1 /**
2   ******************************************************************************
3   * @file    stm32l1xx_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 "stm32l1xx_ll_crc.h"
23 #include "stm32l1xx_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/* USE_FULL_ASSERT */
30 
31 /** @addtogroup STM32L1xx_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   */
LL_CRC_DeInit(CRC_TypeDef * CRCx)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 
108