PHung Tung / SRC_STM32F7

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Dependents:   WAV

targets/cmsis/TARGET_STM/TARGET_STM32F7/stm32f7xx_hal_rng.c@0:e87aa4c49e95, 2019-06-04 (annotated)

Committer:
phungductung
Date:
Tue Jun 04 21:51:46 2019 +0000
Revision:
0:e87aa4c49e95
libray

Who changed what in which revision?

UserRevisionLine numberNew contents of line
phungductung 0:e87aa4c49e95 1 /**
phungductung 0:e87aa4c49e95 2 ******************************************************************************
phungductung 0:e87aa4c49e95 3 * @file stm32f7xx_hal_rng.c
phungductung 0:e87aa4c49e95 4 * @author MCD Application Team
phungductung 0:e87aa4c49e95 5 * @version V1.0.4
phungductung 0:e87aa4c49e95 6 * @date 09-December-2015
phungductung 0:e87aa4c49e95 7 * @brief RNG HAL module driver.
phungductung 0:e87aa4c49e95 8 * This file provides firmware functions to manage the following
phungductung 0:e87aa4c49e95 9 * functionalities of the Random Number Generator (RNG) peripheral:
phungductung 0:e87aa4c49e95 10 * + Initialization/de-initialization functions
phungductung 0:e87aa4c49e95 11 * + Peripheral Control functions
phungductung 0:e87aa4c49e95 12 * + Peripheral State functions
phungductung 0:e87aa4c49e95 13 *
phungductung 0:e87aa4c49e95 14 @verbatim
phungductung 0:e87aa4c49e95 15 ==============================================================================
phungductung 0:e87aa4c49e95 16 ##### How to use this driver #####
phungductung 0:e87aa4c49e95 17 ==============================================================================
phungductung 0:e87aa4c49e95 18 [..]
phungductung 0:e87aa4c49e95 19 The RNG HAL driver can be used as follows:
phungductung 0:e87aa4c49e95 20
phungductung 0:e87aa4c49e95 21 (#) Enable the RNG controller clock using __HAL_RCC_RNG_CLK_ENABLE() macro
phungductung 0:e87aa4c49e95 22 in HAL_RNG_MspInit().
phungductung 0:e87aa4c49e95 23 (#) Activate the RNG peripheral using HAL_RNG_Init() function.
phungductung 0:e87aa4c49e95 24 (#) Wait until the 32 bit Random Number Generator contains a valid
phungductung 0:e87aa4c49e95 25 random data using (polling/interrupt) mode.
phungductung 0:e87aa4c49e95 26 (#) Get the 32 bit random number using HAL_RNG_GenerateRandomNumber() function.
phungductung 0:e87aa4c49e95 27
phungductung 0:e87aa4c49e95 28 @endverbatim
phungductung 0:e87aa4c49e95 29 ******************************************************************************
phungductung 0:e87aa4c49e95 30 * @attention
phungductung 0:e87aa4c49e95 31 *
phungductung 0:e87aa4c49e95 32 * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
phungductung 0:e87aa4c49e95 33 *
phungductung 0:e87aa4c49e95 34 * Redistribution and use in source and binary forms, with or without modification,
phungductung 0:e87aa4c49e95 35 * are permitted provided that the following conditions are met:
phungductung 0:e87aa4c49e95 36 * 1. Redistributions of source code must retain the above copyright notice,
phungductung 0:e87aa4c49e95 37 * this list of conditions and the following disclaimer.
phungductung 0:e87aa4c49e95 38 * 2. Redistributions in binary form must reproduce the above copyright notice,
phungductung 0:e87aa4c49e95 39 * this list of conditions and the following disclaimer in the documentation
phungductung 0:e87aa4c49e95 40 * and/or other materials provided with the distribution.
phungductung 0:e87aa4c49e95 41 * 3. Neither the name of STMicroelectronics nor the names of its contributors
phungductung 0:e87aa4c49e95 42 * may be used to endorse or promote products derived from this software
phungductung 0:e87aa4c49e95 43 * without specific prior written permission.
