lib/main/STM32G4/Drivers/STM32G4xx_HAL_Driver/Src/stm32g4xx_ll_rng.c

   1 /**
   2   ******************************************************************************
   3   * @file    stm32g4xx_ll_rng.c
   4   * @author  MCD Application Team
   5   * @brief   RNG LL module driver.
   6   ******************************************************************************
   7   * @attention
   8   *
   9   * <h2><center>&copy; Copyright (c) 2018 STMicroelectronics.
  10   * All rights reserved.</center></h2>
  11   *
  12   * This software component is licensed by ST under BSD 3-Clause license,
  13   * the "License"; You may not use this file except in compliance with the
  14   * License. You may obtain a copy of the License at:
  15   *                        opensource.org/licenses/BSD-3-Clause
  16   *
  17   ******************************************************************************
  18   */
  19 #if defined(USE_FULL_LL_DRIVER)
  20
  21 /* Includes ------------------------------------------------------------------*/
  22 #include "stm32g4xx_ll_rng.h"
  23 #include "stm32g4xx_ll_bus.h"
  24
  25 #ifdef  USE_FULL_ASSERT
  26 #include "stm32_assert.h"
  27 #else
  28 #define assert_param(expr) ((void)0U)
  29 #endif
  30
  31 /** @addtogroup STM32G4xx_LL_Driver
  32   * @{
  33   */
  34
  35 #if defined (RNG)
  36
  37 /** @addtogroup RNG_LL
  38   * @{
  39   */
  40
  41 /* Private types -------------------------------------------------------------*/
  42 /* Private variables ---------------------------------------------------------*/
  43 /* Private constants ---------------------------------------------------------*/
  44 /* Private macros ------------------------------------------------------------*/
  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 /**
  52   * @}
  53   */
  54 /* Private function prototypes -----------------------------------------------*/
  55
  56 /* Exported functions --------------------------------------------------------*/
  57 /** @addtogroup RNG_LL_Exported_Functions
  58   * @{
  59   */
  60
  61 /** @addtogroup RNG_LL_EF_Init
  62   * @{
  63   */
  64
  65 /**
  66   * @brief  De-initialize RNG registers (Registers restored to their default values).
  67   * @param  RNGx RNG Instance
  68   * @retval An ErrorStatus enumeration value:
  69   *          - SUCCESS: RNG registers are de-initialized
  70   *          - ERROR: not applicable
  71   */
  72 ErrorStatus LL_RNG_DeInit(RNG_TypeDef *RNGx)
  73 {
  74   /* Check the parameters */
  75   assert_param(IS_RNG_ALL_INSTANCE(RNGx));
  76   /* Enable RNG reset state */
  77   LL_AHB2_GRP1_ForceReset(LL_AHB2_GRP1_PERIPH_RNG);
  78
  79   /* Release RNG from reset state */
  80   LL_AHB2_GRP1_ReleaseReset(LL_AHB2_GRP1_PERIPH_RNG);
  81   return (SUCCESS);
  82 }
  83
  84 /**
  85   * @brief  Initialize RNG registers according to the specified parameters in RNG_InitStruct.
  86   * @param  RNGx RNG Instance
  87   * @param  RNG_InitStruct pointer to a LL_RNG_InitTypeDef structure
  88   *         that contains the configuration information for the specified RNG peripheral.
  89   * @retval An ErrorStatus enumeration value:
  90   *          - SUCCESS: RNG registers are initialized according to RNG_InitStruct content
  91   *          - ERROR: not applicable
  92   */
  93 ErrorStatus LL_RNG_Init(RNG_TypeDef *RNGx, LL_RNG_InitTypeDef *RNG_InitStruct)
  94 {
  95   /* Check the parameters */
  96   assert_param(IS_RNG_ALL_INSTANCE(RNGx));
  97   assert_param(IS_LL_RNG_CED(RNG_InitStruct->ClockErrorDetection));
  98
  99   /* Clock Error Detection configuration */
 100   MODIFY_REG(RNGx->CR, RNG_CR_CED, RNG_InitStruct->ClockErrorDetection);
 101
 102   return (SUCCESS);
 103 }
 104
 105 /**
 106   * @brief Set each @ref LL_RNG_InitTypeDef field to default value.
 107   * @param RNG_InitStruct pointer to a @ref LL_RNG_InitTypeDef structure
 108   *                       whose fields will be set to default values.
 109   * @retval None
 110   */
 111 void LL_RNG_StructInit(LL_RNG_InitTypeDef *RNG_InitStruct)
 112 {
 113   /* Set RNG_InitStruct fields to default values */
 114   RNG_InitStruct->ClockErrorDetection = LL_RNG_CED_ENABLE;
 115
 116 }
 117 /**
 118   * @}
 119   */
 120
 121 /**
 122   * @}
 123   */
 124
 125 /**
 126   * @}
 127   */
 128
 129 #endif /* RNG */
 130
 131 /**
 132   * @}
 133   */
 134
 135 #endif /* USE_FULL_LL_DRIVER */
 136
 137 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
 138