Frederick Huang / mbed-STM32L452

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Dependents:   STM32L452_Nucleo_ticker

Fork of mbed-dev by mbed official

targets/TARGET_STM/TARGET_STM32L0/device/stm32l0xx_hal_rng.c@151:5eaa88a5bcc7, 2016-11-24 (annotated)

Committer:
<>
Date:
Thu Nov 24 17:03:03 2016 +0000
Revision:
151:5eaa88a5bcc7
Parent:
149:156823d33999 
This updates the lib to the mbed lib v130

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /**
<> 144:ef7eb2e8f9f7 2 ******************************************************************************
<> 144:ef7eb2e8f9f7 3 * @file stm32l0xx_hal_rng.c
<> 144:ef7eb2e8f9f7 4 * @author MCD Application Team
<> 151:5eaa88a5bcc7 5 * @version V1.7.0
<> 151:5eaa88a5bcc7 6 * @date 31-May-2016
<> 144:ef7eb2e8f9f7 7 * @brief RNG HAL module driver.
<> 144:ef7eb2e8f9f7 8 * This file provides firmware functions to manage the following
<> 144:ef7eb2e8f9f7 9 * functionalities of the Random Number Generator (RNG) peripheral:
<> 144:ef7eb2e8f9f7 10 * + Initialization/de-initialization functions
<> 144:ef7eb2e8f9f7 11 * + Peripheral Control functions
<> 144:ef7eb2e8f9f7 12 * + Peripheral State functions
<> 144:ef7eb2e8f9f7 13 *
<> 144:ef7eb2e8f9f7 14 @verbatim
<> 144:ef7eb2e8f9f7 15 ==============================================================================
<> 144:ef7eb2e8f9f7 16 ##### How to use this driver #####
<> 144:ef7eb2e8f9f7 17 ==============================================================================
<> 144:ef7eb2e8f9f7 18 [..]
<> 144:ef7eb2e8f9f7 19 The RNG HAL driver can be used as follows:
<> 144:ef7eb2e8f9f7 20
<> 144:ef7eb2e8f9f7 21 (#) Enable the RNG controller clock using __HAL_RCC_RNG_CLK_ENABLE() macro.
<> 144:ef7eb2e8f9f7 22 in HAL_RNG_MspInit().
<> 144:ef7eb2e8f9f7 23 (#) Activate the RNG peripheral using HAL_RNG_Init() function.
<> 144:ef7eb2e8f9f7 24 (#) Wait until the 32 bit Random Number Generator contains a valid
<> 144:ef7eb2e8f9f7 25 random data using (polling/interrupt) mode.
<> 144:ef7eb2e8f9f7 26 (#) Get the 32 bit random number using HAL_RNG_GenerateRandomNumber() function.
<> 144:ef7eb2e8f9f7 27
<> 144:ef7eb2e8f9f7 28 @endverbatim
<> 144:ef7eb2e8f9f7 29 ******************************************************************************
<> 144:ef7eb2e8f9f7 30 * @attention
<> 144:ef7eb2e8f9f7 31 *
<> 144:ef7eb2e8f9f7 32 * <h2><center>&copy; COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
<> 144:ef7eb2e8f9f7 33 *
<> 144:ef7eb2e8f9f7 34 * Redistribution and use in source and binary forms, with or without modification,
<> 144:ef7eb2e8f9f7 35 * are permitted provided that the following conditions are met:
<> 144:ef7eb2e8f9f7 36 * 1. Redistributions of source code must retain the above copyright notice,
<> 144:ef7eb2e8f9f7 37 * this list of conditions and the following disclaimer.
<> 144:ef7eb2e8f9f7 38 * 2. Redistributions in binary form must reproduce the above copyright notice,
<> 144:ef7eb2e8f9f7 39 * this list of conditions and the following disclaimer in the documentation
<> 144:ef7eb2e8f9f7 40 * and/or other materials provided with the distribution.
<> 144:ef7eb2e8f9f7 41 * 3. Neither the name of STMicroelectronics nor the names of its contributors
<> 144:ef7eb2e8f9f7 42 * may be used to endorse or promote products derived from this software
<> 144:ef7eb2e8f9f7 43 * without specific prior written permission.