phungductung 0:e87aa4c49e95 44 *
phungductung 0:e87aa4c49e95 45 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
phungductung 0:e87aa4c49e95 46 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
phungductung 0:e87aa4c49e95 47 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
phungductung 0:e87aa4c49e95 48 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
phungductung 0:e87aa4c49e95 49 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
phungductung 0:e87aa4c49e95 50 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
phungductung 0:e87aa4c49e95 51 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
phungductung 0:e87aa4c49e95 52 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
phungductung 0:e87aa4c49e95 53 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
phungductung 0:e87aa4c49e95 54 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
phungductung 0:e87aa4c49e95 55 *
phungductung 0:e87aa4c49e95 56 ******************************************************************************
phungductung 0:e87aa4c49e95 57 */
phungductung 0:e87aa4c49e95 58
phungductung 0:e87aa4c49e95 59 /* Includes ------------------------------------------------------------------*/
phungductung 0:e87aa4c49e95 60 #include "stm32f7xx_hal.h"
phungductung 0:e87aa4c49e95 61
phungductung 0:e87aa4c49e95 62 /** @addtogroup STM32F7xx_HAL_Driver
phungductung 0:e87aa4c49e95 63 * @{
phungductung 0:e87aa4c49e95 64 */
phungductung 0:e87aa4c49e95 65
phungductung 0:e87aa4c49e95 66 /** @addtogroup RNG
phungductung 0:e87aa4c49e95 67 * @{
phungductung 0:e87aa4c49e95 68 */
phungductung 0:e87aa4c49e95 69
phungductung 0:e87aa4c49e95 70 #ifdef HAL_RNG_MODULE_ENABLED
phungductung 0:e87aa4c49e95 71
phungductung 0:e87aa4c49e95 72 /* Private types -------------------------------------------------------------*/
phungductung 0:e87aa4c49e95 73 /* Private defines -----------------------------------------------------------*/
phungductung 0:e87aa4c49e95 74 /* Private variables ---------------------------------------------------------*/
phungductung 0:e87aa4c49e95 75 /* Private constants ---------------------------------------------------------*/
phungductung 0:e87aa4c49e95 76 /** @addtogroup RNG_Private_Constants
phungductung 0:e87aa4c49e95 77 * @{
phungductung 0:e87aa4c49e95 78 */
phungductung 0:e87aa4c49e95 79 #define RNG_TIMEOUT_VALUE 2
phungductung 0:e87aa4c49e95 80 /**
phungductung 0:e87aa4c49e95 81 * @}
phungductung 0:e87aa4c49e95 82 */
phungductung 0:e87aa4c49e95 83 /* Private macros ------------------------------------------------------------*/
phungductung 0:e87aa4c49e95 84 /* Private functions prototypes ----------------------------------------------*/
phungductung 0:e87aa4c49e95 85 /* Private functions ---------------------------------------------------------*/
phungductung 0:e87aa4c49e95 86 /* Exported functions --------------------------------------------------------*/
phungductung 0:e87aa4c49e95 87
phungductung 0:e87aa4c49e95 88 /** @addtogroup RNG_Exported_Functions
phungductung 0:e87aa4c49e95 89 * @{
phungductung 0:e87aa4c49e95 90 */
phungductung 0:e87aa4c49e95 91
phungductung 0:e87aa4c49e95 92 /** @addtogroup RNG_Exported_Functions_Group1
phungductung 0:e87aa4c49e95 93 * @brief Initialization and de-initialization functions
phungductung 0:e87aa4c49e95 94 *
phungductung 0:e87aa4c49e95 95 @verbatim
phungductung 0:e87aa4c49e95 96 ===============================================================================
phungductung 0:e87aa4c49e95 97 ##### Initialization and de-initialization functions #####
phungductung 0:e87aa4c49e95 98 ===============================================================================
phungductung 0:e87aa4c49e95 99 [..] This section provides functions allowing to:
phungductung 0:e87aa4c49e95 100 (+) Initialize the RNG according to the specified parameters
phungductung 0:e87aa4c49e95 101 in the RNG_InitTypeDef and create the associated handle
phungductung 0:e87aa4c49e95 102 (+) DeInitialize the RNG peripheral
phungductung 0:e87aa4c49e95 103 (+) Initialize the RNG MSP
phungductung 0:e87aa4c49e95 104 (+) DeInitialize RNG MSP
phungductung 0:e87aa4c49e95 105
phungductung 0:e87aa4c49e95 106 @endverbatim
phungductung 0:e87aa4c49e95 107 * @{
phungductung 0:e87aa4c49e95 108 */
phungductung 0:e87aa4c49e95 109
phungductung 0:e87aa4c49e95 110 /**
phungductung 0:e87aa4c49e95 111 * @brief Initializes the RNG peripheral and creates the associated handle.
phungductung 0:e87aa4c49e95 112 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
phungductung 0:e87aa4c49e95 113 * the configuration information for RNG.
