PHung Tung / DISCO-F746_WAV_PLAYER

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SRC_STM32F7/targets/cmsis/TARGET_STM/TARGET_STM32F7/stm32f7xx_hal_rng.c@0:8ede47d38d10, 2019-06-04 (annotated)

Committer:
phungductung
Date:
Tue Jun 04 21:37:21 2019 +0000
Revision:
0:8ede47d38d10
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phungductung 0:8ede47d38d10 1 /**
phungductung 0:8ede47d38d10 2 ******************************************************************************
phungductung 0:8ede47d38d10 3 * @file stm32f7xx_hal_rng.c
phungductung 0:8ede47d38d10 4 * @author MCD Application Team
phungductung 0:8ede47d38d10 5 * @version V1.0.4
phungductung 0:8ede47d38d10 6 * @date 09-December-2015
phungductung 0:8ede47d38d10 7 * @brief RNG HAL module driver.
phungductung 0:8ede47d38d10 8 * This file provides firmware functions to manage the following
phungductung 0:8ede47d38d10 9 * functionalities of the Random Number Generator (RNG) peripheral:
phungductung 0:8ede47d38d10 10 * + Initialization/de-initialization functions
phungductung 0:8ede47d38d10 11 * + Peripheral Control functions
phungductung 0:8ede47d38d10 12 * + Peripheral State functions
phungductung 0:8ede47d38d10 13 *
phungductung 0:8ede47d38d10 14 @verbatim
phungductung 0:8ede47d38d10 15 ==============================================================================
phungductung 0:8ede47d38d10 16 ##### How to use this driver #####
phungductung 0:8ede47d38d10 17 ==============================================================================
phungductung 0:8ede47d38d10 18 [..]
phungductung 0:8ede47d38d10 19 The RNG HAL driver can be used as follows:
phungductung 0:8ede47d38d10 20
phungductung 0:8ede47d38d10 21 (#) Enable the RNG controller clock using __HAL_RCC_RNG_CLK_ENABLE() macro
phungductung 0:8ede47d38d10 22 in HAL_RNG_MspInit().
phungductung 0:8ede47d38d10 23 (#) Activate the RNG peripheral using HAL_RNG_Init() function.
phungductung 0:8ede47d38d10 24 (#) Wait until the 32 bit Random Number Generator contains a valid
phungductung 0:8ede47d38d10 25 random data using (polling/interrupt) mode.
phungductung 0:8ede47d38d10 26 (#) Get the 32 bit random number using HAL_RNG_GenerateRandomNumber() function.
phungductung 0:8ede47d38d10 27
phungductung 0:8ede47d38d10 28 @endverbatim
phungductung 0:8ede47d38d10 29 ******************************************************************************
phungductung 0:8ede47d38d10 30 * @attention
phungductung 0:8ede47d38d10 31 *
phungductung 0:8ede47d38d10 32 * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
phungductung 0:8ede47d38d10 33 *
phungductung 0:8ede47d38d10 34 * Redistribution and use in source and binary forms, with or without modification,
phungductung 0:8ede47d38d10 35 * are permitted provided that the following conditions are met:
phungductung 0:8ede47d38d10 36 * 1. Redistributions of source code must retain the above copyright notice,
phungductung 0:8ede47d38d10 37 * this list of conditions and the following disclaimer.
phungductung 0:8ede47d38d10 38 * 2. Redistributions in binary form must reproduce the above copyright notice,
phungductung 0:8ede47d38d10 39 * this list of conditions and the following disclaimer in the documentation
phungductung 0:8ede47d38d10 40 * and/or other materials provided with the distribution.
phungductung 0:8ede47d38d10 41 * 3. Neither the name of STMicroelectronics nor the names of its contributors
phungductung 0:8ede47d38d10 42 * may be used to endorse or promote products derived from this software
phungductung 0:8ede47d38d10 43 * without specific prior written permission.
