lib/main/STM32F7/Drivers/STM32F7xx_HAL_Driver/Src/stm32f7xx_ll_crc.c

   1 /**
   2   ******************************************************************************
   3   * @file    stm32f7xx_ll_crc.c
   4   * @author  MCD Application Team
   5   * @brief   CRC LL module driver.
   6   ******************************************************************************
   7   * @attention
   8   *
   9   * <h2><center>&copy; Copyright (c) 2017 STMicroelectronics.
  10   * All rights reserved.</center></h2>
  11   *
  12   * This software component is licensed by ST under BSD 3-Clause license,
  13   * the "License"; You may not use this file except in compliance with the
  14   * License. You may obtain a copy of the License at:
  15   *                        opensource.org/licenses/BSD-3-Clause
  16   *
  17   ******************************************************************************
  18   */
  19 #if defined(USE_FULL_LL_DRIVER)
  20
  21 /* Includes ------------------------------------------------------------------*/
  22 #include "stm32f7xx_ll_crc.h"
  23 #include "stm32f7xx_ll_bus.h"
  24
  25 #ifdef  USE_FULL_ASSERT
  26 #include "stm32_assert.h"
  27 #else
  28 #define assert_param(expr) ((void)0U)
  29 #endif
  30
  31 /** @addtogroup STM32F7xx_LL_Driver
  32   * @{
  33   */
  34
  35 #if defined (CRC)
  36
  37 /** @addtogroup CRC_LL
  38   * @{
  39   */
  40
  41 /* Private types -------------------------------------------------------------*/
  42 /* Private variables ---------------------------------------------------------*/
  43 /* Private constants ---------------------------------------------------------*/
  44 /* Private macros ------------------------------------------------------------*/
  45 /* Private function prototypes -----------------------------------------------*/
  46
  47 /* Exported functions --------------------------------------------------------*/
  48 /** @addtogroup CRC_LL_Exported_Functions
  49   * @{
  50   */
  51
  52 /** @addtogroup CRC_LL_EF_Init
  53   * @{
  54   */
  55
  56 /**
  57   * @brief  De-initialize CRC registers (Registers restored to their default values).
  58   * @param  CRCx CRC Instance
  59   * @retval An ErrorStatus enumeration value:
  60   *          - SUCCESS: CRC registers are de-initialized
  61   *          - ERROR: CRC registers are not de-initialized
  62   */
  63 ErrorStatus LL_CRC_DeInit(CRC_TypeDef *CRCx)
  64 {
  65   ErrorStatus status = SUCCESS;
  66
  67   /* Check the parameters */
  68   assert_param(IS_CRC_ALL_INSTANCE(CRCx));
  69
  70   if (CRCx == CRC)
  71   {
  72     /* Force CRC reset */
  73     LL_AHB1_GRP1_ForceReset(LL_AHB1_GRP1_PERIPH_CRC);
  74
  75     /* Release CRC reset */
  76     LL_AHB1_GRP1_ReleaseReset(LL_AHB1_GRP1_PERIPH_CRC);
  77   }
  78   else
  79   {
  80     status = ERROR;
  81   }
  82
  83   return (status);
  84 }
  85
  86 /**
  87   * @}
  88   */
  89
  90 /**
  91   * @}
  92   */
  93
  94 /**
  95   * @}
  96   */
  97
  98 #endif /* defined (CRC) */
  99
 100 /**
 101   * @}
 102   */
 103
 104 #endif /* USE_FULL_LL_DRIVER */
 105
 106 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
 107