Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

targets/cmsis/TARGET_STM/TARGET_STM32F2/stm32f2xx_hal_rng.c@147:ba84b7dc41a7, 2016-09-10 (annotated)

Committer:
JojoS
Date:
Sat Sep 10 15:32:04 2016 +0000
Revision:
147:ba84b7dc41a7
Parent:
144:ef7eb2e8f9f7 
added prescaler for 16 bit timers (solution as in LPC11xx), default prescaler 31 for max 28 ms period time

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /**
<> 144:ef7eb2e8f9f7 2 ******************************************************************************
<> 144:ef7eb2e8f9f7 3 * @file stm32f2xx_hal_rng.c
<> 144:ef7eb2e8f9f7 4 * @author MCD Application Team
<> 144:ef7eb2e8f9f7 5 * @version V1.1.3
<> 144:ef7eb2e8f9f7 6 * @date 29-June-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 "stm32f2xx_hal.h"
<> 144:ef7eb2e8f9f7 61
<> 144:ef7eb2e8f9f7 62 /** @addtogroup STM32F2xx_HAL_Driver
<> 144:ef7eb2e8f9f7 63 * @{
<> 144:ef7eb2e8f9f7 64 */
<> 144:ef7eb2e8f9f7 65
<> 144:ef7eb2e8f9f7 66 /** @addtogroup RNG
<> 144:ef7eb2e8f9f7 67 * @{
<> 144:ef7eb2e8f9f7 68 */
<> 144:ef7eb2e8f9f7 69
<> 144:ef7eb2e8f9f7 70 #ifdef HAL_RNG_MODULE_ENABLED
<> 144:ef7eb2e8f9f7 71
<> 144:ef7eb2e8f9f7 72
<> 144:ef7eb2e8f9f7 73 /* Private types -------------------------------------------------------------*/
<> 144:ef7eb2e8f9f7 74 /* Private defines -----------------------------------------------------------*/
<> 144:ef7eb2e8f9f7 75 /* Private variables ---------------------------------------------------------*/
<> 144:ef7eb2e8f9f7 76 /* Private constants ---------------------------------------------------------*/
<> 144:ef7eb2e8f9f7 77 /** @addtogroup RNG_Private_Constants
<> 144:ef7eb2e8f9f7 78 * @{
<> 144:ef7eb2e8f9f7 79 */
<> 144:ef7eb2e8f9f7 80 #define RNG_TIMEOUT_VALUE 2U
<> 144:ef7eb2e8f9f7 81 /**
<> 144:ef7eb2e8f9f7 82 * @}
<> 144:ef7eb2e8f9f7 83 */
<> 144:ef7eb2e8f9f7 84 /* Private macros ------------------------------------------------------------*/
<> 144:ef7eb2e8f9f7 85 /* Private functions prototypes ----------------------------------------------*/
<> 144:ef7eb2e8f9f7 86 /* Private functions ---------------------------------------------------------*/
<> 144:ef7eb2e8f9f7 87 /* Exported functions --------------------------------------------------------*/
<> 144:ef7eb2e8f9f7 88
<> 144:ef7eb2e8f9f7 89 /** @addtogroup RNG_Exported_Functions
<> 144:ef7eb2e8f9f7 90 * @{
<> 144:ef7eb2e8f9f7 91 */
<> 144:ef7eb2e8f9f7 92
<> 144:ef7eb2e8f9f7 93 /** @addtogroup RNG_Exported_Functions_Group1
<> 144:ef7eb2e8f9f7 94 * @brief Initialization and de-initialization functions
<> 144:ef7eb2e8f9f7 95 *
<> 144:ef7eb2e8f9f7 96 @verbatim
<> 144:ef7eb2e8f9f7 97 ===============================================================================
<> 144:ef7eb2e8f9f7 98 ##### Initialization and de-initialization functions #####
<> 144:ef7eb2e8f9f7 99 ===============================================================================
<> 144:ef7eb2e8f9f7 100 [..] This section provides functions allowing to:
<> 144:ef7eb2e8f9f7 101 (+) Initialize the RNG according to the specified parameters
<> 144:ef7eb2e8f9f7 102 in the RNG_InitTypeDef and create the associated handle
<> 144:ef7eb2e8f9f7 103 (+) DeInitialize the RNG peripheral
<> 144:ef7eb2e8f9f7 104 (+) Initialize the RNG MSP
<> 144:ef7eb2e8f9f7 105 (+) DeInitialize RNG MSP
<> 144:ef7eb2e8f9f7 106
<> 144:ef7eb2e8f9f7 107 @endverbatim
<> 144:ef7eb2e8f9f7 108 * @{
<> 144:ef7eb2e8f9f7 109 */
<> 144:ef7eb2e8f9f7 110
<> 144:ef7eb2e8f9f7 111 /**
<> 144:ef7eb2e8f9f7 112 * @brief Initializes the RNG peripheral and creates the associated handle.
