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annotate Common/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_rng.c @ 902:d4622533271d Evo_2_23

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VPM table mode: Because of the model maths, usage of float data type and so on it may happen that the TTS decreases during ascent and continues calculation of the vpm. To keep the values stable the vpm table mode has been introduces. Instead of continously calculation of the stops the stop time is decreased if the diver is close to a deco stop. If the table is violated (e.g. by not doing gas change) the table will be updated to the new, longer runtime. The table will not be switch back to a shorter version in case e.g. the missed gas change is performed
author Ideenmodellierer
date Wed, 02 Oct 2024 22:18:19 +0200
parents c78bcbd5deda
children
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128
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1 /**
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2 ******************************************************************************
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3 * @file stm32f4xx_hal_rng.c
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4 * @author MCD Application Team
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5 * @brief RNG HAL module driver.
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6 * This file provides firmware functions to manage the following
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7 * functionalities of the Random Number Generator (RNG) peripheral:
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8 * + Initialization/de-initialization functions
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9 * + Peripheral Control functions
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10 * + Peripheral State functions
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11 *
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12 @verbatim
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13 ==============================================================================
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14 ##### How to use this driver #####
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15 ==============================================================================
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16 [..]
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17 The RNG HAL driver can be used as follows:
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18
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19 (#) Enable the RNG controller clock using __HAL_RCC_RNG_CLK_ENABLE() macro
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20 in HAL_RNG_MspInit().
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21 (#) Activate the RNG peripheral using HAL_RNG_Init() function.
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22 (#) Wait until the 32 bit Random Number Generator contains a valid
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23 random data using (polling/interrupt) mode.
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24 (#) Get the 32 bit random number using HAL_RNG_GenerateRandomNumber() function.
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25
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26 @endverbatim
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27 ******************************************************************************
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28 * @attention
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29 *
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30 * <h2><center>&copy; COPYRIGHT(c) 2017 STMicroelectronics</center></h2>
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31 *
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32 * Redistribution and use in source and binary forms, with or without modification,
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33 * are permitted provided that the following conditions are met:
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34 * 1. Redistributions of source code must retain the above copyright notice,
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35 * this list of conditions and the following disclaimer.
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36 * 2. Redistributions in binary form must reproduce the above copyright notice,
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37 * this list of conditions and the following disclaimer in the documentation
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38 * and/or other materials provided with the distribution.
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39 * 3. Neither the name of STMicroelectronics nor the names of its contributors
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40 * may be used to endorse or promote products derived from this software
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41 * without specific prior written permission.
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42 *
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43 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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44 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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45 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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46 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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47 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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48 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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49 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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50 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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51 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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52 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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53 *
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54 ******************************************************************************
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55 */
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56
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57 /* Includes ------------------------------------------------------------------*/
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58 #include "stm32f4xx_hal.h"
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59
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60 /** @addtogroup STM32F4xx_HAL_Driver
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61 * @{
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62 */
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63
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64 /** @addtogroup RNG
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65 * @{
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66 */
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67
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68 #ifdef HAL_RNG_MODULE_ENABLED
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69
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70 #if defined(STM32F405xx) || defined(STM32F415xx) || defined(STM32F407xx) || defined(STM32F417xx) ||\
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71 defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx) ||\
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72 defined(STM32F410Tx) || defined(STM32F410Cx) || defined(STM32F410Rx) || defined(STM32F469xx) ||\
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73 defined(STM32F479xx) || defined(STM32F412Zx) || defined(STM32F412Vx) || defined(STM32F412Rx) ||\
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74 defined(STM32F412Cx) || defined(STM32F413xx) || defined(STM32F423xx)
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75
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76
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77 /* Private types -------------------------------------------------------------*/
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78 /* Private defines -----------------------------------------------------------*/
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79 /* Private variables ---------------------------------------------------------*/
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80 /* Private constants ---------------------------------------------------------*/
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81 /** @addtogroup RNG_Private_Constants
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82 * @{
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83 */
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84 #define RNG_TIMEOUT_VALUE 2U
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85 /**
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86 * @}
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87 */
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88 /* Private macros ------------------------------------------------------------*/
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89 /* Private functions prototypes ----------------------------------------------*/
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90 /* Private functions ---------------------------------------------------------*/
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91 /* Exported functions --------------------------------------------------------*/
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92
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93 /** @addtogroup RNG_Exported_Functions
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94 * @{
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95 */
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96
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97 /** @addtogroup RNG_Exported_Functions_Group1
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98 * @brief Initialization and de-initialization functions
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99 *
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100 @verbatim
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101 ===============================================================================
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102 ##### Initialization and de-initialization functions #####
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103 ===============================================================================
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104 [..] This section provides functions allowing to:
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105 (+) Initialize the RNG according to the specified parameters
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106 in the RNG_InitTypeDef and create the associated handle
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107 (+) DeInitialize the RNG peripheral
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108 (+) Initialize the RNG MSP
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109 (+) DeInitialize RNG MSP
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110
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111 @endverbatim
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112 * @{
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113 */
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114
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115 /**
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116 * @brief Initializes the RNG peripheral and creates the associated handle.
