mbed library sources
Fork of mbed-src by
targets/cmsis/TARGET_STM/TARGET_STM32L4/stm32l4xx_hal_rng.c@637:ed69428d4850, 2015-12-22 (annotated)
- Committer:
- jaerts
- Date:
- Tue Dec 22 13:22:16 2015 +0000
- Revision:
- 637:ed69428d4850
- Parent:
- 610:813dcc80987e
Add very shady LPC1768 CAN Filter implementation
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
mbed_official | 610:813dcc80987e | 1 | /** |
mbed_official | 610:813dcc80987e | 2 | ****************************************************************************** |
mbed_official | 610:813dcc80987e | 3 | * @file stm32l4xx_hal_rng.c |
mbed_official | 610:813dcc80987e | 4 | * @author MCD Application Team |
mbed_official | 610:813dcc80987e | 5 | * @version V1.0.0 |
mbed_official | 610:813dcc80987e | 6 | * @date 26-June-2015 |
mbed_official | 610:813dcc80987e | 7 | * @brief RNG HAL module driver. |
mbed_official | 610:813dcc80987e | 8 | * This file provides firmware functions to manage the following |
mbed_official | 610:813dcc80987e | 9 | * functionalities of the Random Number Generator (RNG) peripheral: |
mbed_official | 610:813dcc80987e | 10 | * + Initialization/de-initialization functions |
mbed_official | 610:813dcc80987e | 11 | * + Peripheral Control functions |
mbed_official | 610:813dcc80987e | 12 | * + Peripheral State functions |
mbed_official | 610:813dcc80987e | 13 | * |
mbed_official | 610:813dcc80987e | 14 | @verbatim |
mbed_official | 610:813dcc80987e | 15 | ============================================================================== |
mbed_official | 610:813dcc80987e | 16 | ##### How to use this driver ##### |
mbed_official | 610:813dcc80987e | 17 | ============================================================================== |
mbed_official | 610:813dcc80987e | 18 | [..] |
mbed_official | 610:813dcc80987e | 19 | The RNG HAL driver can be used as follows: |
mbed_official | 610:813dcc80987e | 20 | |
mbed_official | 610:813dcc80987e | 21 | (#) Enable the RNG controller clock using __HAL_RCC_RNG_CLK_ENABLE() macro |
mbed_official | 610:813dcc80987e | 22 | in HAL_RNG_MspInit(). |
mbed_official | 610:813dcc80987e | 23 | (#) Activate the RNG peripheral using HAL_RNG_Init() function. |
mbed_official | 610:813dcc80987e | 24 | (#) Wait until the 32-bit Random Number Generator contains a valid |
mbed_official | 610:813dcc80987e | 25 | random data using (polling/interrupt) mode. |
mbed_official | 610:813dcc80987e | 26 | (#) Get the 32 bit random number using HAL_RNG_GenerateRandomNumber() function. |
mbed_official | 610:813dcc80987e | 27 | |
mbed_official | 610:813dcc80987e | 28 | @endverbatim |
mbed_official | 610:813dcc80987e | 29 | ****************************************************************************** |
mbed_official | 610:813dcc80987e | 30 | * @attention |
mbed_official | 610:813dcc80987e | 31 | * |
mbed_official | 610:813dcc80987e | 32 | * <h2><center>© COPYRIGHT(c) 2015 STMicroelectronics</center></h2> |
mbed_official | 610:813dcc80987e | 33 | * |
mbed_official | 610:813dcc80987e | 34 | * Redistribution and use in source and binary forms, with or without modification, |
mbed_official | 610:813dcc80987e | 35 | * are permitted provided that the following conditions are met: |
mbed_official | 610:813dcc80987e | 36 | * 1. Redistributions of source code must retain the above copyright notice, |
mbed_official | 610:813dcc80987e | 37 | * this list of conditions and the following disclaimer. |
mbed_official | 610:813dcc80987e | 38 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
mbed_official | 610:813dcc80987e | 39 | * this list of conditions and the following disclaimer in the documentation |
mbed_official | 610:813dcc80987e | 40 | * and/or other materials provided with the distribution. |
mbed_official | 610:813dcc80987e | 41 | * 3. Neither the name of STMicroelectronics nor the names of its contributors |
