en 129 / mbed-dev

fix LPC812 PWM

Dependents:   IR_LED_Send

Fork of mbed-dev by mbed official

targets/cmsis/TARGET_STM/TARGET_STM32F7/stm32f7xx_hal_rng.c@129:2e517c56bcfb, 2016-05-16 (annotated)

Committer:
nameless129
Date:
Mon May 16 16:50:30 2016 +0000
Revision:
129:2e517c56bcfb
Parent:
83:a036322b8637 
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 stm32f7xx_hal_rng.c
bogdanm 0:9b334a45a8ff 4 * @author MCD Application Team
mbed_official 83:a036322b8637 5 * @version V1.0.4
mbed_official 83:a036322b8637 6 * @date 09-December-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 "stm32f7xx_hal.h"
bogdanm 0:9b334a45a8ff 61
bogdanm 0:9b334a45a8ff 62 /** @addtogroup STM32F7xx_HAL_Driver
bogdanm 0:9b334a45a8ff 63 * @{
bogdanm 0:9b334a45a8ff 64 */
bogdanm 0:9b334a45a8ff 65
bogdanm 0:9b334a45a8ff 66 /** @addtogroup RNG
bogdanm 0:9b334a45a8ff 67 * @{
bogdanm 0:9b334a45a8ff 68 */
bogdanm 0:9b334a45a8ff 69
bogdanm 0:9b334a45a8ff 70 #ifdef HAL_RNG_MODULE_ENABLED
bogdanm 0:9b334a45a8ff 71
bogdanm 0:9b334a45a8ff 72 /* Private types -------------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 73 /* Private defines -----------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 74 /* Private variables ---------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 75 /* Private constants ---------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 76 /** @addtogroup RNG_Private_Constants
bogdanm 0:9b334a45a8ff 77 * @{
bogdanm 0:9b334a45a8ff 78 */
bogdanm 0:9b334a45a8ff 79 #define RNG_TIMEOUT_VALUE 2
bogdanm 0:9b334a45a8ff 80 /**
bogdanm 0:9b334a45a8ff 81 * @}
bogdanm 0:9b334a45a8ff 82 */
bogdanm 0:9b334a45a8ff 83 /* Private macros ------------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 84 /* Private functions prototypes ----------------------------------------------*/
bogdanm 0:9b334a45a8ff 85 /* Private functions ---------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 86 /* Exported functions --------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 87
bogdanm 0:9b334a45a8ff 88 /** @addtogroup RNG_Exported_Functions
bogdanm 0:9b334a45a8ff 89 * @{
bogdanm 0:9b334a45a8ff 90 */
bogdanm 0:9b334a45a8ff 91
bogdanm 0:9b334a45a8ff 92 /** @addtogroup RNG_Exported_Functions_Group1
bogdanm 0:9b334a45a8ff 93 * @brief Initialization and de-initialization functions
bogdanm 0:9b334a45a8ff 94 *
bogdanm 0:9b334a45a8ff 95 @verbatim
bogdanm 0:9b334a45a8ff 96 ===============================================================================
bogdanm 0:9b334a45a8ff 97 ##### Initialization and de-initialization functions #####
bogdanm 0:9b334a45a8ff 98 ===============================================================================
bogdanm 0:9b334a45a8ff 99 [..] This section provides functions allowing to:
bogdanm 0:9b334a45a8ff 100 (+) Initialize the RNG according to the specified parameters
bogdanm 0:9b334a45a8ff 101 in the RNG_InitTypeDef and create the associated handle
bogdanm 0:9b334a45a8ff 102 (+) DeInitialize the RNG peripheral
bogdanm 0:9b334a45a8ff 103 (+) Initialize the RNG MSP
bogdanm 0:9b334a45a8ff 104 (+) DeInitialize RNG MSP
bogdanm 0:9b334a45a8ff 105
bogdanm 0:9b334a45a8ff 106 @endverbatim
bogdanm 0:9b334a45a8ff 107 * @{
bogdanm 0:9b334a45a8ff 108 */
bogdanm 0:9b334a45a8ff 109
bogdanm 0:9b334a45a8ff 110 /**
bogdanm 0:9b334a45a8ff 111 * @brief Initializes the RNG peripheral and creates the associated handle.
bogdanm 0:9b334a45a8ff 112 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
bogdanm 0:9b334a45a8ff 113 * the configuration information for RNG.
