en 129 / mbed-dev

fix LPC812 PWM

Dependents:   IR_LED_Send

Fork of mbed-dev by mbed official

targets/cmsis/TARGET_STM/TARGET_STM32L4/stm32l4xx_hal_rng.c@129:2e517c56bcfb, 2016-05-16 (annotated)

Committer:
nameless129
Date:
Mon May 16 16:50:30 2016 +0000
Revision:
129:2e517c56bcfb
Parent:
0:9b334a45a8ff 
PWM Fix:Duty 0%??H???????????????

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /**
bogdanm 0:9b334a45a8ff 2 ******************************************************************************
bogdanm 0:9b334a45a8ff 3 * @file stm32l4xx_hal_rng.c
bogdanm 0:9b334a45a8ff 4 * @author MCD Application Team
bogdanm 0:9b334a45a8ff 5 * @version V1.0.0
bogdanm 0:9b334a45a8ff 6 * @date 26-June-2015
bogdanm 0:9b334a45a8ff 7 * @brief RNG HAL module driver.
bogdanm 0:9b334a45a8ff 8 * This file provides firmware functions to manage the following
bogdanm 0:9b334a45a8ff 9 * functionalities of the Random Number Generator (RNG) peripheral:
bogdanm 0:9b334a45a8ff 10 * + Initialization/de-initialization functions
bogdanm 0:9b334a45a8ff 11 * + Peripheral Control functions
bogdanm 0:9b334a45a8ff 12 * + Peripheral State functions
bogdanm 0:9b334a45a8ff 13 *
bogdanm 0:9b334a45a8ff 14 @verbatim
bogdanm 0:9b334a45a8ff 15 ==============================================================================
bogdanm 0:9b334a45a8ff 16 ##### How to use this driver #####
bogdanm 0:9b334a45a8ff 17 ==============================================================================
bogdanm 0:9b334a45a8ff 18 [..]
bogdanm 0:9b334a45a8ff 19 The RNG HAL driver can be used as follows:
bogdanm 0:9b334a45a8ff 20
bogdanm 0:9b334a45a8ff 21 (#) Enable the RNG controller clock using __HAL_RCC_RNG_CLK_ENABLE() macro
bogdanm 0:9b334a45a8ff 22 in HAL_RNG_MspInit().
bogdanm 0:9b334a45a8ff 23 (#) Activate the RNG peripheral using HAL_RNG_Init() function.
bogdanm 0:9b334a45a8ff 24 (#) Wait until the 32-bit Random Number Generator contains a valid
bogdanm 0:9b334a45a8ff 25 random data using (polling/interrupt) mode.
bogdanm 0:9b334a45a8ff 26 (#) Get the 32 bit random number using HAL_RNG_GenerateRandomNumber() function.
bogdanm 0:9b334a45a8ff 27
bogdanm 0:9b334a45a8ff 28 @endverbatim
bogdanm 0:9b334a45a8ff 29 ******************************************************************************
bogdanm 0:9b334a45a8ff 30 * @attention
bogdanm 0:9b334a45a8ff 31 *
bogdanm 0:9b334a45a8ff 32 * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
bogdanm 0:9b334a45a8ff 33 *
bogdanm 0:9b334a45a8ff 34 * Redistribution and use in source and binary forms, with or without modification,
bogdanm 0:9b334a45a8ff 35 * are permitted provided that the following conditions are met:
bogdanm 0:9b334a45a8ff 36 * 1. Redistributions of source code must retain the above copyright notice,
bogdanm 0:9b334a45a8ff 37 * this list of conditions and the following disclaimer.
bogdanm 0:9b334a45a8ff 38 * 2. Redistributions in binary form must reproduce the above copyright notice,
bogdanm 0:9b334a45a8ff 39 * this list of conditions and the following disclaimer in the documentation
bogdanm 0:9b334a45a8ff 40 * and/or other materials provided with the distribution.
bogdanm 0:9b334a45a8ff 41 * 3. Neither the name of STMicroelectronics nor the names of its contributors
bogdanm 0:9b334a45a8ff 42 * may be used to endorse or promote products derived from this software
bogdanm 0:9b334a45a8ff 43 * without specific prior written permission.
bogdanm 0:9b334a45a8ff 44 *
bogdanm 0:9b334a45a8ff 45 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
bogdanm 0:9b334a45a8ff 46 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
bogdanm 0:9b334a45a8ff 47 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
bogdanm 0:9b334a45a8ff 48 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
bogdanm 0:9b334a45a8ff 49 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
bogdanm 0:9b334a45a8ff 50 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
bogdanm 0:9b334a45a8ff 51 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
bogdanm 0:9b334a45a8ff 52 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
bogdanm 0:9b334a45a8ff 53 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
bogdanm 0:9b334a45a8ff 54 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
bogdanm 0:9b334a45a8ff 55 *
bogdanm 0:9b334a45a8ff 56 ******************************************************************************
bogdanm 0:9b334a45a8ff 57 */
bogdanm 0:9b334a45a8ff 58
bogdanm 0:9b334a45a8ff 59 /* Includes ------------------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 60 #include "stm32l4xx_hal.h"
bogdanm 0:9b334a45a8ff 61
bogdanm 0:9b334a45a8ff 62 /** @addtogroup STM32L4xx_HAL_Driver
bogdanm 0:9b334a45a8ff 63 * @{
bogdanm 0:9b334a45a8ff 64 */
bogdanm 0:9b334a45a8ff 65
bogdanm 0:9b334a45a8ff 66 /** @defgroup RNG RNG
bogdanm 0:9b334a45a8ff 67 * @brief RNG HAL module driver.