phungductung 0:8ede47d38d10 44 *
phungductung 0:8ede47d38d10 45 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
phungductung 0:8ede47d38d10 46 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
phungductung 0:8ede47d38d10 47 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
phungductung 0:8ede47d38d10 48 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
phungductung 0:8ede47d38d10 49 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
phungductung 0:8ede47d38d10 50 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
phungductung 0:8ede47d38d10 51 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
phungductung 0:8ede47d38d10 52 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
phungductung 0:8ede47d38d10 53 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
phungductung 0:8ede47d38d10 54 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
phungductung 0:8ede47d38d10 55 *
phungductung 0:8ede47d38d10 56 ******************************************************************************
phungductung 0:8ede47d38d10 57 */
phungductung 0:8ede47d38d10 58
phungductung 0:8ede47d38d10 59 /* Includes ------------------------------------------------------------------*/
phungductung 0:8ede47d38d10 60 #include "stm32f7xx_hal.h"
phungductung 0:8ede47d38d10 61
phungductung 0:8ede47d38d10 62 /** @addtogroup STM32F7xx_HAL_Driver
phungductung 0:8ede47d38d10 63 * @{
phungductung 0:8ede47d38d10 64 */
phungductung 0:8ede47d38d10 65
phungductung 0:8ede47d38d10 66 /** @addtogroup RNG
phungductung 0:8ede47d38d10 67 * @{
phungductung 0:8ede47d38d10 68 */
phungductung 0:8ede47d38d10 69
phungductung 0:8ede47d38d10 70 #ifdef HAL_RNG_MODULE_ENABLED
phungductung 0:8ede47d38d10 71
phungductung 0:8ede47d38d10 72 /* Private types -------------------------------------------------------------*/
phungductung 0:8ede47d38d10 73 /* Private defines -----------------------------------------------------------*/
phungductung 0:8ede47d38d10 74 /* Private variables ---------------------------------------------------------*/
phungductung 0:8ede47d38d10 75 /* Private constants ---------------------------------------------------------*/
phungductung 0:8ede47d38d10 76 /** @addtogroup RNG_Private_Constants
phungductung 0:8ede47d38d10 77 * @{
phungductung 0:8ede47d38d10 78 */
phungductung 0:8ede47d38d10 79 #define RNG_TIMEOUT_VALUE 2
phungductung 0:8ede47d38d10 80 /**
phungductung 0:8ede47d38d10 81 * @}
phungductung 0:8ede47d38d10 82 */
phungductung 0:8ede47d38d10 83 /* Private macros ------------------------------------------------------------*/
phungductung 0:8ede47d38d10 84 /* Private functions prototypes ----------------------------------------------*/
phungductung 0:8ede47d38d10 85 /* Private functions ---------------------------------------------------------*/
phungductung 0:8ede47d38d10 86 /* Exported functions --------------------------------------------------------*/
phungductung 0:8ede47d38d10 87
phungductung 0:8ede47d38d10 88 /** @addtogroup RNG_Exported_Functions
phungductung 0:8ede47d38d10 89 * @{
phungductung 0:8ede47d38d10 90 */
phungductung 0:8ede47d38d10 91
phungductung 0:8ede47d38d10 92 /** @addtogroup RNG_Exported_Functions_Group1
phungductung 0:8ede47d38d10 93 * @brief Initialization and de-initialization functions
phungductung 0:8ede47d38d10 94 *
phungductung 0:8ede47d38d10 95 @verbatim
phungductung 0:8ede47d38d10 96 ===============================================================================
phungductung 0:8ede47d38d10 97 ##### Initialization and de-initialization functions #####
phungductung 0:8ede47d38d10 98 ===============================================================================
phungductung 0:8ede47d38d10 99 [..] This section provides functions allowing to:
phungductung 0:8ede47d38d10 100 (+) Initialize the RNG according to the specified parameters
phungductung 0:8ede47d38d10 101 in the RNG_InitTypeDef and create the associated handle
phungductung 0:8ede47d38d10 102 (+) DeInitialize the RNG peripheral
phungductung 0:8ede47d38d10 103 (+) Initialize the RNG MSP
phungductung 0:8ede47d38d10 104 (+) DeInitialize RNG MSP
phungductung 0:8ede47d38d10 105
phungductung 0:8ede47d38d10 106 @endverbatim
phungductung 0:8ede47d38d10 107 * @{
phungductung 0:8ede47d38d10 108 */
phungductung 0:8ede47d38d10 109
phungductung 0:8ede47d38d10 110 /**
phungductung 0:8ede47d38d10 111 * @brief Initializes the RNG peripheral and creates the associated handle.
phungductung 0:8ede47d38d10 112 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
phungductung 0:8ede47d38d10 113 * the configuration information for RNG.