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117 * @param hrng pointer to a RNG_HandleTypeDef structure that contains
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118 * the configuration information for RNG.
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119 * @retval HAL status
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120 */
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121 HAL_StatusTypeDef HAL_RNG_Init(RNG_HandleTypeDef *hrng)
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122 {
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123 /* Check the RNG handle allocation */
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124 if(hrng == NULL)
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125 {
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126 return HAL_ERROR;
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127 }
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128
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129 if(hrng->State == HAL_RNG_STATE_RESET)
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130 {
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131 /* Allocate lock resource and initialize it */
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132 hrng->Lock = HAL_UNLOCKED;
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133 /* Init the low level hardware */
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134 HAL_RNG_MspInit(hrng);
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135 }
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136
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137 /* Change RNG peripheral state */
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138 hrng->State = HAL_RNG_STATE_BUSY;
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139
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140 /* Enable the RNG Peripheral */
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141 __HAL_RNG_ENABLE(hrng);
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142
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143 /* Initialize the RNG state */
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144 hrng->State = HAL_RNG_STATE_READY;
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145
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146 /* Return function status */
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147 return HAL_OK;
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148 }
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149
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150 /**
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151 * @brief DeInitializes the RNG peripheral.
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152 * @param hrng pointer to a RNG_HandleTypeDef structure that contains
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153 * the configuration information for RNG.
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154 * @retval HAL status
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155 */
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156 HAL_StatusTypeDef HAL_RNG_DeInit(RNG_HandleTypeDef *hrng)
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157 {
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158 /* Check the RNG handle allocation */
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159 if(hrng == NULL)
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160 {
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161 return HAL_ERROR;
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162 }
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163 /* Disable the RNG Peripheral */
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164 CLEAR_BIT(hrng->Instance->CR, RNG_CR_IE | RNG_CR_RNGEN);
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165
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166 /* Clear RNG interrupt status flags */
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167 CLEAR_BIT(hrng->Instance->SR, RNG_SR_CEIS | RNG_SR_SEIS);
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168
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169 /* DeInit the low level hardware */
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170 HAL_RNG_MspDeInit(hrng);
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171
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172 /* Update the RNG state */
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173 hrng->State = HAL_RNG_STATE_RESET;
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174
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175 /* Release Lock */
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176 __HAL_UNLOCK(hrng);
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177
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178 /* Return the function status */
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179 return HAL_OK;
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180 }
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181
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182 /**
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183 * @brief Initializes the RNG MSP.
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184 * @param hrng pointer to a RNG_HandleTypeDef structure that contains
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185 * the configuration information for RNG.
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186 * @retval None
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187 */
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188 __weak void HAL_RNG_MspInit(RNG_HandleTypeDef *hrng)
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189 {
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190 /* Prevent unused argument(s) compilation warning */
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191 UNUSED(hrng);
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192 /* NOTE : This function should not be modified. When the callback is needed,
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193 function HAL_RNG_MspInit must be implemented in the user file.
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194 */
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195 }
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196
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197 /**
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198 * @brief DeInitializes the RNG MSP.