bogdanm 0:9b334a45a8ff 68 * @{
bogdanm 0:9b334a45a8ff 69 */
bogdanm 0:9b334a45a8ff 70
bogdanm 0:9b334a45a8ff 71 #ifdef HAL_RNG_MODULE_ENABLED
bogdanm 0:9b334a45a8ff 72
bogdanm 0:9b334a45a8ff 73
bogdanm 0:9b334a45a8ff 74
bogdanm 0:9b334a45a8ff 75 /* Private types -------------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 76 /* Private defines -----------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 77 /** @defgroup RNG_Private_Constants RNG_Private_Constants
bogdanm 0:9b334a45a8ff 78 * @{
bogdanm 0:9b334a45a8ff 79 */
bogdanm 0:9b334a45a8ff 80 #define RNG_TIMEOUT_VALUE 2
bogdanm 0:9b334a45a8ff 81 /**
bogdanm 0:9b334a45a8ff 82 * @}
bogdanm 0:9b334a45a8ff 83 */
bogdanm 0:9b334a45a8ff 84
bogdanm 0:9b334a45a8ff 85 /* Private macros ------------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 86 /* Private variables ---------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 87 /* Private function prototypes -----------------------------------------------*/
bogdanm 0:9b334a45a8ff 88 /* Private functions ---------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 89 /* Exported functions --------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 90
bogdanm 0:9b334a45a8ff 91 /** @addtogroup RNG_Exported_Functions
bogdanm 0:9b334a45a8ff 92 * @{
bogdanm 0:9b334a45a8ff 93 */
bogdanm 0:9b334a45a8ff 94
bogdanm 0:9b334a45a8ff 95 /** @addtogroup RNG_Exported_Functions_Group1
bogdanm 0:9b334a45a8ff 96 * @brief Initialization and de-initialization functions
bogdanm 0:9b334a45a8ff 97 *
bogdanm 0:9b334a45a8ff 98 @verbatim
bogdanm 0:9b334a45a8ff 99 ===============================================================================
bogdanm 0:9b334a45a8ff 100 ##### Initialization and de-initialization functions #####
bogdanm 0:9b334a45a8ff 101 ===============================================================================
bogdanm 0:9b334a45a8ff 102 [..] This section provides functions allowing to:
bogdanm 0:9b334a45a8ff 103 (+) Initialize the RNG according to the specified parameters
bogdanm 0:9b334a45a8ff 104 in the RNG_InitTypeDef and create the associated handle
bogdanm 0:9b334a45a8ff 105 (+) DeInitialize the RNG peripheral
bogdanm 0:9b334a45a8ff 106 (+) Initialize the RNG MSP (MCU Specific Package)
bogdanm 0:9b334a45a8ff 107 (+) DeInitialize the RNG MSP
bogdanm 0:9b334a45a8ff 108
bogdanm 0:9b334a45a8ff 109 @endverbatim
bogdanm 0:9b334a45a8ff 110 * @{
bogdanm 0:9b334a45a8ff 111 */
bogdanm 0:9b334a45a8ff 112
bogdanm 0:9b334a45a8ff 113 /**
bogdanm 0:9b334a45a8ff 114 * @brief Initialize the RNG peripheral and initialize the associated handle.
bogdanm 0:9b334a45a8ff 115 * @param hrng: pointer to a RNG_HandleTypeDef structure.
