1 /**
2   ******************************************************************************
3   * @file    stm32f4xx_ll_rng.c
4   * @author  MCD Application Team
5   * @brief   RNG LL module driver.
6   ******************************************************************************
7   * @attention
8   *
9   * Copyright (c) 2016 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 "stm32f4xx_ll_rng.h"
22 #include "stm32f4xx_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 STM32F4xx_LL_Driver
31   * @{
32   */
33 
34 #if defined (RNG)
35 
36 /** @addtogroup RNG_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 RNG_LL_Exported_Functions
48   * @{
49   */
50 
51 /** @addtogroup RNG_LL_EF_Init
52   * @{
53   */
54 
55 /**
56   * @brief  De-initialize RNG registers (Registers restored to their default values).
57   * @param  RNGx RNG Instance
58   * @retval An ErrorStatus enumeration value:
59   *          - SUCCESS: RNG registers are de-initialized
60   *          - ERROR: not applicable
61   */
LL_RNG_DeInit(RNG_TypeDef * RNGx)62 ErrorStatus LL_RNG_DeInit(RNG_TypeDef *RNGx)
63 {
64   ErrorStatus status = SUCCESS;
65 
66   /* Check the parameters */
67   assert_param(IS_RNG_ALL_INSTANCE(RNGx));
68   if (RNGx == RNG)
69   {
70 #if !defined(RCC_AHB2_SUPPORT)
71     /* Enable RNG reset state */
72     LL_AHB1_GRP1_ForceReset(LL_AHB1_GRP1_PERIPH_RNG);
73 
74     /* Release RNG from reset state */
75     LL_AHB1_GRP1_ReleaseReset(LL_AHB1_GRP1_PERIPH_RNG);
76 #else
77     /* Enable RNG reset state */
78     LL_AHB2_GRP1_ForceReset(LL_AHB2_GRP1_PERIPH_RNG);
79 
80   /* Release RNG from reset state */
81     LL_AHB2_GRP1_ReleaseReset(LL_AHB2_GRP1_PERIPH_RNG);
82 #endif /* !RCC_AHB2_SUPPORT */
83   }
84   else
85   {
86     status = ERROR;
87   }
88 
89   return status;
90 }
91 
92 /**
93   * @}
94   */
95 
96 /**
97   * @}
98   */
99 
100 /**
101   * @}
102   */
103 
104 #endif /* RNG */
105 
106 /**
107   * @}
108   */
109 
110 #endif /* USE_FULL_LL_DRIVER */
111 
112