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mbed library sources. Supersedes mbed-src.

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targets/TARGET_STM/TARGET_STM32F2/device/stm32f2xx_hal_rng.c@189:f392fc9709a3, 2019-02-20 (annotated)

Committer:
AnnaBridge
Date:
Wed Feb 20 22:31:08 2019 +0000
Revision:
189:f392fc9709a3
Parent:
167:e84263d55307 
mbed library release version 165

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /**
<> 144:ef7eb2e8f9f7 2 ******************************************************************************
<> 144:ef7eb2e8f9f7 3 * @file stm32f2xx_hal_rng.c
<> 144:ef7eb2e8f9f7 4 * @author MCD Application Team
AnnaBridge 167:e84263d55307 5 * @version V1.2.1
AnnaBridge 167:e84263d55307 6 * @date 14-April-2017
<> 144:ef7eb2e8f9f7 7 * @brief RNG HAL module driver.
<> 144:ef7eb2e8f9f7 8 * This file provides firmware functions to manage the following
<> 144:ef7eb2e8f9f7 9 * functionalities of the Random Number Generator (RNG) peripheral:
<> 144:ef7eb2e8f9f7 10 * + Initialization/de-initialization functions
<> 144:ef7eb2e8f9f7 11 * + Peripheral Control functions
<> 144:ef7eb2e8f9f7 12 * + Peripheral State functions
<> 144:ef7eb2e8f9f7 13 *
<> 144:ef7eb2e8f9f7 14 @verbatim
<> 144:ef7eb2e8f9f7 15 ==============================================================================
<> 144:ef7eb2e8f9f7 16 ##### How to use this driver #####
<> 144:ef7eb2e8f9f7 17 ==============================================================================
<> 144:ef7eb2e8f9f7 18 [..]
<> 144:ef7eb2e8f9f7 19 The RNG HAL driver can be used as follows:
<> 144:ef7eb2e8f9f7 20
<> 144:ef7eb2e8f9f7 21 (#) Enable the RNG controller clock using __HAL_RCC_RNG_CLK_ENABLE() macro
<> 144:ef7eb2e8f9f7 22 in HAL_RNG_MspInit().
<> 144:ef7eb2e8f9f7 23 (#) Activate the RNG peripheral using HAL_RNG_Init() function.
<> 144:ef7eb2e8f9f7 24 (#) Wait until the 32 bit Random Number Generator contains a valid
<> 144:ef7eb2e8f9f7 25 random data using (polling/interrupt) mode.
<> 144:ef7eb2e8f9f7 26 (#) Get the 32 bit random number using HAL_RNG_GenerateRandomNumber() function.
<> 144:ef7eb2e8f9f7 27
<> 144:ef7eb2e8f9f7 28 @endverbatim
<> 144:ef7eb2e8f9f7 29 ******************************************************************************
<> 144:ef7eb2e8f9f7 30 * @attention
<> 144:ef7eb2e8f9f7 31 *
AnnaBridge 167:e84263d55307 32 * <h2><center>&copy; COPYRIGHT(c) 2017 STMicroelectronics</center></h2>
<> 144:ef7eb2e8f9f7 33 *
<> 144:ef7eb2e8f9f7 34 * Redistribution and use in source and binary forms, with or without modification,
<> 144:ef7eb2e8f9f7 35 * are permitted provided that the following conditions are met:
<> 144:ef7eb2e8f9f7 36 * 1. Redistributions of source code must retain the above copyright notice,
<> 144:ef7eb2e8f9f7 37 * this list of conditions and the following disclaimer.
<> 144:ef7eb2e8f9f7 38 * 2. Redistributions in binary form must reproduce the above copyright notice,
<> 144:ef7eb2e8f9f7 39 * this list of conditions and the following disclaimer in the documentation
<> 144:ef7eb2e8f9f7 40 * and/or other materials provided with the distribution.
<> 144:ef7eb2e8f9f7 41 * 3. Neither the name of STMicroelectronics nor the names of its contributors
<> 144:ef7eb2e8f9f7 42 * may be used to endorse or promote products derived from this software
<> 144:ef7eb2e8f9f7 43 * without specific prior written permission.
