mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

Dependents:   Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more

targets/TARGET_STM/TARGET_STM32L0/device/stm32l0xx_hal_rng.c@189:f392fc9709a3, 2019-02-20 (annotated)

Committer:
AnnaBridge
Date:
Wed Feb 20 22:31:08 2019 +0000
Revision:
189:f392fc9709a3
Parent:
186:707f6e361f3e 
mbed library release version 165

Who changed what in which revision?

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