<> 144:ef7eb2e8f9f7 44 *
<> 144:ef7eb2e8f9f7 45 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
<> 144:ef7eb2e8f9f7 46 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
<> 144:ef7eb2e8f9f7 47 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
<> 144:ef7eb2e8f9f7 48 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
<> 144:ef7eb2e8f9f7 49 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
<> 144:ef7eb2e8f9f7 50 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
<> 144:ef7eb2e8f9f7 51 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
<> 144:ef7eb2e8f9f7 52 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
<> 144:ef7eb2e8f9f7 53 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
<> 144:ef7eb2e8f9f7 54 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
<> 144:ef7eb2e8f9f7 55 *
<> 144:ef7eb2e8f9f7 56 ******************************************************************************
<> 144:ef7eb2e8f9f7 57 */
<> 144:ef7eb2e8f9f7 58
<> 144:ef7eb2e8f9f7 59 /* Includes ------------------------------------------------------------------*/
<> 144:ef7eb2e8f9f7 60 #include "stm32l0xx_hal.h"
<> 144:ef7eb2e8f9f7 61
<> 144:ef7eb2e8f9f7 62 /** @addtogroup STM32L0xx_HAL_Driver
<> 144:ef7eb2e8f9f7 63 * @{
<> 144:ef7eb2e8f9f7 64 */
<> 144:ef7eb2e8f9f7 65
<> 144:ef7eb2e8f9f7 66 #ifdef HAL_RNG_MODULE_ENABLED
<> 144:ef7eb2e8f9f7 67
<> 144:ef7eb2e8f9f7 68
<> 144:ef7eb2e8f9f7 69 #if defined (STM32L052xx) || defined (STM32L053xx) || defined (STM32L062xx) || defined (STM32L063xx) || \
<> 144:ef7eb2e8f9f7 70 defined (STM32L072xx) || defined (STM32L073xx) || defined (STM32L082xx) || defined (STM32L083xx)
<> 144:ef7eb2e8f9f7 71
<> 144:ef7eb2e8f9f7 72 /** @addtogroup RNG
<> 144:ef7eb2e8f9f7 73 * @{
<> 144:ef7eb2e8f9f7 74 */
<> 144:ef7eb2e8f9f7 75
<> 144:ef7eb2e8f9f7 76 /* Private types -------------------------------------------------------------*/
<> 144:ef7eb2e8f9f7 77 /* Private Defines -----------------------------------------------------------*/
<> 144:ef7eb2e8f9f7 78 /** @addtogroup RNG_Private
<> 144:ef7eb2e8f9f7 79 * @{
<> 144:ef7eb2e8f9f7 80 */
<> 151:5eaa88a5bcc7 81 #define RNG_TIMEOUT_VALUE 1000U
<> 144:ef7eb2e8f9f7 82 /**
<> 144:ef7eb2e8f9f7 83 * @}
<> 144:ef7eb2e8f9f7 84 */
<> 144:ef7eb2e8f9f7 85
<> 144:ef7eb2e8f9f7 86 /* Private variables ---------------------------------------------------------*/
<> 144:ef7eb2e8f9f7 87 /* Private constants ---------------------------------------------------------*/
<> 144:ef7eb2e8f9f7 88 /* Private macros ------------------------------------------------------------*/
<> 144:ef7eb2e8f9f7 89 /* Private functions prototypes ----------------------------------------------*/
<> 144:ef7eb2e8f9f7 90 /* Private functions ---------------------------------------------------------*/
<> 144:ef7eb2e8f9f7 91 /* Exported functions --------------------------------------------------------*/
<> 144:ef7eb2e8f9f7 92
<> 144:ef7eb2e8f9f7 93 /** @addtogroup RNG_Exported_Functions
<> 144:ef7eb2e8f9f7 94 * @{
<> 144:ef7eb2e8f9f7 95 */
<> 144:ef7eb2e8f9f7 96
<> 144:ef7eb2e8f9f7 97 /** @addtogroup RNG_Exported_Functions_Group1
<> 144:ef7eb2e8f9f7 98 * @brief Initialization and de-initialization functions
<> 144:ef7eb2e8f9f7 99 *
<> 144:ef7eb2e8f9f7 100 @verbatim
<> 144:ef7eb2e8f9f7 101 ===============================================================================
<> 144:ef7eb2e8f9f7 102 ##### Initialization and de-initialization functions #####
<> 144:ef7eb2e8f9f7 103 ===============================================================================
<> 144:ef7eb2e8f9f7 104 [..] This section provides functions allowing to:
<> 144:ef7eb2e8f9f7 105 (+) Initialize the RNG according to the specified parameters
<> 144:ef7eb2e8f9f7 106 in the RNG_InitTypeDef and create the associated handle
<> 144:ef7eb2e8f9f7 107 (+) DeInitialize the RNG peripheral
<> 144:ef7eb2e8f9f7 108 (+) Initialize the RNG MSP
<> 144:ef7eb2e8f9f7 109 (+) DeInitialize RNG MSP
<> 144:ef7eb2e8f9f7 110
<> 144:ef7eb2e8f9f7 111 @endverbatim
<> 144:ef7eb2e8f9f7 112 * @{
<> 144:ef7eb2e8f9f7 113 */
<> 144:ef7eb2e8f9f7 114
<> 144:ef7eb2e8f9f7 115 /**
<> 144:ef7eb2e8f9f7 116 * @brief Initializes the RNG peripheral and creates the associated handle.
<> 144:ef7eb2e8f9f7 117 * @param hrng: pointer to a RNG_HandleTypeDef structure.