mbed_official | 610:813dcc80987e | 42 | * may be used to endorse or promote products derived from this software |
mbed_official | 610:813dcc80987e | 43 | * without specific prior written permission. |
mbed_official | 610:813dcc80987e | 44 | * |
mbed_official | 610:813dcc80987e | 45 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
mbed_official | 610:813dcc80987e | 46 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
mbed_official | 610:813dcc80987e | 47 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
mbed_official | 610:813dcc80987e | 48 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
mbed_official | 610:813dcc80987e | 49 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
mbed_official | 610:813dcc80987e | 50 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
mbed_official | 610:813dcc80987e | 51 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
mbed_official | 610:813dcc80987e | 52 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
mbed_official | 610:813dcc80987e | 53 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
mbed_official | 610:813dcc80987e | 54 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
mbed_official | 610:813dcc80987e | 55 | * |
mbed_official | 610:813dcc80987e | 56 | ****************************************************************************** |
mbed_official | 610:813dcc80987e | 57 | */ |
mbed_official | 610:813dcc80987e | 58 | |
mbed_official | 610:813dcc80987e | 59 | /* Includes ------------------------------------------------------------------*/ |
mbed_official | 610:813dcc80987e | 60 | #include "stm32l4xx_hal.h" |
mbed_official | 610:813dcc80987e | 61 | |
mbed_official | 610:813dcc80987e | 62 | /** @addtogroup STM32L4xx_HAL_Driver |
mbed_official | 610:813dcc80987e | 63 | * @{ |
mbed_official | 610:813dcc80987e | 64 | */ |
mbed_official | 610:813dcc80987e | 65 | |
mbed_official | 610:813dcc80987e | 66 | /** @defgroup RNG RNG |
mbed_official | 610:813dcc80987e | 67 | * @brief RNG HAL module driver. |
mbed_official | 610:813dcc80987e | 68 | * @{ |
mbed_official | 610:813dcc80987e | 69 | */ |
mbed_official | 610:813dcc80987e | 70 | |
mbed_official | 610:813dcc80987e | 71 | #ifdef HAL_RNG_MODULE_ENABLED |
mbed_official | 610:813dcc80987e | 72 | |
mbed_official | 610:813dcc80987e | 73 | |
mbed_official | 610:813dcc80987e | 74 | |
mbed_official | 610:813dcc80987e | 75 | /* Private types -------------------------------------------------------------*/ |
mbed_official | 610:813dcc80987e | 76 | /* Private defines -----------------------------------------------------------*/ |
mbed_official | 610:813dcc80987e | 77 | /** @defgroup RNG_Private_Constants RNG_Private_Constants |
mbed_official | 610:813dcc80987e | 78 | * @{ |
mbed_official | 610:813dcc80987e | 79 | */ |
mbed_official | 610:813dcc80987e | 80 | #define RNG_TIMEOUT_VALUE 2 |
mbed_official | 610:813dcc80987e | 81 | /** |
mbed_official | 610:813dcc80987e | 82 | * @} |
mbed_official | 610:813dcc80987e | 83 | */ |
mbed_official | 610:813dcc80987e | 84 | |
mbed_official | 610:813dcc80987e | 85 | /* Private macros ------------------------------------------------------------*/ |
mbed_official | 610:813dcc80987e | 86 | /* Private variables ---------------------------------------------------------*/ |
mbed_official | 610:813dcc80987e | 87 | /* Private function prototypes -----------------------------------------------*/ |
mbed_official | 610:813dcc80987e | 88 | /* Private functions ---------------------------------------------------------*/ |
mbed_official | 610:813dcc80987e | 89 | /* Exported functions --------------------------------------------------------*/ |
mbed_official | 610:813dcc80987e | 90 | |
mbed_official | 610:813dcc80987e | 91 | /** @addtogroup RNG_Exported_Functions |
mbed_official | 610:813dcc80987e | 92 | * @{ |
mbed_official | 610:813dcc80987e | 93 | */ |
mbed_official | 610:813dcc80987e | 94 | |