bogdanm 0:9b334a45a8ff 114 * @retval HAL status
bogdanm 0:9b334a45a8ff 115 */
bogdanm 0:9b334a45a8ff 116 HAL_StatusTypeDef HAL_RNG_Init(RNG_HandleTypeDef *hrng)
bogdanm 0:9b334a45a8ff 117 {
bogdanm 0:9b334a45a8ff 118 /* Check the RNG handle allocation */
bogdanm 0:9b334a45a8ff 119 if(hrng == NULL)
bogdanm 0:9b334a45a8ff 120 {
bogdanm 0:9b334a45a8ff 121 return HAL_ERROR;
bogdanm 0:9b334a45a8ff 122 }
bogdanm 0:9b334a45a8ff 123
bogdanm 0:9b334a45a8ff 124 __HAL_LOCK(hrng);
bogdanm 0:9b334a45a8ff 125
bogdanm 0:9b334a45a8ff 126 if(hrng->State == HAL_RNG_STATE_RESET)
bogdanm 0:9b334a45a8ff 127 {
bogdanm 0:9b334a45a8ff 128 /* Allocate lock resource and initialize it */
bogdanm 0:9b334a45a8ff 129 hrng->Lock = HAL_UNLOCKED;
bogdanm 0:9b334a45a8ff 130
bogdanm 0:9b334a45a8ff 131 /* Init the low level hardware */
bogdanm 0:9b334a45a8ff 132 HAL_RNG_MspInit(hrng);
bogdanm 0:9b334a45a8ff 133 }
bogdanm 0:9b334a45a8ff 134
bogdanm 0:9b334a45a8ff 135 /* Change RNG peripheral state */
bogdanm 0:9b334a45a8ff 136 hrng->State = HAL_RNG_STATE_BUSY;
bogdanm 0:9b334a45a8ff 137
bogdanm 0:9b334a45a8ff 138 /* Enable the RNG Peripheral */
bogdanm 0:9b334a45a8ff 139 __HAL_RNG_ENABLE(hrng);
bogdanm 0:9b334a45a8ff 140
bogdanm 0:9b334a45a8ff 141 /* Initialize the RNG state */
bogdanm 0:9b334a45a8ff 142 hrng->State = HAL_RNG_STATE_READY;
bogdanm 0:9b334a45a8ff 143
bogdanm 0:9b334a45a8ff 144 __HAL_UNLOCK(hrng);
bogdanm 0:9b334a45a8ff 145
bogdanm 0:9b334a45a8ff 146 /* Return function status */
bogdanm 0:9b334a45a8ff 147 return HAL_OK;
bogdanm 0:9b334a45a8ff 148 }
bogdanm 0:9b334a45a8ff 149
bogdanm 0:9b334a45a8ff 150 /**
bogdanm 0:9b334a45a8ff 151 * @brief DeInitializes the RNG peripheral.
bogdanm 0:9b334a45a8ff 152 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
bogdanm 0:9b334a45a8ff 153 * the configuration information for RNG.
bogdanm 0:9b334a45a8ff 154 * @retval HAL status
bogdanm 0:9b334a45a8ff 155 */
bogdanm 0:9b334a45a8ff 156 HAL_StatusTypeDef HAL_RNG_DeInit(RNG_HandleTypeDef *hrng)
bogdanm 0:9b334a45a8ff 157 {
bogdanm 0:9b334a45a8ff 158 /* Check the RNG handle allocation */
bogdanm 0:9b334a45a8ff 159 if(hrng == NULL)
bogdanm 0:9b334a45a8ff 160 {
bogdanm 0:9b334a45a8ff 161 return HAL_ERROR;
bogdanm 0:9b334a45a8ff 162 }
bogdanm 0:9b334a45a8ff 163 /* Disable the RNG Peripheral */
bogdanm 0:9b334a45a8ff 164 CLEAR_BIT(hrng->Instance->CR, RNG_CR_IE | RNG_CR_RNGEN);
bogdanm 0:9b334a45a8ff 165
bogdanm 0:9b334a45a8ff 166 /* Clear RNG interrupt status flags */
bogdanm 0:9b334a45a8ff 167 CLEAR_BIT(hrng->Instance->SR, RNG_SR_CEIS | RNG_SR_SEIS);
bogdanm 0:9b334a45a8ff 168
bogdanm 0:9b334a45a8ff 169 /* DeInit the low level hardware */
bogdanm 0:9b334a45a8ff 170 HAL_RNG_MspDeInit(hrng);
bogdanm 0:9b334a45a8ff 171
bogdanm 0:9b334a45a8ff 172 /* Update the RNG state */
bogdanm 0:9b334a45a8ff 173 hrng->State = HAL_RNG_STATE_RESET;
bogdanm 0:9b334a45a8ff 174
bogdanm 0:9b334a45a8ff 175 /* Release Lock */
bogdanm 0:9b334a45a8ff 176 __HAL_UNLOCK(hrng);
bogdanm 0:9b334a45a8ff 177
bogdanm 0:9b334a45a8ff 178 /* Return the function status */
bogdanm 0:9b334a45a8ff 179 return HAL_OK;
bogdanm 0:9b334a45a8ff 180 }
bogdanm 0:9b334a45a8ff 181
bogdanm 0:9b334a45a8ff 182 /**
bogdanm 0:9b334a45a8ff 183 * @brief Initializes the RNG MSP.