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199 * @param hrng pointer to a RNG_HandleTypeDef structure that contains
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200 * the configuration information for RNG.
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201 * @retval None
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202 */
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203 __weak void HAL_RNG_MspDeInit(RNG_HandleTypeDef *hrng)
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204 {
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205 /* Prevent unused argument(s) compilation warning */
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206 UNUSED(hrng);
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207 /* NOTE : This function should not be modified. When the callback is needed,
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208 function HAL_RNG_MspDeInit must be implemented in the user file.
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209 */
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210 }
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211
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212 /**
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213 * @}
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214 */
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215
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216 /** @addtogroup RNG_Exported_Functions_Group2
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217 * @brief Peripheral Control functions
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218 *
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219 @verbatim
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220 ===============================================================================
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221 ##### Peripheral Control functions #####
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222 ===============================================================================
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223 [..] This section provides functions allowing to:
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224 (+) Get the 32 bit Random number
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225 (+) Get the 32 bit Random number with interrupt enabled
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226 (+) Handle RNG interrupt request
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227
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228 @endverbatim
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229 * @{
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230 */
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231
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232 /**
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233 * @brief Generates a 32-bit random number.
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234 * @note Each time the random number data is read the RNG_FLAG_DRDY flag
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235 * is automatically cleared.
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236 * @param hrng pointer to a RNG_HandleTypeDef structure that contains
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237 * the configuration information for RNG.
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238 * @param random32bit pointer to generated random number variable if successful.
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239 * @retval HAL status
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240 */
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241
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242 HAL_StatusTypeDef HAL_RNG_GenerateRandomNumber(RNG_HandleTypeDef *hrng, uint32_t *random32bit)
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243 {
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244 uint32_t tickstart = 0U;
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245 HAL_StatusTypeDef status = HAL_OK;
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246
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247 /* Process Locked */
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248 __HAL_LOCK(hrng);
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249
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250 /* Check RNG peripheral state */
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251 if(hrng->State == HAL_RNG_STATE_READY)
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252 {
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253 /* Change RNG peripheral state */
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254 hrng->State = HAL_RNG_STATE_BUSY;
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255
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256 /* Get tick */
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257 tickstart = HAL_GetTick();
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258
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259 /* Check if data register contains valid random data */
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260 while(__HAL_RNG_GET_FLAG(hrng, RNG_FLAG_DRDY) == RESET)
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261 {
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262 if((HAL_GetTick() - tickstart ) > RNG_TIMEOUT_VALUE)
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263 {
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264 hrng->State = HAL_RNG_STATE_ERROR;
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265
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266 /* Process Unlocked */
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267 __HAL_UNLOCK(hrng);
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268
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269 return HAL_TIMEOUT;
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270 }
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271 }
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272
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273 /* Get a 32bit Random number */
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274 hrng->RandomNumber = hrng->Instance->DR;
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275 *random32bit = hrng->RandomNumber;
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276
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277 hrng->State = HAL_RNG_STATE_READY;
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278 }
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279 else
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280 {
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281 status = HAL_ERROR;
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282 }
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283
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284 /* Process Unlocked */
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285 __HAL_UNLOCK(hrng);
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286
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287 return status;
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288 }
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289
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290 /**
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291 * @brief Generates a 32-bit random number in interrupt mode.
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292 * @param hrng pointer to a RNG_HandleTypeDef structure that contains
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293 * the configuration information for RNG.
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294 * @retval HAL status
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295 */
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296 HAL_StatusTypeDef HAL_RNG_GenerateRandomNumber_IT(RNG_HandleTypeDef *hrng)
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297 {
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298 HAL_StatusTypeDef status = HAL_OK;
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299
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300 /* Process Locked */
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301 __HAL_LOCK(hrng);
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302
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303 /* Check RNG peripheral state */
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304 if(hrng->State == HAL_RNG_STATE_READY)
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305 {
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306 /* Change RNG peripheral state */
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307 hrng->State = HAL_RNG_STATE_BUSY;
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308
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309 /* Process Unlocked */
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310 __HAL_UNLOCK(hrng);
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311
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312 /* Enable the RNG Interrupts: Data Ready, Clock error, Seed error */
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313 __HAL_RNG_ENABLE_IT(hrng);
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314 }
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315 else
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316 {
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317 /* Process Unlocked */
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318 __HAL_UNLOCK(hrng);
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319
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320 status = HAL_ERROR;
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321 }
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322
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323 return status;
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324 }
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325
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326 /**
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327 * @brief Handles RNG interrupt request.