<> 144:ef7eb2e8f9f7 113 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
<> 144:ef7eb2e8f9f7 114 * the configuration information for RNG.
<> 144:ef7eb2e8f9f7 115 * @retval HAL status
<> 144:ef7eb2e8f9f7 116 */
<> 144:ef7eb2e8f9f7 117 HAL_StatusTypeDef HAL_RNG_Init(RNG_HandleTypeDef *hrng)
<> 144:ef7eb2e8f9f7 118 {
<> 144:ef7eb2e8f9f7 119 /* Check the RNG handle allocation */
<> 144:ef7eb2e8f9f7 120 if(hrng == NULL)
<> 144:ef7eb2e8f9f7 121 {
<> 144:ef7eb2e8f9f7 122 return HAL_ERROR;
<> 144:ef7eb2e8f9f7 123 }
<> 144:ef7eb2e8f9f7 124
<> 144:ef7eb2e8f9f7 125 __HAL_LOCK(hrng);
<> 144:ef7eb2e8f9f7 126
<> 144:ef7eb2e8f9f7 127 if(hrng->State == HAL_RNG_STATE_RESET)
<> 144:ef7eb2e8f9f7 128 {
<> 144:ef7eb2e8f9f7 129 /* Allocate lock resource and initialize it */
<> 144:ef7eb2e8f9f7 130 hrng->Lock = HAL_UNLOCKED;
<> 144:ef7eb2e8f9f7 131 /* Init the low level hardware */
<> 144:ef7eb2e8f9f7 132 HAL_RNG_MspInit(hrng);
<> 144:ef7eb2e8f9f7 133 }
<> 144:ef7eb2e8f9f7 134
<> 144:ef7eb2e8f9f7 135 /* Change RNG peripheral state */
<> 144:ef7eb2e8f9f7 136 hrng->State = HAL_RNG_STATE_BUSY;
<> 144:ef7eb2e8f9f7 137
<> 144:ef7eb2e8f9f7 138 /* Enable the RNG Peripheral */
<> 144:ef7eb2e8f9f7 139 __HAL_RNG_ENABLE(hrng);
<> 144:ef7eb2e8f9f7 140
<> 144:ef7eb2e8f9f7 141 /* Initialize the RNG state */
<> 144:ef7eb2e8f9f7 142 hrng->State = HAL_RNG_STATE_READY;
<> 144:ef7eb2e8f9f7 143
<> 144:ef7eb2e8f9f7 144 __HAL_UNLOCK(hrng);
<> 144:ef7eb2e8f9f7 145
<> 144:ef7eb2e8f9f7 146 /* Return function status */
<> 144:ef7eb2e8f9f7 147 return HAL_OK;
<> 144:ef7eb2e8f9f7 148 }
<> 144:ef7eb2e8f9f7 149
<> 144:ef7eb2e8f9f7 150 /**
<> 144:ef7eb2e8f9f7 151 * @brief DeInitializes the RNG peripheral.
<> 144:ef7eb2e8f9f7 152 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
<> 144:ef7eb2e8f9f7 153 * the configuration information for RNG.