phungductung 0:8ede47d38d10 114 * @retval HAL status
phungductung 0:8ede47d38d10 115 */
phungductung 0:8ede47d38d10 116 HAL_StatusTypeDef HAL_RNG_Init(RNG_HandleTypeDef *hrng)
phungductung 0:8ede47d38d10 117 {
phungductung 0:8ede47d38d10 118 /* Check the RNG handle allocation */
phungductung 0:8ede47d38d10 119 if(hrng == NULL)
phungductung 0:8ede47d38d10 120 {
phungductung 0:8ede47d38d10 121 return HAL_ERROR;
phungductung 0:8ede47d38d10 122 }
phungductung 0:8ede47d38d10 123
phungductung 0:8ede47d38d10 124 __HAL_LOCK(hrng);
phungductung 0:8ede47d38d10 125
phungductung 0:8ede47d38d10 126 if(hrng->State == HAL_RNG_STATE_RESET)
phungductung 0:8ede47d38d10 127 {
phungductung 0:8ede47d38d10 128 /* Allocate lock resource and initialize it */
phungductung 0:8ede47d38d10 129 hrng->Lock = HAL_UNLOCKED;
phungductung 0:8ede47d38d10 130
phungductung 0:8ede47d38d10 131 /* Init the low level hardware */
phungductung 0:8ede47d38d10 132 HAL_RNG_MspInit(hrng);
phungductung 0:8ede47d38d10 133 }
phungductung 0:8ede47d38d10 134
phungductung 0:8ede47d38d10 135 /* Change RNG peripheral state */
phungductung 0:8ede47d38d10 136 hrng->State = HAL_RNG_STATE_BUSY;
phungductung 0:8ede47d38d10 137
phungductung 0:8ede47d38d10 138 /* Enable the RNG Peripheral */
phungductung 0:8ede47d38d10 139 __HAL_RNG_ENABLE(hrng);
phungductung 0:8ede47d38d10 140
phungductung 0:8ede47d38d10 141 /* Initialize the RNG state */
phungductung 0:8ede47d38d10 142 hrng->State = HAL_RNG_STATE_READY;
phungductung 0:8ede47d38d10 143
phungductung 0:8ede47d38d10 144 __HAL_UNLOCK(hrng);
phungductung 0:8ede47d38d10 145
phungductung 0:8ede47d38d10 146 /* Return function status */
phungductung 0:8ede47d38d10 147 return HAL_OK;
phungductung 0:8ede47d38d10 148 }
phungductung 0:8ede47d38d10 149
phungductung 0:8ede47d38d10 150 /**
phungductung 0:8ede47d38d10 151 * @brief DeInitializes the RNG peripheral.
phungductung 0:8ede47d38d10 152 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
phungductung 0:8ede47d38d10 153 * the configuration information for RNG.
phungductung 0:8ede47d38d10 154 * @retval HAL status
phungductung 0:8ede47d38d10 155 */
phungductung 0:8ede47d38d10 156 HAL_StatusTypeDef HAL_RNG_DeInit(RNG_HandleTypeDef *hrng)
phungductung 0:8ede47d38d10 157 {
phungductung 0:8ede47d38d10 158 /* Check the RNG handle allocation */
phungductung 0:8ede47d38d10 159 if(hrng == NULL)
phungductung 0:8ede47d38d10 160 {
phungductung 0:8ede47d38d10 161 return HAL_ERROR;
phungductung 0:8ede47d38d10 162 }
phungductung 0:8ede47d38d10 163 /* Disable the RNG Peripheral */
phungductung 0:8ede47d38d10 164 CLEAR_BIT(hrng->Instance->CR, RNG_CR_IE | RNG_CR_RNGEN);
phungductung 0:8ede47d38d10 165
phungductung 0:8ede47d38d10 166 /* Clear RNG interrupt status flags */
phungductung 0:8ede47d38d10 167 CLEAR_BIT(hrng->Instance->SR, RNG_SR_CEIS | RNG_SR_SEIS);
phungductung 0:8ede47d38d10 168
phungductung 0:8ede47d38d10 169 /* DeInit the low level hardware */
phungductung 0:8ede47d38d10 170 HAL_RNG_MspDeInit(hrng);
phungductung 0:8ede47d38d10 171
phungductung 0:8ede47d38d10 172 /* Update the RNG state */
phungductung 0:8ede47d38d10 173 hrng->State = HAL_RNG_STATE_RESET;
phungductung 0:8ede47d38d10 174
phungductung 0:8ede47d38d10 175 /* Release Lock */
phungductung 0:8ede47d38d10 176 __HAL_UNLOCK(hrng);
phungductung 0:8ede47d38d10 177
phungductung 0:8ede47d38d10 178 /* Return the function status */
phungductung 0:8ede47d38d10 179 return HAL_OK;
phungductung 0:8ede47d38d10 180 }
phungductung 0:8ede47d38d10 181
phungductung 0:8ede47d38d10 182 /**
phungductung 0:8ede47d38d10 183 * @brief Initializes the RNG MSP.
phungductung 0:8ede47d38d10 184 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
phungductung 0:8ede47d38d10 185 * the configuration information for RNG.
phungductung 0:8ede47d38d10 186 * @retval None
phungductung 0:8ede47d38d10 187 */
phungductung 0:8ede47d38d10 188 __weak void HAL_RNG_MspInit(RNG_HandleTypeDef *hrng)
phungductung 0:8ede47d38d10 189 {
phungductung 0:8ede47d38d10 190 /* Prevent unused argument(s) compilation warning */
phungductung 0:8ede47d38d10 191 UNUSED(hrng);
phungductung 0:8ede47d38d10 192
phungductung 0:8ede47d38d10 193 /* NOTE : This function should not be modified. When the callback is needed,
phungductung 0:8ede47d38d10 194 function HAL_RNG_MspInit must be implemented in the user file.
