define IS_LL_I2S_DATAFORMAT(__VALUE__) (((__VALUE__) == LL_I2S_DATAFORMAT_16B) || \
|
|
((__VALUE__) == LL_I2S_DATAFORMAT_16B_EXTENDED) || \
|
|
((__VALUE__) == LL_I2S_DATAFORMAT_24B) || \
|
|
((__VALUE__) == LL_I2S_DATAFORMAT_24B_LEFT_ALIGNED) || \
|
|
((__VALUE__) == LL_I2S_DATAFORMAT_32B))
|
|
|
|
#define IS_LL_I2S_CHANNEL_LENGTH_TYPE (__VALUE__) (((__VALUE__) == LL_I2S_SLAVE_VARIABLE_CH_LENGTH) || \
|
|
((__VALUE__) == LL_I2S_SLAVE_FIXED_CH_LENGTH))
|
|
|
|
#define IS_LL_I2S_CKPOL(__VALUE__) (((__VALUE__) == LL_I2S_POLARITY_LOW) || \
|
|
((__VALUE__) == LL_I2S_POLARITY_HIGH))
|
|
|
|
#define IS_LL_I2S_STANDARD(__VALUE__) (((__VALUE__) == LL_I2S_STANDARD_PHILIPS) || \
|
|
((__VALUE__) == LL_I2S_STANDARD_MSB) || \
|
|
((__VALUE__) == LL_I2S_STANDARD_LSB) || \
|
|
((__VALUE__) == LL_I2S_STANDARD_PCM_SHORT) || \
|
|
((__VALUE__) == LL_I2S_STANDARD_PCM_LONG))
|
|
|
|
#define IS_LL_I2S_MODE(__VALUE__) (((__VALUE__) == LL_I2S_MODE_SLAVE_TX) || \
|
|
((__VALUE__) == LL_I2S_MODE_SLAVE_RX) || \
|
|
((__VALUE__) == LL_I2S_MODE_SLAVE_FULL_DUPLEX) || \
|
|
((__VALUE__) == LL_I2S_MODE_MASTER_TX) || \
|
|
((__VALUE__) == LL_I2S_MODE_MASTER_RX) || \
|
|
((__VALUE__) == LL_I2S_MODE_MASTER_FULL_DUPLEX))
|
|
|
|
#define IS_LL_I2S_MCLK_OUTPUT(__VALUE__) (((__VALUE__) == LL_I2S_MCLK_OUTPUT_ENABLE) || \
|
|
((__VALUE__) == LL_I2S_MCLK_OUTPUT_DISABLE))
|
|
|
|
#define IS_LL_I2S_AUDIO_FREQ(__VALUE__) ((((__VALUE__) >= LL_I2S_AUDIOFREQ_8K) && \
|
|
((__VALUE__) <= LL_I2S_AUDIOFREQ_192K)) || \
|
|
((__VALUE__) == LL_I2S_AUDIOFREQ_DEFAULT))
|
|
|
|
#define IS_LL_I2S_PRESCALER_LINEAR(__VALUE__) ((__VALUE__) <= 0xFFUL)
|
|
|
|
#define IS_LL_I2S_PRESCALER_PARITY(__VALUE__) (((__VALUE__) == LL_I2S_PRESCALER_PARITY_EVEN) || \
|
|
((__VALUE__) == LL_I2S_PRESCALER_PARITY_ODD))
|
|
|
|
#define IS_LL_I2S_FIFO_TH (__VALUE__) (((__VALUE__) == LL_I2S_LL_I2S_FIFO_TH_01DATA) || \
|
|
((__VALUE__) == LL_I2S_LL_I2S_FIFO_TH_02DATA) || \
|
|
((__VALUE__) == LL_I2S_LL_I2S_FIFO_TH_03DATA) || \
|
|
((__VALUE__) == LL_I2S_LL_I2S_FIFO_TH_04DATA) || \
|
|
((__VALUE__) == LL_I2S_LL_I2S_FIFO_TH_05DATA) || \
|
|
((__VALUE__) == LL_I2S_LL_I2S_FIFO_TH_06DATA) || \
|
|
((__VALUE__) == LL_I2S_LL_I2S_FIFO_TH_07DATA) || \
|
|
((__VALUE__) == LL_I2S_LL_I2S_FIFO_TH_08DATA))
|
|
|
|
#define IS_LL_I2S_BIT_ORDER(__VALUE__) (((__VALUE__) == LL_I2S_LSB_FIRST) || \
|
|
((__VALUE__) == LL_I2S_MSB_FIRST))
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/* Private function prototypes -----------------------------------------------*/
|
|
|
|
/* Exported functions --------------------------------------------------------*/
|
|
/** @addtogroup I2S_LL_Exported_Functions
|
|
* @{
|
|
*/
|
|
|
|
/** @addtogroup I2S_LL_EF_Init
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @brief De-initialize the SPI/I2S registers to their default reset values.