phungductung 0:e87aa4c49e95 114 * @retval HAL status
phungductung 0:e87aa4c49e95 115 */
phungductung 0:e87aa4c49e95 116 HAL_StatusTypeDef HAL_RNG_Init(RNG_HandleTypeDef *hrng)
phungductung 0:e87aa4c49e95 117 {
phungductung 0:e87aa4c49e95 118 /* Check the RNG handle allocation */
phungductung 0:e87aa4c49e95 119 if(hrng == NULL)
phungductung 0:e87aa4c49e95 120 {
phungductung 0:e87aa4c49e95 121 return HAL_ERROR;
phungductung 0:e87aa4c49e95 122 }
phungductung 0:e87aa4c49e95 123
phungductung 0:e87aa4c49e95 124 __HAL_LOCK(hrng);
phungductung 0:e87aa4c49e95 125
phungductung 0:e87aa4c49e95 126 if(hrng->State == HAL_RNG_STATE_RESET)
phungductung 0:e87aa4c49e95 127 {
phungductung 0:e87aa4c49e95 128 /* Allocate lock resource and initialize it */
phungductung 0:e87aa4c49e95 129 hrng->Lock = HAL_UNLOCKED;
phungductung 0:e87aa4c49e95 130
phungductung 0:e87aa4c49e95 131 /* Init the low level hardware */
phungductung 0:e87aa4c49e95 132 HAL_RNG_MspInit(hrng);
phungductung 0:e87aa4c49e95 133 }
phungductung 0:e87aa4c49e95 134
phungductung 0:e87aa4c49e95 135 /* Change RNG peripheral state */
phungductung 0:e87aa4c49e95 136 hrng->State = HAL_RNG_STATE_BUSY;
phungductung 0:e87aa4c49e95 137
phungductung 0:e87aa4c49e95 138 /* Enable the RNG Peripheral */
phungductung 0:e87aa4c49e95 139 __HAL_RNG_ENABLE(hrng);
phungductung 0:e87aa4c49e95 140
phungductung 0:e87aa4c49e95 141 /* Initialize the RNG state */
phungductung 0:e87aa4c49e95 142 hrng->State = HAL_RNG_STATE_READY;
phungductung 0:e87aa4c49e95 143
phungductung 0:e87aa4c49e95 144 __HAL_UNLOCK(hrng);
phungductung 0:e87aa4c49e95 145
phungductung 0:e87aa4c49e95 146 /* Return function status */
phungductung 0:e87aa4c49e95 147 return HAL_OK;
phungductung 0:e87aa4c49e95 148 }
phungductung 0:e87aa4c49e95 149
phungductung 0:e87aa4c49e95 150 /**
phungductung 0:e87aa4c49e95 151 * @brief DeInitializes the RNG peripheral.
phungductung 0:e87aa4c49e95 152 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
phungductung 0:e87aa4c49e95 153 * the configuration information for RNG.
phungductung 0:e87aa4c49e95 154 * @retval HAL status
phungductung 0:e87aa4c49e95 155 */
phungductung 0:e87aa4c49e95 156 HAL_StatusTypeDef HAL_RNG_DeInit(RNG_HandleTypeDef *hrng)
phungductung 0:e87aa4c49e95 157 {
phungductung 0:e87aa4c49e95 158 /* Check the RNG handle allocation */
phungductung 0:e87aa4c49e95 159 if(hrng == NULL)
phungductung 0:e87aa4c49e95 160 {
phungductung 0:e87aa4c49e95 161 return HAL_ERROR;
phungductung 0:e87aa4c49e95 162 }
phungductung 0:e87aa4c49e95 163 /* Disable the RNG Peripheral */
phungductung 0:e87aa4c49e95 164 CLEAR_BIT(hrng->Instance->CR, RNG_CR_IE | RNG_CR_RNGEN);
phungductung 0:e87aa4c49e95 165
phungductung 0:e87aa4c49e95 166 /* Clear RNG interrupt status flags */
phungductung 0:e87aa4c49e95 167 CLEAR_BIT(hrng->Instance->SR, RNG_SR_CEIS | RNG_SR_SEIS);
phungductung 0:e87aa4c49e95 168
phungductung 0:e87aa4c49e95 169 /* DeInit the low level hardware */
phungductung 0:e87aa4c49e95 170 HAL_RNG_MspDeInit(hrng);
phungductung 0:e87aa4c49e95 171
phungductung 0:e87aa4c49e95 172 /* Update the RNG state */
phungductung 0:e87aa4c49e95 173 hrng->State = HAL_RNG_STATE_RESET;
phungductung 0:e87aa4c49e95 174
phungductung 0:e87aa4c49e95 175 /* Release Lock */
phungductung 0:e87aa4c49e95 176 __HAL_UNLOCK(hrng);
phungductung 0:e87aa4c49e95 177
phungductung 0:e87aa4c49e95 178 /* Return the function status */
phungductung 0:e87aa4c49e95 179 return HAL_OK;
phungductung 0:e87aa4c49e95 180 }
phungductung 0:e87aa4c49e95 181
phungductung 0:e87aa4c49e95 182 /**
phungductung 0:e87aa4c49e95 183 * @brief Initializes the RNG MSP.
phungductung 0:e87aa4c49e95 184 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
phungductung 0:e87aa4c49e95 185 * the configuration information for RNG.
phungductung 0:e87aa4c49e95 186 * @retval None
phungductung 0:e87aa4c49e95 187 */
phungductung 0:e87aa4c49e95 188 __weak void HAL_RNG_MspInit(RNG_HandleTypeDef *hrng)
phungductung 0:e87aa4c49e95 189 {
phungductung 0:e87aa4c49e95 190 /* Prevent unused argument(s) compilation warning */
phungductung 0:e87aa4c49e95 191 UNUSED(hrng);
phungductung 0:e87aa4c49e95 192
phungductung 0:e87aa4c49e95 193 /* NOTE : This function should not be modified. When the callback is needed,
phungductung 0:e87aa4c49e95 194 function HAL_RNG_MspInit must be implemented in the user file.