<> 144:ef7eb2e8f9f7 154 * @retval HAL status
<> 144:ef7eb2e8f9f7 155 */
<> 144:ef7eb2e8f9f7 156 HAL_StatusTypeDef HAL_RNG_DeInit(RNG_HandleTypeDef *hrng)
<> 144:ef7eb2e8f9f7 157 {
<> 144:ef7eb2e8f9f7 158 /* Check the RNG handle allocation */
<> 144:ef7eb2e8f9f7 159 if(hrng == NULL)
<> 144:ef7eb2e8f9f7 160 {
<> 144:ef7eb2e8f9f7 161 return HAL_ERROR;
<> 144:ef7eb2e8f9f7 162 }
<> 144:ef7eb2e8f9f7 163 /* Disable the RNG Peripheral */
<> 144:ef7eb2e8f9f7 164 CLEAR_BIT(hrng->Instance->CR, RNG_CR_IE | RNG_CR_RNGEN);
<> 144:ef7eb2e8f9f7 165
<> 144:ef7eb2e8f9f7 166 /* Clear RNG interrupt status flags */
<> 144:ef7eb2e8f9f7 167 CLEAR_BIT(hrng->Instance->SR, RNG_SR_CEIS | RNG_SR_SEIS);
<> 144:ef7eb2e8f9f7 168
<> 144:ef7eb2e8f9f7 169 /* DeInit the low level hardware */
<> 144:ef7eb2e8f9f7 170 HAL_RNG_MspDeInit(hrng);
<> 144:ef7eb2e8f9f7 171
<> 144:ef7eb2e8f9f7 172 /* Update the RNG state */
<> 144:ef7eb2e8f9f7 173 hrng->State = HAL_RNG_STATE_RESET;
<> 144:ef7eb2e8f9f7 174
<> 144:ef7eb2e8f9f7 175 /* Release Lock */
<> 144:ef7eb2e8f9f7 176 __HAL_UNLOCK(hrng);
<> 144:ef7eb2e8f9f7 177
<> 144:ef7eb2e8f9f7 178 /* Return the function status */
<> 144:ef7eb2e8f9f7 179 return HAL_OK;
<> 144:ef7eb2e8f9f7 180 }
<> 144:ef7eb2e8f9f7 181
<> 144:ef7eb2e8f9f7 182 /**
<> 144:ef7eb2e8f9f7 183 * @brief Initializes the RNG MSP.
<> 144:ef7eb2e8f9f7 184 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
<> 144:ef7eb2e8f9f7 185 * the configuration information for RNG.
<> 144:ef7eb2e8f9f7 186 * @retval None
<> 144:ef7eb2e8f9f7 187 */
<> 144:ef7eb2e8f9f7 188 __weak void HAL_RNG_MspInit(RNG_HandleTypeDef *hrng)
<> 144:ef7eb2e8f9f7 189 {
<> 144:ef7eb2e8f9f7 190 /* Prevent unused argument(s) compilation warning */
<> 144:ef7eb2e8f9f7 191 UNUSED(hrng);
<> 144:ef7eb2e8f9f7 192 /* NOTE : This function should not be modified. When the callback is needed,
<> 144:ef7eb2e8f9f7 193 function HAL_RNG_MspInit must be implemented in the user file.
<> 144:ef7eb2e8f9f7 194 */
<> 144:ef7eb2e8f9f7 195 }
<> 144:ef7eb2e8f9f7 196
<> 144:ef7eb2e8f9f7 197 /**
<> 144:ef7eb2e8f9f7 198 * @brief DeInitializes the RNG MSP.
<> 144:ef7eb2e8f9f7 199 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
<> 144:ef7eb2e8f9f7 200 * the configuration information for RNG.
<> 144:ef7eb2e8f9f7 201 * @retval None
<> 144:ef7eb2e8f9f7 202 */
<> 144:ef7eb2e8f9f7 203 __weak void HAL_RNG_MspDeInit(RNG_HandleTypeDef *hrng)
<> 144:ef7eb2e8f9f7 204 {
<> 144:ef7eb2e8f9f7 205 /* Prevent unused argument(s) compilation warning */
<> 144:ef7eb2e8f9f7 206 UNUSED(hrng);
<> 144:ef7eb2e8f9f7 207 /* NOTE : This function should not be modified. When the callback is needed,
<> 144:ef7eb2e8f9f7 208 function HAL_RNG_MspDeInit must be implemented in the user file.
<> 144:ef7eb2e8f9f7 209 */
<> 144:ef7eb2e8f9f7 210 }
<> 144:ef7eb2e8f9f7 211
<> 144:ef7eb2e8f9f7 212 /**
<> 144:ef7eb2e8f9f7 213 * @}
<> 144:ef7eb2e8f9f7 214 */
<> 144:ef7eb2e8f9f7 215
<> 144:ef7eb2e8f9f7 216 /** @addtogroup RNG_Exported_Functions_Group2
<> 144:ef7eb2e8f9f7 217 * @brief Peripheral Control functions
<> 144:ef7eb2e8f9f7 218 *
<> 144:ef7eb2e8f9f7 219 @verbatim
<> 144:ef7eb2e8f9f7 220 ===============================================================================
<> 144:ef7eb2e8f9f7 221 ##### Peripheral Control functions #####
<> 144:ef7eb2e8f9f7 222 ===============================================================================
<> 144:ef7eb2e8f9f7 223 [..] This section provides functions allowing to:
<> 144:ef7eb2e8f9f7 224 (+) Get the 32 bit Random number
<> 144:ef7eb2e8f9f7 225 (+) Get the 32 bit Random number with interrupt enabled
<> 144:ef7eb2e8f9f7 226 (+) Handle RNG interrupt request
<> 144:ef7eb2e8f9f7 227
<> 144:ef7eb2e8f9f7 228 @endverbatim
<> 144:ef7eb2e8f9f7 229 * @{
<> 144:ef7eb2e8f9f7 230 */
<> 144:ef7eb2e8f9f7 231
<> 144:ef7eb2e8f9f7 232 /**
<> 144:ef7eb2e8f9f7 233 * @brief Generates a 32-bit random number.