phungductung 0:8ede47d38d10 195 */
phungductung 0:8ede47d38d10 196 }
phungductung 0:8ede47d38d10 197
phungductung 0:8ede47d38d10 198 /**
phungductung 0:8ede47d38d10 199 * @brief DeInitializes the RNG MSP.
phungductung 0:8ede47d38d10 200 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
phungductung 0:8ede47d38d10 201 * the configuration information for RNG.
phungductung 0:8ede47d38d10 202 * @retval None
phungductung 0:8ede47d38d10 203 */
phungductung 0:8ede47d38d10 204 __weak void HAL_RNG_MspDeInit(RNG_HandleTypeDef *hrng)
phungductung 0:8ede47d38d10 205 {
phungductung 0:8ede47d38d10 206 /* Prevent unused argument(s) compilation warning */
phungductung 0:8ede47d38d10 207 UNUSED(hrng);
phungductung 0:8ede47d38d10 208
phungductung 0:8ede47d38d10 209 /* NOTE : This function should not be modified. When the callback is needed,
phungductung 0:8ede47d38d10 210 function HAL_RNG_MspDeInit must be implemented in the user file.
phungductung 0:8ede47d38d10 211 */
phungductung 0:8ede47d38d10 212 }
phungductung 0:8ede47d38d10 213
phungductung 0:8ede47d38d10 214 /**
phungductung 0:8ede47d38d10 215 * @}
phungductung 0:8ede47d38d10 216 */
phungductung 0:8ede47d38d10 217
phungductung 0:8ede47d38d10 218 /** @addtogroup RNG_Exported_Functions_Group2
phungductung 0:8ede47d38d10 219 * @brief Peripheral Control functions
phungductung 0:8ede47d38d10 220 *
phungductung 0:8ede47d38d10 221 @verbatim
phungductung 0:8ede47d38d10 222 ===============================================================================
phungductung 0:8ede47d38d10 223 ##### Peripheral Control functions #####
phungductung 0:8ede47d38d10 224 ===============================================================================
phungductung 0:8ede47d38d10 225 [..] This section provides functions allowing to:
phungductung 0:8ede47d38d10 226 (+) Get the 32 bit Random number
phungductung 0:8ede47d38d10 227 (+) Get the 32 bit Random number with interrupt enabled
phungductung 0:8ede47d38d10 228 (+) Handle RNG interrupt request
phungductung 0:8ede47d38d10 229
phungductung 0:8ede47d38d10 230 @endverbatim
phungductung 0:8ede47d38d10 231 * @{
phungductung 0:8ede47d38d10 232 */
phungductung 0:8ede47d38d10 233
phungductung 0:8ede47d38d10 234 /**
phungductung 0:8ede47d38d10 235 * @brief Generates a 32-bit random number.
phungductung 0:8ede47d38d10 236 * @note Each time the random number data is read the RNG_FLAG_DRDY flag
phungductung 0:8ede47d38d10 237 * is automatically cleared.
phungductung 0:8ede47d38d10 238 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
phungductung 0:8ede47d38d10 239 * the configuration information for RNG.
phungductung 0:8ede47d38d10 240 * @param random32bit: pointer to generated random number variable if successful.