bogdanm 0:9b334a45a8ff 184 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
bogdanm 0:9b334a45a8ff 185 * the configuration information for RNG.
bogdanm 0:9b334a45a8ff 186 * @retval None
bogdanm 0:9b334a45a8ff 187 */
bogdanm 0:9b334a45a8ff 188 __weak void HAL_RNG_MspInit(RNG_HandleTypeDef *hrng)
bogdanm 0:9b334a45a8ff 189 {
mbed_official 83:a036322b8637 190 /* Prevent unused argument(s) compilation warning */
mbed_official 83:a036322b8637 191 UNUSED(hrng);
mbed_official 83:a036322b8637 192
bogdanm 0:9b334a45a8ff 193 /* NOTE : This function should not be modified. When the callback is needed,
bogdanm 0:9b334a45a8ff 194 function HAL_RNG_MspInit must be implemented in the user file.
bogdanm 0:9b334a45a8ff 195 */
bogdanm 0:9b334a45a8ff 196 }
bogdanm 0:9b334a45a8ff 197
bogdanm 0:9b334a45a8ff 198 /**
bogdanm 0:9b334a45a8ff 199 * @brief DeInitializes the RNG MSP.
bogdanm 0:9b334a45a8ff 200 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
bogdanm 0:9b334a45a8ff 201 * the configuration information for RNG.
bogdanm 0:9b334a45a8ff 202 * @retval None
bogdanm 0:9b334a45a8ff 203 */
bogdanm 0:9b334a45a8ff 204 __weak void HAL_RNG_MspDeInit(RNG_HandleTypeDef *hrng)
bogdanm 0:9b334a45a8ff 205 {
mbed_official 83:a036322b8637 206 /* Prevent unused argument(s) compilation warning */
mbed_official 83:a036322b8637 207 UNUSED(hrng);
mbed_official 83:a036322b8637 208
bogdanm 0:9b334a45a8ff 209 /* NOTE : This function should not be modified. When the callback is needed,
bogdanm 0:9b334a45a8ff 210 function HAL_RNG_MspDeInit must be implemented in the user file.
bogdanm 0:9b334a45a8ff 211 */
bogdanm 0:9b334a45a8ff 212 }
bogdanm 0:9b334a45a8ff 213
bogdanm 0:9b334a45a8ff 214 /**
bogdanm 0:9b334a45a8ff 215 * @}
bogdanm 0:9b334a45a8ff 216 */
bogdanm 0:9b334a45a8ff 217
bogdanm 0:9b334a45a8ff 218 /** @addtogroup RNG_Exported_Functions_Group2
bogdanm 0:9b334a45a8ff 219 * @brief Peripheral Control functions
bogdanm 0:9b334a45a8ff 220 *
bogdanm 0:9b334a45a8ff 221 @verbatim
bogdanm 0:9b334a45a8ff 222 ===============================================================================
bogdanm 0:9b334a45a8ff 223 ##### Peripheral Control functions #####
bogdanm 0:9b334a45a8ff 224 ===============================================================================
bogdanm 0:9b334a45a8ff 225 [..] This section provides functions allowing to:
bogdanm 0:9b334a45a8ff 226 (+) Get the 32 bit Random number
bogdanm 0:9b334a45a8ff 227 (+) Get the 32 bit Random number with interrupt enabled
bogdanm 0:9b334a45a8ff 228 (+) Handle RNG interrupt request
bogdanm 0:9b334a45a8ff 229
bogdanm 0:9b334a45a8ff 230 @endverbatim
bogdanm 0:9b334a45a8ff 231 * @{
bogdanm 0:9b334a45a8ff 232 */
bogdanm 0:9b334a45a8ff 233
bogdanm 0:9b334a45a8ff 234 /**
bogdanm 0:9b334a45a8ff 235 * @brief Generates a 32-bit random number.