<> 144:ef7eb2e8f9f7 234 * @note Each time the random number data is read the RNG_FLAG_DRDY flag
<> 144:ef7eb2e8f9f7 235 * is automatically cleared.
<> 144:ef7eb2e8f9f7 236 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
<> 144:ef7eb2e8f9f7 237 * the configuration information for RNG.
<> 144:ef7eb2e8f9f7 238 * @param random32bit: pointer to generated random number variable if successful.
<> 144:ef7eb2e8f9f7 239 * @retval HAL status
<> 144:ef7eb2e8f9f7 240 */
<> 144:ef7eb2e8f9f7 241
<> 144:ef7eb2e8f9f7 242 HAL_StatusTypeDef HAL_RNG_GenerateRandomNumber(RNG_HandleTypeDef *hrng, uint32_t *random32bit)
<> 144:ef7eb2e8f9f7 243 {
<> 144:ef7eb2e8f9f7 244 uint32_t tickstart = 0U;
<> 144:ef7eb2e8f9f7 245 HAL_StatusTypeDef status = HAL_OK;
<> 144:ef7eb2e8f9f7 246
<> 144:ef7eb2e8f9f7 247 /* Process Locked */
<> 144:ef7eb2e8f9f7 248 __HAL_LOCK(hrng);
<> 144:ef7eb2e8f9f7 249
<> 144:ef7eb2e8f9f7 250 /* Check RNG peripheral state */
<> 144:ef7eb2e8f9f7 251 if(hrng->State == HAL_RNG_STATE_READY)
<> 144:ef7eb2e8f9f7 252 {
<> 144:ef7eb2e8f9f7 253 /* Change RNG peripheral state */
<> 144:ef7eb2e8f9f7 254 hrng->State = HAL_RNG_STATE_BUSY;
<> 144:ef7eb2e8f9f7 255
<> 144:ef7eb2e8f9f7 256 /* Get tick */
<> 144:ef7eb2e8f9f7 257 tickstart = HAL_GetTick();
<> 144:ef7eb2e8f9f7 258
<> 144:ef7eb2e8f9f7 259 /* Check if data register contains valid random data */
<> 144:ef7eb2e8f9f7 260 while(__HAL_RNG_GET_FLAG(hrng, RNG_FLAG_DRDY) == RESET)
<> 144:ef7eb2e8f9f7 261 {
<> 144:ef7eb2e8f9f7 262 if((HAL_GetTick() - tickstart ) > RNG_TIMEOUT_VALUE)
<> 144:ef7eb2e8f9f7 263 {
<> 144:ef7eb2e8f9f7 264 hrng->State = HAL_RNG_STATE_ERROR;
<> 144:ef7eb2e8f9f7 265
<> 144:ef7eb2e8f9f7 266 /* Process Unlocked */
<> 144:ef7eb2e8f9f7 267 __HAL_UNLOCK(hrng);
<> 144:ef7eb2e8f9f7 268
<> 144:ef7eb2e8f9f7 269 return HAL_TIMEOUT;
<> 144:ef7eb2e8f9f7 270 }
<> 144:ef7eb2e8f9f7 271 }
<> 144:ef7eb2e8f9f7 272
<> 144:ef7eb2e8f9f7 273 /* Get a 32bit Random number */
<> 144:ef7eb2e8f9f7 274 hrng->RandomNumber = hrng->Instance->DR;
<> 144:ef7eb2e8f9f7 275 *random32bit = hrng->RandomNumber;
<> 144:ef7eb2e8f9f7 276
<> 144:ef7eb2e8f9f7 277 hrng->State = HAL_RNG_STATE_READY;
<> 144:ef7eb2e8f9f7 278 }
<> 144:ef7eb2e8f9f7 279 else
<> 144:ef7eb2e8f9f7 280 {
<> 144:ef7eb2e8f9f7 281 status = HAL_ERROR;
<> 144:ef7eb2e8f9f7 282 }
<> 144:ef7eb2e8f9f7 283
<> 144:ef7eb2e8f9f7 284 /* Process Unlocked */
<> 144:ef7eb2e8f9f7 285 __HAL_UNLOCK(hrng);
<> 144:ef7eb2e8f9f7 286
<> 144:ef7eb2e8f9f7 287 return status;
<> 144:ef7eb2e8f9f7 288 }
<> 144:ef7eb2e8f9f7 289
<> 144:ef7eb2e8f9f7 290 /**
<> 144:ef7eb2e8f9f7 291 * @brief Generates a 32-bit random number in interrupt mode.