phungductung 0:8ede47d38d10 241 * @retval HAL status
phungductung 0:8ede47d38d10 242 */
phungductung 0:8ede47d38d10 243
phungductung 0:8ede47d38d10 244 HAL_StatusTypeDef HAL_RNG_GenerateRandomNumber(RNG_HandleTypeDef *hrng, uint32_t *random32bit)
phungductung 0:8ede47d38d10 245 {
phungductung 0:8ede47d38d10 246 uint32_t tickstart = 0;
phungductung 0:8ede47d38d10 247 HAL_StatusTypeDef status = HAL_OK;
phungductung 0:8ede47d38d10 248
phungductung 0:8ede47d38d10 249 /* Process Locked */
phungductung 0:8ede47d38d10 250 __HAL_LOCK(hrng);
phungductung 0:8ede47d38d10 251
phungductung 0:8ede47d38d10 252 /* Check RNG peripheral state */
phungductung 0:8ede47d38d10 253 if(hrng->State == HAL_RNG_STATE_READY)
phungductung 0:8ede47d38d10 254 {
phungductung 0:8ede47d38d10 255 /* Change RNG peripheral state */
phungductung 0:8ede47d38d10 256 hrng->State = HAL_RNG_STATE_BUSY;
phungductung 0:8ede47d38d10 257
phungductung 0:8ede47d38d10 258 /* Get tick */
phungductung 0:8ede47d38d10 259 tickstart = HAL_GetTick();
phungductung 0:8ede47d38d10 260
phungductung 0:8ede47d38d10 261 /* Check if data register contains valid random data */
phungductung 0:8ede47d38d10 262 while(__HAL_RNG_GET_FLAG(hrng, RNG_FLAG_DRDY) == RESET)
phungductung 0:8ede47d38d10 263 {
phungductung 0:8ede47d38d10 264 if((HAL_GetTick() - tickstart ) > RNG_TIMEOUT_VALUE)
phungductung 0:8ede47d38d10 265 {
phungductung 0:8ede47d38d10 266 hrng->State = HAL_RNG_STATE_ERROR;
phungductung 0:8ede47d38d10 267
phungductung 0:8ede47d38d10 268 /* Process Unlocked */
phungductung 0:8ede47d38d10 269 __HAL_UNLOCK(hrng);
phungductung 0:8ede47d38d10 270
phungductung 0:8ede47d38d10 271 return HAL_TIMEOUT;
phungductung 0:8ede47d38d10 272 }
phungductung 0:8ede47d38d10 273 }
phungductung 0:8ede47d38d10 274
phungductung 0:8ede47d38d10 275 /* Get a 32bit Random number */
phungductung 0:8ede47d38d10 276 hrng->RandomNumber = hrng->Instance->DR;
phungductung 0:8ede47d38d10 277 *random32bit = hrng->RandomNumber;
phungductung 0:8ede47d38d10 278
phungductung 0:8ede47d38d10 279 hrng->State = HAL_RNG_STATE_READY;
phungductung 0:8ede47d38d10 280 }
phungductung 0:8ede47d38d10 281 else
phungductung 0:8ede47d38d10 282 {
phungductung 0:8ede47d38d10 283 status = HAL_ERROR;
phungductung 0:8ede47d38d10 284 }
phungductung 0:8ede47d38d10 285
phungductung 0:8ede47d38d10 286 /* Process Unlocked */
phungductung 0:8ede47d38d10 287 __HAL_UNLOCK(hrng);
phungductung 0:8ede47d38d10 288
phungductung 0:8ede47d38d10 289 return status;
phungductung 0:8ede47d38d10 290 }
phungductung 0:8ede47d38d10 291
phungductung 0:8ede47d38d10 292 /**
phungductung 0:8ede47d38d10 293 * @brief Generates a 32-bit random number in interrupt mode.
phungductung 0:8ede47d38d10 294 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
phungductung 0:8ede47d38d10 295 * the configuration information for RNG.
phungductung 0:8ede47d38d10 296 * @retval HAL status
phungductung 0:8ede47d38d10 297 */
phungductung 0:8ede47d38d10 298 HAL_StatusTypeDef HAL_RNG_GenerateRandomNumber_IT(RNG_HandleTypeDef *hrng)
phungductung 0:8ede47d38d10 299 {
phungductung 0:8ede47d38d10 300 HAL_StatusTypeDef status = HAL_OK;
phungductung 0:8ede47d38d10 301
phungductung 0:8ede47d38d10 302 /* Process Locked */
phungductung 0:8ede47d38d10 303 __HAL_LOCK(hrng);
phungductung 0:8ede47d38d10 304
phungductung 0:8ede47d38d10 305 /* Check RNG peripheral state */
phungductung 0:8ede47d38d10 306 if(hrng->State == HAL_RNG_STATE_READY)
phungductung 0:8ede47d38d10 307 {
phungductung 0:8ede47d38d10 308 /* Change RNG peripheral state */
phungductung 0:8ede47d38d10 309 hrng->State = HAL_RNG_STATE_BUSY;
phungductung 0:8ede47d38d10 310
phungductung 0:8ede47d38d10 311 /* Process Unlocked */
phungductung 0:8ede47d38d10 312 __HAL_UNLOCK(hrng);
phungductung 0:8ede47d38d10 313
phungductung 0:8ede47d38d10 314 /* Enable the RNG Interrupts: Data Ready, Clock error, Seed error */
phungductung 0:8ede47d38d10 315 __HAL_RNG_ENABLE_IT(hrng);
phungductung 0:8ede47d38d10 316 }
phungductung 0:8ede47d38d10 317 else
phungductung 0:8ede47d38d10 318 {
phungductung 0:8ede47d38d10 319 /* Process Unlocked */
phungductung 0:8ede47d38d10 320 __HAL_UNLOCK(hrng);
phungductung 0:8ede47d38d10 321
phungductung 0:8ede47d38d10 322 status = HAL_ERROR;
phungductung 0:8ede47d38d10 323 }
phungductung 0:8ede47d38d10 324
phungductung 0:8ede47d38d10 325 return status;
phungductung 0:8ede47d38d10 326 }
phungductung 0:8ede47d38d10 327
phungductung 0:8ede47d38d10 328 /**
phungductung 0:8ede47d38d10 329 * @brief Handles RNG interrupt request.