<> 144:ef7eb2e8f9f7 44 *
<> 144:ef7eb2e8f9f7 45 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
<> 144:ef7eb2e8f9f7 46 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
<> 144:ef7eb2e8f9f7 47 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
<> 144:ef7eb2e8f9f7 48 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
<> 144:ef7eb2e8f9f7 49 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
<> 144:ef7eb2e8f9f7 50 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
<> 144:ef7eb2e8f9f7 51 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
<> 144:ef7eb2e8f9f7 52 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
<> 144:ef7eb2e8f9f7 53 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
<> 144:ef7eb2e8f9f7 54 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
<> 144:ef7eb2e8f9f7 55 *
<> 144:ef7eb2e8f9f7 56 ******************************************************************************
<> 144:ef7eb2e8f9f7 57 */
<> 144:ef7eb2e8f9f7 58
<> 144:ef7eb2e8f9f7 59 /* Includes ------------------------------------------------------------------*/
<> 144:ef7eb2e8f9f7 60 #include "stm32f2xx_hal.h"
<> 144:ef7eb2e8f9f7 61
<> 144:ef7eb2e8f9f7 62 /** @addtogroup STM32F2xx_HAL_Driver
<> 144:ef7eb2e8f9f7 63 * @{
<> 144:ef7eb2e8f9f7 64 */
<> 144:ef7eb2e8f9f7 65
<> 144:ef7eb2e8f9f7 66 /** @addtogroup RNG
<> 144:ef7eb2e8f9f7 67 * @{
<> 144:ef7eb2e8f9f7 68 */
<> 144:ef7eb2e8f9f7 69
<> 144:ef7eb2e8f9f7 70 #ifdef HAL_RNG_MODULE_ENABLED
<> 144:ef7eb2e8f9f7 71
<> 144:ef7eb2e8f9f7 72
<> 144:ef7eb2e8f9f7 73 /* Private types -------------------------------------------------------------*/
<> 144:ef7eb2e8f9f7 74 /* Private defines -----------------------------------------------------------*/
<> 144:ef7eb2e8f9f7 75 /* Private variables ---------------------------------------------------------*/
<> 144:ef7eb2e8f9f7 76 /* Private constants ---------------------------------------------------------*/
<> 144:ef7eb2e8f9f7 77 /** @addtogroup RNG_Private_Constants
<> 144:ef7eb2e8f9f7 78 * @{
<> 144:ef7eb2e8f9f7 79 */
<> 144:ef7eb2e8f9f7 80 #define RNG_TIMEOUT_VALUE 2U
<> 144:ef7eb2e8f9f7 81 /**
<> 144:ef7eb2e8f9f7 82 * @}
<> 144:ef7eb2e8f9f7 83 */
<> 144:ef7eb2e8f9f7 84 /* Private macros ------------------------------------------------------------*/
<> 144:ef7eb2e8f9f7 85 /* Private functions prototypes ----------------------------------------------*/
<> 144:ef7eb2e8f9f7 86 /* Private functions ---------------------------------------------------------*/
<> 144:ef7eb2e8f9f7 87 /* Exported functions --------------------------------------------------------*/
<> 144:ef7eb2e8f9f7 88
<> 144:ef7eb2e8f9f7 89 /** @addtogroup RNG_Exported_Functions
<> 144:ef7eb2e8f9f7 90 * @{
<> 144:ef7eb2e8f9f7 91 */
<> 144:ef7eb2e8f9f7 92
<> 144:ef7eb2e8f9f7 93 /** @addtogroup RNG_Exported_Functions_Group1
<> 144:ef7eb2e8f9f7 94 * @brief Initialization and de-initialization functions
<> 144:ef7eb2e8f9f7 95 *
<> 144:ef7eb2e8f9f7 96 @verbatim
<> 144:ef7eb2e8f9f7 97 ===============================================================================
<> 144:ef7eb2e8f9f7 98 ##### Initialization and de-initialization functions #####
<> 144:ef7eb2e8f9f7 99 ===============================================================================
<> 144:ef7eb2e8f9f7 100 [..] This section provides functions allowing to:
<> 144:ef7eb2e8f9f7 101 (+) Initialize the RNG according to the specified parameters
<> 144:ef7eb2e8f9f7 102 in the RNG_InitTypeDef and create the associated handle
<> 144:ef7eb2e8f9f7 103 (+) DeInitialize the RNG peripheral
<> 144:ef7eb2e8f9f7 104 (+) Initialize the RNG MSP
<> 144:ef7eb2e8f9f7 105 (+) DeInitialize RNG MSP
<> 144:ef7eb2e8f9f7 106
<> 144:ef7eb2e8f9f7 107 @endverbatim
<> 144:ef7eb2e8f9f7 108 * @{
<> 144:ef7eb2e8f9f7 109 */
<> 144:ef7eb2e8f9f7 110
<> 144:ef7eb2e8f9f7 111 /**
<> 144:ef7eb2e8f9f7 112 * @brief Initializes the RNG peripheral and creates the associated handle.
<> 144:ef7eb2e8f9f7 113 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
<> 144:ef7eb2e8f9f7 114 * the configuration information for RNG.