<> 144:ef7eb2e8f9f7 118 * @retval HAL status
<> 144:ef7eb2e8f9f7 119 */
<> 144:ef7eb2e8f9f7 120 HAL_StatusTypeDef HAL_RNG_Init(RNG_HandleTypeDef *hrng)
<> 144:ef7eb2e8f9f7 121 {
<> 144:ef7eb2e8f9f7 122 /* Check the RNG handle allocation */
<> 144:ef7eb2e8f9f7 123 if(hrng == NULL)
<> 144:ef7eb2e8f9f7 124 {
<> 144:ef7eb2e8f9f7 125 return HAL_ERROR;
<> 144:ef7eb2e8f9f7 126 }
<> 144:ef7eb2e8f9f7 127 assert_param(IS_RNG_ALL_INSTANCE(hrng->Instance));
<> 144:ef7eb2e8f9f7 128
<> 144:ef7eb2e8f9f7 129 __HAL_LOCK(hrng);
<> 144:ef7eb2e8f9f7 130
<> 144:ef7eb2e8f9f7 131 if(hrng->State == HAL_RNG_STATE_RESET)
<> 144:ef7eb2e8f9f7 132 {
<> 144:ef7eb2e8f9f7 133 /* Allocate lock resource and initialize it */
<> 144:ef7eb2e8f9f7 134 hrng->Lock = HAL_UNLOCKED;
<> 144:ef7eb2e8f9f7 135
<> 144:ef7eb2e8f9f7 136 /* Init the low level hardware */
<> 144:ef7eb2e8f9f7 137 HAL_RNG_MspInit(hrng);
<> 144:ef7eb2e8f9f7 138 }
<> 144:ef7eb2e8f9f7 139
<> 144:ef7eb2e8f9f7 140 /* Change RNG peripheral state */
<> 144:ef7eb2e8f9f7 141 hrng->State = HAL_RNG_STATE_BUSY;
<> 144:ef7eb2e8f9f7 142
<> 144:ef7eb2e8f9f7 143 /* Enable the RNG Peripheral */
<> 144:ef7eb2e8f9f7 144 __HAL_RNG_ENABLE(hrng);
<> 144:ef7eb2e8f9f7 145
<> 144:ef7eb2e8f9f7 146 /* Initialize the RNG state */
<> 144:ef7eb2e8f9f7 147 hrng->State = HAL_RNG_STATE_READY;
<> 144:ef7eb2e8f9f7 148
<> 144:ef7eb2e8f9f7 149 __HAL_UNLOCK(hrng);
<> 144:ef7eb2e8f9f7 150
<> 144:ef7eb2e8f9f7 151 /* Return function status */
<> 144:ef7eb2e8f9f7 152 return HAL_OK;
<> 144:ef7eb2e8f9f7 153 }
<> 144:ef7eb2e8f9f7 154
<> 144:ef7eb2e8f9f7 155 /**
<> 144:ef7eb2e8f9f7 156 * @brief DeInitializes the RNG peripheral.
<> 144:ef7eb2e8f9f7 157 * @param hrng: pointer to a RNG_HandleTypeDef structure.
<> 144:ef7eb2e8f9f7 158 * @retval HAL status
<> 144:ef7eb2e8f9f7 159 */
<> 144:ef7eb2e8f9f7 160 HAL_StatusTypeDef HAL_RNG_DeInit(RNG_HandleTypeDef *hrng)
<> 144:ef7eb2e8f9f7 161 {
<> 144:ef7eb2e8f9f7 162 /* Check the RNG handle allocation */
<> 144:ef7eb2e8f9f7 163 if(hrng == NULL)
<> 144:ef7eb2e8f9f7 164 {
<> 144:ef7eb2e8f9f7 165 return HAL_ERROR;
<> 144:ef7eb2e8f9f7 166 }
<> 144:ef7eb2e8f9f7 167 /* Disable the RNG Peripheral */
<> 144:ef7eb2e8f9f7 168 CLEAR_BIT(hrng->Instance->CR, RNG_CR_IE | RNG_CR_RNGEN);
<> 144:ef7eb2e8f9f7 169
<> 144:ef7eb2e8f9f7 170 /* Clear RNG interrupt status flags */
<> 144:ef7eb2e8f9f7 171 CLEAR_BIT(hrng->Instance->SR, RNG_SR_CEIS | RNG_SR_SEIS);
<> 144:ef7eb2e8f9f7 172
<> 144:ef7eb2e8f9f7 173 /* DeInit the low level hardware */
<> 144:ef7eb2e8f9f7 174 HAL_RNG_MspDeInit(hrng);
<> 144:ef7eb2e8f9f7 175
<> 144:ef7eb2e8f9f7 176 /* Update the RNG state */
<> 144:ef7eb2e8f9f7 177 hrng->State = HAL_RNG_STATE_RESET;
<> 144:ef7eb2e8f9f7 178
<> 144:ef7eb2e8f9f7 179 /* Release Lock */
<> 144:ef7eb2e8f9f7 180 __HAL_UNLOCK(hrng);
<> 144:ef7eb2e8f9f7 181
<> 144:ef7eb2e8f9f7 182 /* Return the function status */
<> 144:ef7eb2e8f9f7 183 return HAL_OK;
<> 144:ef7eb2e8f9f7 184 }
<> 144:ef7eb2e8f9f7 185
<> 144:ef7eb2e8f9f7 186 /**
<> 144:ef7eb2e8f9f7 187 * @brief Initializes the RNG MSP.
<> 144:ef7eb2e8f9f7 188 * @param hrng: pointer to a RNG_HandleTypeDef structure.
