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targets/TARGET_STM/TARGET_STM32F7/device/stm32f7xx_hal_rng.c@0:098463de4c5d, 2017-01-25 (annotated)

Committer:
group-onsemi
Date:
Wed Jan 25 20:34:15 2017 +0000
Revision:
0:098463de4c5d
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
group-onsemi 0:098463de4c5d 1 /**
group-onsemi 0:098463de4c5d 2 ******************************************************************************
group-onsemi 0:098463de4c5d 3 * @file stm32f7xx_hal_rng.c
group-onsemi 0:098463de4c5d 4 * @author MCD Application Team
group-onsemi 0:098463de4c5d 5 * @version V1.1.2
group-onsemi 0:098463de4c5d 6 * @date 23-September-2016
group-onsemi 0:098463de4c5d 7 * @brief RNG HAL module driver.
group-onsemi 0:098463de4c5d 8 * This file provides firmware functions to manage the following
group-onsemi 0:098463de4c5d 9 * functionalities of the Random Number Generator (RNG) peripheral:
group-onsemi 0:098463de4c5d 10 * + Initialization/de-initialization functions
group-onsemi 0:098463de4c5d 11 * + Peripheral Control functions
group-onsemi 0:098463de4c5d 12 * + Peripheral State functions
group-onsemi 0:098463de4c5d 13 *
group-onsemi 0:098463de4c5d 14 @verbatim
group-onsemi 0:098463de4c5d 15 ==============================================================================
group-onsemi 0:098463de4c5d 16 ##### How to use this driver #####
group-onsemi 0:098463de4c5d 17 ==============================================================================
group-onsemi 0:098463de4c5d 18 [..]
group-onsemi 0:098463de4c5d 19 The RNG HAL driver can be used as follows:
group-onsemi 0:098463de4c5d 20
group-onsemi 0:098463de4c5d 21 (#) Enable the RNG controller clock using __HAL_RCC_RNG_CLK_ENABLE() macro
group-onsemi 0:098463de4c5d 22 in HAL_RNG_MspInit().
group-onsemi 0:098463de4c5d 23 (#) Activate the RNG peripheral using HAL_RNG_Init() function.
group-onsemi 0:098463de4c5d 24 (#) Wait until the 32 bit Random Number Generator contains a valid
group-onsemi 0:098463de4c5d 25 random data using (polling/interrupt) mode.
group-onsemi 0:098463de4c5d 26 (#) Get the 32 bit random number using HAL_RNG_GenerateRandomNumber() function.
group-onsemi 0:098463de4c5d 27
group-onsemi 0:098463de4c5d 28 @endverbatim
group-onsemi 0:098463de4c5d 29 ******************************************************************************
group-onsemi 0:098463de4c5d 30 * @attention
group-onsemi 0:098463de4c5d 31 *
group-onsemi 0:098463de4c5d 32 * <h2><center>&copy; COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
group-onsemi 0:098463de4c5d 33 *
group-onsemi 0:098463de4c5d 34 * Redistribution and use in source and binary forms, with or without modification,
group-onsemi 0:098463de4c5d 35 * are permitted provided that the following conditions are met:
group-onsemi 0:098463de4c5d 36 * 1. Redistributions of source code must retain the above copyright notice,
group-onsemi 0:098463de4c5d 37 * this list of conditions and the following disclaimer.
group-onsemi 0:098463de4c5d 38 * 2. Redistributions in binary form must reproduce the above copyright notice,
group-onsemi 0:098463de4c5d 39 * this list of conditions and the following disclaimer in the documentation
group-onsemi 0:098463de4c5d 40 * and/or other materials provided with the distribution.
group-onsemi 0:098463de4c5d 41 * 3. Neither the name of STMicroelectronics nor the names of its contributors
group-onsemi 0:098463de4c5d 42 * may be used to endorse or promote products derived from this software
group-onsemi 0:098463de4c5d 43 * without specific prior written permission.