<> 144:ef7eb2e8f9f7 115 * @retval HAL status
<> 144:ef7eb2e8f9f7 116 */
<> 144:ef7eb2e8f9f7 117 HAL_StatusTypeDef HAL_RNG_Init(RNG_HandleTypeDef *hrng)
<> 144:ef7eb2e8f9f7 118 {
<> 144:ef7eb2e8f9f7 119 /* Check the RNG handle allocation */
<> 144:ef7eb2e8f9f7 120 if(hrng == NULL)
<> 144:ef7eb2e8f9f7 121 {
<> 144:ef7eb2e8f9f7 122 return HAL_ERROR;
<> 144:ef7eb2e8f9f7 123 }
<> 144:ef7eb2e8f9f7 124
<> 144:ef7eb2e8f9f7 125 __HAL_LOCK(hrng);
<> 144:ef7eb2e8f9f7 126
<> 144:ef7eb2e8f9f7 127 if(hrng->State == HAL_RNG_STATE_RESET)
<> 144:ef7eb2e8f9f7 128 {
<> 144:ef7eb2e8f9f7 129 /* Allocate lock resource and initialize it */
<> 144:ef7eb2e8f9f7 130 hrng->Lock = HAL_UNLOCKED;
<> 144:ef7eb2e8f9f7 131 /* Init the low level hardware */
<> 144:ef7eb2e8f9f7 132 HAL_RNG_MspInit(hrng);
<> 144:ef7eb2e8f9f7 133 }
<> 144:ef7eb2e8f9f7 134
<> 144:ef7eb2e8f9f7 135 /* Change RNG peripheral state */
<> 144:ef7eb2e8f9f7 136 hrng->State = HAL_RNG_STATE_BUSY;
<> 144:ef7eb2e8f9f7 137
<> 144:ef7eb2e8f9f7 138 /* Enable the RNG Peripheral */
<> 144:ef7eb2e8f9f7 139 __HAL_RNG_ENABLE(hrng);
<> 144:ef7eb2e8f9f7 140
<> 144:ef7eb2e8f9f7 141 /* Initialize the RNG state */
<> 144:ef7eb2e8f9f7 142 hrng->State = HAL_RNG_STATE_READY;
<> 144:ef7eb2e8f9f7 143
<> 144:ef7eb2e8f9f7 144 __HAL_UNLOCK(hrng);
<> 144:ef7eb2e8f9f7 145
<> 144:ef7eb2e8f9f7 146 /* Return function status */
<> 144:ef7eb2e8f9f7 147 return HAL_OK;
<> 144:ef7eb2e8f9f7 148 }
<> 144:ef7eb2e8f9f7 149
<> 144:ef7eb2e8f9f7 150 /**
<> 144:ef7eb2e8f9f7 151 * @brief DeInitializes the RNG peripheral.
<> 144:ef7eb2e8f9f7 152 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
<> 144:ef7eb2e8f9f7 153 * the configuration information for RNG.
<> 144:ef7eb2e8f9f7 154 * @retval HAL status
<> 144:ef7eb2e8f9f7 155 */
<> 144:ef7eb2e8f9f7 156 HAL_StatusTypeDef HAL_RNG_DeInit(RNG_HandleTypeDef *hrng)
<> 144:ef7eb2e8f9f7 157 {
<> 144:ef7eb2e8f9f7 158 /* Check the RNG handle allocation */
<> 144:ef7eb2e8f9f7 159 if(hrng == NULL)
<> 144:ef7eb2e8f9f7 160 {
<> 144:ef7eb2e8f9f7 161 return HAL_ERROR;
<> 144:ef7eb2e8f9f7 162 }
<> 144:ef7eb2e8f9f7 163 /* Disable the RNG Peripheral */
<> 144:ef7eb2e8f9f7 164 CLEAR_BIT(hrng->Instance->CR, RNG_CR_IE | RNG_CR_RNGEN);
<> 144:ef7eb2e8f9f7 165
<> 144:ef7eb2e8f9f7 166 /* Clear RNG interrupt status flags */
<> 144:ef7eb2e8f9f7 167 CLEAR_BIT(hrng->Instance->SR, RNG_SR_CEIS | RNG_SR_SEIS);
<> 144:ef7eb2e8f9f7 168
<> 144:ef7eb2e8f9f7 169 /* DeInit the low level hardware */
<> 144:ef7eb2e8f9f7 170 HAL_RNG_MspDeInit(hrng);
<> 144:ef7eb2e8f9f7 171
<> 144:ef7eb2e8f9f7 172 /* Update the RNG state */
<> 144:ef7eb2e8f9f7 173 hrng->State = HAL_RNG_STATE_RESET;
<> 144:ef7eb2e8f9f7 174
<> 144:ef7eb2e8f9f7 175 /* Release Lock */
<> 144:ef7eb2e8f9f7 176 __HAL_UNLOCK(hrng);
<> 144:ef7eb2e8f9f7 177
<> 144:ef7eb2e8f9f7 178 /* Return the function status */
<> 144:ef7eb2e8f9f7 179 return HAL_OK;
<> 144:ef7eb2e8f9f7 180 }
<> 144:ef7eb2e8f9f7 181
<> 144:ef7eb2e8f9f7 182 /**
<> 144:ef7eb2e8f9f7 183 * @brief Initializes the RNG MSP.
<> 144:ef7eb2e8f9f7 184 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
<> 144:ef7eb2e8f9f7 185 * the configuration information for RNG.
<> 144:ef7eb2e8f9f7 186 * @retval None
<> 144:ef7eb2e8f9f7 187 */
<> 144:ef7eb2e8f9f7 188 __weak void HAL_RNG_MspInit(RNG_HandleTypeDef *hrng)
<> 144:ef7eb2e8f9f7 189 {
<> 144:ef7eb2e8f9f7 190 /* Prevent unused argument(s) compilation warning */
<> 144:ef7eb2e8f9f7 191 UNUSED(hrng);
<> 144:ef7eb2e8f9f7 192 /* NOTE : This function should not be modified. When the callback is needed,
<> 144:ef7eb2e8f9f7 193 function HAL_RNG_MspInit must be implemented in the user file.