bogdanm 0:9b334a45a8ff 116 * @retval HAL status
bogdanm 0:9b334a45a8ff 117 */
bogdanm 0:9b334a45a8ff 118 HAL_StatusTypeDef HAL_RNG_Init(RNG_HandleTypeDef *hrng)
bogdanm 0:9b334a45a8ff 119 {
bogdanm 0:9b334a45a8ff 120 /* Check the RNG handle allocation */
bogdanm 0:9b334a45a8ff 121 if(hrng == NULL)
bogdanm 0:9b334a45a8ff 122 {
bogdanm 0:9b334a45a8ff 123 return HAL_ERROR;
bogdanm 0:9b334a45a8ff 124 }
bogdanm 0:9b334a45a8ff 125
bogdanm 0:9b334a45a8ff 126 assert_param(IS_RNG_ALL_INSTANCE(hrng->Instance));
bogdanm 0:9b334a45a8ff 127
bogdanm 0:9b334a45a8ff 128 __HAL_LOCK(hrng);
bogdanm 0:9b334a45a8ff 129
bogdanm 0:9b334a45a8ff 130 if(hrng->State == HAL_RNG_STATE_RESET)
bogdanm 0:9b334a45a8ff 131 {
bogdanm 0:9b334a45a8ff 132 /* Allocate lock resource and initialize it */
bogdanm 0:9b334a45a8ff 133 hrng->Lock = HAL_UNLOCKED;
bogdanm 0:9b334a45a8ff 134
bogdanm 0:9b334a45a8ff 135 /* Init the low level hardware */
bogdanm 0:9b334a45a8ff 136 HAL_RNG_MspInit(hrng);
bogdanm 0:9b334a45a8ff 137 }
bogdanm 0:9b334a45a8ff 138
bogdanm 0:9b334a45a8ff 139 /* Change RNG peripheral state */
bogdanm 0:9b334a45a8ff 140 hrng->State = HAL_RNG_STATE_BUSY;
bogdanm 0:9b334a45a8ff 141
bogdanm 0:9b334a45a8ff 142 /* Enable the RNG Peripheral */
bogdanm 0:9b334a45a8ff 143 __HAL_RNG_ENABLE(hrng);
bogdanm 0:9b334a45a8ff 144
bogdanm 0:9b334a45a8ff 145 /* Initialize the RNG state */
bogdanm 0:9b334a45a8ff 146 hrng->State = HAL_RNG_STATE_READY;
bogdanm 0:9b334a45a8ff 147
bogdanm 0:9b334a45a8ff 148 __HAL_UNLOCK(hrng);
bogdanm 0:9b334a45a8ff 149
bogdanm 0:9b334a45a8ff 150 /* Return function status */
bogdanm 0:9b334a45a8ff 151 return HAL_OK;
bogdanm 0:9b334a45a8ff 152 }
bogdanm 0:9b334a45a8ff 153
bogdanm 0:9b334a45a8ff 154 /**
bogdanm 0:9b334a45a8ff 155 * @brief DeInitialize the RNG peripheral.
bogdanm 0:9b334a45a8ff 156 * @param hrng: pointer to a RNG_HandleTypeDef structure.
bogdanm 0:9b334a45a8ff 157 * @retval HAL status
bogdanm 0:9b334a45a8ff 158 */
bogdanm 0:9b334a45a8ff 159 HAL_StatusTypeDef HAL_RNG_DeInit(RNG_HandleTypeDef *hrng)
bogdanm 0:9b334a45a8ff 160 {
bogdanm 0:9b334a45a8ff 161 /* Check the RNG handle allocation */
bogdanm 0:9b334a45a8ff 162 if(hrng == NULL)
bogdanm 0:9b334a45a8ff 163 {
bogdanm 0:9b334a45a8ff 164 return HAL_ERROR;
bogdanm 0:9b334a45a8ff 165 }
bogdanm 0:9b334a45a8ff 166 /* Disable the RNG Peripheral */
bogdanm 0:9b334a45a8ff 167 CLEAR_BIT(hrng->Instance->CR, RNG_CR_IE | RNG_CR_RNGEN);
bogdanm 0:9b334a45a8ff 168
bogdanm 0:9b334a45a8ff 169 /* Clear RNG interrupt status flags */
bogdanm 0:9b334a45a8ff 170 CLEAR_BIT(hrng->Instance->SR, RNG_SR_CEIS | RNG_SR_SEIS);
bogdanm 0:9b334a45a8ff 171
bogdanm 0:9b334a45a8ff 172 /* DeInit the low level hardware */
bogdanm 0:9b334a45a8ff 173 HAL_RNG_MspDeInit(hrng);
bogdanm 0:9b334a45a8ff 174
bogdanm 0:9b334a45a8ff 175 /* Update the RNG state */
bogdanm 0:9b334a45a8ff 176 hrng->State = HAL_RNG_STATE_RESET;
bogdanm 0:9b334a45a8ff 177
bogdanm 0:9b334a45a8ff 178 /* Release Lock */
bogdanm 0:9b334a45a8ff 179 __HAL_UNLOCK(hrng);
bogdanm 0:9b334a45a8ff 180
bogdanm 0:9b334a45a8ff 181 /* Return the function status */
bogdanm 0:9b334a45a8ff 182 return HAL_OK;
bogdanm 0:9b334a45a8ff 183 }
bogdanm 0:9b334a45a8ff 184
bogdanm 0:9b334a45a8ff 185 /**
bogdanm 0:9b334a45a8ff 186 * @brief Initialize the RNG MSP.
bogdanm 0:9b334a45a8ff 187 * @param hrng: pointer to a RNG_HandleTypeDef structure.