group-onsemi 0:098463de4c5d 44 *
group-onsemi 0:098463de4c5d 45 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
group-onsemi 0:098463de4c5d 46 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
group-onsemi 0:098463de4c5d 47 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
group-onsemi 0:098463de4c5d 48 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
group-onsemi 0:098463de4c5d 49 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
group-onsemi 0:098463de4c5d 50 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
group-onsemi 0:098463de4c5d 51 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
group-onsemi 0:098463de4c5d 52 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
group-onsemi 0:098463de4c5d 53 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
group-onsemi 0:098463de4c5d 54 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
group-onsemi 0:098463de4c5d 55 *
group-onsemi 0:098463de4c5d 56 ******************************************************************************
group-onsemi 0:098463de4c5d 57 */
group-onsemi 0:098463de4c5d 58
group-onsemi 0:098463de4c5d 59 /* Includes ------------------------------------------------------------------*/
group-onsemi 0:098463de4c5d 60 #include "stm32f7xx_hal.h"
group-onsemi 0:098463de4c5d 61
group-onsemi 0:098463de4c5d 62 /** @addtogroup STM32F7xx_HAL_Driver
group-onsemi 0:098463de4c5d 63 * @{
group-onsemi 0:098463de4c5d 64 */
group-onsemi 0:098463de4c5d 65
group-onsemi 0:098463de4c5d 66 /** @addtogroup RNG
group-onsemi 0:098463de4c5d 67 * @{
group-onsemi 0:098463de4c5d 68 */
group-onsemi 0:098463de4c5d 69
group-onsemi 0:098463de4c5d 70 #ifdef HAL_RNG_MODULE_ENABLED
group-onsemi 0:098463de4c5d 71
group-onsemi 0:098463de4c5d 72 /* Private types -------------------------------------------------------------*/
group-onsemi 0:098463de4c5d 73 /* Private defines -----------------------------------------------------------*/
group-onsemi 0:098463de4c5d 74 /* Private variables ---------------------------------------------------------*/
group-onsemi 0:098463de4c5d 75 /* Private constants ---------------------------------------------------------*/
group-onsemi 0:098463de4c5d 76 /** @addtogroup RNG_Private_Constants
group-onsemi 0:098463de4c5d 77 * @{
group-onsemi 0:098463de4c5d 78 */
group-onsemi 0:098463de4c5d 79 #define RNG_TIMEOUT_VALUE 2
group-onsemi 0:098463de4c5d 80 /**
group-onsemi 0:098463de4c5d 81 * @}
group-onsemi 0:098463de4c5d 82 */
group-onsemi 0:098463de4c5d 83 /* Private macros ------------------------------------------------------------*/
group-onsemi 0:098463de4c5d 84 /* Private functions prototypes ----------------------------------------------*/
group-onsemi 0:098463de4c5d 85 /* Private functions ---------------------------------------------------------*/
group-onsemi 0:098463de4c5d 86 /* Exported functions --------------------------------------------------------*/
group-onsemi 0:098463de4c5d 87
group-onsemi 0:098463de4c5d 88 /** @addtogroup RNG_Exported_Functions
group-onsemi 0:098463de4c5d 89 * @{
group-onsemi 0:098463de4c5d 90 */
group-onsemi 0:098463de4c5d 91
group-onsemi 0:098463de4c5d 92 /** @addtogroup RNG_Exported_Functions_Group1
group-onsemi 0:098463de4c5d 93 * @brief Initialization and de-initialization functions
group-onsemi 0:098463de4c5d 94 *
group-onsemi 0:098463de4c5d 95 @verbatim
group-onsemi 0:098463de4c5d 96 ===============================================================================
group-onsemi 0:098463de4c5d 97 ##### Initialization and de-initialization functions #####
group-onsemi 0:098463de4c5d 98 ===============================================================================
group-onsemi 0:098463de4c5d 99 [..] This section provides functions allowing to:
group-onsemi 0:098463de4c5d 100 (+) Initialize the RNG according to the specified parameters
group-onsemi 0:098463de4c5d 101 in the RNG_InitTypeDef and create the associated handle
group-onsemi 0:098463de4c5d 102 (+) DeInitialize the RNG peripheral
group-onsemi 0:098463de4c5d 103 (+) Initialize the RNG MSP
group-onsemi 0:098463de4c5d 104 (+) DeInitialize RNG MSP
group-onsemi 0:098463de4c5d 105
group-onsemi 0:098463de4c5d 106 @endverbatim
group-onsemi 0:098463de4c5d 107 * @{
group-onsemi 0:098463de4c5d 108 */
group-onsemi 0:098463de4c5d 109
group-onsemi 0:098463de4c5d 110 /**
group-onsemi 0:098463de4c5d 111 * @brief Initializes the RNG peripheral and creates the associated handle.
group-onsemi 0:098463de4c5d 112 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
group-onsemi 0:098463de4c5d 113 * the configuration information for RNG.