<> 144:ef7eb2e8f9f7 194 */
<> 144:ef7eb2e8f9f7 195 }
<> 144:ef7eb2e8f9f7 196
<> 144:ef7eb2e8f9f7 197 /**
<> 144:ef7eb2e8f9f7 198 * @brief DeInitializes the RNG MSP.
<> 144:ef7eb2e8f9f7 199 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
<> 144:ef7eb2e8f9f7 200 * the configuration information for RNG.
<> 144:ef7eb2e8f9f7 201 * @retval None
<> 144:ef7eb2e8f9f7 202 */
<> 144:ef7eb2e8f9f7 203 __weak void HAL_RNG_MspDeInit(RNG_HandleTypeDef *hrng)
<> 144:ef7eb2e8f9f7 204 {
<> 144:ef7eb2e8f9f7 205 /* Prevent unused argument(s) compilation warning */
<> 144:ef7eb2e8f9f7 206 UNUSED(hrng);
<> 144:ef7eb2e8f9f7 207 /* NOTE : This function should not be modified. When the callback is needed,
<> 144:ef7eb2e8f9f7 208 function HAL_RNG_MspDeInit must be implemented in the user file.
<> 144:ef7eb2e8f9f7 209 */
<> 144:ef7eb2e8f9f7 210 }
<> 144:ef7eb2e8f9f7 211
<> 144:ef7eb2e8f9f7 212 /**
<> 144:ef7eb2e8f9f7 213 * @}
<> 144:ef7eb2e8f9f7 214 */
<> 144:ef7eb2e8f9f7 215
<> 144:ef7eb2e8f9f7 216 /** @addtogroup RNG_Exported_Functions_Group2
<> 144:ef7eb2e8f9f7 217 * @brief Peripheral Control functions
<> 144:ef7eb2e8f9f7 218 *
<> 144:ef7eb2e8f9f7 219 @verbatim
<> 144:ef7eb2e8f9f7 220 ===============================================================================
<> 144:ef7eb2e8f9f7 221 ##### Peripheral Control functions #####
<> 144:ef7eb2e8f9f7 222 ===============================================================================
<> 144:ef7eb2e8f9f7 223 [..] This section provides functions allowing to:
<> 144:ef7eb2e8f9f7 224 (+) Get the 32 bit Random number
<> 144:ef7eb2e8f9f7 225 (+) Get the 32 bit Random number with interrupt enabled
<> 144:ef7eb2e8f9f7 226 (+) Handle RNG interrupt request
<> 144:ef7eb2e8f9f7 227
<> 144:ef7eb2e8f9f7 228 @endverbatim
<> 144:ef7eb2e8f9f7 229 * @{
<> 144:ef7eb2e8f9f7 230 */
<> 144:ef7eb2e8f9f7 231
<> 144:ef7eb2e8f9f7 232 /**
<> 144:ef7eb2e8f9f7 233 * @brief Generates a 32-bit random number.
<> 144:ef7eb2e8f9f7 234 * @note Each time the random number data is read the RNG_FLAG_DRDY flag
<> 144:ef7eb2e8f9f7 235 * is automatically cleared.
<> 144:ef7eb2e8f9f7 236 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
<> 144:ef7eb2e8f9f7 237 * the configuration information for RNG.
<> 144:ef7eb2e8f9f7 238 * @param random32bit: pointer to generated random number variable if successful.