phungductung 0:e87aa4c49e95 195 */
phungductung 0:e87aa4c49e95 196 }
phungductung 0:e87aa4c49e95 197
phungductung 0:e87aa4c49e95 198 /**
phungductung 0:e87aa4c49e95 199 * @brief DeInitializes the RNG MSP.
phungductung 0:e87aa4c49e95 200 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
phungductung 0:e87aa4c49e95 201 * the configuration information for RNG.
phungductung 0:e87aa4c49e95 202 * @retval None
phungductung 0:e87aa4c49e95 203 */
phungductung 0:e87aa4c49e95 204 __weak void HAL_RNG_MspDeInit(RNG_HandleTypeDef *hrng)
phungductung 0:e87aa4c49e95 205 {
phungductung 0:e87aa4c49e95 206 /* Prevent unused argument(s) compilation warning */
phungductung 0:e87aa4c49e95 207 UNUSED(hrng);
phungductung 0:e87aa4c49e95 208
phungductung 0:e87aa4c49e95 209 /* NOTE : This function should not be modified. When the callback is needed,
phungductung 0:e87aa4c49e95 210 function HAL_RNG_MspDeInit must be implemented in the user file.
phungductung 0:e87aa4c49e95 211 */
phungductung 0:e87aa4c49e95 212 }
phungductung 0:e87aa4c49e95 213
phungductung 0:e87aa4c49e95 214 /**
phungductung 0:e87aa4c49e95 215 * @}
phungductung 0:e87aa4c49e95 216 */
phungductung 0:e87aa4c49e95 217
phungductung 0:e87aa4c49e95 218 /** @addtogroup RNG_Exported_Functions_Group2
phungductung 0:e87aa4c49e95 219 * @brief Peripheral Control functions
phungductung 0:e87aa4c49e95 220 *
phungductung 0:e87aa4c49e95 221 @verbatim
phungductung 0:e87aa4c49e95 222 ===============================================================================
phungductung 0:e87aa4c49e95 223 ##### Peripheral Control functions #####
phungductung 0:e87aa4c49e95 224 ===============================================================================
phungductung 0:e87aa4c49e95 225 [..] This section provides functions allowing to:
phungductung 0:e87aa4c49e95 226 (+) Get the 32 bit Random number
phungductung 0:e87aa4c49e95 227 (+) Get the 32 bit Random number with interrupt enabled
phungductung 0:e87aa4c49e95 228 (+) Handle RNG interrupt request
phungductung 0:e87aa4c49e95 229
phungductung 0:e87aa4c49e95 230 @endverbatim
phungductung 0:e87aa4c49e95 231 * @{
phungductung 0:e87aa4c49e95 232 */
phungductung 0:e87aa4c49e95 233
phungductung 0:e87aa4c49e95 234 /**
phungductung 0:e87aa4c49e95 235 * @brief Generates a 32-bit random number.
phungductung 0:e87aa4c49e95 236 * @note Each time the random number data is read the RNG_FLAG_DRDY flag
phungductung 0:e87aa4c49e95 237 * is automatically cleared.
phungductung 0:e87aa4c49e95 238 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
phungductung 0:e87aa4c49e95 239 * the configuration information for RNG.
phungductung 0:e87aa4c49e95 240 * @param random32bit: pointer to generated random number variable if successful.