group-onsemi 0:098463de4c5d 114 * @retval HAL status
group-onsemi 0:098463de4c5d 115 */
group-onsemi 0:098463de4c5d 116 HAL_StatusTypeDef HAL_RNG_Init(RNG_HandleTypeDef *hrng)
group-onsemi 0:098463de4c5d 117 {
group-onsemi 0:098463de4c5d 118 /* Check the RNG handle allocation */
group-onsemi 0:098463de4c5d 119 if(hrng == NULL)
group-onsemi 0:098463de4c5d 120 {
group-onsemi 0:098463de4c5d 121 return HAL_ERROR;
group-onsemi 0:098463de4c5d 122 }
group-onsemi 0:098463de4c5d 123
group-onsemi 0:098463de4c5d 124 __HAL_LOCK(hrng);
group-onsemi 0:098463de4c5d 125
group-onsemi 0:098463de4c5d 126 if(hrng->State == HAL_RNG_STATE_RESET)
group-onsemi 0:098463de4c5d 127 {
group-onsemi 0:098463de4c5d 128 /* Allocate lock resource and initialize it */
group-onsemi 0:098463de4c5d 129 hrng->Lock = HAL_UNLOCKED;
group-onsemi 0:098463de4c5d 130
group-onsemi 0:098463de4c5d 131 /* Init the low level hardware */
group-onsemi 0:098463de4c5d 132 HAL_RNG_MspInit(hrng);
group-onsemi 0:098463de4c5d 133 }
group-onsemi 0:098463de4c5d 134
group-onsemi 0:098463de4c5d 135 /* Change RNG peripheral state */
group-onsemi 0:098463de4c5d 136 hrng->State = HAL_RNG_STATE_BUSY;
group-onsemi 0:098463de4c5d 137
group-onsemi 0:098463de4c5d 138 /* Enable the RNG Peripheral */
group-onsemi 0:098463de4c5d 139 __HAL_RNG_ENABLE(hrng);
group-onsemi 0:098463de4c5d 140
group-onsemi 0:098463de4c5d 141 /* Initialize the RNG state */
group-onsemi 0:098463de4c5d 142 hrng->State = HAL_RNG_STATE_READY;
group-onsemi 0:098463de4c5d 143
group-onsemi 0:098463de4c5d 144 __HAL_UNLOCK(hrng);
group-onsemi 0:098463de4c5d 145
group-onsemi 0:098463de4c5d 146 /* Return function status */
group-onsemi 0:098463de4c5d 147 return HAL_OK;
group-onsemi 0:098463de4c5d 148 }
group-onsemi 0:098463de4c5d 149
group-onsemi 0:098463de4c5d 150 /**
group-onsemi 0:098463de4c5d 151 * @brief DeInitializes the RNG peripheral.
group-onsemi 0:098463de4c5d 152 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
group-onsemi 0:098463de4c5d 153 * the configuration information for RNG.
group-onsemi 0:098463de4c5d 154 * @retval HAL status
group-onsemi 0:098463de4c5d 155 */
group-onsemi 0:098463de4c5d 156 HAL_StatusTypeDef HAL_RNG_DeInit(RNG_HandleTypeDef *hrng)
group-onsemi 0:098463de4c5d 157 {
group-onsemi 0:098463de4c5d 158 /* Check the RNG handle allocation */
group-onsemi 0:098463de4c5d 159 if(hrng == NULL)
group-onsemi 0:098463de4c5d 160 {
group-onsemi 0:098463de4c5d 161 return HAL_ERROR;
group-onsemi 0:098463de4c5d 162 }
group-onsemi 0:098463de4c5d 163 /* Disable the RNG Peripheral */
group-onsemi 0:098463de4c5d 164 CLEAR_BIT(hrng->Instance->CR, RNG_CR_IE | RNG_CR_RNGEN);
group-onsemi 0:098463de4c5d 165
group-onsemi 0:098463de4c5d 166 /* Clear RNG interrupt status flags */
group-onsemi 0:098463de4c5d 167 CLEAR_BIT(hrng->Instance->SR, RNG_SR_CEIS | RNG_SR_SEIS);
group-onsemi 0:098463de4c5d 168
group-onsemi 0:098463de4c5d 169 /* DeInit the low level hardware */
group-onsemi 0:098463de4c5d 170 HAL_RNG_MspDeInit(hrng);
group-onsemi 0:098463de4c5d 171
group-onsemi 0:098463de4c5d 172 /* Update the RNG state */
group-onsemi 0:098463de4c5d 173 hrng->State = HAL_RNG_STATE_RESET;
group-onsemi 0:098463de4c5d 174
group-onsemi 0:098463de4c5d 175 /* Release Lock */
group-onsemi 0:098463de4c5d 176 __HAL_UNLOCK(hrng);
group-onsemi 0:098463de4c5d 177
group-onsemi 0:098463de4c5d 178 /* Return the function status */
group-onsemi 0:098463de4c5d 179 return HAL_OK;
group-onsemi 0:098463de4c5d 180 }
group-onsemi 0:098463de4c5d 181
group-onsemi 0:098463de4c5d 182 /**
group-onsemi 0:098463de4c5d 183 * @brief Initializes the RNG MSP.
group-onsemi 0:098463de4c5d 184 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
group-onsemi 0:098463de4c5d 185 * the configuration information for RNG.
group-onsemi 0:098463de4c5d 186 * @retval None
group-onsemi 0:098463de4c5d 187 */
group-onsemi 0:098463de4c5d 188 __weak void HAL_RNG_MspInit(RNG_HandleTypeDef *hrng)
group-onsemi 0:098463de4c5d 189 {
group-onsemi 0:098463de4c5d 190 /* Prevent unused argument(s) compilation warning */
group-onsemi 0:098463de4c5d 191 UNUSED(hrng);
group-onsemi 0:098463de4c5d 192
group-onsemi 0:098463de4c5d 193 /* NOTE : This function should not be modified. When the callback is needed,
group-onsemi 0:098463de4c5d 194 function HAL_RNG_MspInit must be implemented in the user file.