|
|
* @param SPIx SPI Instance
|
|
* @retval An ErrorStatus enumeration value:
|
|
* - SUCCESS: SPI registers are de-initialized
|
|
* - ERROR: SPI registers are not de-initialized
|
|
*/
|
|
ErrorStatus LL_I2S_DeInit(SPI_TypeDef *SPIx)
|
|
{
|
|
return LL_SPI_DeInit(SPIx);
|
|
}
|
|
|
|
/**
|
|
* @brief Initializes the SPI/I2S registers according to the specified parameters in I2S_InitStruct.
|
|
* @note As some bits in I2S configuration registers can only be written when the SPI is disabled
|
|
* (SPI_CR1_SPE bit =0), SPI IP should be in disabled state prior calling this function.
|
|
* Otherwise, ERROR result will be returned.
|
|
* @note I2S (SPI) source clock must be ready before calling this function. Otherwise will results
|
|
* in wrong programming.
|
|
* @param SPIx SPI Instance
|
|
* @param I2S_InitStruct pointer to a @ref LL_I2S_InitTypeDef structure
|
|
* @retval An ErrorStatus enumeration value:
|
|
* - SUCCESS: SPI registers are Initialized
|
|
* - ERROR: SPI registers are not Initialized
|
|
*/
|
|
ErrorStatus LL_I2S_Init(SPI_TypeDef *SPIx, LL_I2S_InitTypeDef *I2S_InitStruct)
|
|
{
|
|
uint32_t i2sdiv = 0UL;
|
|
uint32_t i2sodd = 0UL;
|
|
uint32_t packetlength = 1UL;
|
|
uint32_t ispcm = 0UL;
|
|
uint32_t tmp;
|
|
uint32_t sourceclock;
|
|
|
|
ErrorStatus status = ERROR;
|
|
|
|
/* Check the I2S parameters */
|
|
assert_param(IS_I2S_ALL_INSTANCE(SPIx));
|
|
assert_param(IS_LL_I2S_MODE(I2S_InitStruct->Mode));
|
|
assert_param(IS_LL_I2S_STANDARD(I2S_InitStruct->Standard));
|
|
assert_param(IS_LL_I2S_DATAFORMAT(I2S_InitStruct->DataFormat));
|
|
assert_param(IS_LL_I2S_MCLK_OUTPUT(I2S_InitStruct->MCLKOutput));
|
|
assert_param(IS_LL_I2S_AUDIO_FREQ(I2S_InitStruct->AudioFreq));
|
|
assert_param(IS_LL_I2S_CKPOL(I2S_InitStruct->ClockPolarity));
|
|
|
|
/* Check that SPE bit is set to 0 in order to be sure that SPI/I2S block is disabled.
|
|
* In this case, it is useless to check if the I2SMOD bit is set to 0 because
|
|
* this bit I2SMOD only serves to select the desired mode.