phungductung 0:e87aa4c49e95 241 * @retval HAL status
phungductung 0:e87aa4c49e95 242 */
phungductung 0:e87aa4c49e95 243
phungductung 0:e87aa4c49e95 244 HAL_StatusTypeDef HAL_RNG_GenerateRandomNumber(RNG_HandleTypeDef *hrng, uint32_t *random32bit)
phungductung 0:e87aa4c49e95 245 {
phungductung 0:e87aa4c49e95 246 uint32_t tickstart = 0;
phungductung 0:e87aa4c49e95 247 HAL_StatusTypeDef status = HAL_OK;
phungductung 0:e87aa4c49e95 248
phungductung 0:e87aa4c49e95 249 /* Process Locked */
phungductung 0:e87aa4c49e95 250 __HAL_LOCK(hrng);
phungductung 0:e87aa4c49e95 251
phungductung 0:e87aa4c49e95 252 /* Check RNG peripheral state */
phungductung 0:e87aa4c49e95 253 if(hrng->State == HAL_RNG_STATE_READY)
phungductung 0:e87aa4c49e95 254 {
phungductung 0:e87aa4c49e95 255 /* Change RNG peripheral state */
phungductung 0:e87aa4c49e95 256 hrng->State = HAL_RNG_STATE_BUSY;
phungductung 0:e87aa4c49e95 257
phungductung 0:e87aa4c49e95 258 /* Get tick */
phungductung 0:e87aa4c49e95 259 tickstart = HAL_GetTick();
phungductung 0:e87aa4c49e95 260
phungductung 0:e87aa4c49e95 261 /* Check if data register contains valid random data */
phungductung 0:e87aa4c49e95 262 while(__HAL_RNG_GET_FLAG(hrng, RNG_FLAG_DRDY) == RESET)
phungductung 0:e87aa4c49e95 263 {
phungductung 0:e87aa4c49e95 264 if((HAL_GetTick() - tickstart ) > RNG_TIMEOUT_VALUE)
phungductung 0:e87aa4c49e95 265 {
phungductung 0:e87aa4c49e95 266 hrng->State = HAL_RNG_STATE_ERROR;
phungductung 0:e87aa4c49e95 267
phungductung 0:e87aa4c49e95 268 /* Process Unlocked */
phungductung 0:e87aa4c49e95 269 __HAL_UNLOCK(hrng);
phungductung 0:e87aa4c49e95 270
phungductung 0:e87aa4c49e95 271 return HAL_TIMEOUT;
phungductung 0:e87aa4c49e95 272 }
phungductung 0:e87aa4c49e95 273 }
phungductung 0:e87aa4c49e95 274
phungductung 0:e87aa4c49e95 275 /* Get a 32bit Random number */
phungductung 0:e87aa4c49e95 276 hrng->RandomNumber = hrng->Instance->DR;
phungductung 0:e87aa4c49e95 277 *random32bit = hrng->RandomNumber;
phungductung 0:e87aa4c49e95 278
phungductung 0:e87aa4c49e95 279 hrng->State = HAL_RNG_STATE_READY;
phungductung 0:e87aa4c49e95 280 }
phungductung 0:e87aa4c49e95 281 else
phungductung 0:e87aa4c49e95 282 {
phungductung 0:e87aa4c49e95 283 status = HAL_ERROR;
phungductung 0:e87aa4c49e95 284 }
phungductung 0:e87aa4c49e95 285
phungductung 0:e87aa4c49e95 286 /* Process Unlocked */
phungductung 0:e87aa4c49e95 287 __HAL_UNLOCK(hrng);
phungductung 0:e87aa4c49e95 288
phungductung 0:e87aa4c49e95 289 return status;
phungductung 0:e87aa4c49e95 290 }
phungductung 0:e87aa4c49e95 291
phungductung 0:e87aa4c49e95 292 /**
phungductung 0:e87aa4c49e95 293 * @brief Generates a 32-bit random number in interrupt mode.
phungductung 0:e87aa4c49e95 294 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
phungductung 0:e87aa4c49e95 295 * the configuration information for RNG.
phungductung 0:e87aa4c49e95 296 * @retval HAL status
phungductung 0:e87aa4c49e95 297 */
phungductung 0:e87aa4c49e95 298 HAL_StatusTypeDef HAL_RNG_GenerateRandomNumber_IT(RNG_HandleTypeDef *hrng)
phungductung 0:e87aa4c49e95 299 {
phungductung 0:e87aa4c49e95 300 HAL_StatusTypeDef status = HAL_OK;
phungductung 0:e87aa4c49e95 301
phungductung 0:e87aa4c49e95 302 /* Process Locked */
phungductung 0:e87aa4c49e95 303 __HAL_LOCK(hrng);
phungductung 0:e87aa4c49e95 304
phungductung 0:e87aa4c49e95 305 /* Check RNG peripheral state */
phungductung 0:e87aa4c49e95 306 if(hrng->State == HAL_RNG_STATE_READY)
phungductung 0:e87aa4c49e95 307 {
phungductung 0:e87aa4c49e95 308 /* Change RNG peripheral state */
phungductung 0:e87aa4c49e95 309 hrng->State = HAL_RNG_STATE_BUSY;
phungductung 0:e87aa4c49e95 310
phungductung 0:e87aa4c49e95 311 /* Process Unlocked */
phungductung 0:e87aa4c49e95 312 __HAL_UNLOCK(hrng);
phungductung 0:e87aa4c49e95 313
phungductung 0:e87aa4c49e95 314 /* Enable the RNG Interrupts: Data Ready, Clock error, Seed error */
phungductung 0:e87aa4c49e95 315 __HAL_RNG_ENABLE_IT(hrng);
phungductung 0:e87aa4c49e95 316 }
phungductung 0:e87aa4c49e95 317 else
phungductung 0:e87aa4c49e95 318 {
phungductung 0:e87aa4c49e95 319 /* Process Unlocked */
phungductung 0:e87aa4c49e95 320 __HAL_UNLOCK(hrng);
phungductung 0:e87aa4c49e95 321
phungductung 0:e87aa4c49e95 322 status = HAL_ERROR;
phungductung 0:e87aa4c49e95 323 }
phungductung 0:e87aa4c49e95 324
phungductung 0:e87aa4c49e95 325 return status;
phungductung 0:e87aa4c49e95 326 }
phungductung 0:e87aa4c49e95 327
phungductung 0:e87aa4c49e95 328 /**
phungductung 0:e87aa4c49e95 329 * @brief Handles RNG interrupt request.