mbed_official | 610:813dcc80987e | 95 | /** @addtogroup RNG_Exported_Functions_Group1 |
mbed_official | 610:813dcc80987e | 96 | * @brief Initialization and de-initialization functions |
mbed_official | 610:813dcc80987e | 97 | * |
mbed_official | 610:813dcc80987e | 98 | @verbatim |
mbed_official | 610:813dcc80987e | 99 | =============================================================================== |
mbed_official | 610:813dcc80987e | 100 | ##### Initialization and de-initialization functions ##### |
mbed_official | 610:813dcc80987e | 101 | =============================================================================== |
mbed_official | 610:813dcc80987e | 102 | [..] This section provides functions allowing to: |
mbed_official | 610:813dcc80987e | 103 | (+) Initialize the RNG according to the specified parameters |
mbed_official | 610:813dcc80987e | 104 | in the RNG_InitTypeDef and create the associated handle |
mbed_official | 610:813dcc80987e | 105 | (+) DeInitialize the RNG peripheral |
mbed_official | 610:813dcc80987e | 106 | (+) Initialize the RNG MSP (MCU Specific Package) |
mbed_official | 610:813dcc80987e | 107 | (+) DeInitialize the RNG MSP |
mbed_official | 610:813dcc80987e | 108 | |
mbed_official | 610:813dcc80987e | 109 | @endverbatim |
mbed_official | 610:813dcc80987e | 110 | * @{ |
mbed_official | 610:813dcc80987e | 111 | */ |
mbed_official | 610:813dcc80987e | 112 | |
mbed_official | 610:813dcc80987e | 113 | /** |
mbed_official | 610:813dcc80987e | 114 | * @brief Initialize the RNG peripheral and initialize the associated handle. |
mbed_official | 610:813dcc80987e | 115 | * @param hrng: pointer to a RNG_HandleTypeDef structure. |
mbed_official | 610:813dcc80987e | 116 | * @retval HAL status |
mbed_official | 610:813dcc80987e | 117 | */ |
mbed_official | 610:813dcc80987e | 118 | HAL_StatusTypeDef HAL_RNG_Init(RNG_HandleTypeDef *hrng) |
mbed_official | 610:813dcc80987e | 119 | { |
mbed_official | 610:813dcc80987e | 120 | /* Check the RNG handle allocation */ |
mbed_official | 610:813dcc80987e | 121 | if(hrng == NULL) |
mbed_official | 610:813dcc80987e | 122 | { |
mbed_official | 610:813dcc80987e | 123 | return HAL_ERROR; |
mbed_official | 610:813dcc80987e | 124 | } |
mbed_official | 610:813dcc80987e | 125 | |
mbed_official | 610:813dcc80987e | 126 | assert_param(IS_RNG_ALL_INSTANCE(hrng->Instance)); |
mbed_official | 610:813dcc80987e | 127 | |
mbed_official | 610:813dcc80987e | 128 | __HAL_LOCK(hrng); |
mbed_official | 610:813dcc80987e | 129 | |
mbed_official | 610:813dcc80987e | 130 | if(hrng->State == HAL_RNG_STATE_RESET) |
mbed_official | 610:813dcc80987e | 131 | { |
mbed_official | 610:813dcc80987e | 132 | /* Allocate lock resource and initialize it */ |
mbed_official | 610:813dcc80987e | 133 | hrng->Lock = HAL_UNLOCKED; |
mbed_official | 610:813dcc80987e | 134 | |
mbed_official | 610:813dcc80987e | 135 | /* Init the low level hardware */ |
mbed_official | 610:813dcc80987e | 136 | HAL_RNG_MspInit(hrng); |
mbed_official | 610:813dcc80987e | 137 | } |
mbed_official | 610:813dcc80987e | 138 | |
mbed_official | 610:813dcc80987e | 139 | /* Change RNG peripheral state */ |
mbed_official | 610:813dcc80987e | 140 | hrng->State = HAL_RNG_STATE_BUSY; |
mbed_official | 610:813dcc80987e | 141 | |
mbed_official | 610:813dcc80987e | 142 | /* Enable the RNG Peripheral */ |
mbed_official | 610:813dcc80987e | 143 | __HAL_RNG_ENABLE(hrng); |
mbed_official | 610:813dcc80987e | 144 | |
mbed_official | 610:813dcc80987e | 145 | /* Initialize the RNG state */ |
mbed_official | 610:813dcc80987e | 146 | hrng->State = HAL_RNG_STATE_READY; |
mbed_official | 610:813dcc80987e | 147 | |
mbed_official | 610:813dcc80987e | 148 | __HAL_UNLOCK(hrng); |
mbed_official | 610:813dcc80987e | 149 | |
mbed_official | 610:813dcc80987e | 150 | /* Return function status */ |
mbed_official | 610:813dcc80987e | 151 | return HAL_OK; |