bogdanm 0:9b334a45a8ff 236 * @note Each time the random number data is read the RNG_FLAG_DRDY flag
bogdanm 0:9b334a45a8ff 237 * is automatically cleared.
bogdanm 0:9b334a45a8ff 238 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
bogdanm 0:9b334a45a8ff 239 * the configuration information for RNG.
bogdanm 0:9b334a45a8ff 240 * @param random32bit: pointer to generated random number variable if successful.
bogdanm 0:9b334a45a8ff 241 * @retval HAL status
bogdanm 0:9b334a45a8ff 242 */
bogdanm 0:9b334a45a8ff 243
bogdanm 0:9b334a45a8ff 244 HAL_StatusTypeDef HAL_RNG_GenerateRandomNumber(RNG_HandleTypeDef *hrng, uint32_t *random32bit)
bogdanm 0:9b334a45a8ff 245 {
bogdanm 0:9b334a45a8ff 246 uint32_t tickstart = 0;
bogdanm 0:9b334a45a8ff 247 HAL_StatusTypeDef status = HAL_OK;
bogdanm 0:9b334a45a8ff 248
bogdanm 0:9b334a45a8ff 249 /* Process Locked */
bogdanm 0:9b334a45a8ff 250 __HAL_LOCK(hrng);
bogdanm 0:9b334a45a8ff 251
bogdanm 0:9b334a45a8ff 252 /* Check RNG peripheral state */
bogdanm 0:9b334a45a8ff 253 if(hrng->State == HAL_RNG_STATE_READY)
bogdanm 0:9b334a45a8ff 254 {
bogdanm 0:9b334a45a8ff 255 /* Change RNG peripheral state */
bogdanm 0:9b334a45a8ff 256 hrng->State = HAL_RNG_STATE_BUSY;
bogdanm 0:9b334a45a8ff 257
bogdanm 0:9b334a45a8ff 258 /* Get tick */
bogdanm 0:9b334a45a8ff 259 tickstart = HAL_GetTick();
bogdanm 0:9b334a45a8ff 260
bogdanm 0:9b334a45a8ff 261 /* Check if data register contains valid random data */
bogdanm 0:9b334a45a8ff 262 while(__HAL_RNG_GET_FLAG(hrng, RNG_FLAG_DRDY) == RESET)
bogdanm 0:9b334a45a8ff 263 {
bogdanm 0:9b334a45a8ff 264 if((HAL_GetTick() - tickstart ) > RNG_TIMEOUT_VALUE)
bogdanm 0:9b334a45a8ff 265 {
bogdanm 0:9b334a45a8ff 266 hrng->State = HAL_RNG_STATE_ERROR;
bogdanm 0:9b334a45a8ff 267
bogdanm 0:9b334a45a8ff 268 /* Process Unlocked */
bogdanm 0:9b334a45a8ff 269 __HAL_UNLOCK(hrng);
bogdanm 0:9b334a45a8ff 270
bogdanm 0:9b334a45a8ff 271 return HAL_TIMEOUT;
bogdanm 0:9b334a45a8ff 272 }
bogdanm 0:9b334a45a8ff 273 }
bogdanm 0:9b334a45a8ff 274
bogdanm 0:9b334a45a8ff 275 /* Get a 32bit Random number */
bogdanm 0:9b334a45a8ff 276 hrng->RandomNumber = hrng->Instance->DR;
bogdanm 0:9b334a45a8ff 277 *random32bit = hrng->RandomNumber;
bogdanm 0:9b334a45a8ff 278
bogdanm 0:9b334a45a8ff 279 hrng->State = HAL_RNG_STATE_READY;
bogdanm 0:9b334a45a8ff 280 }
bogdanm 0:9b334a45a8ff 281 else
bogdanm 0:9b334a45a8ff 282 {
bogdanm 0:9b334a45a8ff 283 status = HAL_ERROR;
bogdanm 0:9b334a45a8ff 284 }
bogdanm 0:9b334a45a8ff 285
bogdanm 0:9b334a45a8ff 286 /* Process Unlocked */
bogdanm 0:9b334a45a8ff 287 __HAL_UNLOCK(hrng);
bogdanm 0:9b334a45a8ff 288
bogdanm 0:9b334a45a8ff 289 return status;
bogdanm 0:9b334a45a8ff 290 }
bogdanm 0:9b334a45a8ff 291
bogdanm 0:9b334a45a8ff 292 /**
bogdanm 0:9b334a45a8ff 293 * @brief Generates a 32-bit random number in interrupt mode.