<> 144:ef7eb2e8f9f7 189 * @retval None
<> 144:ef7eb2e8f9f7 190 */
<> 144:ef7eb2e8f9f7 191 __weak void HAL_RNG_MspInit(RNG_HandleTypeDef *hrng)
<> 144:ef7eb2e8f9f7 192 {
<> 144:ef7eb2e8f9f7 193 /* Prevent unused argument(s) compilation warning */
<> 144:ef7eb2e8f9f7 194 UNUSED(hrng);
<> 144:ef7eb2e8f9f7 195
<> 144:ef7eb2e8f9f7 196 /* NOTE : This function should not be modified. When the callback is needed,
<> 144:ef7eb2e8f9f7 197 function HAL_RNG_MspInit must be implemented in the user file.
<> 144:ef7eb2e8f9f7 198 */
<> 144:ef7eb2e8f9f7 199 }
<> 144:ef7eb2e8f9f7 200
<> 144:ef7eb2e8f9f7 201 /**
<> 144:ef7eb2e8f9f7 202 * @brief DeInitializes the RNG MSP.
<> 144:ef7eb2e8f9f7 203 * @param hrng: pointer to a RNG_HandleTypeDef structure.
<> 144:ef7eb2e8f9f7 204 * @retval None
<> 144:ef7eb2e8f9f7 205 */
<> 144:ef7eb2e8f9f7 206 __weak void HAL_RNG_MspDeInit(RNG_HandleTypeDef *hrng)
<> 144:ef7eb2e8f9f7 207 {
<> 144:ef7eb2e8f9f7 208 /* Prevent unused argument(s) compilation warning */
<> 144:ef7eb2e8f9f7 209 UNUSED(hrng);
<> 144:ef7eb2e8f9f7 210
<> 144:ef7eb2e8f9f7 211 /* NOTE : This function should not be modified. When the callback is needed,
<> 144:ef7eb2e8f9f7 212 function HAL_RNG_MspDeInit must be implemented in the user file.
<> 144:ef7eb2e8f9f7 213 */
<> 144:ef7eb2e8f9f7 214 }
<> 144:ef7eb2e8f9f7 215
<> 144:ef7eb2e8f9f7 216 /**
<> 144:ef7eb2e8f9f7 217 * @}
<> 144:ef7eb2e8f9f7 218 */
<> 144:ef7eb2e8f9f7 219
<> 144:ef7eb2e8f9f7 220 /** @addtogroup RNG_Exported_Functions_Group2
<> 144:ef7eb2e8f9f7 221 * @brief Peripheral Control functions
<> 144:ef7eb2e8f9f7 222 *
<> 144:ef7eb2e8f9f7 223 @verbatim
<> 144:ef7eb2e8f9f7 224 ===============================================================================
<> 144:ef7eb2e8f9f7 225 ##### Peripheral Control functions #####
<> 144:ef7eb2e8f9f7 226 ===============================================================================
<> 144:ef7eb2e8f9f7 227 [..] This section provides functions allowing to:
<> 144:ef7eb2e8f9f7 228 (+) Get the 32 bit Random number
<> 144:ef7eb2e8f9f7 229 (+) Get the 32 bit Random number with interrupt enabled
<> 144:ef7eb2e8f9f7 230 (+) Handle RNG interrupt request
<> 144:ef7eb2e8f9f7 231
<> 144:ef7eb2e8f9f7 232
<> 144:ef7eb2e8f9f7 233 @endverbatim
<> 144:ef7eb2e8f9f7 234 * @{
<> 144:ef7eb2e8f9f7 235 */
<> 144:ef7eb2e8f9f7 236
<> 144:ef7eb2e8f9f7 237 /**
<> 144:ef7eb2e8f9f7 238 * @brief Generates a 32-bit random number.
<> 144:ef7eb2e8f9f7 239 * @note Each time the random number data is read the RNG_FLAG_DRDY flag
<> 144:ef7eb2e8f9f7 240 * is automatically cleared.
<> 144:ef7eb2e8f9f7 241 * @param hrng: pointer to a RNG_HandleTypeDef structure.
<> 144:ef7eb2e8f9f7 242 * @param random32bit: pointer to generated random number variable if successful.