phungductung 0:e87aa4c49e95 330 * @note In the case of a clock error, the RNG is no more able to generate
phungductung 0:e87aa4c49e95 331 * random numbers because the PLL48CLK clock is not correct. User has
phungductung 0:e87aa4c49e95 332 * to check that the clock controller is correctly configured to provide
phungductung 0:e87aa4c49e95 333 * the RNG clock and clear the CEIS bit using __HAL_RNG_CLEAR_IT().
phungductung 0:e87aa4c49e95 334 * The clock error has no impact on the previously generated
phungductung 0:e87aa4c49e95 335 * random numbers, and the RNG_DR register contents can be used.
phungductung 0:e87aa4c49e95 336 * @note In the case of a seed error, the generation of random numbers is
phungductung 0:e87aa4c49e95 337 * interrupted as long as the SECS bit is '1'. If a number is
phungductung 0:e87aa4c49e95 338 * available in the RNG_DR register, it must not be used because it may
phungductung 0:e87aa4c49e95 339 * not have enough entropy. In this case, it is recommended to clear the
phungductung 0:e87aa4c49e95 340 * SEIS bit using __HAL_RNG_CLEAR_IT(), then disable and enable
phungductung 0:e87aa4c49e95 341 * the RNG peripheral to reinitialize and restart the RNG.
phungductung 0:e87aa4c49e95 342 * @note User-written HAL_RNG_ErrorCallback() API is called once whether SEIS
phungductung 0:e87aa4c49e95 343 * or CEIS are set.
phungductung 0:e87aa4c49e95 344 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
phungductung 0:e87aa4c49e95 345 * the configuration information for RNG.
phungductung 0:e87aa4c49e95 346 * @retval None
phungductung 0:e87aa4c49e95 347
phungductung 0:e87aa4c49e95 348 */
phungductung 0:e87aa4c49e95 349 void HAL_RNG_IRQHandler(RNG_HandleTypeDef *hrng)
phungductung 0:e87aa4c49e95 350 {
phungductung 0:e87aa4c49e95 351 /* RNG clock error interrupt occurred */
phungductung 0:e87aa4c49e95 352 if((__HAL_RNG_GET_IT(hrng, RNG_IT_CEI) != RESET) || (__HAL_RNG_GET_IT(hrng, RNG_IT_SEI) != RESET))
phungductung 0:e87aa4c49e95 353 {
phungductung 0:e87aa4c49e95 354 /* Change RNG peripheral state */
phungductung 0:e87aa4c49e95 355 hrng->State = HAL_RNG_STATE_ERROR;
phungductung 0:e87aa4c49e95 356
phungductung 0:e87aa4c49e95 357 HAL_RNG_ErrorCallback(hrng);
phungductung 0:e87aa4c49e95 358
phungductung 0:e87aa4c49e95 359 /* Clear the clock error flag */
phungductung 0:e87aa4c49e95 360 __HAL_RNG_CLEAR_IT(hrng, RNG_IT_CEI|RNG_IT_SEI);
phungductung 0:e87aa4c49e95 361
phungductung 0:e87aa4c49e95 362 }
phungductung 0:e87aa4c49e95 363
phungductung 0:e87aa4c49e95 364 /* Check RNG data ready interrupt occurred */
phungductung 0:e87aa4c49e95 365 if(__HAL_RNG_GET_IT(hrng, RNG_IT_DRDY) != RESET)
phungductung 0:e87aa4c49e95 366 {
phungductung 0:e87aa4c49e95 367 /* Generate random number once, so disable the IT */
phungductung 0:e87aa4c49e95 368 __HAL_RNG_DISABLE_IT(hrng);
phungductung 0:e87aa4c49e95 369
phungductung 0:e87aa4c49e95 370 /* Get the 32bit Random number (DRDY flag automatically cleared) */
phungductung 0:e87aa4c49e95 371 hrng->RandomNumber = hrng->Instance->DR;
phungductung 0:e87aa4c49e95 372
phungductung 0:e87aa4c49e95 373 if(hrng->State != HAL_RNG_STATE_ERROR)
phungductung 0:e87aa4c49e95 374 {
phungductung 0:e87aa4c49e95 375 /* Change RNG peripheral state */
phungductung 0:e87aa4c49e95 376 hrng->State = HAL_RNG_STATE_READY;
phungductung 0:e87aa4c49e95 377
phungductung 0:e87aa4c49e95 378 /* Data Ready callback */
phungductung 0:e87aa4c49e95 379 HAL_RNG_ReadyDataCallback(hrng, hrng->RandomNumber);
phungductung 0:e87aa4c49e95 380 }
phungductung 0:e87aa4c49e95 381 }
phungductung 0:e87aa4c49e95 382 }
phungductung 0:e87aa4c49e95 383
phungductung 0:e87aa4c49e95 384 /**
phungductung 0:e87aa4c49e95 385 * @brief Returns generated random number in polling mode (Obsolete)
phungductung 0:e87aa4c49e95 386 * Use HAL_RNG_GenerateRandomNumber() API instead.