group-onsemi 0:098463de4c5d 195 */
group-onsemi 0:098463de4c5d 196 }
group-onsemi 0:098463de4c5d 197
group-onsemi 0:098463de4c5d 198 /**
group-onsemi 0:098463de4c5d 199 * @brief DeInitializes the RNG MSP.
group-onsemi 0:098463de4c5d 200 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
group-onsemi 0:098463de4c5d 201 * the configuration information for RNG.
group-onsemi 0:098463de4c5d 202 * @retval None
group-onsemi 0:098463de4c5d 203 */
group-onsemi 0:098463de4c5d 204 __weak void HAL_RNG_MspDeInit(RNG_HandleTypeDef *hrng)
group-onsemi 0:098463de4c5d 205 {
group-onsemi 0:098463de4c5d 206 /* Prevent unused argument(s) compilation warning */
group-onsemi 0:098463de4c5d 207 UNUSED(hrng);
group-onsemi 0:098463de4c5d 208
group-onsemi 0:098463de4c5d 209 /* NOTE : This function should not be modified. When the callback is needed,
group-onsemi 0:098463de4c5d 210 function HAL_RNG_MspDeInit must be implemented in the user file.
group-onsemi 0:098463de4c5d 211 */
group-onsemi 0:098463de4c5d 212 }
group-onsemi 0:098463de4c5d 213
group-onsemi 0:098463de4c5d 214 /**
group-onsemi 0:098463de4c5d 215 * @}
group-onsemi 0:098463de4c5d 216 */
group-onsemi 0:098463de4c5d 217
group-onsemi 0:098463de4c5d 218 /** @addtogroup RNG_Exported_Functions_Group2
group-onsemi 0:098463de4c5d 219 * @brief Peripheral Control functions
group-onsemi 0:098463de4c5d 220 *
group-onsemi 0:098463de4c5d 221 @verbatim
group-onsemi 0:098463de4c5d 222 ===============================================================================
group-onsemi 0:098463de4c5d 223 ##### Peripheral Control functions #####
group-onsemi 0:098463de4c5d 224 ===============================================================================
group-onsemi 0:098463de4c5d 225 [..] This section provides functions allowing to:
group-onsemi 0:098463de4c5d 226 (+) Get the 32 bit Random number
group-onsemi 0:098463de4c5d 227 (+) Get the 32 bit Random number with interrupt enabled
group-onsemi 0:098463de4c5d 228 (+) Handle RNG interrupt request
group-onsemi 0:098463de4c5d 229
group-onsemi 0:098463de4c5d 230 @endverbatim
group-onsemi 0:098463de4c5d 231 * @{
group-onsemi 0:098463de4c5d 232 */
group-onsemi 0:098463de4c5d 233
group-onsemi 0:098463de4c5d 234 /**
group-onsemi 0:098463de4c5d 235 * @brief Generates a 32-bit random number.
group-onsemi 0:098463de4c5d 236 * @note Each time the random number data is read the RNG_FLAG_DRDY flag
group-onsemi 0:098463de4c5d 237 * is automatically cleared.
group-onsemi 0:098463de4c5d 238 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
group-onsemi 0:098463de4c5d 239 * the configuration information for RNG.
group-onsemi 0:098463de4c5d 240 * @param random32bit: pointer to generated random number variable if successful.
group-onsemi 0:098463de4c5d 241 * @retval HAL status
group-onsemi 0:098463de4c5d 242 */
group-onsemi 0:098463de4c5d 243
group-onsemi 0:098463de4c5d 244 HAL_StatusTypeDef HAL_RNG_GenerateRandomNumber(RNG_HandleTypeDef *hrng, uint32_t *random32bit)
group-onsemi 0:098463de4c5d 245 {
group-onsemi 0:098463de4c5d 246 uint32_t tickstart = 0;
group-onsemi 0:098463de4c5d 247 HAL_StatusTypeDef status = HAL_OK;
group-onsemi 0:098463de4c5d 248
group-onsemi 0:098463de4c5d 249 /* Process Locked */
group-onsemi 0:098463de4c5d 250 __HAL_LOCK(hrng);
group-onsemi 0:098463de4c5d 251
group-onsemi 0:098463de4c5d 252 /* Check RNG peripheral state */
group-onsemi 0:098463de4c5d 253 if(hrng->State == HAL_RNG_STATE_READY)
group-onsemi 0:098463de4c5d 254 {
group-onsemi 0:098463de4c5d 255 /* Change RNG peripheral state */
group-onsemi 0:098463de4c5d 256 hrng->State = HAL_RNG_STATE_BUSY;
group-onsemi 0:098463de4c5d 257