bogdanm 0:9b334a45a8ff 188 * @retval None
bogdanm 0:9b334a45a8ff 189 */
bogdanm 0:9b334a45a8ff 190 __weak void HAL_RNG_MspInit(RNG_HandleTypeDef *hrng)
bogdanm 0:9b334a45a8ff 191 {
bogdanm 0:9b334a45a8ff 192 /* NOTE : This function should not be modified. When the callback is needed,
bogdanm 0:9b334a45a8ff 193 function HAL_RNG_MspInit must be implemented in the user file.
bogdanm 0:9b334a45a8ff 194 */
bogdanm 0:9b334a45a8ff 195 }
bogdanm 0:9b334a45a8ff 196
bogdanm 0:9b334a45a8ff 197 /**
bogdanm 0:9b334a45a8ff 198 * @brief DeInitialize the RNG MSP.
bogdanm 0:9b334a45a8ff 199 * @param hrng: pointer to a RNG_HandleTypeDef structure.
bogdanm 0:9b334a45a8ff 200 * @retval None
bogdanm 0:9b334a45a8ff 201 */
bogdanm 0:9b334a45a8ff 202 __weak void HAL_RNG_MspDeInit(RNG_HandleTypeDef *hrng)
bogdanm 0:9b334a45a8ff 203 {
bogdanm 0:9b334a45a8ff 204 /* NOTE : This function should not be modified. When the callback is needed,
bogdanm 0:9b334a45a8ff 205 function HAL_RNG_MspDeInit must be implemented in the user file.
bogdanm 0:9b334a45a8ff 206 */
bogdanm 0:9b334a45a8ff 207 }
bogdanm 0:9b334a45a8ff 208
bogdanm 0:9b334a45a8ff 209 /**
bogdanm 0:9b334a45a8ff 210 * @}
bogdanm 0:9b334a45a8ff 211 */
bogdanm 0:9b334a45a8ff 212
bogdanm 0:9b334a45a8ff 213 /** @addtogroup RNG_Exported_Functions_Group2
bogdanm 0:9b334a45a8ff 214 * @brief Management functions.
bogdanm 0:9b334a45a8ff 215 *
bogdanm 0:9b334a45a8ff 216 @verbatim
bogdanm 0:9b334a45a8ff 217 ===============================================================================
bogdanm 0:9b334a45a8ff 218 ##### Peripheral Control functions #####
bogdanm 0:9b334a45a8ff 219 ===============================================================================
bogdanm 0:9b334a45a8ff 220 [..] This section provides functions allowing to:
bogdanm 0:9b334a45a8ff 221 (+) Get the 32 bit Random number
bogdanm 0:9b334a45a8ff 222 (+) Get the 32 bit Random number with interrupt enabled
bogdanm 0:9b334a45a8ff 223 (+) Handle RNG interrupt request
bogdanm 0:9b334a45a8ff 224
bogdanm 0:9b334a45a8ff 225 @endverbatim
bogdanm 0:9b334a45a8ff 226 * @{
bogdanm 0:9b334a45a8ff 227 */
bogdanm 0:9b334a45a8ff 228
bogdanm 0:9b334a45a8ff 229 /**
bogdanm 0:9b334a45a8ff 230 * @brief Generate a 32-bit random number.
bogdanm 0:9b334a45a8ff 231 * @note Each time the random number data is read the RNG_FLAG_DRDY flag
bogdanm 0:9b334a45a8ff 232 * is automatically cleared.
bogdanm 0:9b334a45a8ff 233 * @param hrng: pointer to a RNG_HandleTypeDef structure.
bogdanm 0:9b334a45a8ff 234 * @param random32bit: pointer to generated random number variable if successful.
bogdanm 0:9b334a45a8ff 235 * @retval HAL status
bogdanm 0:9b334a45a8ff 236 */
bogdanm 0:9b334a45a8ff 237
bogdanm 0:9b334a45a8ff 238 HAL_StatusTypeDef HAL_RNG_GenerateRandomNumber(RNG_HandleTypeDef *hrng, uint32_t *random32bit)
bogdanm 0:9b334a45a8ff 239 {
bogdanm 0:9b334a45a8ff 240 uint32_t tickstart = 0;
bogdanm 0:9b334a45a8ff 241 HAL_StatusTypeDef status = HAL_OK;
bogdanm 0:9b334a45a8ff 242
bogdanm 0:9b334a45a8ff 243 /* Process Locked */
bogdanm 0:9b334a45a8ff 244 __HAL_LOCK(hrng);
bogdanm 0:9b334a45a8ff 245
bogdanm 0:9b334a45a8ff 246 /* Check RNS peripheral state */
bogdanm 0:9b334a45a8ff 247 if(hrng->State == HAL_RNG_STATE_READY)
bogdanm 0:9b334a45a8ff 248 {
bogdanm 0:9b334a45a8ff 249 /* Change RNG peripheral state */