bogdanm 0:9b334a45a8ff 294 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
bogdanm 0:9b334a45a8ff 295 * the configuration information for RNG.
bogdanm 0:9b334a45a8ff 296 * @retval HAL status
bogdanm 0:9b334a45a8ff 297 */
bogdanm 0:9b334a45a8ff 298 HAL_StatusTypeDef HAL_RNG_GenerateRandomNumber_IT(RNG_HandleTypeDef *hrng)
bogdanm 0:9b334a45a8ff 299 {
bogdanm 0:9b334a45a8ff 300 HAL_StatusTypeDef status = HAL_OK;
bogdanm 0:9b334a45a8ff 301
bogdanm 0:9b334a45a8ff 302 /* Process Locked */
bogdanm 0:9b334a45a8ff 303 __HAL_LOCK(hrng);
bogdanm 0:9b334a45a8ff 304
bogdanm 0:9b334a45a8ff 305 /* Check RNG peripheral state */
bogdanm 0:9b334a45a8ff 306 if(hrng->State == HAL_RNG_STATE_READY)
bogdanm 0:9b334a45a8ff 307 {
bogdanm 0:9b334a45a8ff 308 /* Change RNG peripheral state */
bogdanm 0:9b334a45a8ff 309 hrng->State = HAL_RNG_STATE_BUSY;
bogdanm 0:9b334a45a8ff 310
bogdanm 0:9b334a45a8ff 311 /* Process Unlocked */
bogdanm 0:9b334a45a8ff 312 __HAL_UNLOCK(hrng);
bogdanm 0:9b334a45a8ff 313
bogdanm 0:9b334a45a8ff 314 /* Enable the RNG Interrupts: Data Ready, Clock error, Seed error */
bogdanm 0:9b334a45a8ff 315 __HAL_RNG_ENABLE_IT(hrng);
bogdanm 0:9b334a45a8ff 316 }
bogdanm 0:9b334a45a8ff 317 else
bogdanm 0:9b334a45a8ff 318 {
bogdanm 0:9b334a45a8ff 319 /* Process Unlocked */
bogdanm 0:9b334a45a8ff 320 __HAL_UNLOCK(hrng);
bogdanm 0:9b334a45a8ff 321
bogdanm 0:9b334a45a8ff 322 status = HAL_ERROR;
bogdanm 0:9b334a45a8ff 323 }
bogdanm 0:9b334a45a8ff 324
bogdanm 0:9b334a45a8ff 325 return status;
bogdanm 0:9b334a45a8ff 326 }
bogdanm 0:9b334a45a8ff 327
bogdanm 0:9b334a45a8ff 328 /**
bogdanm 0:9b334a45a8ff 329 * @brief Handles RNG interrupt request.
bogdanm 0:9b334a45a8ff 330 * @note In the case of a clock error, the RNG is no more able to generate
bogdanm 0:9b334a45a8ff 331 * random numbers because the PLL48CLK clock is not correct. User has
bogdanm 0:9b334a45a8ff 332 * to check that the clock controller is correctly configured to provide
bogdanm 0:9b334a45a8ff 333 * the RNG clock and clear the CEIS bit using __HAL_RNG_CLEAR_IT().
bogdanm 0:9b334a45a8ff 334 * The clock error has no impact on the previously generated
bogdanm 0:9b334a45a8ff 335 * random numbers, and the RNG_DR register contents can be used.
bogdanm 0:9b334a45a8ff 336 * @note In the case of a seed error, the generation of random numbers is
bogdanm 0:9b334a45a8ff 337 * interrupted as long as the SECS bit is '1'. If a number is
bogdanm 0:9b334a45a8ff 338 * available in the RNG_DR register, it must not be used because it may
bogdanm 0:9b334a45a8ff 339 * not have enough entropy. In this case, it is recommended to clear the
bogdanm 0:9b334a45a8ff 340 * SEIS bit using __HAL_RNG_CLEAR_IT(), then disable and enable
bogdanm 0:9b334a45a8ff 341 * the RNG peripheral to reinitialize and restart the RNG.
bogdanm 0:9b334a45a8ff 342 * @note User-written HAL_RNG_ErrorCallback() API is called once whether SEIS
bogdanm 0:9b334a45a8ff 343 * or CEIS are set.
bogdanm 0:9b334a45a8ff 344 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
bogdanm 0:9b334a45a8ff 345 * the configuration information for RNG.