<> 144:ef7eb2e8f9f7 239 * @retval HAL status
<> 144:ef7eb2e8f9f7 240 */
<> 144:ef7eb2e8f9f7 241
<> 144:ef7eb2e8f9f7 242 HAL_StatusTypeDef HAL_RNG_GenerateRandomNumber(RNG_HandleTypeDef *hrng, uint32_t *random32bit)
<> 144:ef7eb2e8f9f7 243 {
<> 144:ef7eb2e8f9f7 244 uint32_t tickstart = 0U;
<> 144:ef7eb2e8f9f7 245 HAL_StatusTypeDef status = HAL_OK;
<> 144:ef7eb2e8f9f7 246
<> 144:ef7eb2e8f9f7 247 /* Process Locked */
<> 144:ef7eb2e8f9f7 248 __HAL_LOCK(hrng);
<> 144:ef7eb2e8f9f7 249
<> 144:ef7eb2e8f9f7 250 /* Check RNG peripheral state */
<> 144:ef7eb2e8f9f7 251 if(hrng->State == HAL_RNG_STATE_READY)
<> 144:ef7eb2e8f9f7 252 {
<> 144:ef7eb2e8f9f7 253 /* Change RNG peripheral state */
<> 144:ef7eb2e8f9f7 254 hrng->State = HAL_RNG_STATE_BUSY;
<> 144:ef7eb2e8f9f7 255
<> 144:ef7eb2e8f9f7 256 /* Get tick */
<> 144:ef7eb2e8f9f7 257 tickstart = HAL_GetTick();
<> 144:ef7eb2e8f9f7 258
<> 144:ef7eb2e8f9f7 259 /* Check if data register contains valid random data */
<> 144:ef7eb2e8f9f7 260 while(__HAL_RNG_GET_FLAG(hrng, RNG_FLAG_DRDY) == RESET)
<> 144:ef7eb2e8f9f7 261 {
<> 144:ef7eb2e8f9f7 262 if((HAL_GetTick() - tickstart ) > RNG_TIMEOUT_VALUE)
<> 144:ef7eb2e8f9f7 263 {
<> 144:ef7eb2e8f9f7 264 hrng->State = HAL_RNG_STATE_ERROR;
<> 144:ef7eb2e8f9f7 265
<> 144:ef7eb2e8f9f7 266 /* Process Unlocked */
<> 144:ef7eb2e8f9f7 267 __HAL_UNLOCK(hrng);
<> 144:ef7eb2e8f9f7 268
<> 144:ef7eb2e8f9f7 269 return HAL_TIMEOUT;
<> 144:ef7eb2e8f9f7 270 }
<> 144:ef7eb2e8f9f7 271 }
<> 144:ef7eb2e8f9f7 272
<> 144:ef7eb2e8f9f7 273 /* Get a 32bit Random number */
<> 144:ef7eb2e8f9f7 274 hrng->RandomNumber = hrng->Instance->DR;
<> 144:ef7eb2e8f9f7 275 *random32bit = hrng->RandomNumber;
<> 144:ef7eb2e8f9f7 276
<> 144:ef7eb2e8f9f7 277 hrng->State = HAL_RNG_STATE_READY;
<> 144:ef7eb2e8f9f7 278 }
<> 144:ef7eb2e8f9f7 279 else
<> 144:ef7eb2e8f9f7 280 {
<> 144:ef7eb2e8f9f7 281 status = HAL_ERROR;
<> 144:ef7eb2e8f9f7 282 }
<> 144:ef7eb2e8f9f7 283
<> 144:ef7eb2e8f9f7 284 /* Process Unlocked */
<> 144:ef7eb2e8f9f7 285 __HAL_UNLOCK(hrng);
<> 144:ef7eb2e8f9f7 286
<> 144:ef7eb2e8f9f7 287 return status;
<> 144:ef7eb2e8f9f7 288 }
<> 144:ef7eb2e8f9f7 289
<> 144:ef7eb2e8f9f7 290 /**
<> 144:ef7eb2e8f9f7 291 * @brief Generates a 32-bit random number in interrupt mode.
<> 144:ef7eb2e8f9f7 292 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
<> 144:ef7eb2e8f9f7 293 * the configuration information for RNG.
<> 144:ef7eb2e8f9f7 294 * @retval HAL status
<> 144:ef7eb2e8f9f7 295 */
<> 144:ef7eb2e8f9f7 296 HAL_StatusTypeDef HAL_RNG_GenerateRandomNumber_IT(RNG_HandleTypeDef *hrng)
<> 144:ef7eb2e8f9f7 297 {
<> 144:ef7eb2e8f9f7 298 HAL_StatusTypeDef status = HAL_OK;
<> 144:ef7eb2e8f9f7 299
<> 144:ef7eb2e8f9f7 300 /* Process Locked */
<> 144:ef7eb2e8f9f7 301 __HAL_LOCK(hrng);
<> 144:ef7eb2e8f9f7 302
<> 144:ef7eb2e8f9f7 303 /* Check RNG peripheral state */
<> 144:ef7eb2e8f9f7 304 if(hrng->State == HAL_RNG_STATE_READY)
<> 144:ef7eb2e8f9f7 305 {
<> 144:ef7eb2e8f9f7 306 /* Change RNG peripheral state */
<> 144:ef7eb2e8f9f7 307 hrng->State = HAL_RNG_STATE_BUSY;
<> 144:ef7eb2e8f9f7 308
<> 144:ef7eb2e8f9f7 309 /* Process Unlocked */
<> 144:ef7eb2e8f9f7 310 __HAL_UNLOCK(hrng);
<> 144:ef7eb2e8f9f7 311
<> 144:ef7eb2e8f9f7 312 /* Enable the RNG Interrupts: Data Ready, Clock error, Seed error */
<> 144:ef7eb2e8f9f7 313 __HAL_RNG_ENABLE_IT(hrng);
<> 144:ef7eb2e8f9f7 314 }
<> 144:ef7eb2e8f9f7 315 else
<> 144:ef7eb2e8f9f7 316 {
<> 144:ef7eb2e8f9f7 317 /* Process Unlocked */
<> 144:ef7eb2e8f9f7 318 __HAL_UNLOCK(hrng);
<> 144:ef7eb2e8f9f7 319
<> 144:ef7eb2e8f9f7 320 status = HAL_ERROR;
<> 144:ef7eb2e8f9f7 321 }
<> 144:ef7eb2e8f9f7 322
<> 144:ef7eb2e8f9f7 323 return status;
<> 144:ef7eb2e8f9f7 324 }
<> 144:ef7eb2e8f9f7 325
<> 144:ef7eb2e8f9f7 326 /**
<> 144:ef7eb2e8f9f7 327 * @brief Handles RNG interrupt request.