bogdanm 0:9b334a45a8ff 250 hrng->State = HAL_RNG_STATE_BUSY;
bogdanm 0:9b334a45a8ff 251
bogdanm 0:9b334a45a8ff 252 /* Get tick */
bogdanm 0:9b334a45a8ff 253 tickstart = HAL_GetTick();
bogdanm 0:9b334a45a8ff 254
bogdanm 0:9b334a45a8ff 255 /* Check if data register contains valid random data */
bogdanm 0:9b334a45a8ff 256 while(__HAL_RNG_GET_FLAG(hrng, RNG_FLAG_DRDY) == RESET)
bogdanm 0:9b334a45a8ff 257 {
bogdanm 0:9b334a45a8ff 258 if((HAL_GetTick() - tickstart ) > RNG_TIMEOUT_VALUE)
bogdanm 0:9b334a45a8ff 259 {
bogdanm 0:9b334a45a8ff 260 hrng->State = HAL_RNG_STATE_ERROR;
bogdanm 0:9b334a45a8ff 261
bogdanm 0:9b334a45a8ff 262 /* Process Unlocked */
bogdanm 0:9b334a45a8ff 263 __HAL_UNLOCK(hrng);
bogdanm 0:9b334a45a8ff 264
bogdanm 0:9b334a45a8ff 265 return HAL_TIMEOUT;
bogdanm 0:9b334a45a8ff 266 }
bogdanm 0:9b334a45a8ff 267 }
bogdanm 0:9b334a45a8ff 268
bogdanm 0:9b334a45a8ff 269 /* Get a 32bit Random number */
bogdanm 0:9b334a45a8ff 270 hrng->RandomNumber = hrng->Instance->DR;
bogdanm 0:9b334a45a8ff 271 *random32bit = hrng->RandomNumber;
bogdanm 0:9b334a45a8ff 272
bogdanm 0:9b334a45a8ff 273 hrng->State = HAL_RNG_STATE_READY;
bogdanm 0:9b334a45a8ff 274 }
bogdanm 0:9b334a45a8ff 275 else
bogdanm 0:9b334a45a8ff 276 {
bogdanm 0:9b334a45a8ff 277 status = HAL_ERROR;
bogdanm 0:9b334a45a8ff 278 }
bogdanm 0:9b334a45a8ff 279
bogdanm 0:9b334a45a8ff 280 /* Process Unlocked */
bogdanm 0:9b334a45a8ff 281 __HAL_UNLOCK(hrng);
bogdanm 0:9b334a45a8ff 282
bogdanm 0:9b334a45a8ff 283 return status;
bogdanm 0:9b334a45a8ff 284 }
bogdanm 0:9b334a45a8ff 285
bogdanm 0:9b334a45a8ff 286 /**
bogdanm 0:9b334a45a8ff 287 * @brief Generate a 32-bit random number in interrupt mode.
bogdanm 0:9b334a45a8ff 288 * @param hrng: pointer to a RNG_HandleTypeDef structure.
bogdanm 0:9b334a45a8ff 289 * @retval HAL status
bogdanm 0:9b334a45a8ff 290 */
bogdanm 0:9b334a45a8ff 291 HAL_StatusTypeDef HAL_RNG_GenerateRandomNumber_IT(RNG_HandleTypeDef *hrng)
bogdanm 0:9b334a45a8ff 292 {
bogdanm 0:9b334a45a8ff 293 HAL_StatusTypeDef status = HAL_OK;
bogdanm 0:9b334a45a8ff 294
bogdanm 0:9b334a45a8ff 295 /* Process Locked */
bogdanm 0:9b334a45a8ff 296 __HAL_LOCK(hrng);
bogdanm 0:9b334a45a8ff 297
bogdanm 0:9b334a45a8ff 298 /* Check RNG peripheral state */
bogdanm 0:9b334a45a8ff 299 if(hrng->State == HAL_RNG_STATE_READY)
bogdanm 0:9b334a45a8ff 300 {
bogdanm 0:9b334a45a8ff 301 /* Change RNG peripheral state */
bogdanm 0:9b334a45a8ff 302 hrng->State = HAL_RNG_STATE_BUSY;
bogdanm 0:9b334a45a8ff 303
bogdanm 0:9b334a45a8ff 304 /* Process Unlocked */
bogdanm 0:9b334a45a8ff 305 __HAL_UNLOCK(hrng);
bogdanm 0:9b334a45a8ff 306
bogdanm 0:9b334a45a8ff 307 /* Enable the RNG Interrupts: Data Ready, Clock error, Seed error */
bogdanm 0:9b334a45a8ff 308 __HAL_RNG_ENABLE_IT(hrng);
bogdanm 0:9b334a45a8ff 309 }
bogdanm 0:9b334a45a8ff 310 else
bogdanm 0:9b334a45a8ff 311 {
bogdanm 0:9b334a45a8ff 312 /* Process Unlocked */
bogdanm 0:9b334a45a8ff 313 __HAL_UNLOCK(hrng);
bogdanm 0:9b334a45a8ff 314
bogdanm 0:9b334a45a8ff 315 status = HAL_ERROR;
bogdanm 0:9b334a45a8ff 316 }
bogdanm 0:9b334a45a8ff 317
bogdanm 0:9b334a45a8ff 318 return status;
bogdanm 0:9b334a45a8ff 319 }
bogdanm 0:9b334a45a8ff 320
bogdanm 0:9b334a45a8ff 321 /**
bogdanm 0:9b334a45a8ff 322 * @brief Handle RNG interrupt request.