<> 144:ef7eb2e8f9f7 292 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
<> 144:ef7eb2e8f9f7 293 * the configuration information for RNG.
<> 144:ef7eb2e8f9f7 294 * @retval HAL status
<> 144:ef7eb2e8f9f7 295 */
<> 144:ef7eb2e8f9f7 296 HAL_StatusTypeDef HAL_RNG_GenerateRandomNumber_IT(RNG_HandleTypeDef *hrng)
<> 144:ef7eb2e8f9f7 297 {
<> 144:ef7eb2e8f9f7 298 HAL_StatusTypeDef status = HAL_OK;
<> 144:ef7eb2e8f9f7 299
<> 144:ef7eb2e8f9f7 300 /* Process Locked */
<> 144:ef7eb2e8f9f7 301 __HAL_LOCK(hrng);
<> 144:ef7eb2e8f9f7 302
<> 144:ef7eb2e8f9f7 303 /* Check RNG peripheral state */
<> 144:ef7eb2e8f9f7 304 if(hrng->State == HAL_RNG_STATE_READY)
<> 144:ef7eb2e8f9f7 305 {
<> 144:ef7eb2e8f9f7 306 /* Change RNG peripheral state */
<> 144:ef7eb2e8f9f7 307 hrng->State = HAL_RNG_STATE_BUSY;
<> 144:ef7eb2e8f9f7 308
<> 144:ef7eb2e8f9f7 309 /* Process Unlocked */
<> 144:ef7eb2e8f9f7 310 __HAL_UNLOCK(hrng);
<> 144:ef7eb2e8f9f7 311
<> 144:ef7eb2e8f9f7 312 /* Enable the RNG Interrupts: Data Ready, Clock error, Seed error */
<> 144:ef7eb2e8f9f7 313 __HAL_RNG_ENABLE_IT(hrng);
<> 144:ef7eb2e8f9f7 314 }
<> 144:ef7eb2e8f9f7 315 else
<> 144:ef7eb2e8f9f7 316 {
<> 144:ef7eb2e8f9f7 317 /* Process Unlocked */
<> 144:ef7eb2e8f9f7 318 __HAL_UNLOCK(hrng);
<> 144:ef7eb2e8f9f7 319
<> 144:ef7eb2e8f9f7 320 status = HAL_ERROR;
<> 144:ef7eb2e8f9f7 321 }
<> 144:ef7eb2e8f9f7 322
<> 144:ef7eb2e8f9f7 323 return status;
<> 144:ef7eb2e8f9f7 324 }
<> 144:ef7eb2e8f9f7 325
<> 144:ef7eb2e8f9f7 326 /**
<> 144:ef7eb2e8f9f7 327 * @brief Handles RNG interrupt request.
<> 144:ef7eb2e8f9f7 328 * @note In the case of a clock error, the RNG is no more able to generate
<> 144:ef7eb2e8f9f7 329 * random numbers because the PLL48CLK clock is not correct. User has
<> 144:ef7eb2e8f9f7 330 * to check that the clock controller is correctly configured to provide
<> 144:ef7eb2e8f9f7 331 * the RNG clock and clear the CEIS bit using __HAL_RNG_CLEAR_IT().
<> 144:ef7eb2e8f9f7 332 * The clock error has no impact on the previously generated
<> 144:ef7eb2e8f9f7 333 * random numbers, and the RNG_DR register contents can be used.