group-onsemi 0:098463de4c5d 258 /* Get tick */
group-onsemi 0:098463de4c5d 259 tickstart = HAL_GetTick();
group-onsemi 0:098463de4c5d 260
group-onsemi 0:098463de4c5d 261 /* Check if data register contains valid random data */
group-onsemi 0:098463de4c5d 262 while(__HAL_RNG_GET_FLAG(hrng, RNG_FLAG_DRDY) == RESET)
group-onsemi 0:098463de4c5d 263 {
group-onsemi 0:098463de4c5d 264 if((HAL_GetTick() - tickstart ) > RNG_TIMEOUT_VALUE)
group-onsemi 0:098463de4c5d 265 {
group-onsemi 0:098463de4c5d 266 hrng->State = HAL_RNG_STATE_ERROR;
group-onsemi 0:098463de4c5d 267
group-onsemi 0:098463de4c5d 268 /* Process Unlocked */
group-onsemi 0:098463de4c5d 269 __HAL_UNLOCK(hrng);
group-onsemi 0:098463de4c5d 270
group-onsemi 0:098463de4c5d 271 return HAL_TIMEOUT;
group-onsemi 0:098463de4c5d 272 }
group-onsemi 0:098463de4c5d 273 }
group-onsemi 0:098463de4c5d 274
group-onsemi 0:098463de4c5d 275 /* Get a 32bit Random number */
group-onsemi 0:098463de4c5d 276 hrng->RandomNumber = hrng->Instance->DR;
group-onsemi 0:098463de4c5d 277 *random32bit = hrng->RandomNumber;
group-onsemi 0:098463de4c5d 278
group-onsemi 0:098463de4c5d 279 hrng->State = HAL_RNG_STATE_READY;
group-onsemi 0:098463de4c5d 280 }
group-onsemi 0:098463de4c5d 281 else
group-onsemi 0:098463de4c5d 282 {
group-onsemi 0:098463de4c5d 283 status = HAL_ERROR;
group-onsemi 0:098463de4c5d 284 }
group-onsemi 0:098463de4c5d 285
group-onsemi 0:098463de4c5d 286 /* Process Unlocked */
group-onsemi 0:098463de4c5d 287 __HAL_UNLOCK(hrng);
group-onsemi 0:098463de4c5d 288
group-onsemi 0:098463de4c5d 289 return status;
group-onsemi 0:098463de4c5d 290 }
group-onsemi 0:098463de4c5d 291
group-onsemi 0:098463de4c5d 292 /**
group-onsemi 0:098463de4c5d 293 * @brief Generates a 32-bit random number in interrupt mode.
group-onsemi 0:098463de4c5d 294 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
group-onsemi 0:098463de4c5d 295 * the configuration information for RNG.
group-onsemi 0:098463de4c5d 296 * @retval HAL status
group-onsemi 0:098463de4c5d 297 */
group-onsemi 0:098463de4c5d 298 HAL_StatusTypeDef HAL_RNG_GenerateRandomNumber_IT(RNG_HandleTypeDef *hrng)
group-onsemi 0:098463de4c5d 299 {
group-onsemi 0:098463de4c5d 300 HAL_StatusTypeDef status = HAL_OK;
group-onsemi 0:098463de4c5d 301
group-onsemi 0:098463de4c5d 302 /* Process Locked */
group-onsemi 0:098463de4c5d 303 __HAL_LOCK(hrng);
group-onsemi 0:098463de4c5d 304
group-onsemi 0:098463de4c5d 305 /* Check RNG peripheral state */
group-onsemi 0:098463de4c5d 306 if(hrng->State == HAL_RNG_STATE_READY)
group-onsemi 0:098463de4c5d 307 {
group-onsemi 0:098463de4c5d 308 /* Change RNG peripheral state */
group-onsemi 0:098463de4c5d 309 hrng->State = HAL_RNG_STATE_BUSY;
group-onsemi 0:098463de4c5d 310
group-onsemi 0:098463de4c5d 311 /* Process Unlocked */
group-onsemi 0:098463de4c5d 312 __HAL_UNLOCK(hrng);
group-onsemi 0:098463de4c5d 313
group-onsemi 0:098463de4c5d 314 /* Enable the RNG Interrupts: Data Ready, Clock error, Seed error */
group-onsemi 0:098463de4c5d 315 __HAL_RNG_ENABLE_IT(hrng);
group-onsemi 0:098463de4c5d 316 }
group-onsemi 0:098463de4c5d 317 else
group-onsemi 0:098463de4c5d 318 {
group-onsemi 0:098463de4c5d 319 /* Process Unlocked */
group-onsemi 0:098463de4c5d 320 __HAL_UNLOCK(hrng);
group-onsemi 0:098463de4c5d 321
group-onsemi 0:098463de4c5d 322 status = HAL_ERROR;
group-onsemi 0:098463de4c5d 323 }
group-onsemi 0:098463de4c5d 324
group-onsemi 0:098463de4c5d 325 return status;
group-onsemi 0:098463de4c5d 326 }
group-onsemi 0:098463de4c5d 327
group-onsemi 0:098463de4c5d 328 /**
group-onsemi 0:098463de4c5d 329 * @brief Handles RNG interrupt request.