bogdanm 0:9b334a45a8ff 323 * @note In the case of a clock error, the RNG is no more able to generate
bogdanm 0:9b334a45a8ff 324 * random numbers because the PLL48CLK clock is not correct. User has
bogdanm 0:9b334a45a8ff 325 * to check that the clock controller is correctly configured to provide
bogdanm 0:9b334a45a8ff 326 * the RNG clock and clear the CEIS bit using __HAL_RNG_CLEAR_IT().
bogdanm 0:9b334a45a8ff 327 * The clock error has no impact on the previously generated
bogdanm 0:9b334a45a8ff 328 * random numbers, and the RNG_DR register contents can be used.
bogdanm 0:9b334a45a8ff 329 * @note In the case of a seed error, the generation of random numbers is
bogdanm 0:9b334a45a8ff 330 * interrupted as long as the SECS bit is '1'. If a number is
bogdanm 0:9b334a45a8ff 331 * available in the RNG_DR register, it must not be used because it may
bogdanm 0:9b334a45a8ff 332 * not have enough entropy. In this case, it is recommended to clear the
bogdanm 0:9b334a45a8ff 333 * SEIS bit using __HAL_RNG_CLEAR_IT(), then disable and enable
bogdanm 0:9b334a45a8ff 334 * the RNG peripheral to reinitialize and restart the RNG.
bogdanm 0:9b334a45a8ff 335 * @note User-written HAL_RNG_ErrorCallback() API is called once whether SEIS
bogdanm 0:9b334a45a8ff 336 * or CEIS are set.
bogdanm 0:9b334a45a8ff 337 * @param hrng: pointer to a RNG_HandleTypeDef structure.
bogdanm 0:9b334a45a8ff 338 * @retval None
bogdanm 0:9b334a45a8ff 339
bogdanm 0:9b334a45a8ff 340 */
bogdanm 0:9b334a45a8ff 341 void HAL_RNG_IRQHandler(RNG_HandleTypeDef *hrng)
bogdanm 0:9b334a45a8ff 342 {
bogdanm 0:9b334a45a8ff 343 /* RNG clock error interrupt occurred */
bogdanm 0:9b334a45a8ff 344 if((__HAL_RNG_GET_IT(hrng, RNG_IT_CEI) != RESET) || (__HAL_RNG_GET_IT(hrng, RNG_IT_SEI) != RESET))
bogdanm 0:9b334a45a8ff 345 {
bogdanm 0:9b334a45a8ff 346 /* Change RNG peripheral state */
bogdanm 0:9b334a45a8ff 347 hrng->State = HAL_RNG_STATE_ERROR;
bogdanm 0:9b334a45a8ff 348
bogdanm 0:9b334a45a8ff 349 HAL_RNG_ErrorCallback(hrng);
bogdanm 0:9b334a45a8ff 350
bogdanm 0:9b334a45a8ff 351 /* Clear the clock error flag */
bogdanm 0:9b334a45a8ff 352 __HAL_RNG_CLEAR_IT(hrng, RNG_IT_CEI|RNG_IT_SEI);
bogdanm 0:9b334a45a8ff 353
bogdanm 0:9b334a45a8ff 354 }
bogdanm 0:9b334a45a8ff 355
bogdanm 0:9b334a45a8ff 356 /* Check RNG data ready interrupt occurred */
bogdanm 0:9b334a45a8ff 357 if(__HAL_RNG_GET_IT(hrng, RNG_IT_DRDY) != RESET)
bogdanm 0:9b334a45a8ff 358 {
bogdanm 0:9b334a45a8ff 359 /* Generate random number once, so disable the IT */
bogdanm 0:9b334a45a8ff 360 __HAL_RNG_DISABLE_IT(hrng);
bogdanm 0:9b334a45a8ff 361
bogdanm 0:9b334a45a8ff 362 /* Get the 32bit Random number (DRDY flag automatically cleared) */
bogdanm 0:9b334a45a8ff 363 hrng->RandomNumber = hrng->Instance->DR;
bogdanm 0:9b334a45a8ff 364
bogdanm 0:9b334a45a8ff 365 if(hrng->State != HAL_RNG_STATE_ERROR)
bogdanm 0:9b334a45a8ff 366 {
bogdanm 0:9b334a45a8ff 367 /* Change RNG peripheral state */
bogdanm 0:9b334a45a8ff 368 hrng->State = HAL_RNG_STATE_READY;
bogdanm 0:9b334a45a8ff 369
bogdanm 0:9b334a45a8ff 370 /* Data Ready callback */
bogdanm 0:9b334a45a8ff 371 HAL_RNG_ReadyDataCallback(hrng, hrng->RandomNumber);
bogdanm 0:9b334a45a8ff 372 }
bogdanm 0:9b334a45a8ff 373 }
bogdanm 0:9b334a45a8ff 374 }
bogdanm 0:9b334a45a8ff 375
bogdanm 0:9b334a45a8ff 376 /**
bogdanm 0:9b334a45a8ff 377 * @brief Return generated random number in polling mode (Obsolete).