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328 * @note In the case of a clock error, the RNG is no more able to generate
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329 * random numbers because the PLL48CLK clock is not correct. User has
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330 * to check that the clock controller is correctly configured to provide
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331 * the RNG clock and clear the CEIS bit using __HAL_RNG_CLEAR_IT().
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332 * The clock error has no impact on the previously generated
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333 * random numbers, and the RNG_DR register contents can be used.
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334 * @note In the case of a seed error, the generation of random numbers is
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335 * interrupted as long as the SECS bit is '1'. If a number is
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336 * available in the RNG_DR register, it must not be used because it may
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337 * not have enough entropy. In this case, it is recommended to clear the
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338 * SEIS bit using __HAL_RNG_CLEAR_IT(), then disable and enable
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339 * the RNG peripheral to reinitialize and restart the RNG.
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340 * @note User-written HAL_RNG_ErrorCallback() API is called once whether SEIS
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341 * or CEIS are set.
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342 * @param hrng pointer to a RNG_HandleTypeDef structure that contains
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343 * the configuration information for RNG.
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344 * @retval None
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345
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346 */
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347 void HAL_RNG_IRQHandler(RNG_HandleTypeDef *hrng)
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348 {
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349 /* RNG clock error interrupt occurred */
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350 if((__HAL_RNG_GET_IT(hrng, RNG_IT_CEI) != RESET) || (__HAL_RNG_GET_IT(hrng, RNG_IT_SEI) != RESET))
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351 {
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352 /* Change RNG peripheral state */
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353 hrng->State = HAL_RNG_STATE_ERROR;
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354
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355 HAL_RNG_ErrorCallback(hrng);
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356
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357 /* Clear the clock error flag */
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358 __HAL_RNG_CLEAR_IT(hrng, RNG_IT_CEI|RNG_IT_SEI);
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359
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360 }
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361
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362 /* Check RNG data ready interrupt occurred */
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363 if(__HAL_RNG_GET_IT(hrng, RNG_IT_DRDY) != RESET)
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364 {
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365 /* Generate random number once, so disable the IT */
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366 __HAL_RNG_DISABLE_IT(hrng);
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367
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368 /* Get the 32bit Random number (DRDY flag automatically cleared) */
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369 hrng->RandomNumber = hrng->Instance->DR;
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370
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371 if(hrng->State != HAL_RNG_STATE_ERROR)
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372 {
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373 /* Change RNG peripheral state */
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374 hrng->State = HAL_RNG_STATE_READY;
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375
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376 /* Data Ready callback */
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377 HAL_RNG_ReadyDataCallback(hrng, hrng->RandomNumber);
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378 }
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379 }
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380 }
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381
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382 /**
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383 * @brief Returns generated random number in polling mode (Obsolete)
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384 * Use HAL_RNG_GenerateRandomNumber() API instead.
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385 * @param hrng pointer to a RNG_HandleTypeDef structure that contains
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386 * the configuration information for RNG.
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387 * @retval Random value
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388 */
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389 uint32_t HAL_RNG_GetRandomNumber(RNG_HandleTypeDef *hrng)
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390 {
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391 if(HAL_RNG_GenerateRandomNumber(hrng, &(hrng->RandomNumber)) == HAL_OK)
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392 {
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393 return hrng->RandomNumber;
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394 }
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395 else
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396 {
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397 return 0U;
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398 }
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399 }
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400
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401 /**
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402 * @brief Returns a 32-bit random number with interrupt enabled (Obsolete),
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403 * Use HAL_RNG_GenerateRandomNumber_IT() API instead.
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404 * @param hrng pointer to a RNG_HandleTypeDef structure that contains
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405 * the configuration information for RNG.