group-onsemi 0:098463de4c5d 330 * @note In the case of a clock error, the RNG is no more able to generate
group-onsemi 0:098463de4c5d 331 * random numbers because the PLL48CLK clock is not correct. User has
group-onsemi 0:098463de4c5d 332 * to check that the clock controller is correctly configured to provide
group-onsemi 0:098463de4c5d 333 * the RNG clock and clear the CEIS bit using __HAL_RNG_CLEAR_IT().
group-onsemi 0:098463de4c5d 334 * The clock error has no impact on the previously generated
group-onsemi 0:098463de4c5d 335 * random numbers, and the RNG_DR register contents can be used.
group-onsemi 0:098463de4c5d 336 * @note In the case of a seed error, the generation of random numbers is
group-onsemi 0:098463de4c5d 337 * interrupted as long as the SECS bit is '1'. If a number is
group-onsemi 0:098463de4c5d 338 * available in the RNG_DR register, it must not be used because it may
group-onsemi 0:098463de4c5d 339 * not have enough entropy. In this case, it is recommended to clear the
group-onsemi 0:098463de4c5d 340 * SEIS bit using __HAL_RNG_CLEAR_IT(), then disable and enable
group-onsemi 0:098463de4c5d 341 * the RNG peripheral to reinitialize and restart the RNG.
group-onsemi 0:098463de4c5d 342 * @note User-written HAL_RNG_ErrorCallback() API is called once whether SEIS
group-onsemi 0:098463de4c5d 343 * or CEIS are set.
group-onsemi 0:098463de4c5d 344 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
group-onsemi 0:098463de4c5d 345 * the configuration information for RNG.
group-onsemi 0:098463de4c5d 346 * @retval None
group-onsemi 0:098463de4c5d 347
group-onsemi 0:098463de4c5d 348 */
group-onsemi 0:098463de4c5d 349 void HAL_RNG_IRQHandler(RNG_HandleTypeDef *hrng)
group-onsemi 0:098463de4c5d 350 {
group-onsemi 0:098463de4c5d 351 /* RNG clock error interrupt occurred */
group-onsemi 0:098463de4c5d 352 if((__HAL_RNG_GET_IT(hrng, RNG_IT_CEI) != RESET) || (__HAL_RNG_GET_IT(hrng, RNG_IT_SEI) != RESET))
group-onsemi 0:098463de4c5d 353 {
group-onsemi 0:098463de4c5d 354 /* Change RNG peripheral state */
group-onsemi 0:098463de4c5d 355 hrng->State = HAL_RNG_STATE_ERROR;
group-onsemi 0:098463de4c5d 356
group-onsemi 0:098463de4c5d 357 HAL_RNG_ErrorCallback(hrng);
group-onsemi 0:098463de4c5d 358
group-onsemi 0:098463de4c5d 359 /* Clear the clock error flag */
group-onsemi 0:098463de4c5d 360 __HAL_RNG_CLEAR_IT(hrng, RNG_IT_CEI|RNG_IT_SEI);
group-onsemi 0:098463de4c5d 361
group-onsemi 0:098463de4c5d 362 }
group-onsemi 0:098463de4c5d 363
group-onsemi 0:098463de4c5d 364 /* Check RNG data ready interrupt occurred */
group-onsemi 0:098463de4c5d 365 if(__HAL_RNG_GET_IT(hrng, RNG_IT_DRDY) != RESET)
group-onsemi 0:098463de4c5d 366 {
group-onsemi 0:098463de4c5d 367 /* Generate random number once, so disable the IT */
group-onsemi 0:098463de4c5d 368 __HAL_RNG_DISABLE_IT(hrng);
group-onsemi 0:098463de4c5d 369
group-onsemi 0:098463de4c5d 370 /* Get the 32bit Random number (DRDY flag automatically cleared) */
group-onsemi 0:098463de4c5d 371 hrng->RandomNumber = hrng->Instance->DR;
group-onsemi 0:098463de4c5d 372
group-onsemi 0:098463de4c5d 373 if(hrng->State != HAL_RNG_STATE_ERROR)
group-onsemi 0:098463de4c5d 374 {
group-onsemi 0:098463de4c5d 375 /* Change RNG peripheral state */
group-onsemi 0:098463de4c5d 376 hrng->State = HAL_RNG_STATE_READY;
group-onsemi 0:098463de4c5d 377
group-onsemi 0:098463de4c5d 378 /* Data Ready callback */
group-onsemi 0:098463de4c5d 379 HAL_RNG_ReadyDataCallback(hrng, hrng->RandomNumber);
group-onsemi 0:098463de4c5d 380 }
group-onsemi 0:098463de4c5d 381 }
group-onsemi 0:098463de4c5d 382 }
group-onsemi 0:098463de4c5d 383
group-onsemi 0:098463de4c5d 384 /**
group-onsemi 0:098463de4c5d 385 * @brief Returns generated random number in polling mode (Obsolete)
group-onsemi 0:098463de4c5d 386 * Use HAL_RNG_GenerateRandomNumber() API instead.