<> 144:ef7eb2e8f9f7 243 * @retval HAL status
<> 144:ef7eb2e8f9f7 244 */
<> 144:ef7eb2e8f9f7 245
<> 144:ef7eb2e8f9f7 246 HAL_StatusTypeDef HAL_RNG_GenerateRandomNumber(RNG_HandleTypeDef *hrng, uint32_t *random32bit)
<> 144:ef7eb2e8f9f7 247 {
<> 151:5eaa88a5bcc7 248 uint32_t tickstart = 0U;
<> 144:ef7eb2e8f9f7 249 HAL_StatusTypeDef status = HAL_OK;
<> 144:ef7eb2e8f9f7 250
<> 144:ef7eb2e8f9f7 251 /* Process Locked */
<> 144:ef7eb2e8f9f7 252 __HAL_LOCK(hrng);
<> 144:ef7eb2e8f9f7 253
<> 144:ef7eb2e8f9f7 254 /* Check RNG peripheral state */
<> 144:ef7eb2e8f9f7 255 if(hrng->State == HAL_RNG_STATE_READY)
<> 144:ef7eb2e8f9f7 256 {
<> 144:ef7eb2e8f9f7 257 /* Change RNG peripheral state */
<> 144:ef7eb2e8f9f7 258 hrng->State = HAL_RNG_STATE_BUSY;
<> 144:ef7eb2e8f9f7 259
<> 144:ef7eb2e8f9f7 260 /* Get tick */
<> 144:ef7eb2e8f9f7 261 tickstart = HAL_GetTick();
<> 144:ef7eb2e8f9f7 262
<> 144:ef7eb2e8f9f7 263 /* Check if data register contains valid random data */
<> 144:ef7eb2e8f9f7 264 while(__HAL_RNG_GET_FLAG(hrng, RNG_FLAG_DRDY) == RESET)
<> 144:ef7eb2e8f9f7 265 {
<> 144:ef7eb2e8f9f7 266 if((HAL_GetTick() - tickstart ) > RNG_TIMEOUT_VALUE)
<> 144:ef7eb2e8f9f7 267 {
<> 144:ef7eb2e8f9f7 268 hrng->State = HAL_RNG_STATE_ERROR;
<> 144:ef7eb2e8f9f7 269
<> 144:ef7eb2e8f9f7 270 /* Process Unlocked */
<> 144:ef7eb2e8f9f7 271 __HAL_UNLOCK(hrng);
<> 144:ef7eb2e8f9f7 272
<> 144:ef7eb2e8f9f7 273 return HAL_TIMEOUT;
<> 144:ef7eb2e8f9f7 274 }
<> 144:ef7eb2e8f9f7 275 }
<> 144:ef7eb2e8f9f7 276
<> 144:ef7eb2e8f9f7 277 /* Get a 32bit Random number */
<> 144:ef7eb2e8f9f7 278 hrng->RandomNumber = hrng->Instance->DR;
<> 144:ef7eb2e8f9f7 279 *random32bit = hrng->RandomNumber;
<> 144:ef7eb2e8f9f7 280
<> 144:ef7eb2e8f9f7 281 hrng->State = HAL_RNG_STATE_READY;
<> 144:ef7eb2e8f9f7 282 }
<> 144:ef7eb2e8f9f7 283 else
<> 144:ef7eb2e8f9f7 284 {
<> 144:ef7eb2e8f9f7 285 status = HAL_ERROR;
<> 144:ef7eb2e8f9f7 286 }
<> 144:ef7eb2e8f9f7 287
<> 144:ef7eb2e8f9f7 288 /* Process Unlocked */
<> 144:ef7eb2e8f9f7 289 __HAL_UNLOCK(hrng);
<> 144:ef7eb2e8f9f7 290
<> 144:ef7eb2e8f9f7 291 return status;
<> 144:ef7eb2e8f9f7 292 }
<> 144:ef7eb2e8f9f7 293
<> 144:ef7eb2e8f9f7 294 /**
<> 144:ef7eb2e8f9f7 295 * @brief Generates a 32-bit random number in interrupt mode.
<> 144:ef7eb2e8f9f7 296 * @param hrng: pointer to a RNG_HandleTypeDef structure.
<> 144:ef7eb2e8f9f7 297 * @retval HAL status
<> 144:ef7eb2e8f9f7 298 */
<> 144:ef7eb2e8f9f7 299 HAL_StatusTypeDef HAL_RNG_GenerateRandomNumber_IT(RNG_HandleTypeDef *hrng)
<> 144:ef7eb2e8f9f7 300 {
<> 144:ef7eb2e8f9f7 301 HAL_StatusTypeDef status = HAL_OK;
<> 144:ef7eb2e8f9f7 302
<> 144:ef7eb2e8f9f7 303 /* Process Locked */
<> 144:ef7eb2e8f9f7 304 __HAL_LOCK(hrng);
<> 144:ef7eb2e8f9f7 305
<> 144:ef7eb2e8f9f7 306 /* Check RNG peripheral state */
<> 144:ef7eb2e8f9f7 307 if(hrng->State == HAL_RNG_STATE_READY)
<> 144:ef7eb2e8f9f7 308 {
<> 144:ef7eb2e8f9f7 309 /* Change RNG peripheral state */
<> 144:ef7eb2e8f9f7 310 hrng->State = HAL_RNG_STATE_BUSY;
<> 144:ef7eb2e8f9f7 311
<> 144:ef7eb2e8f9f7 312 /* Process Unlocked */
<> 144:ef7eb2e8f9f7 313 __HAL_UNLOCK(hrng);
<> 144:ef7eb2e8f9f7 314
<> 144:ef7eb2e8f9f7 315 /* Enable the RNG Interrupts: Data Ready, Clock error, Seed error */
<> 144:ef7eb2e8f9f7 316 __HAL_RNG_ENABLE_IT(hrng);
<> 144:ef7eb2e8f9f7 317 }
<> 144:ef7eb2e8f9f7 318 else
<> 144:ef7eb2e8f9f7 319 {
<> 144:ef7eb2e8f9f7 320 /* Process Unlocked */
<> 144:ef7eb2e8f9f7 321 __HAL_UNLOCK(hrng);
<> 144:ef7eb2e8f9f7 322
<> 144:ef7eb2e8f9f7 323 status = HAL_ERROR;
<> 144:ef7eb2e8f9f7 324 }
<> 144:ef7eb2e8f9f7 325
<> 144:ef7eb2e8f9f7 326 return status;
<> 144:ef7eb2e8f9f7 327 }
<> 144:ef7eb2e8f9f7 328
<> 144:ef7eb2e8f9f7 329 /**
<> 144:ef7eb2e8f9f7 330 * @brief Handles RNG interrupt request.