<> 144:ef7eb2e8f9f7 328 * @note In the case of a clock error, the RNG is no more able to generate
<> 144:ef7eb2e8f9f7 329 * random numbers because the PLL48CLK clock is not correct. User has
<> 144:ef7eb2e8f9f7 330 * to check that the clock controller is correctly configured to provide
<> 144:ef7eb2e8f9f7 331 * the RNG clock and clear the CEIS bit using __HAL_RNG_CLEAR_IT().
<> 144:ef7eb2e8f9f7 332 * The clock error has no impact on the previously generated
<> 144:ef7eb2e8f9f7 333 * random numbers, and the RNG_DR register contents can be used.
<> 144:ef7eb2e8f9f7 334 * @note In the case of a seed error, the generation of random numbers is
<> 144:ef7eb2e8f9f7 335 * interrupted as long as the SECS bit is '1'. If a number is
<> 144:ef7eb2e8f9f7 336 * available in the RNG_DR register, it must not be used because it may
<> 144:ef7eb2e8f9f7 337 * not have enough entropy. In this case, it is recommended to clear the
<> 144:ef7eb2e8f9f7 338 * SEIS bit using __HAL_RNG_CLEAR_IT(), then disable and enable
<> 144:ef7eb2e8f9f7 339 * the RNG peripheral to reinitialize and restart the RNG.
<> 144:ef7eb2e8f9f7 340 * @note User-written HAL_RNG_ErrorCallback() API is called once whether SEIS
<> 144:ef7eb2e8f9f7 341 * or CEIS are set.
<> 144:ef7eb2e8f9f7 342 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
<> 144:ef7eb2e8f9f7 343 * the configuration information for RNG.
<> 144:ef7eb2e8f9f7 344 * @retval None
<> 144:ef7eb2e8f9f7 345
<> 144:ef7eb2e8f9f7 346 */
<> 144:ef7eb2e8f9f7 347 void HAL_RNG_IRQHandler(RNG_HandleTypeDef *hrng)
<> 144:ef7eb2e8f9f7 348 {
<> 144:ef7eb2e8f9f7 349 /* RNG clock error interrupt occurred */
<> 144:ef7eb2e8f9f7 350 if((__HAL_RNG_GET_IT(hrng, RNG_IT_CEI) != RESET) || (__HAL_RNG_GET_IT(hrng, RNG_IT_SEI) != RESET))
<> 144:ef7eb2e8f9f7 351 {
<> 144:ef7eb2e8f9f7 352 /* Change RNG peripheral state */
<> 144:ef7eb2e8f9f7 353 hrng->State = HAL_RNG_STATE_ERROR;
<> 144:ef7eb2e8f9f7 354
<> 144:ef7eb2e8f9f7 355 HAL_RNG_ErrorCallback(hrng);
<> 144:ef7eb2e8f9f7 356
<> 144:ef7eb2e8f9f7 357 /* Clear the clock error flag */
<> 144:ef7eb2e8f9f7 358 __HAL_RNG_CLEAR_IT(hrng, RNG_IT_CEI|RNG_IT_SEI);
<> 144:ef7eb2e8f9f7 359
<> 144:ef7eb2e8f9f7 360 }
<> 144:ef7eb2e8f9f7 361
<> 144:ef7eb2e8f9f7 362 /* Check RNG data ready interrupt occurred */
<> 144:ef7eb2e8f9f7 363 if(__HAL_RNG_GET_IT(hrng, RNG_IT_DRDY) != RESET)
<> 144:ef7eb2e8f9f7 364 {
<> 144:ef7eb2e8f9f7 365 /* Generate random number once, so disable the IT */
<> 144:ef7eb2e8f9f7 366 __HAL_RNG_DISABLE_IT(hrng);
<> 144:ef7eb2e8f9f7 367
<> 144:ef7eb2e8f9f7 368 /* Get the 32bit Random number (DRDY flag automatically cleared) */
<> 144:ef7eb2e8f9f7 369 hrng->RandomNumber = hrng->Instance->DR;
<> 144:ef7eb2e8f9f7 370
<> 144:ef7eb2e8f9f7 371 if(hrng->State != HAL_RNG_STATE_ERROR)
<> 144:ef7eb2e8f9f7 372 {
<> 144:ef7eb2e8f9f7 373 /* Change RNG peripheral state */
<> 144:ef7eb2e8f9f7 374 hrng->State = HAL_RNG_STATE_READY;
<> 144:ef7eb2e8f9f7 375
<> 144:ef7eb2e8f9f7 376 /* Data Ready callback */
<> 144:ef7eb2e8f9f7 377 HAL_RNG_ReadyDataCallback(hrng, hrng->RandomNumber);
<> 144:ef7eb2e8f9f7 378 }
<> 144:ef7eb2e8f9f7 379 }
<> 144:ef7eb2e8f9f7 380 }
<> 144:ef7eb2e8f9f7 381
<> 144:ef7eb2e8f9f7 382 /**
<> 144:ef7eb2e8f9f7 383 * @brief Returns generated random number in polling mode (Obsolete)
<> 144:ef7eb2e8f9f7 384 * Use HAL_RNG_GenerateRandomNumber() API instead.