phungductung 0:8ede47d38d10 330 * @note In the case of a clock error, the RNG is no more able to generate
phungductung 0:8ede47d38d10 331 * random numbers because the PLL48CLK clock is not correct. User has
phungductung 0:8ede47d38d10 332 * to check that the clock controller is correctly configured to provide
phungductung 0:8ede47d38d10 333 * the RNG clock and clear the CEIS bit using __HAL_RNG_CLEAR_IT().
phungductung 0:8ede47d38d10 334 * The clock error has no impact on the previously generated
phungductung 0:8ede47d38d10 335 * random numbers, and the RNG_DR register contents can be used.
phungductung 0:8ede47d38d10 336 * @note In the case of a seed error, the generation of random numbers is
phungductung 0:8ede47d38d10 337 * interrupted as long as the SECS bit is '1'. If a number is
phungductung 0:8ede47d38d10 338 * available in the RNG_DR register, it must not be used because it may
phungductung 0:8ede47d38d10 339 * not have enough entropy. In this case, it is recommended to clear the
phungductung 0:8ede47d38d10 340 * SEIS bit using __HAL_RNG_CLEAR_IT(), then disable and enable
phungductung 0:8ede47d38d10 341 * the RNG peripheral to reinitialize and restart the RNG.
phungductung 0:8ede47d38d10 342 * @note User-written HAL_RNG_ErrorCallback() API is called once whether SEIS
phungductung 0:8ede47d38d10 343 * or CEIS are set.
phungductung 0:8ede47d38d10 344 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
phungductung 0:8ede47d38d10 345 * the configuration information for RNG.
phungductung 0:8ede47d38d10 346 * @retval None
phungductung 0:8ede47d38d10 347
phungductung 0:8ede47d38d10 348 */
phungductung 0:8ede47d38d10 349 void HAL_RNG_IRQHandler(RNG_HandleTypeDef *hrng)
phungductung 0:8ede47d38d10 350 {
phungductung 0:8ede47d38d10 351 /* RNG clock error interrupt occurred */
phungductung 0:8ede47d38d10 352 if((__HAL_RNG_GET_IT(hrng, RNG_IT_CEI) != RESET) || (__HAL_RNG_GET_IT(hrng, RNG_IT_SEI) != RESET))
phungductung 0:8ede47d38d10 353 {
phungductung 0:8ede47d38d10 354 /* Change RNG peripheral state */
phungductung 0:8ede47d38d10 355 hrng->State = HAL_RNG_STATE_ERROR;
phungductung 0:8ede47d38d10 356
phungductung 0:8ede47d38d10 357 HAL_RNG_ErrorCallback(hrng);
phungductung 0:8ede47d38d10 358
phungductung 0:8ede47d38d10 359 /* Clear the clock error flag */
phungductung 0:8ede47d38d10 360 __HAL_RNG_CLEAR_IT(hrng, RNG_IT_CEI|RNG_IT_SEI);
phungductung 0:8ede47d38d10 361
phungductung 0:8ede47d38d10 362 }
phungductung 0:8ede47d38d10 363
phungductung 0:8ede47d38d10 364 /* Check RNG data ready interrupt occurred */
phungductung 0:8ede47d38d10 365 if(__HAL_RNG_GET_IT(hrng, RNG_IT_DRDY) != RESET)
phungductung 0:8ede47d38d10 366 {
phungductung 0:8ede47d38d10 367 /* Generate random number once, so disable the IT */
phungductung 0:8ede47d38d10 368 __HAL_RNG_DISABLE_IT(hrng);
phungductung 0:8ede47d38d10 369
phungductung 0:8ede47d38d10 370 /* Get the 32bit Random number (DRDY flag automatically cleared) */
phungductung 0:8ede47d38d10 371 hrng->RandomNumber = hrng->Instance->DR;
phungductung 0:8ede47d38d10 372
phungductung 0:8ede47d38d10 373 if(hrng->State != HAL_RNG_STATE_ERROR)
phungductung 0:8ede47d38d10 374 {
phungductung 0:8ede47d38d10 375 /* Change RNG peripheral state */
phungductung 0:8ede47d38d10 376 hrng->State = HAL_RNG_STATE_READY;
phungductung 0:8ede47d38d10 377
phungductung 0:8ede47d38d10 378 /* Data Ready callback */
phungductung 0:8ede47d38d10 379 HAL_RNG_ReadyDataCallback(hrng, hrng->RandomNumber);
phungductung 0:8ede47d38d10 380 }
phungductung 0:8ede47d38d10 381 }
phungductung 0:8ede47d38d10 382 }
phungductung 0:8ede47d38d10 383
phungductung 0:8ede47d38d10 384 /**
phungductung 0:8ede47d38d10 385 * @brief Returns generated random number in polling mode (Obsolete)
phungductung 0:8ede47d38d10 386 * Use HAL_RNG_GenerateRandomNumber() API instead.