group-onsemi 0:098463de4c5d 387 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
group-onsemi 0:098463de4c5d 388 * the configuration information for RNG.
group-onsemi 0:098463de4c5d 389 * @retval Random value
group-onsemi 0:098463de4c5d 390 */
group-onsemi 0:098463de4c5d 391 uint32_t HAL_RNG_GetRandomNumber(RNG_HandleTypeDef *hrng)
group-onsemi 0:098463de4c5d 392 {
group-onsemi 0:098463de4c5d 393 if(HAL_RNG_GenerateRandomNumber(hrng, &(hrng->RandomNumber)) == HAL_OK)
group-onsemi 0:098463de4c5d 394 {
group-onsemi 0:098463de4c5d 395 return hrng->RandomNumber;
group-onsemi 0:098463de4c5d 396 }
group-onsemi 0:098463de4c5d 397 else
group-onsemi 0:098463de4c5d 398 {
group-onsemi 0:098463de4c5d 399 return 0;
group-onsemi 0:098463de4c5d 400 }
group-onsemi 0:098463de4c5d 401 }
group-onsemi 0:098463de4c5d 402
group-onsemi 0:098463de4c5d 403 /**
group-onsemi 0:098463de4c5d 404 * @brief Returns a 32-bit random number with interrupt enabled (Obsolete),
group-onsemi 0:098463de4c5d 405 * Use HAL_RNG_GenerateRandomNumber_IT() API instead.
group-onsemi 0:098463de4c5d 406 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
group-onsemi 0:098463de4c5d 407 * the configuration information for RNG.
group-onsemi 0:098463de4c5d 408 * @retval 32-bit random number
group-onsemi 0:098463de4c5d 409 */
group-onsemi 0:098463de4c5d 410 uint32_t HAL_RNG_GetRandomNumber_IT(RNG_HandleTypeDef *hrng)
group-onsemi 0:098463de4c5d 411 {
group-onsemi 0:098463de4c5d 412 uint32_t random32bit = 0;
group-onsemi 0:098463de4c5d 413
group-onsemi 0:098463de4c5d 414 /* Process locked */
group-onsemi 0:098463de4c5d 415 __HAL_LOCK(hrng);
group-onsemi 0:098463de4c5d 416
group-onsemi 0:098463de4c5d 417 /* Change RNG peripheral state */
group-onsemi 0:098463de4c5d 418 hrng->State = HAL_RNG_STATE_BUSY;
group-onsemi 0:098463de4c5d 419
group-onsemi 0:098463de4c5d 420 /* Get a 32bit Random number */
group-onsemi 0:098463de4c5d 421 random32bit = hrng->Instance->DR;
group-onsemi 0:098463de4c5d 422
group-onsemi 0:098463de4c5d 423 /* Enable the RNG Interrupts: Data Ready, Clock error, Seed error */
group-onsemi 0:098463de4c5d 424 __HAL_RNG_ENABLE_IT(hrng);
group-onsemi 0:098463de4c5d 425
group-onsemi 0:098463de4c5d 426 /* Return the 32 bit random number */
group-onsemi 0:098463de4c5d 427 return random32bit;
group-onsemi 0:098463de4c5d 428 }
group-onsemi 0:098463de4c5d 429
group-onsemi 0:098463de4c5d 430 /**
group-onsemi 0:098463de4c5d 431 * @brief Read latest generated random number.
group-onsemi 0:098463de4c5d 432 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
group-onsemi 0:098463de4c5d 433 * the configuration information for RNG.
group-onsemi 0:098463de4c5d 434 * @retval random value
group-onsemi 0:098463de4c5d 435 */
group-onsemi 0:098463de4c5d 436 uint32_t HAL_RNG_ReadLastRandomNumber(RNG_HandleTypeDef *hrng)
group-onsemi 0:098463de4c5d 437 {
group-onsemi 0:098463de4c5d 438 return(hrng->RandomNumber);
group-onsemi 0:098463de4c5d 439 }
group-onsemi 0:098463de4c5d 440
group-onsemi 0:098463de4c5d 441 /**
group-onsemi 0:098463de4c5d 442 * @brief Data Ready callback in non-blocking mode.
group-onsemi 0:098463de4c5d 443 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
group-onsemi 0:098463de4c5d 444 * the configuration information for RNG.
group-onsemi 0:098463de4c5d 445 * @param random32bit: generated random number.