<> 144:ef7eb2e8f9f7 385 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
<> 144:ef7eb2e8f9f7 386 * the configuration information for RNG.
<> 144:ef7eb2e8f9f7 387 * @retval Random value
<> 144:ef7eb2e8f9f7 388 */
<> 144:ef7eb2e8f9f7 389 uint32_t HAL_RNG_GetRandomNumber(RNG_HandleTypeDef *hrng)
<> 144:ef7eb2e8f9f7 390 {
<> 144:ef7eb2e8f9f7 391 if(HAL_RNG_GenerateRandomNumber(hrng, &(hrng->RandomNumber)) == HAL_OK)
<> 144:ef7eb2e8f9f7 392 {
<> 144:ef7eb2e8f9f7 393 return hrng->RandomNumber;
<> 144:ef7eb2e8f9f7 394 }
<> 144:ef7eb2e8f9f7 395 else
<> 144:ef7eb2e8f9f7 396 {
<> 144:ef7eb2e8f9f7 397 return 0U;
<> 144:ef7eb2e8f9f7 398 }
<> 144:ef7eb2e8f9f7 399 }
<> 144:ef7eb2e8f9f7 400
<> 144:ef7eb2e8f9f7 401 /**
<> 144:ef7eb2e8f9f7 402 * @brief Returns a 32-bit random number with interrupt enabled (Obsolete),
<> 144:ef7eb2e8f9f7 403 * Use HAL_RNG_GenerateRandomNumber_IT() API instead.
<> 144:ef7eb2e8f9f7 404 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
<> 144:ef7eb2e8f9f7 405 * the configuration information for RNG.
<> 144:ef7eb2e8f9f7 406 * @retval 32-bit random number
<> 144:ef7eb2e8f9f7 407 */
<> 144:ef7eb2e8f9f7 408 uint32_t HAL_RNG_GetRandomNumber_IT(RNG_HandleTypeDef *hrng)
<> 144:ef7eb2e8f9f7 409 {
<> 144:ef7eb2e8f9f7 410 uint32_t random32bit = 0U;
<> 144:ef7eb2e8f9f7 411
<> 144:ef7eb2e8f9f7 412 /* Process locked */
<> 144:ef7eb2e8f9f7 413 __HAL_LOCK(hrng);
<> 144:ef7eb2e8f9f7 414
<> 144:ef7eb2e8f9f7 415 /* Change RNG peripheral state */
<> 144:ef7eb2e8f9f7 416 hrng->State = HAL_RNG_STATE_BUSY;
<> 144:ef7eb2e8f9f7 417
<> 144:ef7eb2e8f9f7 418 /* Get a 32bit Random number */
<> 144:ef7eb2e8f9f7 419 random32bit = hrng->Instance->DR;
<> 144:ef7eb2e8f9f7 420
<> 144:ef7eb2e8f9f7 421 /* Enable the RNG Interrupts: Data Ready, Clock error, Seed error */
<> 144:ef7eb2e8f9f7 422 __HAL_RNG_ENABLE_IT(hrng);
<> 144:ef7eb2e8f9f7 423
<> 144:ef7eb2e8f9f7 424 /* Return the 32 bit random number */
<> 144:ef7eb2e8f9f7 425 return random32bit;
<> 144:ef7eb2e8f9f7 426 }
<> 144:ef7eb2e8f9f7 427
<> 144:ef7eb2e8f9f7 428 /**
<> 144:ef7eb2e8f9f7 429 * @brief Read latest generated random number.
<> 144:ef7eb2e8f9f7 430 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
<> 144:ef7eb2e8f9f7 431 * the configuration information for RNG.
<> 144:ef7eb2e8f9f7 432 * @retval random value
<> 144:ef7eb2e8f9f7 433 */
<> 144:ef7eb2e8f9f7 434 uint32_t HAL_RNG_ReadLastRandomNumber(RNG_HandleTypeDef *hrng)
<> 144:ef7eb2e8f9f7 435 {
<> 144:ef7eb2e8f9f7 436 return(hrng->RandomNumber);
<> 144:ef7eb2e8f9f7 437 }
<> 144:ef7eb2e8f9f7 438
<> 144:ef7eb2e8f9f7 439 /**
<> 144:ef7eb2e8f9f7 440 * @brief Data Ready callback in non-blocking mode.
<> 144:ef7eb2e8f9f7 441 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
<> 144:ef7eb2e8f9f7 442 * the configuration information for RNG.
<> 144:ef7eb2e8f9f7 443 * @param random32bit: generated random number.