bogdanm 0:9b334a45a8ff 346 * @retval None
bogdanm 0:9b334a45a8ff 347
bogdanm 0:9b334a45a8ff 348 */
bogdanm 0:9b334a45a8ff 349 void HAL_RNG_IRQHandler(RNG_HandleTypeDef *hrng)
bogdanm 0:9b334a45a8ff 350 {
bogdanm 0:9b334a45a8ff 351 /* RNG clock error interrupt occurred */
bogdanm 0:9b334a45a8ff 352 if((__HAL_RNG_GET_IT(hrng, RNG_IT_CEI) != RESET) || (__HAL_RNG_GET_IT(hrng, RNG_IT_SEI) != RESET))
bogdanm 0:9b334a45a8ff 353 {
bogdanm 0:9b334a45a8ff 354 /* Change RNG peripheral state */
bogdanm 0:9b334a45a8ff 355 hrng->State = HAL_RNG_STATE_ERROR;
bogdanm 0:9b334a45a8ff 356
bogdanm 0:9b334a45a8ff 357 HAL_RNG_ErrorCallback(hrng);
bogdanm 0:9b334a45a8ff 358
bogdanm 0:9b334a45a8ff 359 /* Clear the clock error flag */
bogdanm 0:9b334a45a8ff 360 __HAL_RNG_CLEAR_IT(hrng, RNG_IT_CEI|RNG_IT_SEI);
bogdanm 0:9b334a45a8ff 361
bogdanm 0:9b334a45a8ff 362 }
bogdanm 0:9b334a45a8ff 363
bogdanm 0:9b334a45a8ff 364 /* Check RNG data ready interrupt occurred */
bogdanm 0:9b334a45a8ff 365 if(__HAL_RNG_GET_IT(hrng, RNG_IT_DRDY) != RESET)
bogdanm 0:9b334a45a8ff 366 {
bogdanm 0:9b334a45a8ff 367 /* Generate random number once, so disable the IT */
bogdanm 0:9b334a45a8ff 368 __HAL_RNG_DISABLE_IT(hrng);
bogdanm 0:9b334a45a8ff 369
bogdanm 0:9b334a45a8ff 370 /* Get the 32bit Random number (DRDY flag automatically cleared) */
bogdanm 0:9b334a45a8ff 371 hrng->RandomNumber = hrng->Instance->DR;
bogdanm 0:9b334a45a8ff 372
bogdanm 0:9b334a45a8ff 373 if(hrng->State != HAL_RNG_STATE_ERROR)
bogdanm 0:9b334a45a8ff 374 {
bogdanm 0:9b334a45a8ff 375 /* Change RNG peripheral state */
bogdanm 0:9b334a45a8ff 376 hrng->State = HAL_RNG_STATE_READY;
bogdanm 0:9b334a45a8ff 377
bogdanm 0:9b334a45a8ff 378 /* Data Ready callback */
bogdanm 0:9b334a45a8ff 379 HAL_RNG_ReadyDataCallback(hrng, hrng->RandomNumber);
bogdanm 0:9b334a45a8ff 380 }
bogdanm 0:9b334a45a8ff 381 }
bogdanm 0:9b334a45a8ff 382 }
bogdanm 0:9b334a45a8ff 383
bogdanm 0:9b334a45a8ff 384 /**
bogdanm 0:9b334a45a8ff 385 * @brief Returns generated random number in polling mode (Obsolete)
bogdanm 0:9b334a45a8ff 386 * Use HAL_RNG_GenerateRandomNumber() API instead.
bogdanm 0:9b334a45a8ff 387 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
bogdanm 0:9b334a45a8ff 388 * the configuration information for RNG.
bogdanm 0:9b334a45a8ff 389 * @retval Random value
bogdanm 0:9b334a45a8ff 390 */
bogdanm 0:9b334a45a8ff 391 uint32_t HAL_RNG_GetRandomNumber(RNG_HandleTypeDef *hrng)
bogdanm 0:9b334a45a8ff 392 {
bogdanm 0:9b334a45a8ff 393 if(HAL_RNG_GenerateRandomNumber(hrng, &(hrng->RandomNumber)) == HAL_OK)
bogdanm 0:9b334a45a8ff 394 {
bogdanm 0:9b334a45a8ff 395 return hrng->RandomNumber;
bogdanm 0:9b334a45a8ff 396 }
bogdanm 0:9b334a45a8ff 397 else
bogdanm 0:9b334a45a8ff 398 {
bogdanm 0:9b334a45a8ff 399 return 0;
bogdanm 0:9b334a45a8ff 400 }
bogdanm 0:9b334a45a8ff 401 }
bogdanm 0:9b334a45a8ff 402
bogdanm 0:9b334a45a8ff 403 /**
bogdanm 0:9b334a45a8ff 404 * @brief Returns a 32-bit random number with interrupt enabled (Obsolete),
bogdanm 0:9b334a45a8ff 405 * Use HAL_RNG_GenerateRandomNumber_IT() API instead.
