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   * @version V1.2.2
   6   * @date    14-April-2017
   7   * @brief   CRC LL module driver.
   8   ******************************************************************************
   9   * @attention
  10   *
  11   * <h2><center>&copy; COPYRIGHT(c) 2017 STMicroelectronics</center></h2>
  12   *
  13   * Redistribution and use in source and binary forms, with or without modification,
  14   * are permitted provided that the following conditions are met:
  15   *   1. Redistributions of source code must retain the above copyright notice,
  16   *      this list of conditions and the following disclaimer.
  17   *   2. Redistributions in binary form must reproduce the above copyright notice,
  18   *      this list of conditions and the following disclaimer in the documentation
  19   *      and/or other materials provided with the distribution.
  20   *   3. Neither the name of STMicroelectronics nor the names of its contributors
  21   *      may be used to endorse or promote products derived from this software
  22   *      without specific prior written permission.
  23   *
  24   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  25   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  27   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  28   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  30   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  31   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  32   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  33   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34   *
  35   ******************************************************************************
  36   */
  37 #if defined(USE_FULL_LL_DRIVER)
  38
  39 /* Includes ------------------------------------------------------------------*/
  40 #include "stm32f7xx_ll_crc.h"
  41 #include "stm32f7xx_ll_bus.h"
  42
  43 #ifdef  USE_FULL_ASSERT
  44 #include "stm32_assert.h"
  45 #else
  46 #define assert_param(expr) ((void)0U)
  47 #endif
  48
  49 /** @addtogroup STM32F7xx_LL_Driver
  50   * @{
  51   */
  52
  53 #if defined (CRC)
  54
  55 /** @addtogroup CRC_LL
  56   * @{
  57   */
  58
  59 /* Private types -------------------------------------------------------------*/
  60 /* Private variables ---------------------------------------------------------*/
  61 /* Private constants ---------------------------------------------------------*/
  62 /* Private macros ------------------------------------------------------------*/
  63 /* Private function prototypes -----------------------------------------------*/
  64
  65 /* Exported functions --------------------------------------------------------*/
  66 /** @addtogroup CRC_LL_Exported_Functions
  67   * @{
  68   */
  69
  70 /** @addtogroup CRC_LL_EF_Init
  71   * @{
  72   */
  73
  74 /**
  75   * @brief  De-initialize CRC registers (Registers restored to their default values).
  76   * @param  CRCx CRC Instance
  77   * @retval An ErrorStatus enumeration value:
  78   *          - SUCCESS: CRC registers are de-initialized
  79   *          - ERROR: CRC registers are not de-initialized
  80   */
  81 ErrorStatus LL_CRC_DeInit(CRC_TypeDef *CRCx)
  82 {
  83   ErrorStatus status = SUCCESS;
  84
  85   /* Check the parameters */
  86   assert_param(IS_CRC_ALL_INSTANCE(CRCx));
  87
  88   if (CRCx == CRC)
  89   {
  90     /* Force CRC reset */
  91     LL_AHB1_GRP1_ForceReset(LL_AHB1_GRP1_PERIPH_CRC);
  92
  93     /* Release CRC reset */
  94     LL_AHB1_GRP1_ReleaseReset(LL_AHB1_GRP1_PERIPH_CRC);
  95   }
  96   else
  97   {
  98     status = ERROR;
  99   }
 100
 101   return (status);
 102 }
 103
 104 /**
 105   * @}
 106   */
 107
 108 /**
 109   * @}
 110   */
 111
 112 /**
 113   * @}
 114   */
 115
 116 #endif /* defined (CRC) */
 117
 118 /**
 119   * @}
 120   */
 121
 122 #endif /* USE_FULL_LL_DRIVER */
 123
 124 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
 125