1 /**
2   ******************************************************************************
3   * @file    stm32l4xx_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 "stm32l4xx_ll_rng.h"
22 #include "stm32l4xx_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
29 
30 /** @addtogroup STM32L4xx_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 #if defined(RNG_CR_CED)
45 /** @addtogroup RNG_LL_Private_Macros
46   * @{
47   */
48 #define IS_LL_RNG_CED(__MODE__) (((__MODE__) == LL_RNG_CED_ENABLE) || \
49                                  ((__MODE__) == LL_RNG_CED_DISABLE))
50 
51 #if defined(RNG_CR_CONDRST)
52 #define IS_LL_RNG_CLOCK_DIVIDER(__CLOCK_DIV__) ((__CLOCK_DIV__) <=0x0Fu)
53 
54 
55 #define IS_LL_RNG_NIST_COMPLIANCE(__NIST_COMPLIANCE__) (((__NIST_COMPLIANCE__) == LL_RNG_NIST_COMPLIANT) || \
56                                                      ((__NIST_COMPLIANCE__) == LL_RNG_NOTNIST_COMPLIANT))
57 
58 #define IS_LL_RNG_CONFIG1 (__CONFIG1__) ((__CONFIG1__) <= 0x3FUL)
59 
60 #define IS_LL_RNG_CONFIG2 (__CONFIG2__) ((__CONFIG2__) <= 0x07UL)
61 
62 #define IS_LL_RNG_CONFIG3 (__CONFIG3__) ((__CONFIG3__) <= 0xFUL)
63 #endif /* end of RNG_CR_CONDRST*/
64 /**
65   * @}
66   */
67 #endif
68 /* Private function prototypes -----------------------------------------------*/
69 
70 /* Exported functions --------------------------------------------------------*/
71 /** @addtogroup RNG_LL_Exported_Functions
72   * @{
73   */
74 
75 /** @addtogroup RNG_LL_EF_Init
76   * @{
77   */
78 
79 /**
80   * @brief  De-initialize RNG registers (Registers restored to their default values).
81   * @param  RNGx RNG Instance
82   * @retval An ErrorStatus enumeration value:
83   *          - SUCCESS: RNG registers are de-initialized
84   *          - ERROR: not applicable
85   */
LL_RNG_DeInit(RNG_TypeDef * RNGx)86 ErrorStatus LL_RNG_DeInit(RNG_TypeDef *RNGx)
87 {
88   /* Check the parameters */
89   assert_param(IS_RNG_ALL_INSTANCE(RNGx));
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   return (SUCCESS);
96 }
97 
98 #if defined(RNG_CR_CED)
99 /**
100   * @brief  Initialize RNG registers according to the specified parameters in RNG_InitStruct.
101   * @param  RNGx RNG Instance
102   * @param  RNG_InitStruct pointer to a LL_RNG_InitTypeDef structure
103   *         that contains the configuration information for the specified RNG peripheral.
104   * @retval An ErrorStatus enumeration value:
105   *          - SUCCESS: RNG registers are initialized according to RNG_InitStruct content
106   *          - ERROR: not applicable
107   */
LL_RNG_Init(RNG_TypeDef * RNGx,LL_RNG_InitTypeDef * RNG_InitStruct)108 ErrorStatus LL_RNG_Init(RNG_TypeDef *RNGx, LL_RNG_InitTypeDef *RNG_InitStruct)
109 {
110   /* Check the parameters */
111   assert_param(IS_RNG_ALL_INSTANCE(RNGx));
112   assert_param(IS_LL_RNG_CED(RNG_InitStruct->ClockErrorDetection));
113 
114 #if defined(RNG_CR_CONDRST)
115   /* Clock Error Detection Configuration when CONDRT bit is set to 1 */
116   MODIFY_REG(RNGx->CR, RNG_CR_CED | RNG_CR_CONDRST, RNG_InitStruct->ClockErrorDetection | RNG_CR_CONDRST);
117   /* Writing bits CONDRST=0*/
118   CLEAR_BIT(RNGx->CR, RNG_CR_CONDRST);
119 #else
120   /* Clock Error Detection configuration */
121   MODIFY_REG(RNGx->CR, RNG_CR_CED, RNG_InitStruct->ClockErrorDetection);
122 #endif
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 #endif
140 /**
141   * @}
142   */
143 
144 /**
145   * @}
146   */
147 
148 /**
149   * @}
150   */
151 
152 #endif /* RNG */
153 
154 /**
155   * @}
156   */
157 
158 #endif /* USE_FULL_LL_DRIVER */
159