bogdanm 0:9b334a45a8ff 378 * @note Use HAL_RNG_GenerateRandomNumber() API instead.
bogdanm 0:9b334a45a8ff 379 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
bogdanm 0:9b334a45a8ff 380 * the configuration information for RNG.
bogdanm 0:9b334a45a8ff 381 * @retval random value
bogdanm 0:9b334a45a8ff 382 */
bogdanm 0:9b334a45a8ff 383 uint32_t HAL_RNG_GetRandomNumber(RNG_HandleTypeDef *hrng)
bogdanm 0:9b334a45a8ff 384 {
bogdanm 0:9b334a45a8ff 385 if(HAL_RNG_GenerateRandomNumber(hrng, &(hrng->RandomNumber)) == HAL_OK)
bogdanm 0:9b334a45a8ff 386 {
bogdanm 0:9b334a45a8ff 387 return hrng->RandomNumber;
bogdanm 0:9b334a45a8ff 388 }
bogdanm 0:9b334a45a8ff 389 else
bogdanm 0:9b334a45a8ff 390 {
bogdanm 0:9b334a45a8ff 391 return 0;
bogdanm 0:9b334a45a8ff 392 }
bogdanm 0:9b334a45a8ff 393 }
bogdanm 0:9b334a45a8ff 394
bogdanm 0:9b334a45a8ff 395
bogdanm 0:9b334a45a8ff 396 /**
bogdanm 0:9b334a45a8ff 397 * @brief Return a 32-bit random number with interrupt enabled (Obsolete).
bogdanm 0:9b334a45a8ff 398 * @note Use HAL_RNG_GenerateRandomNumber_IT() API instead.
bogdanm 0:9b334a45a8ff 399 * @param hrng: RNG handle
bogdanm 0:9b334a45a8ff 400 * @retval 32-bit random number
bogdanm 0:9b334a45a8ff 401 */
bogdanm 0:9b334a45a8ff 402 uint32_t HAL_RNG_GetRandomNumber_IT(RNG_HandleTypeDef *hrng)
bogdanm 0:9b334a45a8ff 403 {
bogdanm 0:9b334a45a8ff 404 uint32_t random32bit = 0;
bogdanm 0:9b334a45a8ff 405
bogdanm 0:9b334a45a8ff 406 /* Process locked */
bogdanm 0:9b334a45a8ff 407 __HAL_LOCK(hrng);
bogdanm 0:9b334a45a8ff 408
bogdanm 0:9b334a45a8ff 409 /* Change RNG peripheral state */
bogdanm 0:9b334a45a8ff 410 hrng->State = HAL_RNG_STATE_BUSY;
bogdanm 0:9b334a45a8ff 411
bogdanm 0:9b334a45a8ff 412 /* Get a 32bit Random number */
bogdanm 0:9b334a45a8ff 413 random32bit = hrng->Instance->DR;
bogdanm 0:9b334a45a8ff 414
bogdanm 0:9b334a45a8ff 415 /* Enable the RNG Interrupts: Data Ready, Clock error, Seed error */
bogdanm 0:9b334a45a8ff 416 __HAL_RNG_ENABLE_IT(hrng);
bogdanm 0:9b334a45a8ff 417
bogdanm 0:9b334a45a8ff 418 /* Return the 32 bit random number */
bogdanm 0:9b334a45a8ff 419 return random32bit;
bogdanm 0:9b334a45a8ff 420 }
bogdanm 0:9b334a45a8ff 421
bogdanm 0:9b334a45a8ff 422
bogdanm 0:9b334a45a8ff 423
bogdanm 0:9b334a45a8ff 424 /**
bogdanm 0:9b334a45a8ff 425 * @brief Read latest generated random number.
bogdanm 0:9b334a45a8ff 426 * @param hrng: pointer to a RNG_HandleTypeDef structure.
bogdanm 0:9b334a45a8ff 427 * @retval random value
bogdanm 0:9b334a45a8ff 428 */
bogdanm 0:9b334a45a8ff 429 uint32_t HAL_RNG_ReadLastRandomNumber(RNG_HandleTypeDef *hrng)
bogdanm 0:9b334a45a8ff 430 {
bogdanm 0:9b334a45a8ff 431 return(hrng->RandomNumber);
bogdanm 0:9b334a45a8ff 432 }
bogdanm 0:9b334a45a8ff 433
bogdanm 0:9b334a45a8ff 434 /**
bogdanm 0:9b334a45a8ff 435 * @brief Data Ready callback in non-blocking mode.
bogdanm 0:9b334a45a8ff 436 * @param hrng: pointer to a RNG_HandleTypeDef structure.
