1 /**
2   ******************************************************************************
3   * @file    stm32h7xx_ll_rng.c
4   * @author  MCD Application Team
5   * @brief   RNG LL module driver.
6   ******************************************************************************
7   * @attention
8   *
9   * Copyright (c) 2017 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 "stm32h7xx_ll_rng.h"
22 #include "stm32h7xx_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 STM32H7xx_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 /** @defgroup RNG_LL_Private_Macros RNG Private Macros
45   * @{
46   */
47 #define IS_LL_RNG_CED(__MODE__) (((__MODE__) == LL_RNG_CED_ENABLE) || \
48                                  ((__MODE__) == LL_RNG_CED_DISABLE))
49 
50 #if defined(RNG_CR_CONDRST)
51 #define IS_LL_RNG_CLOCK_DIVIDER(__CLOCK_DIV__) ((__CLOCK_DIV__) <=0x0Fu)
52 
53 
54 #define IS_LL_RNG_NIST_COMPLIANCE(__NIST_COMPLIANCE__) (((__NIST_COMPLIANCE__) == LL_RNG_NIST_COMPLIANT) || \
55                                                         ((__NIST_COMPLIANCE__) == LL_RNG_NOTNIST_COMPLIANT))
56 
57 #define IS_LL_RNG_CONFIG1 (__CONFIG1__) ((__CONFIG1__) <= 0x3FUL)
58 
59 #define IS_LL_RNG_CONFIG2 (__CONFIG2__) ((__CONFIG2__) <= 0x07UL)
60 
61 #define IS_LL_RNG_CONFIG3 (__CONFIG3__) ((__CONFIG3__) <= 0xFUL)
62 #endif /* RNG_CR_CONDRST*/
63 /**
64   * @}
65   */
66 /* Private function prototypes -----------------------------------------------*/
67 
68 /* Exported functions --------------------------------------------------------*/
69 /** @addtogroup RNG_LL_Exported_Functions
70   * @{
71   */
72 
73 /** @addtogroup RNG_LL_EF_Init
74   * @{
75   */
76 
77 /**
78   * @brief  De-initialize RNG registers (Registers restored to their default values).
79   * @param  RNGx RNG Instance
80   * @retval An ErrorStatus enumeration value:
81   *          - SUCCESS: RNG registers are de-initialized
82   *          - ERROR: not applicable
83   */
LL_RNG_DeInit(RNG_TypeDef * RNGx)84 ErrorStatus LL_RNG_DeInit(RNG_TypeDef *RNGx)
85 {
86   ErrorStatus status = SUCCESS;
87 
88   /* Check the parameters */
89   assert_param(IS_RNG_ALL_INSTANCE(RNGx));
90   if (RNGx == RNG)
91   {
92     /* Enable RNG reset state */
93     LL_AHB2_GRP1_ForceReset(LL_AHB2_GRP1_PERIPH_RNG);
94 
95     /* Release RNG from reset state */
96     LL_AHB2_GRP1_ReleaseReset(LL_AHB2_GRP1_PERIPH_RNG);
97   }
98   else
99   {
100     status = ERROR;
101   }
102 
103   return status;
104 }
105 
106 /**
107   * @brief  Initialize RNG registers according to the specified parameters in RNG_InitStruct.
108   * @param  RNGx RNG Instance
109   * @param  RNG_InitStruct pointer to a LL_RNG_InitTypeDef structure
110   *         that contains the configuration information for the specified RNG peripheral.
111   * @retval An ErrorStatus enumeration value:
112   *          - SUCCESS: RNG registers are initialized according to RNG_InitStruct content
113   *          - ERROR: not applicable
114   */
LL_RNG_Init(RNG_TypeDef * RNGx,LL_RNG_InitTypeDef * RNG_InitStruct)115 ErrorStatus LL_RNG_Init(RNG_TypeDef *RNGx, LL_RNG_InitTypeDef *RNG_InitStruct)
116 {
117   /* Check the parameters */
118   assert_param(IS_RNG_ALL_INSTANCE(RNGx));
119   assert_param(IS_LL_RNG_CED(RNG_InitStruct->ClockErrorDetection));
120 
121 #if defined(RNG_CR_CONDRST)
122   /* Clock Error Detection Configuration when CONDRT bit is set to 1 */
123   MODIFY_REG(RNGx->CR, RNG_CR_CED | RNG_CR_CONDRST, RNG_InitStruct->ClockErrorDetection | RNG_CR_CONDRST);
124   /* Writing bits CONDRST=0*/
125   CLEAR_BIT(RNGx->CR, RNG_CR_CONDRST);
126 #else
127   /* Clock Error Detection configuration */
128   MODIFY_REG(RNGx->CR, RNG_CR_CED, RNG_InitStruct->ClockErrorDetection);
129 #endif /* RNG_CR_CONDRST */
130 
131   return (SUCCESS);
132 }
133 
134 /**
135   * @brief Set each @ref LL_RNG_InitTypeDef field to default value.
136   * @param RNG_InitStruct pointer to a @ref LL_RNG_InitTypeDef structure
137   *                       whose fields will be set to default values.
138   * @retval None
139   */
LL_RNG_StructInit(LL_RNG_InitTypeDef * RNG_InitStruct)140 void LL_RNG_StructInit(LL_RNG_InitTypeDef *RNG_InitStruct)
141 {
142   /* Set RNG_InitStruct fields to default values */
143   RNG_InitStruct->ClockErrorDetection = LL_RNG_CED_ENABLE;
144 
145 }
146 /**
147   * @}
148   */
149 
150 /**
151   * @}
152   */
153 
154 /**
155   * @}
156   */
157 
158 #endif /* RNG */
159 
160 /**
161   * @}
162   */
163 
164 #endif /* USE_FULL_LL_DRIVER */
165 
166