group-onsemi 0:098463de4c5d 446 * @retval None
group-onsemi 0:098463de4c5d 447 */
group-onsemi 0:098463de4c5d 448 __weak void HAL_RNG_ReadyDataCallback(RNG_HandleTypeDef *hrng, uint32_t random32bit)
group-onsemi 0:098463de4c5d 449 {
group-onsemi 0:098463de4c5d 450 /* Prevent unused argument(s) compilation warning */
group-onsemi 0:098463de4c5d 451 UNUSED(hrng);
group-onsemi 0:098463de4c5d 452
group-onsemi 0:098463de4c5d 453 /* NOTE : This function should not be modified. When the callback is needed,
group-onsemi 0:098463de4c5d 454 function HAL_RNG_ReadyDataCallback must be implemented in the user file.
group-onsemi 0:098463de4c5d 455 */
group-onsemi 0:098463de4c5d 456 }
group-onsemi 0:098463de4c5d 457
group-onsemi 0:098463de4c5d 458 /**
group-onsemi 0:098463de4c5d 459 * @brief RNG error callbacks.
group-onsemi 0:098463de4c5d 460 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
group-onsemi 0:098463de4c5d 461 * the configuration information for RNG.
group-onsemi 0:098463de4c5d 462 * @retval None
group-onsemi 0:098463de4c5d 463 */
group-onsemi 0:098463de4c5d 464 __weak void HAL_RNG_ErrorCallback(RNG_HandleTypeDef *hrng)
group-onsemi 0:098463de4c5d 465 {
group-onsemi 0:098463de4c5d 466 /* Prevent unused argument(s) compilation warning */
group-onsemi 0:098463de4c5d 467 UNUSED(hrng);
group-onsemi 0:098463de4c5d 468
group-onsemi 0:098463de4c5d 469 /* NOTE : This function should not be modified. When the callback is needed,
group-onsemi 0:098463de4c5d 470 function HAL_RNG_ErrorCallback must be implemented in the user file.
group-onsemi 0:098463de4c5d 471 */
group-onsemi 0:098463de4c5d 472 }
group-onsemi 0:098463de4c5d 473 /**
group-onsemi 0:098463de4c5d 474 * @}
group-onsemi 0:098463de4c5d 475 */
group-onsemi 0:098463de4c5d 476
group-onsemi 0:098463de4c5d 477
group-onsemi 0:098463de4c5d 478 /** @addtogroup RNG_Exported_Functions_Group3
group-onsemi 0:098463de4c5d 479 * @brief Peripheral State functions
group-onsemi 0:098463de4c5d 480 *
group-onsemi 0:098463de4c5d 481 @verbatim
group-onsemi 0:098463de4c5d 482 ===============================================================================
group-onsemi 0:098463de4c5d 483 ##### Peripheral State functions #####
group-onsemi 0:098463de4c5d 484 ===============================================================================
group-onsemi 0:098463de4c5d 485 [..]
group-onsemi 0:098463de4c5d 486 This subsection permits to get in run-time the status of the peripheral
group-onsemi 0:098463de4c5d 487 and the data flow.
group-onsemi 0:098463de4c5d 488
group-onsemi 0:098463de4c5d 489 @endverbatim
group-onsemi 0:098463de4c5d 490 * @{
group-onsemi 0:098463de4c5d 491 */
group-onsemi 0:098463de4c5d 492
group-onsemi 0:098463de4c5d 493 /**
group-onsemi 0:098463de4c5d 494 * @brief Returns the RNG state.
group-onsemi 0:098463de4c5d 495 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
group-onsemi 0:098463de4c5d 496 * the configuration information for RNG.
group-onsemi 0:098463de4c5d 497 * @retval HAL state
group-onsemi 0:098463de4c5d 498 */
group-onsemi 0:098463de4c5d 499 HAL_RNG_StateTypeDef HAL_RNG_GetState(RNG_HandleTypeDef *hrng)
group-onsemi 0:098463de4c5d 500 {
group-onsemi 0:098463de4c5d 501 return hrng->State;
group-onsemi 0:098463de4c5d 502 }
group-onsemi 0:098463de4c5d 503
group-onsemi 0:098463de4c5d 504 /**
group-onsemi 0:098463de4c5d 505 * @}
group-onsemi 0:098463de4c5d 506 */
group-onsemi 0:098463de4c5d 507
group-onsemi 0:098463de4c5d 508 /**
group-onsemi 0:098463de4c5d 509 * @}
group-onsemi 0:098463de4c5d 510 */
group-onsemi 0:098463de4c5d 511
group-onsemi 0:098463de4c5d 512 #endif /* HAL_RNG_MODULE_ENABLED */
group-onsemi 0:098463de4c5d 513
group-onsemi 0:098463de4c5d 514 /**
group-onsemi 0:098463de4c5d 515 * @}
group-onsemi 0:098463de4c5d 516 */
group-onsemi 0:098463de4c5d 517
group-onsemi 0:098463de4c5d 518 /**
group-onsemi 0:098463de4c5d 519 * @}
group-onsemi 0:098463de4c5d 520 */
group-onsemi 0:098463de4c5d 521
group-onsemi 0:098463de4c5d 522 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/