<> 144:ef7eb2e8f9f7 331 * @note In the case of a clock error, the RNG is no more able to generate
<> 144:ef7eb2e8f9f7 332 * random numbers because the PLL48CLK clock is not correct. User has
<> 144:ef7eb2e8f9f7 333 * to check that the clock controller is correctly configured to provide
<> 144:ef7eb2e8f9f7 334 * the RNG clock and clear the CEIS bit using __HAL_RNG_CLEAR_IT().
<> 144:ef7eb2e8f9f7 335 * The clock error has no impact on the previously generated
<> 144:ef7eb2e8f9f7 336 * random numbers, and the RNG_DR register contents can be used.
<> 144:ef7eb2e8f9f7 337 * @note In the case of a seed error, the generation of random numbers is
<> 144:ef7eb2e8f9f7 338 * interrupted as long as the SECS bit is '1'. If a number is
<> 144:ef7eb2e8f9f7 339 * available in the RNG_DR register, it must not be used because it may
<> 144:ef7eb2e8f9f7 340 * not have enough entropy. In this case, it is recommended to clear the
<> 144:ef7eb2e8f9f7 341 * SEIS bit using __HAL_RNG_CLEAR_IT(), then disable and enable
<> 144:ef7eb2e8f9f7 342 * the RNG peripheral to reinitialize and restart the RNG.
<> 144:ef7eb2e8f9f7 343 * @note User-written HAL_RNG_ErrorCallback() API is called once whether SEIS
<> 144:ef7eb2e8f9f7 344 * or CEIS are set.
<> 144:ef7eb2e8f9f7 345 * @param hrng: pointer to a RNG_HandleTypeDef structure.
<> 144:ef7eb2e8f9f7 346 * @retval None
<> 144:ef7eb2e8f9f7 347
<> 144:ef7eb2e8f9f7 348 */
<> 144:ef7eb2e8f9f7 349 void HAL_RNG_IRQHandler(RNG_HandleTypeDef *hrng)
<> 144:ef7eb2e8f9f7 350 {
<> 144:ef7eb2e8f9f7 351 /* RNG clock error interrupt occurred */
<> 144:ef7eb2e8f9f7 352 if((__HAL_RNG_GET_IT(hrng, RNG_IT_CEI) != RESET) || (__HAL_RNG_GET_IT(hrng, RNG_IT_SEI) != RESET))
<> 144:ef7eb2e8f9f7 353 {
<> 144:ef7eb2e8f9f7 354 /* Change RNG peripheral state */
<> 144:ef7eb2e8f9f7 355 hrng->State = HAL_RNG_STATE_ERROR;
<> 144:ef7eb2e8f9f7 356
<> 144:ef7eb2e8f9f7 357 HAL_RNG_ErrorCallback(hrng);
<> 144:ef7eb2e8f9f7 358
<> 144:ef7eb2e8f9f7 359 /* Clear the clock error flag */
<> 144:ef7eb2e8f9f7 360 __HAL_RNG_CLEAR_IT(hrng, RNG_IT_CEI|RNG_IT_SEI);
<> 144:ef7eb2e8f9f7 361
<> 144:ef7eb2e8f9f7 362 }
<> 144:ef7eb2e8f9f7 363
<> 144:ef7eb2e8f9f7 364 /* Check RNG data ready interrupt occurred */
<> 144:ef7eb2e8f9f7 365 if(__HAL_RNG_GET_IT(hrng, RNG_IT_DRDY) != RESET)
<> 144:ef7eb2e8f9f7 366 {
<> 144:ef7eb2e8f9f7 367 /* Generate random number once, so disable the IT */
<> 144:ef7eb2e8f9f7 368 __HAL_RNG_DISABLE_IT(hrng);
<> 144:ef7eb2e8f9f7 369
<> 144:ef7eb2e8f9f7 370 /* Get the 32bit Random number (DRDY flag automatically cleared) */
<> 144:ef7eb2e8f9f7 371 hrng->RandomNumber = hrng->Instance->DR;
<> 144:ef7eb2e8f9f7 372
<> 144:ef7eb2e8f9f7 373 if(hrng->State != HAL_RNG_STATE_ERROR)
<> 144:ef7eb2e8f9f7 374 {
<> 144:ef7eb2e8f9f7 375 /* Change RNG peripheral state */
<> 144:ef7eb2e8f9f7 376 hrng->State = HAL_RNG_STATE_READY;
<> 144:ef7eb2e8f9f7 377
<> 144:ef7eb2e8f9f7 378 /* Data Ready callback */
<> 144:ef7eb2e8f9f7 379 HAL_RNG_ReadyDataCallback(hrng, hrng->RandomNumber);
<> 144:ef7eb2e8f9f7 380 }
<> 144:ef7eb2e8f9f7 381 }
<> 144:ef7eb2e8f9f7 382 }
<> 144:ef7eb2e8f9f7 383
<> 144:ef7eb2e8f9f7 384 /**
<> 144:ef7eb2e8f9f7 385 * @brief return generated random number in polling mode (Obsolete).
<> 144:ef7eb2e8f9f7 386 * Use HAL_RNG_GenerateRandomNumber() API instead.
