stm32g4xx_ll_spi.c

转至该文件的文档。

/**
  ******************************************************************************
  * @file    stm32g4xx_ll_spi.c
  * @author  MCD Application Team
  * @brief   SPI LL module driver.
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2019 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.
  *
  ******************************************************************************
  */
#if defined(USE_FULL_LL_DRIVER)

/* Includes ------------------------------------------------------------------*/
#include "stm32g4xx_ll_spi.h"
#include "stm32g4xx_ll_bus.h"
#include "stm32g4xx_ll_rcc.h"

#ifdef  USE_FULL_ASSERT
#include "stm32_assert.h"
#else
#define assert_param(expr) ((void)0U)
#endif /* USE_FULL_ASSERT */

/** @addtogroup STM32G4xx_LL_Driver
  * @{
  */

#if defined (SPI1) || defined (SPI2) || defined (SPI3) || defined (SPI4)

/** @addtogroup SPI_LL
  * @{
  */

/* Private types -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/

/* Private constants ---------------------------------------------------------*/
/** @defgroup SPI_LL_Private_Constants SPI Private Constants
  * @{
  */
/* SPI registers Masks */
#define SPI_CR1_CLEAR_MASK                 (SPI_CR1_CPHA    | SPI_CR1_CPOL     | SPI_CR1_MSTR   | \
                                            SPI_CR1_BR      | SPI_CR1_LSBFIRST | SPI_CR1_SSI    | \
                                            SPI_CR1_SSM     | SPI_CR1_RXONLY   | SPI_CR1_CRCL   | \
                                            SPI_CR1_CRCNEXT | SPI_CR1_CRCEN    | SPI_CR1_BIDIOE | \
                                            SPI_CR1_BIDIMODE)
/**
  * @}
  */

/* Private macros ------------------------------------------------------------*/
/** @defgroup SPI_LL_Private_Macros SPI Private Macros
  * @{
  */
#define IS_LL_SPI_TRANSFER_DIRECTION(__VALUE__) (((__VALUE__) == LL_SPI_FULL_DUPLEX)       \
                                                 || ((__VALUE__) == LL_SPI_SIMPLEX_RX)     \
                                                 || ((__VALUE__) == LL_SPI_HALF_DUPLEX_RX) \
                                                 || ((__VALUE__) == LL_SPI_HALF_DUPLEX_TX))

#define IS_LL_SPI_MODE(__VALUE__) (((__VALUE__) == LL_SPI_MODE_MASTER) \
                                   || ((__VALUE__) == LL_SPI_MODE_SLAVE))

#define IS_LL_SPI_DATAWIDTH(__VALUE__) (((__VALUE__) == LL_SPI_DATAWIDTH_4BIT)     \
                                        || ((__VALUE__) == LL_SPI_DATAWIDTH_5BIT)  \
                                        || ((__VALUE__) == LL_SPI_DATAWIDTH_6BIT)  \
                                        || ((__VALUE__) == LL_SPI_DATAWIDTH_7BIT)  \
                                        || ((__VALUE__) == LL_SPI_DATAWIDTH_8BIT)  \
                                        || ((__VALUE__) == LL_SPI_DATAWIDTH_9BIT)  \
                                        || ((__VALUE__) == LL_SPI_DATAWIDTH_10BIT) \
                                        || ((__VALUE__) == LL_SPI_DATAWIDTH_11BIT) \
                                        || ((__VALUE__) == LL_SPI_DATAWIDTH_12BIT) \
                                        || ((__VALUE__) == LL_SPI_DATAWIDTH_13BIT) \
                                        || ((__VALUE__) == LL_SPI_DATAWIDTH_14BIT) \
                                        || ((__VALUE__) == LL_SPI_DATAWIDTH_15BIT) \
                                        || ((__VALUE__) == LL_SPI_DATAWIDTH_16BIT))

#define IS_LL_SPI_POLARITY(__VALUE__) (((__VALUE__) == LL_SPI_POLARITY_LOW) \
                                       || ((__VALUE__) == LL_SPI_POLARITY_HIGH))

#define IS_LL_SPI_PHASE(__VALUE__) (((__VALUE__) == LL_SPI_PHASE_1EDGE) \
                                    || ((__VALUE__) == LL_SPI_PHASE_2EDGE))

#define IS_LL_SPI_NSS(__VALUE__) (((__VALUE__) == LL_SPI_NSS_SOFT)          \
                                  || ((__VALUE__) == LL_SPI_NSS_HARD_INPUT) \
                                  || ((__VALUE__) == LL_SPI_NSS_HARD_OUTPUT))

#define IS_LL_SPI_BAUDRATE(__VALUE__) (((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV2)      \
                                       || ((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV4)   \
                                       || ((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV8)   \
                                       || ((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV16)  \
                                       || ((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV32)  \
                                       || ((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV64)  \
                                       || ((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV128) \
                                       || ((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV256))

#define IS_LL_SPI_BITORDER(__VALUE__) (((__VALUE__) == LL_SPI_LSB_FIRST) \
                                       || ((__VALUE__) == LL_SPI_MSB_FIRST))

#define IS_LL_SPI_CRCCALCULATION(__VALUE__) (((__VALUE__) == LL_SPI_CRCCALCULATION_ENABLE) \
                                             || ((__VALUE__) == LL_SPI_CRCCALCULATION_DISABLE))

#define IS_LL_SPI_CRC_POLYNOMIAL(__VALUE__) ((__VALUE__) >= 0x1U)

/**
  * @}
  */

/* Private function prototypes -----------------------------------------------*/

/* Exported functions --------------------------------------------------------*/
/** @addtogroup SPI_LL_Exported_Functions
  * @{
  */

/** @addtogroup SPI_LL_EF_Init
  * @{
  */

/**
  * @brief  De-initialize the SPI 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_SPI_DeInit(const SPI_TypeDef *SPIx)
{
  ErrorStatus status = ERROR;

  /* Check the parameters */
  assert_param(IS_SPI_ALL_INSTANCE(SPIx));

#if defined(SPI1)
  if (SPIx == SPI1)
  {
    /* Force reset of SPI clock */
    LL_APB2_GRP1_ForceReset(LL_APB2_GRP1_PERIPH_SPI1);

    /* Release reset of SPI clock */
    LL_APB2_GRP1_ReleaseReset(LL_APB2_GRP1_PERIPH_SPI1);

    status = SUCCESS;
  }
#endif /* SPI1 */
#if defined(SPI2)
  if (SPIx == SPI2)
  {
    /* Force reset of SPI clock */
    LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_SPI2);

    /* Release reset of SPI clock */
    LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_SPI2);

    status = SUCCESS;
  }
#endif /* SPI2 */
#if defined(SPI3)
  if (SPIx == SPI3)
  {
    /* Force reset of SPI clock */
    LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_SPI3);

    /* Release reset of SPI clock */
    LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_SPI3);

    status = SUCCESS;
  }
#endif /* SPI3 */
#if defined(SPI4)
  if (SPIx == SPI4)
  {
    /* Force reset of SPI clock */
    LL_APB2_GRP1_ForceReset(LL_APB2_GRP1_PERIPH_SPI4);

    /* Release reset of SPI clock */
    LL_APB2_GRP1_ReleaseReset(LL_APB2_GRP1_PERIPH_SPI4);

    status = SUCCESS;
  }
#endif