1 /**
2   ******************************************************************************
3   * @file    stm32g0xx_ll_crc.c
4   * @author  MCD Application Team
5   * @brief   CRC LL module driver.
6   ******************************************************************************
7   * @attention
8   *
9   * Copyright (c) 2018 STMicroelectronics.
10   * All rights reserved.
11   *
12   * This software is licensed under terms that can be found in the LICENSE file
13   * in the root directory of this software component.
14   * If no LICENSE file comes with this software, it is provided AS-IS.
15   *
16   ******************************************************************************
17   */
18 #if defined(USE_FULL_LL_DRIVER)
19 
20 /* Includes ------------------------------------------------------------------*/
21 #include "stm32g0xx_ll_crc.h"
22 #include "stm32g0xx_ll_bus.h"
23 
24 #ifdef  USE_FULL_ASSERT
25 #include "stm32_assert.h"
26 #else
27 #define assert_param(expr) ((void)0U)
28 #endif /* USE_FULL_ASSERT */
29 
30 /** @addtogroup STM32G0xx_LL_Driver
31   * @{
32   */
33 
34 #if defined (CRC)
35 
36 /** @addtogroup CRC_LL
37   * @{
38   */
39 
40 /* Private types -------------------------------------------------------------*/
41 /* Private variables ---------------------------------------------------------*/
42 /* Private constants ---------------------------------------------------------*/
43 /* Private macros ------------------------------------------------------------*/
44 /* Private function prototypes -----------------------------------------------*/
45 
46 /* Exported functions --------------------------------------------------------*/
47 /** @addtogroup CRC_LL_Exported_Functions
48   * @{
49   */
50 
51 /** @addtogroup CRC_LL_EF_Init
52   * @{
53   */
54 
55 /**
56   * @brief  De-initialize CRC registers (Registers restored to their default values).
57   * @param  CRCx CRC Instance
58   * @retval An ErrorStatus enumeration value:
59   *          - SUCCESS: CRC registers are de-initialized
60   *          - ERROR: CRC registers are not de-initialized
61   */
LL_CRC_DeInit(CRC_TypeDef * CRCx)62 ErrorStatus LL_CRC_DeInit(CRC_TypeDef *CRCx)
63 {
64   ErrorStatus status = SUCCESS;
65 
66   /* Check the parameters */
67   assert_param(IS_CRC_ALL_INSTANCE(CRCx));
68 
69   if (CRCx == CRC)
70   {
71     /* Force CRC reset */
72     LL_AHB1_GRP1_ForceReset(LL_AHB1_GRP1_PERIPH_CRC);
73 
74     /* Release CRC reset */
75     LL_AHB1_GRP1_ReleaseReset(LL_AHB1_GRP1_PERIPH_CRC);
76   }
77   else
78   {
79     status = ERROR;
80   }
81 
82   return (status);
83 }
84 
85 /**
86   * @}
87   */
88 
89 /**
90   * @}
91   */
92 
93 /**
94   * @}
95   */
96 
97 #endif /* defined (CRC) */
98 
99 /**
100   * @}
101   */
102 
103 #endif /* USE_FULL_LL_DRIVER */
104