|
|
*/
|
|
if (LL_SPI_IsEnabled(SPIx) == 0x00000000UL)
|
|
{
|
|
/*---------------------------- SPIx I2SCFGR Configuration --------------------
|
|
* Configure SPIx I2SCFGR with parameters:
|
|
* - Mode : SPI_I2SCFGR_I2SCFG[2:0] bits
|
|
* - Standard : SPI_I2SCFGR_I2SSTD[1:0] and SPI_I2SCFGR_PCMSYNC bits
|
|
* - DataFormat : SPI_I2SCFGR_CHLEN, SPI_I2SCFGR_DATFMT and SPI_I2SCFGR_DATLEN[1:0] bits
|
|
* - ClockPolarity : SPI_I2SCFGR_CKPOL bit
|
|
* - MCLKOutput : SPI_I2SPR_MCKOE bit
|
|
* - I2S mode : SPI_I2SCFGR_I2SMOD bit
|
|
*/
|
|
|
|
/* Write to SPIx I2SCFGR */
|
|
MODIFY_REG(SPIx->I2SCFGR,
|
|
I2S_I2SCFGR_CLEAR_MASK,
|
|
I2S_InitStruct->Mode | I2S_InitStruct->Standard |
|
|
I2S_InitStruct->DataFormat | I2S_InitStruct->ClockPolarity |
|
|
I2S_InitStruct->MCLKOutput | SPI_I2SCFGR_I2SMOD);
|
|
|
|
/*---------------------------- SPIx I2SCFGR Configuration ----------------------
|
|
* Configure SPIx I2SCFGR with parameters:
|
|
* - AudioFreq : SPI_I2SCFGR_I2SDIV[7:0] and SPI_I2SCFGR_ODD bits
|
|
*/
|
|
|
|
/* If the requested audio frequency is not the default, compute the prescaler (i2sodd, i2sdiv)
|
|
* else, default values are used: i2sodd = 0U, i2sdiv = 0U.
|
|
*/
|
|
if (I2S_InitStruct->AudioFreq != LL_I2S_AUDIOFREQ_DEFAULT)
|
|
{
|
|
/* Check the frame length (For the Prescaler computing)
|
|
* Default value: LL_I2S_DATAFORMAT_16B (packetlength = 1U).
|
|
*/
|
|
if (I2S_InitStruct->DataFormat != LL_I2S_DATAFORMAT_16B)
|
|
{
|
|
/* Packet length is 32 bits */
|
|
packetlength = 2UL;
|
|
}
|
|
|
|
/* Check if PCM standard is used */
|
|
if ((I2S_InitStruct->Standard == LL_I2S_STANDARD_PCM_SHORT) ||
|
|
(I2S_InitStruct->Standard == LL_I2S_STANDARD_PCM_LONG))
|
|
{
|
|
ispcm = 1UL;
|
|
}
|
|
|
|
/* Get the I2S (SPI) source clock value */
|
|
#if defined (SPI_SPI6I2S_SUPPORT)
|
|
if (SPIx == SPI6)
|
|
{
|
|
sourceclock = LL_RCC_GetSPIClockFreq(LL_RCC_SPI6_CLKSOURCE);
|
|
}
|
|
else
|
|
{
|
|
sourceclock = LL_RCC_GetSPIClockFreq(LL_RCC_SPI123_CLKSOURCE);
|
|
}
|
|
#else
|
|
sourceclock = LL_RCC_GetSPIClockFreq(LL_RCC_SPI123_CLKSOURCE);
|
|
#endif /* SPI_SPI6I2S_SUPPORT */
|
|
|
|
/* Compute the Real divider depending on the MCLK output state with a fixed point */
|
|
if (I2S_InitStruct->MCLKOutput == LL_I2S_MCLK_OUTPUT_ENABLE)
|
|
{
|
|
/* MCLK output is enabled */
|
|
tmp = (((sourceclock / (256UL >> ispcm)) * 16UL) / I2S_InitStruct->AudioFreq) + 8UL;
|
|
}
|
|
else
|
|
{
|
|
/* MCLK output is disabled */
|
|
tmp = (((sourceclock / ((32UL >> ispcm) * packetlength)) * 16UL) / I2S_InitStruct->AudioFreq) + 8UL;
|
|
}
|
|
|
|
/* Remove the fixed point */
|
|
tmp = tmp / 16UL;
|
|
|
|
/* Check the parity of the divider */
|
|
i2sodd = tmp & 0x1UL;
|
|
|
|
/* Compute the i2sdiv prescaler */
|
|
i2sdiv = tmp / 2UL;
|
|
}
|
|
|
|
/* Test if the obtain values are forbidden or out of range */
|
|
if (((i2sodd == 1UL) && (i2sdiv == 1UL)) || (i2sdiv > 0xFFUL))
|
|
{
|
|
/* Set the default values */
|
|
i2sdiv = 0UL;
|
|
i2sodd = 0UL;
|
|
}
|
|
|
|
/* Write to SPIx I2SCFGR register the computed value */
|
|
MODIFY_REG(SPIx->I2SCFGR,
|
|
SPI_I2SCFGR_ODD | SPI_I2SCFGR_I2SDIV,
|
|
(i2sodd << SPI_I2SCFGR_ODD_Pos) | (i2sdiv << SPI_I2SCFGR_I2SDIV_Pos));
|
|
|
|
status = SUCCESS;
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
* @brief Set each @ref LL_I2S_InitTypeDef field to default value.
