1 /**
2   ******************************************************************************
3   * @file    stm32l5xx_ll_rng.c
4   * @author  MCD Application Team
5   * @brief   RNG LL module driver.
6   ******************************************************************************
7   * @attention
8   *
9   * Copyright (c) 2019 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 "stm32l5xx_ll_rng.h"
22 #include "stm32l5xx_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 STM32L5xx_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 #define IS_LL_RNG_CLOCK_DIVIDER(__CLOCK_DIV__) ((__CLOCK_DIV__) <=0x0Fu)
51 
52 
53 #define IS_LL_RNG_NIST_COMPLIANCE(__NIST_COMPLIANCE__) (((__NIST_COMPLIANCE__) == LL_RNG_NIST_COMPLIANT) || \
54                                                         ((__NIST_COMPLIANCE__) == LL_RNG_NOTNIST_COMPLIANT))
55 
56 #define IS_LL_RNG_CONFIG1 (__CONFIG1__) ((__CONFIG1__) <= 0x3FUL)
57 
58 #define IS_LL_RNG_CONFIG2 (__CONFIG2__) ((__CONFIG2__) <= 0x07UL)
59 
60 #define IS_LL_RNG_CONFIG3 (__CONFIG3__) ((__CONFIG3__) <= 0xFUL)
61 /**
62   * @}
63   */
64 /* Private function prototypes -----------------------------------------------*/
65 
66 /* Exported functions --------------------------------------------------------*/
67 /** @addtogroup RNG_LL_Exported_Functions
68   * @{
69   */
70 
71 /** @addtogroup RNG_LL_EF_Init
72   * @{
73   */
74 
75 /**
76   * @brief  De-initialize RNG registers (Registers restored to their default values).
77   * @param  RNGx RNG Instance
78   * @retval An ErrorStatus enumeration value:
79   *          - SUCCESS: RNG registers are de-initialized
80   *          - ERROR: not applicable
81   */
LL_RNG_DeInit(RNG_TypeDef * RNGx)82 ErrorStatus LL_RNG_DeInit(RNG_TypeDef *RNGx)
83 {
84   ErrorStatus status = SUCCESS;
85 
86   /* Check the parameters */
87   assert_param(IS_RNG_ALL_INSTANCE(RNGx));
88   if (RNGx == RNG)
89   {
90     /* Enable RNG reset state */
91     LL_AHB2_GRP1_ForceReset(LL_AHB2_GRP1_PERIPH_RNG);
92 
93     /* Release RNG from reset state */
94     LL_AHB2_GRP1_ReleaseReset(LL_AHB2_GRP1_PERIPH_RNG);
95   }
96   else
97   {
98     status = ERROR;
99   }
100 
101   return status;
102 }
103 
104 /**
105   * @brief  Initialize RNG registers according to the specified parameters in RNG_InitStruct.
106   * @param  RNGx RNG Instance
107   * @param  RNG_InitStruct pointer to a LL_RNG_InitTypeDef structure
108   *         that contains the configuration information for the specified RNG peripheral.
109   * @retval An ErrorStatus enumeration value:
110   *          - SUCCESS: RNG registers are initialized according to RNG_InitStruct content
111   *          - ERROR: not applicable
112   */
LL_RNG_Init(RNG_TypeDef * RNGx,LL_RNG_InitTypeDef * RNG_InitStruct)113 ErrorStatus LL_RNG_Init(RNG_TypeDef *RNGx, LL_RNG_InitTypeDef *RNG_InitStruct)
114 {
115   /* Check the parameters */
116   assert_param(IS_RNG_ALL_INSTANCE(RNGx));
117   assert_param(IS_LL_RNG_CED(RNG_InitStruct->ClockErrorDetection));
118 
119   /* Clock Error Detection Configuration when CONDRT bit is set to 1 */
120   MODIFY_REG(RNGx->CR, RNG_CR_CED | RNG_CR_CONDRST, RNG_InitStruct->ClockErrorDetection | RNG_CR_CONDRST);
121   /* Writing bits CONDRST=0*/
122   CLEAR_BIT(RNGx->CR, RNG_CR_CONDRST);
123 
124   return (SUCCESS);
125 }
126 
127 /**
128   * @brief Set each @ref LL_RNG_InitTypeDef field to default value.
129   * @param RNG_InitStruct pointer to a @ref LL_RNG_InitTypeDef structure
130   *                       whose fields will be set to default values.
131   * @retval None
132   */
LL_RNG_StructInit(LL_RNG_InitTypeDef * RNG_InitStruct)133 void LL_RNG_StructInit(LL_RNG_InitTypeDef *RNG_InitStruct)
134 {
135   /* Set RNG_InitStruct fields to default values */
136   RNG_InitStruct->ClockErrorDetection = LL_RNG_CED_ENABLE;
137 
138 }
139 /**
140   * @}
141   */
142 
143 /**
144   * @}
145   */
146 
147 /**
148   * @}
149   */
150 
151 #endif /* RNG */
152 
153 /**
154   * @}
155   */
156 
157 #endif /* USE_FULL_LL_DRIVER */
158 
159