<> 144:ef7eb2e8f9f7 387 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
<> 144:ef7eb2e8f9f7 388 * the configuration information for RNG.
<> 144:ef7eb2e8f9f7 389 * @retval random value
<> 144:ef7eb2e8f9f7 390 */
<> 144:ef7eb2e8f9f7 391 uint32_t HAL_RNG_GetRandomNumber(RNG_HandleTypeDef *hrng)
<> 144:ef7eb2e8f9f7 392 {
<> 144:ef7eb2e8f9f7 393 if(HAL_RNG_GenerateRandomNumber(hrng, &(hrng->RandomNumber)) == HAL_OK)
<> 144:ef7eb2e8f9f7 394 {
<> 144:ef7eb2e8f9f7 395 return hrng->RandomNumber;
<> 144:ef7eb2e8f9f7 396 }
<> 144:ef7eb2e8f9f7 397 else
<> 144:ef7eb2e8f9f7 398 {
<> 151:5eaa88a5bcc7 399 return 0U;
<> 144:ef7eb2e8f9f7 400 }
<> 144:ef7eb2e8f9f7 401 }
<> 144:ef7eb2e8f9f7 402
<> 144:ef7eb2e8f9f7 403
<> 144:ef7eb2e8f9f7 404 /**
<> 144:ef7eb2e8f9f7 405 * @brief Returns a 32-bit random number with interrupt enabled (Obsolete),
<> 144:ef7eb2e8f9f7 406 * Use HAL_RNG_GenerateRandomNumber_IT() API instead.
<> 144:ef7eb2e8f9f7 407 * @param hrng: RNG handle
<> 144:ef7eb2e8f9f7 408 * @retval 32-bit random number
<> 144:ef7eb2e8f9f7 409 */
<> 144:ef7eb2e8f9f7 410 uint32_t HAL_RNG_GetRandomNumber_IT(RNG_HandleTypeDef *hrng)
<> 144:ef7eb2e8f9f7 411 {
<> 151:5eaa88a5bcc7 412 uint32_t random32bit = 0U;
<> 144:ef7eb2e8f9f7 413
<> 144:ef7eb2e8f9f7 414 /* Process locked */
<> 144:ef7eb2e8f9f7 415 __HAL_LOCK(hrng);
<> 144:ef7eb2e8f9f7 416
<> 144:ef7eb2e8f9f7 417 /* Change RNG peripheral state */
<> 144:ef7eb2e8f9f7 418 hrng->State = HAL_RNG_STATE_BUSY;
<> 144:ef7eb2e8f9f7 419
<> 144:ef7eb2e8f9f7 420 /* Get a 32bit Random number */
<> 144:ef7eb2e8f9f7 421 random32bit = hrng->Instance->DR;
<> 144:ef7eb2e8f9f7 422
<> 144:ef7eb2e8f9f7 423 /* Enable the RNG Interrupts: Data Ready, Clock error, Seed error */
<> 144:ef7eb2e8f9f7 424 __HAL_RNG_ENABLE_IT(hrng);
<> 144:ef7eb2e8f9f7 425
<> 144:ef7eb2e8f9f7 426 /* Return the 32 bit random number */
<> 144:ef7eb2e8f9f7 427 return random32bit;
<> 144:ef7eb2e8f9f7 428 }
<> 144:ef7eb2e8f9f7 429
<> 144:ef7eb2e8f9f7 430
<> 144:ef7eb2e8f9f7 431
<> 144:ef7eb2e8f9f7 432 /**
<> 144:ef7eb2e8f9f7 433 * @brief Read latest generated random number.
<> 144:ef7eb2e8f9f7 434 * @param hrng: pointer to a RNG_HandleTypeDef structure.
<> 144:ef7eb2e8f9f7 435 * @retval random value
<> 144:ef7eb2e8f9f7 436 */
<> 144:ef7eb2e8f9f7 437 uint32_t HAL_RNG_ReadLastRandomNumber(RNG_HandleTypeDef *hrng)
<> 144:ef7eb2e8f9f7 438 {
<> 144:ef7eb2e8f9f7 439 return(hrng->RandomNumber);
<> 144:ef7eb2e8f9f7 440 }
<> 144:ef7eb2e8f9f7 441
<> 144:ef7eb2e8f9f7 442 /**
<> 144:ef7eb2e8f9f7 443 * @brief Data Ready callback in non-blocking mode.
<> 144:ef7eb2e8f9f7 444 * @param hrng: pointer to a RNG_HandleTypeDef structure..
<> 144:ef7eb2e8f9f7 445 * @param random32bit: generated random value
<> 144:ef7eb2e8f9f7 446 * @retval None
<> 144:ef7eb2e8f9f7 447 */
<> 144:ef7eb2e8f9f7 448 __weak void HAL_RNG_ReadyDataCallback(RNG_HandleTypeDef *hrng, uint32_t random32bit)
<> 144:ef7eb2e8f9f7 449 {
<> 144:ef7eb2e8f9f7 450 /* Prevent unused argument(s) compilation warning */
<> 144:ef7eb2e8f9f7 451 UNUSED(hrng);
<> 144:ef7eb2e8f9f7 452
<> 144:ef7eb2e8f9f7 453 /* NOTE : This function should not be modified. When the callback is needed,
<> 144:ef7eb2e8f9f7 454 function HAL_RNG_ReadyDataCallback must be implemented in the user file.