|
|
* @param I2S_InitStruct pointer to a @ref LL_I2S_InitTypeDef structure
|
|
* whose fields will be set to default values.
|
|
* @retval None
|
|
*/
|
|
void LL_I2S_StructInit(LL_I2S_InitTypeDef *I2S_InitStruct)
|
|
{
|
|
/*--------------- Reset I2S init structure parameters values -----------------*/
|
|
I2S_InitStruct->Mode = LL_I2S_MODE_SLAVE_TX;
|
|
I2S_InitStruct->Standard = LL_I2S_STANDARD_PHILIPS;
|
|
I2S_InitStruct->DataFormat = LL_I2S_DATAFORMAT_16B;
|
|
I2S_InitStruct->MCLKOutput = LL_I2S_MCLK_OUTPUT_DISABLE;
|
|
I2S_InitStruct->AudioFreq = LL_I2S_AUDIOFREQ_DEFAULT;
|
|
I2S_InitStruct->ClockPolarity = LL_I2S_POLARITY_LOW;
|
|
}
|
|
|
|
/**
|
|
* @brief Set linear and parity prescaler.
|
|
* @note To calculate value of PrescalerLinear(I2SDIV[7:0] bits) and PrescalerParity(ODD bit)\n
|
|
* Check Audio frequency table and formulas inside Reference Manual (SPI/I2S).
|
|
* @param SPIx SPI Instance
|
|
* @param PrescalerLinear Value between Min_Data=0x00 and Max_Data=0xFF
|
|
* @note PrescalerLinear '1' is not authorized with parity LL_I2S_PRESCALER_PARITY_ODD
|
|
* @param PrescalerParity This parameter can be one of the following values:
|
|
* @arg @ref LL_I2S_PRESCALER_PARITY_EVEN
|
|
* @arg @ref LL_I2S_PRESCALER_PARITY_ODD
|
|
* @retval None
|
|
*/
|
|
void LL_I2S_ConfigPrescaler(SPI_TypeDef *SPIx, uint32_t PrescalerLinear, uint32_t PrescalerParity)
|
|
{
|
|
/* Check the I2S parameters */
|
|
assert_param(IS_I2S_ALL_INSTANCE(SPIx));
|
|
assert_param(IS_LL_I2S_PRESCALER_LINEAR(PrescalerLinear));
|
|
assert_param(IS_LL_I2S_PRESCALER_PARITY(PrescalerParity));
|
|
|
|
/* Write to SPIx I2SPR */
|
|
MODIFY_REG(SPIx->I2SCFGR, SPI_I2SCFGR_I2SDIV | SPI_I2SCFGR_ODD, (PrescalerLinear << SPI_I2SCFGR_I2SDIV_Pos) |
|
|
(PrescalerParity << SPI_I2SCFGR_ODD_Pos));
|
|
}
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
#endif /* defined(SPI1) || defined(SPI2) || defined(SPI3) || defined(SPI4) || defined(SPI5) || defined(SPI6) */
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
#endif /* USE_FULL_LL_DRIVER */
|