phungductung 0:8ede47d38d10 387 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
phungductung 0:8ede47d38d10 388 * the configuration information for RNG.
phungductung 0:8ede47d38d10 389 * @retval Random value
phungductung 0:8ede47d38d10 390 */
phungductung 0:8ede47d38d10 391 uint32_t HAL_RNG_GetRandomNumber(RNG_HandleTypeDef *hrng)
phungductung 0:8ede47d38d10 392 {
phungductung 0:8ede47d38d10 393 if(HAL_RNG_GenerateRandomNumber(hrng, &(hrng->RandomNumber)) == HAL_OK)
phungductung 0:8ede47d38d10 394 {
phungductung 0:8ede47d38d10 395 return hrng->RandomNumber;
phungductung 0:8ede47d38d10 396 }
phungductung 0:8ede47d38d10 397 else
phungductung 0:8ede47d38d10 398 {
phungductung 0:8ede47d38d10 399 return 0;
phungductung 0:8ede47d38d10 400 }
phungductung 0:8ede47d38d10 401 }
phungductung 0:8ede47d38d10 402
phungductung 0:8ede47d38d10 403 /**
phungductung 0:8ede47d38d10 404 * @brief Returns a 32-bit random number with interrupt enabled (Obsolete),
phungductung 0:8ede47d38d10 405 * Use HAL_RNG_GenerateRandomNumber_IT() API instead.
phungductung 0:8ede47d38d10 406 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
phungductung 0:8ede47d38d10 407 * the configuration information for RNG.
phungductung 0:8ede47d38d10 408 * @retval 32-bit random number
phungductung 0:8ede47d38d10 409 */
phungductung 0:8ede47d38d10 410 uint32_t HAL_RNG_GetRandomNumber_IT(RNG_HandleTypeDef *hrng)
phungductung 0:8ede47d38d10 411 {
phungductung 0:8ede47d38d10 412 uint32_t random32bit = 0;
phungductung 0:8ede47d38d10 413
phungductung 0:8ede47d38d10 414 /* Process locked */
phungductung 0:8ede47d38d10 415 __HAL_LOCK(hrng);
phungductung 0:8ede47d38d10 416
phungductung 0:8ede47d38d10 417 /* Change RNG peripheral state */
phungductung 0:8ede47d38d10 418 hrng->State = HAL_RNG_STATE_BUSY;
phungductung 0:8ede47d38d10 419
phungductung 0:8ede47d38d10 420 /* Get a 32bit Random number */
phungductung 0:8ede47d38d10 421 random32bit = hrng->Instance->DR;
phungductung 0:8ede47d38d10 422
phungductung 0:8ede47d38d10 423 /* Enable the RNG Interrupts: Data Ready, Clock error, Seed error */
phungductung 0:8ede47d38d10 424 __HAL_RNG_ENABLE_IT(hrng);
phungductung 0:8ede47d38d10 425
phungductung 0:8ede47d38d10 426 /* Return the 32 bit random number */
phungductung 0:8ede47d38d10 427 return random32bit;
phungductung 0:8ede47d38d10 428 }
phungductung 0:8ede47d38d10 429
phungductung 0:8ede47d38d10 430 /**
phungductung 0:8ede47d38d10 431 * @brief Read latest generated random number.
phungductung 0:8ede47d38d10 432 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
phungductung 0:8ede47d38d10 433 * the configuration information for RNG.
phungductung 0:8ede47d38d10 434 * @retval random value
phungductung 0:8ede47d38d10 435 */
phungductung 0:8ede47d38d10 436 uint32_t HAL_RNG_ReadLastRandomNumber(RNG_HandleTypeDef *hrng)
phungductung 0:8ede47d38d10 437 {
phungductung 0:8ede47d38d10 438 return(hrng->RandomNumber);
phungductung 0:8ede47d38d10 439 }
phungductung 0:8ede47d38d10 440
phungductung 0:8ede47d38d10 441 /**
phungductung 0:8ede47d38d10 442 * @brief Data Ready callback in non-blocking mode.
phungductung 0:8ede47d38d10 443 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
phungductung 0:8ede47d38d10 444 * the configuration information for RNG.
phungductung 0:8ede47d38d10 445 * @param random32bit: generated random number.