bogdanm 0:9b334a45a8ff 437 * @param random32bit: generated random value
bogdanm 0:9b334a45a8ff 438 * @retval None
bogdanm 0:9b334a45a8ff 439 */
bogdanm 0:9b334a45a8ff 440 __weak void HAL_RNG_ReadyDataCallback(RNG_HandleTypeDef *hrng, uint32_t random32bit)
bogdanm 0:9b334a45a8ff 441 {
bogdanm 0:9b334a45a8ff 442 /* NOTE : This function should not be modified. When the callback is needed,
bogdanm 0:9b334a45a8ff 443 function HAL_RNG_ReadyDataCallback must be implemented in the user file.
bogdanm 0:9b334a45a8ff 444 */
bogdanm 0:9b334a45a8ff 445 }
bogdanm 0:9b334a45a8ff 446
bogdanm 0:9b334a45a8ff 447 /**
bogdanm 0:9b334a45a8ff 448 * @brief RNG error callback.
bogdanm 0:9b334a45a8ff 449 * @param hrng: pointer to a RNG_HandleTypeDef structure.
bogdanm 0:9b334a45a8ff 450 * @retval None
bogdanm 0:9b334a45a8ff 451 */
bogdanm 0:9b334a45a8ff 452 __weak void HAL_RNG_ErrorCallback(RNG_HandleTypeDef *hrng)
bogdanm 0:9b334a45a8ff 453 {
bogdanm 0:9b334a45a8ff 454 /* NOTE : This function should not be modified. When the callback is needed,
bogdanm 0:9b334a45a8ff 455 function HAL_RNG_ErrorCallback must be implemented in the user file.
bogdanm 0:9b334a45a8ff 456 */
bogdanm 0:9b334a45a8ff 457 }
bogdanm 0:9b334a45a8ff 458
bogdanm 0:9b334a45a8ff 459 /**
bogdanm 0:9b334a45a8ff 460 * @}
bogdanm 0:9b334a45a8ff 461 */
bogdanm 0:9b334a45a8ff 462
bogdanm 0:9b334a45a8ff 463 /** @addtogroup RNG_Exported_Functions_Group3
bogdanm 0:9b334a45a8ff 464 * @brief Peripheral State functions.
bogdanm 0:9b334a45a8ff 465 *
bogdanm 0:9b334a45a8ff 466 @verbatim
bogdanm 0:9b334a45a8ff 467 ===============================================================================
bogdanm 0:9b334a45a8ff 468 ##### Peripheral State functions #####
bogdanm 0:9b334a45a8ff 469 ===============================================================================
bogdanm 0:9b334a45a8ff 470 [..]
bogdanm 0:9b334a45a8ff 471 This subsection permits to get in run-time the status of the peripheral.
bogdanm 0:9b334a45a8ff 472
bogdanm 0:9b334a45a8ff 473 @endverbatim
bogdanm 0:9b334a45a8ff 474 * @{
bogdanm 0:9b334a45a8ff 475 */
bogdanm 0:9b334a45a8ff 476
bogdanm 0:9b334a45a8ff 477 /**
bogdanm 0:9b334a45a8ff 478 * @brief Return the RNG handle state.
bogdanm 0:9b334a45a8ff 479 * @param hrng: pointer to a RNG_HandleTypeDef structure.
bogdanm 0:9b334a45a8ff 480 * @retval HAL state
bogdanm 0:9b334a45a8ff 481 */
bogdanm 0:9b334a45a8ff 482 HAL_RNG_StateTypeDef HAL_RNG_GetState(RNG_HandleTypeDef *hrng)
bogdanm 0:9b334a45a8ff 483 {
bogdanm 0:9b334a45a8ff 484 /* Return RNG handle state */
bogdanm 0:9b334a45a8ff 485 return hrng->State;
bogdanm 0:9b334a45a8ff 486 }
bogdanm 0:9b334a45a8ff 487
bogdanm 0:9b334a45a8ff 488 /**
bogdanm 0:9b334a45a8ff 489 * @}
bogdanm 0:9b334a45a8ff 490 */
bogdanm 0:9b334a45a8ff 491
bogdanm 0:9b334a45a8ff 492 /**
bogdanm 0:9b334a45a8ff 493 * @}
bogdanm 0:9b334a45a8ff 494 */
bogdanm 0:9b334a45a8ff 495
bogdanm 0:9b334a45a8ff 496
bogdanm 0:9b334a45a8ff 497 #endif /* HAL_RNG_MODULE_ENABLED */
bogdanm 0:9b334a45a8ff 498 /**
bogdanm 0:9b334a45a8ff 499 * @}
bogdanm 0:9b334a45a8ff 500 */
bogdanm 0:9b334a45a8ff 501
bogdanm 0:9b334a45a8ff 502 /**
bogdanm 0:9b334a45a8ff 503 * @}
bogdanm 0:9b334a45a8ff 504 */
bogdanm 0:9b334a45a8ff 505
bogdanm 0:9b334a45a8ff 506 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/