phungductung 0:e87aa4c49e95 387 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
phungductung 0:e87aa4c49e95 388 * the configuration information for RNG.
phungductung 0:e87aa4c49e95 389 * @retval Random value
phungductung 0:e87aa4c49e95 390 */
phungductung 0:e87aa4c49e95 391 uint32_t HAL_RNG_GetRandomNumber(RNG_HandleTypeDef *hrng)
phungductung 0:e87aa4c49e95 392 {
phungductung 0:e87aa4c49e95 393 if(HAL_RNG_GenerateRandomNumber(hrng, &(hrng->RandomNumber)) == HAL_OK)
phungductung 0:e87aa4c49e95 394 {
phungductung 0:e87aa4c49e95 395 return hrng->RandomNumber;
phungductung 0:e87aa4c49e95 396 }
phungductung 0:e87aa4c49e95 397 else
phungductung 0:e87aa4c49e95 398 {
phungductung 0:e87aa4c49e95 399 return 0;
phungductung 0:e87aa4c49e95 400 }
phungductung 0:e87aa4c49e95 401 }
phungductung 0:e87aa4c49e95 402
phungductung 0:e87aa4c49e95 403 /**
phungductung 0:e87aa4c49e95 404 * @brief Returns a 32-bit random number with interrupt enabled (Obsolete),
phungductung 0:e87aa4c49e95 405 * Use HAL_RNG_GenerateRandomNumber_IT() API instead.
phungductung 0:e87aa4c49e95 406 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
phungductung 0:e87aa4c49e95 407 * the configuration information for RNG.
phungductung 0:e87aa4c49e95 408 * @retval 32-bit random number
phungductung 0:e87aa4c49e95 409 */
phungductung 0:e87aa4c49e95 410 uint32_t HAL_RNG_GetRandomNumber_IT(RNG_HandleTypeDef *hrng)
phungductung 0:e87aa4c49e95 411 {
phungductung 0:e87aa4c49e95 412 uint32_t random32bit = 0;
phungductung 0:e87aa4c49e95 413
phungductung 0:e87aa4c49e95 414 /* Process locked */
phungductung 0:e87aa4c49e95 415 __HAL_LOCK(hrng);
phungductung 0:e87aa4c49e95 416
phungductung 0:e87aa4c49e95 417 /* Change RNG peripheral state */
phungductung 0:e87aa4c49e95 418 hrng->State = HAL_RNG_STATE_BUSY;
phungductung 0:e87aa4c49e95 419
phungductung 0:e87aa4c49e95 420 /* Get a 32bit Random number */
phungductung 0:e87aa4c49e95 421 random32bit = hrng->Instance->DR;
phungductung 0:e87aa4c49e95 422
phungductung 0:e87aa4c49e95 423 /* Enable the RNG Interrupts: Data Ready, Clock error, Seed error */
phungductung 0:e87aa4c49e95 424 __HAL_RNG_ENABLE_IT(hrng);
phungductung 0:e87aa4c49e95 425
phungductung 0:e87aa4c49e95 426 /* Return the 32 bit random number */
phungductung 0:e87aa4c49e95 427 return random32bit;
phungductung 0:e87aa4c49e95 428 }
phungductung 0:e87aa4c49e95 429
phungductung 0:e87aa4c49e95 430 /**
phungductung 0:e87aa4c49e95 431 * @brief Read latest generated random number.
phungductung 0:e87aa4c49e95 432 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
phungductung 0:e87aa4c49e95 433 * the configuration information for RNG.
phungductung 0:e87aa4c49e95 434 * @retval random value
phungductung 0:e87aa4c49e95 435 */
phungductung 0:e87aa4c49e95 436 uint32_t HAL_RNG_ReadLastRandomNumber(RNG_HandleTypeDef *hrng)
phungductung 0:e87aa4c49e95 437 {
phungductung 0:e87aa4c49e95 438 return(hrng->RandomNumber);
phungductung 0:e87aa4c49e95 439 }
phungductung 0:e87aa4c49e95 440
phungductung 0:e87aa4c49e95 441 /**
phungductung 0:e87aa4c49e95 442 * @brief Data Ready callback in non-blocking mode.
phungductung 0:e87aa4c49e95 443 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
phungductung 0:e87aa4c49e95 444 * the configuration information for RNG.
phungductung 0:e87aa4c49e95 445 * @param random32bit: generated random number.