<> 144:ef7eb2e8f9f7 334 * @note In the case of a seed error, the generation of random numbers is
<> 144:ef7eb2e8f9f7 335 * interrupted as long as the SECS bit is '1'. If a number is
<> 144:ef7eb2e8f9f7 336 * available in the RNG_DR register, it must not be used because it may
<> 144:ef7eb2e8f9f7 337 * not have enough entropy. In this case, it is recommended to clear the
<> 144:ef7eb2e8f9f7 338 * SEIS bit using __HAL_RNG_CLEAR_IT(), then disable and enable
<> 144:ef7eb2e8f9f7 339 * the RNG peripheral to reinitialize and restart the RNG.
<> 144:ef7eb2e8f9f7 340 * @note User-written HAL_RNG_ErrorCallback() API is called once whether SEIS
<> 144:ef7eb2e8f9f7 341 * or CEIS are set.
<> 144:ef7eb2e8f9f7 342 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
<> 144:ef7eb2e8f9f7 343 * the configuration information for RNG.
<> 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 Returns 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 {
<> 144:ef7eb2e8f9f7 397 return 0U;
<> 144:ef7eb2e8f9f7 398 }
<> 144:ef7eb2e8f9f7 399 }
<> 144:ef7eb2e8f9f7 400
<> 144:ef7eb2e8f9f7 401 /**
<> 144:ef7eb2e8f9f7 402 * @brief Returns a 32-bit random number with interrupt enabled (Obsolete),
<> 144:ef7eb2e8f9f7 403 * Use HAL_RNG_GenerateRandomNumber_IT() API instead.
<> 144:ef7eb2e8f9f7 404 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
<> 144:ef7eb2e8f9f7 405 * the configuration information for RNG.
<> 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 {
<> 144:ef7eb2e8f9f7 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 * @brief Read latest generated random number.
<> 144:ef7eb2e8f9f7 430 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
<> 144:ef7eb2e8f9f7 431 * the configuration information for RNG.
<> 144:ef7eb2e8f9f7 432 * @retval random value
<> 144:ef7eb2e8f9f7 433 */
<> 144:ef7eb2e8f9f7 434 uint32_t HAL_RNG_ReadLastRandomNumber(RNG_HandleTypeDef *hrng)
<> 144:ef7eb2e8f9f7 435 {
<> 144:ef7eb2e8f9f7 436 return(hrng->RandomNumber);
<> 144:ef7eb2e8f9f7 437 }
<> 144:ef7eb2e8f9f7 438
<> 144:ef7eb2e8f9f7 439 /**
<> 144:ef7eb2e8f9f7 440 * @brief Data Ready callback in non-blocking mode.
<> 144:ef7eb2e8f9f7 441 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
<> 144:ef7eb2e8f9f7 442 * the configuration information for RNG.
<> 144:ef7eb2e8f9f7 443 * @param random32bit: generated random number.
<> 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 UNUSED(random32bit);
<> 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 that contains
<> 144:ef7eb2e8f9f7 459 * the configuration information for RNG.
<> 144:ef7eb2e8f9f7 460 * @retval None
<> 144:ef7eb2e8f9f7 461 */
<> 144:ef7eb2e8f9f7 462 __weak void HAL_RNG_ErrorCallback(RNG_HandleTypeDef *hrng)
<> 144:ef7eb2e8f9f7 463 {
<> 144:ef7eb2e8f9f7 464 /* Prevent unused argument(s) compilation warning */
<> 144:ef7eb2e8f9f7 465 UNUSED(hrng);
<> 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 and the data flow.
<> 144:ef7eb2e8f9f7 485
<> 144:ef7eb2e8f9f7 486 @endverbatim
<> 144:ef7eb2e8f9f7 487 * @{
<> 144:ef7eb2e8f9f7 488 */
<> 144:ef7eb2e8f9f7 489
<> 144:ef7eb2e8f9f7 490 /**
<> 144:ef7eb2e8f9f7 491 * @brief Returns the RNG state.
<> 144:ef7eb2e8f9f7 492 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
<> 144:ef7eb2e8f9f7 493 * the configuration information for RNG.
<> 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 #endif /* HAL_RNG_MODULE_ENABLED */
<> 144:ef7eb2e8f9f7 510 /**
<> 144:ef7eb2e8f9f7 511 * @}
<> 144:ef7eb2e8f9f7 512 */
<> 144:ef7eb2e8f9f7 513
<> 144:ef7eb2e8f9f7 514 /**
<> 144:ef7eb2e8f9f7 515 * @}
<> 144:ef7eb2e8f9f7 516 */
<> 144:ef7eb2e8f9f7 517
<> 144:ef7eb2e8f9f7 518 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/