<> 144:ef7eb2e8f9f7 455 */
<> 144:ef7eb2e8f9f7 456 }
<> 144:ef7eb2e8f9f7 457
<> 144:ef7eb2e8f9f7 458 /**
<> 144:ef7eb2e8f9f7 459 * @brief RNG error callbacks.
<> 144:ef7eb2e8f9f7 460 * @param hrng: pointer to a RNG_HandleTypeDef structure.
<> 144:ef7eb2e8f9f7 461 * @retval None
<> 144:ef7eb2e8f9f7 462 */
<> 144:ef7eb2e8f9f7 463 __weak void HAL_RNG_ErrorCallback(RNG_HandleTypeDef *hrng)
<> 144:ef7eb2e8f9f7 464 {
<> 144:ef7eb2e8f9f7 465 /* Prevent unused argument(s) compilation warning */
<> 144:ef7eb2e8f9f7 466 UNUSED(hrng);
<> 144:ef7eb2e8f9f7 467
<> 144:ef7eb2e8f9f7 468 /* NOTE : This function should not be modified. When the callback is needed,
<> 144:ef7eb2e8f9f7 469 function HAL_RNG_ErrorCallback must be implemented in the user file.
<> 144:ef7eb2e8f9f7 470 */
<> 144:ef7eb2e8f9f7 471 }
<> 144:ef7eb2e8f9f7 472
<> 144:ef7eb2e8f9f7 473 /**
<> 144:ef7eb2e8f9f7 474 * @}
<> 144:ef7eb2e8f9f7 475 */
<> 144:ef7eb2e8f9f7 476
<> 144:ef7eb2e8f9f7 477 /** @addtogroup RNG_Exported_Functions_Group3
<> 144:ef7eb2e8f9f7 478 * @brief Peripheral State functions.
<> 144:ef7eb2e8f9f7 479 *
<> 144:ef7eb2e8f9f7 480 @verbatim
<> 144:ef7eb2e8f9f7 481 ===============================================================================
<> 144:ef7eb2e8f9f7 482 ##### Peripheral State functions #####
<> 144:ef7eb2e8f9f7 483 ===============================================================================
<> 144:ef7eb2e8f9f7 484 [..]
<> 144:ef7eb2e8f9f7 485 This subsection permits to get in run-time the status of the peripheral.
<> 144:ef7eb2e8f9f7 486
<> 144:ef7eb2e8f9f7 487 @endverbatim
<> 144:ef7eb2e8f9f7 488 * @{
<> 144:ef7eb2e8f9f7 489 */
<> 144:ef7eb2e8f9f7 490
<> 144:ef7eb2e8f9f7 491 /**
<> 144:ef7eb2e8f9f7 492 * @brief Returns the RNG state.
<> 144:ef7eb2e8f9f7 493 * @param hrng: pointer to a RNG_HandleTypeDef structure.
<> 144:ef7eb2e8f9f7 494 * @retval HAL state
<> 144:ef7eb2e8f9f7 495 */
<> 144:ef7eb2e8f9f7 496 HAL_RNG_StateTypeDef HAL_RNG_GetState(RNG_HandleTypeDef *hrng)
<> 144:ef7eb2e8f9f7 497 {
<> 144:ef7eb2e8f9f7 498 return hrng->State;
<> 144:ef7eb2e8f9f7 499 }
<> 144:ef7eb2e8f9f7 500
<> 144:ef7eb2e8f9f7 501 /**
<> 144:ef7eb2e8f9f7 502 * @}
<> 144:ef7eb2e8f9f7 503 */
<> 144:ef7eb2e8f9f7 504
<> 144:ef7eb2e8f9f7 505 /**
<> 144:ef7eb2e8f9f7 506 * @}
<> 144:ef7eb2e8f9f7 507 */
<> 144:ef7eb2e8f9f7 508
<> 144:ef7eb2e8f9f7 509 /**
<> 144:ef7eb2e8f9f7 510 * @}
<> 144:ef7eb2e8f9f7 511 */
<> 144:ef7eb2e8f9f7 512
<> 144:ef7eb2e8f9f7 513 #endif /* if defined (STM32L052xx) || defined (STM32L053xx) || defined (STM32L062xx) || defined (STM32L063xx) || \
<> 144:ef7eb2e8f9f7 514 defined (STM32L072xx) || defined (STM32L073xx) || defined (STM32L082xx) || defined (STM32L083xx) */
<> 144:ef7eb2e8f9f7 515
<> 144:ef7eb2e8f9f7 516 #endif /* HAL_RNG_MODULE_ENABLED */
<> 144:ef7eb2e8f9f7 517
<> 144:ef7eb2e8f9f7 518
<> 144:ef7eb2e8f9f7 519
<> 144:ef7eb2e8f9f7 520 /**
<> 144:ef7eb2e8f9f7 521 * @}
<> 144:ef7eb2e8f9f7 522 */
<> 144:ef7eb2e8f9f7 523
<> 144:ef7eb2e8f9f7 524 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
<> 144:ef7eb2e8f9f7 525