bogdanm 0:9b334a45a8ff 406 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
bogdanm 0:9b334a45a8ff 407 * the configuration information for RNG.
bogdanm 0:9b334a45a8ff 408 * @retval 32-bit random number
bogdanm 0:9b334a45a8ff 409 */
bogdanm 0:9b334a45a8ff 410 uint32_t HAL_RNG_GetRandomNumber_IT(RNG_HandleTypeDef *hrng)
bogdanm 0:9b334a45a8ff 411 {
bogdanm 0:9b334a45a8ff 412 uint32_t random32bit = 0;
bogdanm 0:9b334a45a8ff 413
bogdanm 0:9b334a45a8ff 414 /* Process locked */
bogdanm 0:9b334a45a8ff 415 __HAL_LOCK(hrng);
bogdanm 0:9b334a45a8ff 416
bogdanm 0:9b334a45a8ff 417 /* Change RNG peripheral state */
bogdanm 0:9b334a45a8ff 418 hrng->State = HAL_RNG_STATE_BUSY;
bogdanm 0:9b334a45a8ff 419
bogdanm 0:9b334a45a8ff 420 /* Get a 32bit Random number */
bogdanm 0:9b334a45a8ff 421 random32bit = hrng->Instance->DR;
bogdanm 0:9b334a45a8ff 422
bogdanm 0:9b334a45a8ff 423 /* Enable the RNG Interrupts: Data Ready, Clock error, Seed error */
bogdanm 0:9b334a45a8ff 424 __HAL_RNG_ENABLE_IT(hrng);
bogdanm 0:9b334a45a8ff 425
bogdanm 0:9b334a45a8ff 426 /* Return the 32 bit random number */
bogdanm 0:9b334a45a8ff 427 return random32bit;
bogdanm 0:9b334a45a8ff 428 }
bogdanm 0:9b334a45a8ff 429
bogdanm 0:9b334a45a8ff 430 /**
bogdanm 0:9b334a45a8ff 431 * @brief Read latest generated random number.
bogdanm 0:9b334a45a8ff 432 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
bogdanm 0:9b334a45a8ff 433 * the configuration information for RNG.
bogdanm 0:9b334a45a8ff 434 * @retval random value
bogdanm 0:9b334a45a8ff 435 */
bogdanm 0:9b334a45a8ff 436 uint32_t HAL_RNG_ReadLastRandomNumber(RNG_HandleTypeDef *hrng)
bogdanm 0:9b334a45a8ff 437 {
bogdanm 0:9b334a45a8ff 438 return(hrng->RandomNumber);
bogdanm 0:9b334a45a8ff 439 }
bogdanm 0:9b334a45a8ff 440
bogdanm 0:9b334a45a8ff 441 /**
bogdanm 0:9b334a45a8ff 442 * @brief Data Ready callback in non-blocking mode.
bogdanm 0:9b334a45a8ff 443 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
bogdanm 0:9b334a45a8ff 444 * the configuration information for RNG.
bogdanm 0:9b334a45a8ff 445 * @param random32bit: generated random number.
bogdanm 0:9b334a45a8ff 446 * @retval None
bogdanm 0:9b334a45a8ff 447 */
bogdanm 0:9b334a45a8ff 448 __weak void HAL_RNG_ReadyDataCallback(RNG_HandleTypeDef *hrng, uint32_t random32bit)
bogdanm 0:9b334a45a8ff 449 {
mbed_official 83:a036322b8637 450 /* Prevent unused argument(s) compilation warning */
mbed_official 83:a036322b8637 451 UNUSED(hrng);
mbed_official 83:a036322b8637 452
bogdanm 0:9b334a45a8ff 453 /* NOTE : This function should not be modified. When the callback is needed,
bogdanm 0:9b334a45a8ff 454 function HAL_RNG_ReadyDataCallback must be implemented in the user file.