<> 144:ef7eb2e8f9f7 444 * @retval None
<> 144:ef7eb2e8f9f7 445 */
<> 144:ef7eb2e8f9f7 446 __weak void HAL_RNG_ReadyDataCallback(RNG_HandleTypeDef *hrng, uint32_t random32bit)
<> 144:ef7eb2e8f9f7 447 {
<> 144:ef7eb2e8f9f7 448 /* Prevent unused argument(s) compilation warning */
<> 144:ef7eb2e8f9f7 449 UNUSED(hrng);
<> 144:ef7eb2e8f9f7 450 UNUSED(random32bit);
<> 144:ef7eb2e8f9f7 451 /* NOTE : This function should not be modified. When the callback is needed,
<> 144:ef7eb2e8f9f7 452 function HAL_RNG_ReadyDataCallback must be implemented in the user file.
<> 144:ef7eb2e8f9f7 453 */
<> 144:ef7eb2e8f9f7 454 }
<> 144:ef7eb2e8f9f7 455
<> 144:ef7eb2e8f9f7 456 /**
<> 144:ef7eb2e8f9f7 457 * @brief RNG error callbacks.
<> 144:ef7eb2e8f9f7 458 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
<> 144:ef7eb2e8f9f7 459 * the configuration information for RNG.
<> 144:ef7eb2e8f9f7 460 * @retval None
<> 144:ef7eb2e8f9f7 461 */
<> 144:ef7eb2e8f9f7 462 __weak void HAL_RNG_ErrorCallback(RNG_HandleTypeDef *hrng)
<> 144:ef7eb2e8f9f7 463 {
<> 144:ef7eb2e8f9f7 464 /* Prevent unused argument(s) compilation warning */
<> 144:ef7eb2e8f9f7 465 UNUSED(hrng);
<> 144:ef7eb2e8f9f7 466 /* NOTE : This function should not be modified. When the callback is needed,
<> 144:ef7eb2e8f9f7 467 function HAL_RNG_ErrorCallback must be implemented in the user file.
<> 144:ef7eb2e8f9f7 468 */
<> 144:ef7eb2e8f9f7 469 }
<> 144:ef7eb2e8f9f7 470 /**
<> 144:ef7eb2e8f9f7 471 * @}
<> 144:ef7eb2e8f9f7 472 */
<> 144:ef7eb2e8f9f7 473
<> 144:ef7eb2e8f9f7 474
<> 144:ef7eb2e8f9f7 475 /** @addtogroup RNG_Exported_Functions_Group3
<> 144:ef7eb2e8f9f7 476 * @brief Peripheral State functions
<> 144:ef7eb2e8f9f7 477 *
<> 144:ef7eb2e8f9f7 478 @verbatim
<> 144:ef7eb2e8f9f7 479 ===============================================================================
<> 144:ef7eb2e8f9f7 480 ##### Peripheral State functions #####
<> 144:ef7eb2e8f9f7 481 ===============================================================================
<> 144:ef7eb2e8f9f7 482 [..]
<> 144:ef7eb2e8f9f7 483 This subsection permits to get in run-time the status of the peripheral
<> 144:ef7eb2e8f9f7 484 and the data flow.
<> 144:ef7eb2e8f9f7 485
<> 144:ef7eb2e8f9f7 486 @endverbatim
<> 144:ef7eb2e8f9f7 487 * @{
<> 144:ef7eb2e8f9f7 488 */
<> 144:ef7eb2e8f9f7 489
<> 144:ef7eb2e8f9f7 490 /**
<> 144:ef7eb2e8f9f7 491 * @brief Returns the RNG state.
<> 144:ef7eb2e8f9f7 492 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
<> 144:ef7eb2e8f9f7 493 * the configuration information for RNG.
<> 144:ef7eb2e8f9f7 494 * @retval HAL state
<> 144:ef7eb2e8f9f7 495 */
<> 144:ef7eb2e8f9f7 496 HAL_RNG_StateTypeDef HAL_RNG_GetState(RNG_HandleTypeDef *hrng)
<> 144:ef7eb2e8f9f7 497 {
<> 144:ef7eb2e8f9f7 498 return hrng->State;
<> 144:ef7eb2e8f9f7 499 }
<> 144:ef7eb2e8f9f7 500
<> 144:ef7eb2e8f9f7 501 /**
<> 144:ef7eb2e8f9f7 502 * @}
<> 144:ef7eb2e8f9f7 503 */
<> 144:ef7eb2e8f9f7 504
<> 144:ef7eb2e8f9f7 505 /**
<> 144:ef7eb2e8f9f7 506 * @}
<> 144:ef7eb2e8f9f7 507 */
<> 144:ef7eb2e8f9f7 508
<> 144:ef7eb2e8f9f7 509 #endif /* HAL_RNG_MODULE_ENABLED */
<> 144:ef7eb2e8f9f7 510 /**
<> 144:ef7eb2e8f9f7 511 * @}
<> 144:ef7eb2e8f9f7 512 */
<> 144:ef7eb2e8f9f7 513
<> 144:ef7eb2e8f9f7 514 /**
<> 144:ef7eb2e8f9f7 515 * @}
<> 144:ef7eb2e8f9f7 516 */
<> 144:ef7eb2e8f9f7 517
<> 144:ef7eb2e8f9f7 518 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/