phungductung 0:8ede47d38d10 446 * @retval None
phungductung 0:8ede47d38d10 447 */
phungductung 0:8ede47d38d10 448 __weak void HAL_RNG_ReadyDataCallback(RNG_HandleTypeDef *hrng, uint32_t random32bit)
phungductung 0:8ede47d38d10 449 {
phungductung 0:8ede47d38d10 450 /* Prevent unused argument(s) compilation warning */
phungductung 0:8ede47d38d10 451 UNUSED(hrng);
phungductung 0:8ede47d38d10 452
phungductung 0:8ede47d38d10 453 /* NOTE : This function should not be modified. When the callback is needed,
phungductung 0:8ede47d38d10 454 function HAL_RNG_ReadyDataCallback must be implemented in the user file.
phungductung 0:8ede47d38d10 455 */
phungductung 0:8ede47d38d10 456 }
phungductung 0:8ede47d38d10 457
phungductung 0:8ede47d38d10 458 /**
phungductung 0:8ede47d38d10 459 * @brief RNG error callbacks.
phungductung 0:8ede47d38d10 460 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
phungductung 0:8ede47d38d10 461 * the configuration information for RNG.
phungductung 0:8ede47d38d10 462 * @retval None
phungductung 0:8ede47d38d10 463 */
phungductung 0:8ede47d38d10 464 __weak void HAL_RNG_ErrorCallback(RNG_HandleTypeDef *hrng)
phungductung 0:8ede47d38d10 465 {
phungductung 0:8ede47d38d10 466 /* Prevent unused argument(s) compilation warning */
phungductung 0:8ede47d38d10 467 UNUSED(hrng);
phungductung 0:8ede47d38d10 468
phungductung 0:8ede47d38d10 469 /* NOTE : This function should not be modified. When the callback is needed,
phungductung 0:8ede47d38d10 470 function HAL_RNG_ErrorCallback must be implemented in the user file.
phungductung 0:8ede47d38d10 471 */
phungductung 0:8ede47d38d10 472 }
phungductung 0:8ede47d38d10 473 /**
phungductung 0:8ede47d38d10 474 * @}
phungductung 0:8ede47d38d10 475 */
phungductung 0:8ede47d38d10 476
phungductung 0:8ede47d38d10 477
phungductung 0:8ede47d38d10 478 /** @addtogroup RNG_Exported_Functions_Group3
phungductung 0:8ede47d38d10 479 * @brief Peripheral State functions
phungductung 0:8ede47d38d10 480 *
phungductung 0:8ede47d38d10 481 @verbatim
phungductung 0:8ede47d38d10 482 ===============================================================================
phungductung 0:8ede47d38d10 483 ##### Peripheral State functions #####
phungductung 0:8ede47d38d10 484 ===============================================================================
phungductung 0:8ede47d38d10 485 [..]
phungductung 0:8ede47d38d10 486 This subsection permits to get in run-time the status of the peripheral
phungductung 0:8ede47d38d10 487 and the data flow.
phungductung 0:8ede47d38d10 488
phungductung 0:8ede47d38d10 489 @endverbatim
phungductung 0:8ede47d38d10 490 * @{
phungductung 0:8ede47d38d10 491 */
phungductung 0:8ede47d38d10 492
phungductung 0:8ede47d38d10 493 /**
phungductung 0:8ede47d38d10 494 * @brief Returns the RNG state.
phungductung 0:8ede47d38d10 495 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
phungductung 0:8ede47d38d10 496 * the configuration information for RNG.
phungductung 0:8ede47d38d10 497 * @retval HAL state
phungductung 0:8ede47d38d10 498 */
phungductung 0:8ede47d38d10 499 HAL_RNG_StateTypeDef HAL_RNG_GetState(RNG_HandleTypeDef *hrng)
phungductung 0:8ede47d38d10 500 {
phungductung 0:8ede47d38d10 501 return hrng->State;
phungductung 0:8ede47d38d10 502 }
phungductung 0:8ede47d38d10 503
phungductung 0:8ede47d38d10 504 /**
phungductung 0:8ede47d38d10 505 * @}
phungductung 0:8ede47d38d10 506 */
phungductung 0:8ede47d38d10 507
phungductung 0:8ede47d38d10 508 /**
phungductung 0:8ede47d38d10 509 * @}
phungductung 0:8ede47d38d10 510 */
phungductung 0:8ede47d38d10 511
phungductung 0:8ede47d38d10 512 #endif /* HAL_RNG_MODULE_ENABLED */
phungductung 0:8ede47d38d10 513
phungductung 0:8ede47d38d10 514 /**
phungductung 0:8ede47d38d10 515 * @}
phungductung 0:8ede47d38d10 516 */
phungductung 0:8ede47d38d10 517
phungductung 0:8ede47d38d10 518 /**
phungductung 0:8ede47d38d10 519 * @}
phungductung 0:8ede47d38d10 520 */
phungductung 0:8ede47d38d10 521
phungductung 0:8ede47d38d10 522 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/