phungductung 0:e87aa4c49e95 446 * @retval None
phungductung 0:e87aa4c49e95 447 */
phungductung 0:e87aa4c49e95 448 __weak void HAL_RNG_ReadyDataCallback(RNG_HandleTypeDef *hrng, uint32_t random32bit)
phungductung 0:e87aa4c49e95 449 {
phungductung 0:e87aa4c49e95 450 /* Prevent unused argument(s) compilation warning */
phungductung 0:e87aa4c49e95 451 UNUSED(hrng);
phungductung 0:e87aa4c49e95 452
phungductung 0:e87aa4c49e95 453 /* NOTE : This function should not be modified. When the callback is needed,
phungductung 0:e87aa4c49e95 454 function HAL_RNG_ReadyDataCallback must be implemented in the user file.
phungductung 0:e87aa4c49e95 455 */
phungductung 0:e87aa4c49e95 456 }
phungductung 0:e87aa4c49e95 457
phungductung 0:e87aa4c49e95 458 /**
phungductung 0:e87aa4c49e95 459 * @brief RNG error callbacks.
phungductung 0:e87aa4c49e95 460 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
phungductung 0:e87aa4c49e95 461 * the configuration information for RNG.
phungductung 0:e87aa4c49e95 462 * @retval None
phungductung 0:e87aa4c49e95 463 */
phungductung 0:e87aa4c49e95 464 __weak void HAL_RNG_ErrorCallback(RNG_HandleTypeDef *hrng)
phungductung 0:e87aa4c49e95 465 {
phungductung 0:e87aa4c49e95 466 /* Prevent unused argument(s) compilation warning */
phungductung 0:e87aa4c49e95 467 UNUSED(hrng);
phungductung 0:e87aa4c49e95 468
phungductung 0:e87aa4c49e95 469 /* NOTE : This function should not be modified. When the callback is needed,
phungductung 0:e87aa4c49e95 470 function HAL_RNG_ErrorCallback must be implemented in the user file.
phungductung 0:e87aa4c49e95 471 */
phungductung 0:e87aa4c49e95 472 }
phungductung 0:e87aa4c49e95 473 /**
phungductung 0:e87aa4c49e95 474 * @}
phungductung 0:e87aa4c49e95 475 */
phungductung 0:e87aa4c49e95 476
phungductung 0:e87aa4c49e95 477
phungductung 0:e87aa4c49e95 478 /** @addtogroup RNG_Exported_Functions_Group3
phungductung 0:e87aa4c49e95 479 * @brief Peripheral State functions
phungductung 0:e87aa4c49e95 480 *
phungductung 0:e87aa4c49e95 481 @verbatim
phungductung 0:e87aa4c49e95 482 ===============================================================================
phungductung 0:e87aa4c49e95 483 ##### Peripheral State functions #####
phungductung 0:e87aa4c49e95 484 ===============================================================================
phungductung 0:e87aa4c49e95 485 [..]
phungductung 0:e87aa4c49e95 486 This subsection permits to get in run-time the status of the peripheral
phungductung 0:e87aa4c49e95 487 and the data flow.
phungductung 0:e87aa4c49e95 488
phungductung 0:e87aa4c49e95 489 @endverbatim
phungductung 0:e87aa4c49e95 490 * @{
phungductung 0:e87aa4c49e95 491 */
phungductung 0:e87aa4c49e95 492
phungductung 0:e87aa4c49e95 493 /**
phungductung 0:e87aa4c49e95 494 * @brief Returns the RNG state.
phungductung 0:e87aa4c49e95 495 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
phungductung 0:e87aa4c49e95 496 * the configuration information for RNG.
phungductung 0:e87aa4c49e95 497 * @retval HAL state
phungductung 0:e87aa4c49e95 498 */
phungductung 0:e87aa4c49e95 499 HAL_RNG_StateTypeDef HAL_RNG_GetState(RNG_HandleTypeDef *hrng)
phungductung 0:e87aa4c49e95 500 {
phungductung 0:e87aa4c49e95 501 return hrng->State;
phungductung 0:e87aa4c49e95 502 }
phungductung 0:e87aa4c49e95 503
phungductung 0:e87aa4c49e95 504 /**
phungductung 0:e87aa4c49e95 505 * @}
phungductung 0:e87aa4c49e95 506 */
phungductung 0:e87aa4c49e95 507
phungductung 0:e87aa4c49e95 508 /**
phungductung 0:e87aa4c49e95 509 * @}
phungductung 0:e87aa4c49e95 510 */
phungductung 0:e87aa4c49e95 511
phungductung 0:e87aa4c49e95 512 #endif /* HAL_RNG_MODULE_ENABLED */
phungductung 0:e87aa4c49e95 513
phungductung 0:e87aa4c49e95 514 /**
phungductung 0:e87aa4c49e95 515 * @}
phungductung 0:e87aa4c49e95 516 */
phungductung 0:e87aa4c49e95 517
phungductung 0:e87aa4c49e95 518 /**
phungductung 0:e87aa4c49e95 519 * @}
phungductung 0:e87aa4c49e95 520 */
phungductung 0:e87aa4c49e95 521
phungductung 0:e87aa4c49e95 522 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/