bogdanm 0:9b334a45a8ff 455 */
bogdanm 0:9b334a45a8ff 456 }
bogdanm 0:9b334a45a8ff 457
bogdanm 0:9b334a45a8ff 458 /**
bogdanm 0:9b334a45a8ff 459 * @brief RNG error callbacks.
bogdanm 0:9b334a45a8ff 460 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
bogdanm 0:9b334a45a8ff 461 * the configuration information for RNG.
bogdanm 0:9b334a45a8ff 462 * @retval None
bogdanm 0:9b334a45a8ff 463 */
bogdanm 0:9b334a45a8ff 464 __weak void HAL_RNG_ErrorCallback(RNG_HandleTypeDef *hrng)
bogdanm 0:9b334a45a8ff 465 {
mbed_official 83:a036322b8637 466 /* Prevent unused argument(s) compilation warning */
mbed_official 83:a036322b8637 467 UNUSED(hrng);
mbed_official 83:a036322b8637 468
bogdanm 0:9b334a45a8ff 469 /* NOTE : This function should not be modified. When the callback is needed,
bogdanm 0:9b334a45a8ff 470 function HAL_RNG_ErrorCallback must be implemented in the user file.
bogdanm 0:9b334a45a8ff 471 */
bogdanm 0:9b334a45a8ff 472 }
bogdanm 0:9b334a45a8ff 473 /**
bogdanm 0:9b334a45a8ff 474 * @}
bogdanm 0:9b334a45a8ff 475 */
bogdanm 0:9b334a45a8ff 476
bogdanm 0:9b334a45a8ff 477
bogdanm 0:9b334a45a8ff 478 /** @addtogroup RNG_Exported_Functions_Group3
bogdanm 0:9b334a45a8ff 479 * @brief Peripheral State functions
bogdanm 0:9b334a45a8ff 480 *
bogdanm 0:9b334a45a8ff 481 @verbatim
bogdanm 0:9b334a45a8ff 482 ===============================================================================
bogdanm 0:9b334a45a8ff 483 ##### Peripheral State functions #####
bogdanm 0:9b334a45a8ff 484 ===============================================================================
bogdanm 0:9b334a45a8ff 485 [..]
bogdanm 0:9b334a45a8ff 486 This subsection permits to get in run-time the status of the peripheral
bogdanm 0:9b334a45a8ff 487 and the data flow.
bogdanm 0:9b334a45a8ff 488
bogdanm 0:9b334a45a8ff 489 @endverbatim
bogdanm 0:9b334a45a8ff 490 * @{
bogdanm 0:9b334a45a8ff 491 */
bogdanm 0:9b334a45a8ff 492
bogdanm 0:9b334a45a8ff 493 /**
bogdanm 0:9b334a45a8ff 494 * @brief Returns the RNG state.
bogdanm 0:9b334a45a8ff 495 * @param hrng: pointer to a RNG_HandleTypeDef structure that contains
bogdanm 0:9b334a45a8ff 496 * the configuration information for RNG.
bogdanm 0:9b334a45a8ff 497 * @retval HAL state
bogdanm 0:9b334a45a8ff 498 */
bogdanm 0:9b334a45a8ff 499 HAL_RNG_StateTypeDef HAL_RNG_GetState(RNG_HandleTypeDef *hrng)
bogdanm 0:9b334a45a8ff 500 {
bogdanm 0:9b334a45a8ff 501 return hrng->State;
bogdanm 0:9b334a45a8ff 502 }
bogdanm 0:9b334a45a8ff 503
bogdanm 0:9b334a45a8ff 504 /**
bogdanm 0:9b334a45a8ff 505 * @}
bogdanm 0:9b334a45a8ff 506 */
bogdanm 0:9b334a45a8ff 507
bogdanm 0:9b334a45a8ff 508 /**
bogdanm 0:9b334a45a8ff 509 * @}
bogdanm 0:9b334a45a8ff 510 */
bogdanm 0:9b334a45a8ff 511
bogdanm 0:9b334a45a8ff 512 #endif /* HAL_RNG_MODULE_ENABLED */
bogdanm 0:9b334a45a8ff 513
bogdanm 0:9b334a45a8ff 514 /**
bogdanm 0:9b334a45a8ff 515 * @}
bogdanm 0:9b334a45a8ff 516 */
bogdanm 0:9b334a45a8ff 517
bogdanm 0:9b334a45a8ff 518 /**
bogdanm 0:9b334a45a8ff 519 * @}
bogdanm 0:9b334a45a8ff 520 */
bogdanm 0:9b334a45a8ff 521
bogdanm 0:9b334a45a8ff 522 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/