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406 * @retval 32-bit random number
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407 */
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408 uint32_t HAL_RNG_GetRandomNumber_IT(RNG_HandleTypeDef *hrng)
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409 {
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410 uint32_t random32bit = 0U;
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411
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412 /* Process locked */
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413 __HAL_LOCK(hrng);
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414
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415 /* Change RNG peripheral state */
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416 hrng->State = HAL_RNG_STATE_BUSY;
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417
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418 /* Get a 32bit Random number */
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419 random32bit = hrng->Instance->DR;
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420
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421 /* Enable the RNG Interrupts: Data Ready, Clock error, Seed error */
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422 __HAL_RNG_ENABLE_IT(hrng);
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423
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424 /* Return the 32 bit random number */
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425 return random32bit;
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426 }
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427
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428 /**
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429 * @brief Read latest generated random number.
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430 * @param hrng pointer to a RNG_HandleTypeDef structure that contains
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431 * the configuration information for RNG.
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432 * @retval random value
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433 */
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434 uint32_t HAL_RNG_ReadLastRandomNumber(RNG_HandleTypeDef *hrng)
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435 {
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436 return(hrng->RandomNumber);
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437 }
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438
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439 /**
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440 * @brief Data Ready callback in non-blocking mode.
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441 * @param hrng pointer to a RNG_HandleTypeDef structure that contains
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442 * the configuration information for RNG.
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443 * @param random32bit generated random number.
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444 * @retval None
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445 */
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446 __weak void HAL_RNG_ReadyDataCallback(RNG_HandleTypeDef *hrng, uint32_t random32bit)
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447 {
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448 /* Prevent unused argument(s) compilation warning */
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449 UNUSED(hrng);
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450 UNUSED(random32bit);
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451 /* NOTE : This function should not be modified. When the callback is needed,
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452 function HAL_RNG_ReadyDataCallback must be implemented in the user file.
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453 */
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454 }
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455
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456 /**
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457 * @brief RNG error callbacks.
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458 * @param hrng pointer to a RNG_HandleTypeDef structure that contains
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459 * the configuration information for RNG.
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460 * @retval None
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461 */
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462 __weak void HAL_RNG_ErrorCallback(RNG_HandleTypeDef *hrng)
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463 {
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464 /* Prevent unused argument(s) compilation warning */
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465 UNUSED(hrng);
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466 /* NOTE : This function should not be modified. When the callback is needed,
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467 function HAL_RNG_ErrorCallback must be implemented in the user file.
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468 */
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469 }
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470 /**
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471 * @}
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472 */
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473
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474
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475 /** @addtogroup RNG_Exported_Functions_Group3
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476 * @brief Peripheral State functions
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477 *
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478 @verbatim
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479 ===============================================================================
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480 ##### Peripheral State functions #####
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481 ===============================================================================
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482 [..]
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483 This subsection permits to get in run-time the status of the peripheral
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484 and the data flow.
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485
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486 @endverbatim
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487 * @{
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488 */
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489
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490 /**
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491 * @brief Returns the RNG state.
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492 * @param hrng pointer to a RNG_HandleTypeDef structure that contains
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493 * the configuration information for RNG.
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494 * @retval HAL state
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495 */
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496 HAL_RNG_StateTypeDef HAL_RNG_GetState(RNG_HandleTypeDef *hrng)
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497 {
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498 return hrng->State;
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499 }
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500
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501 /**
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502 * @}
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503 */
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504
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505 /**
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506 * @}
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507 */
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508
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509 #endif /* STM32F405xx || STM32F415xx || STM32F407xx || STM32F417xx || STM32F427xx || STM32F437xx ||\
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510 STM32F429xx || STM32F439xx || STM32F410xx || STM32F469xx || STM32F479xx || STM32F412Zx ||\
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511 STM32F412Vx || STM32F412Rx || STM32F412Cx || STM32F413xx || STM32F423xx */
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512
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513 #endif /* HAL_RNG_MODULE_ENABLED */
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514
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515 /**
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516 * @}
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517 */
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518
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519 /**
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520 * @}
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521 */
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522
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523 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/