mbed_official | 610:813dcc80987e | 152 | } |
mbed_official | 610:813dcc80987e | 153 | |
mbed_official | 610:813dcc80987e | 154 | /** |
mbed_official | 610:813dcc80987e | 155 | * @brief DeInitialize the RNG peripheral. |
mbed_official | 610:813dcc80987e | 156 | * @param hrng: pointer to a RNG_HandleTypeDef structure. |
mbed_official | 610:813dcc80987e | 157 | * @retval HAL status |
mbed_official | 610:813dcc80987e | 158 | */ |
mbed_official | 610:813dcc80987e | 159 | HAL_StatusTypeDef HAL_RNG_DeInit(RNG_HandleTypeDef *hrng) |
mbed_official | 610:813dcc80987e | 160 | { |
mbed_official | 610:813dcc80987e | 161 | /* Check the RNG handle allocation */ |
mbed_official | 610:813dcc80987e | 162 | if(hrng == NULL) |
mbed_official | 610:813dcc80987e | 163 | { |
mbed_official | 610:813dcc80987e | 164 | return HAL_ERROR; |
mbed_official | 610:813dcc80987e | 165 | } |
mbed_official | 610:813dcc80987e | 166 | /* Disable the RNG Peripheral */ |
mbed_official | 610:813dcc80987e | 167 | CLEAR_BIT(hrng->Instance->CR, RNG_CR_IE | RNG_CR_RNGEN); |
mbed_official | 610:813dcc80987e | 168 | |
mbed_official | 610:813dcc80987e | 169 | /* Clear RNG interrupt status flags */ |
mbed_official | 610:813dcc80987e | 170 | CLEAR_BIT(hrng->Instance->SR, RNG_SR_CEIS | RNG_SR_SEIS); |
mbed_official | 610:813dcc80987e | 171 | |
mbed_official | 610:813dcc80987e | 172 | /* DeInit the low level hardware */ |
mbed_official | 610:813dcc80987e | 173 | HAL_RNG_MspDeInit(hrng); |
mbed_official | 610:813dcc80987e | 174 | |
mbed_official | 610:813dcc80987e | 175 | /* Update the RNG state */ |
mbed_official | 610:813dcc80987e | 176 | hrng->State = HAL_RNG_STATE_RESET; |
mbed_official | 610:813dcc80987e | 177 | |
mbed_official | 610:813dcc80987e | 178 | /* Release Lock */ |
mbed_official | 610:813dcc80987e | 179 | __HAL_UNLOCK(hrng); |
mbed_official | 610:813dcc80987e | 180 | |
mbed_official | 610:813dcc80987e | 181 | /* Return the function status */ |
mbed_official | 610:813dcc80987e | 182 | return HAL_OK; |
mbed_official | 610:813dcc80987e | 183 | } |
mbed_official | 610:813dcc80987e | 184 | |
mbed_official | 610:813dcc80987e | 185 | /** |
mbed_official | 610:813dcc80987e | 186 | * @brief Initialize the RNG MSP. |
mbed_official | 610:813dcc80987e | 187 | * @param hrng: pointer to a RNG_HandleTypeDef structure. |
mbed_official | 610:813dcc80987e | 188 | * @retval None |
mbed_official | 610:813dcc80987e | 189 | */ |
mbed_official | 610:813dcc80987e | 190 | __weak void HAL_RNG_MspInit(RNG_HandleTypeDef *hrng) |
mbed_official | 610:813dcc80987e | 191 | { |
mbed_official | 610:813dcc80987e | 192 | /* NOTE : This function should not be modified. When the callback is needed, |
mbed_official | 610:813dcc80987e | 193 | function HAL_RNG_MspInit must be implemented in the user file. |
mbed_official | 610:813dcc80987e | 194 | */ |
mbed_official | 610:813dcc80987e | 195 | } |
mbed_official | 610:813dcc80987e | 196 | |
mbed_official | 610:813dcc80987e | 197 | /** |
mbed_official | 610:813dcc80987e | 198 | * @brief DeInitialize the RNG MSP. |
mbed_official | 610:813dcc80987e | 199 | * @param hrng: pointer to a RNG_HandleTypeDef structure. |
mbed_official | 610:813dcc80987e | 200 | * @retval None |
mbed_official | 610:813dcc80987e | 201 | */ |
mbed_official | 610:813dcc80987e | 202 | __weak void HAL_RNG_MspDeInit(RNG_HandleTypeDef *hrng) |
mbed_official | 610:813dcc80987e | 203 | { |
mbed_official | 610:813dcc80987e | 204 | /* NOTE : This function should not be modified. When the callback is needed, |
mbed_official | 610:813dcc80987e | 205 | function HAL_RNG_MspDeInit must be implemented in the user file. |
mbed_official | 610:813dcc80987e | 206 | */ |
mbed_official | 610:813dcc80987e | 207 | } |
mbed_official | 610:813dcc80987e | 208 | |
mbed_official | 610:813dcc80987e | 209 | /** |
mbed_official | 610:813dcc80987e | 210 | * @} |
mbed_official | 610:813dcc80987e | 211 | */ |
mbed_official | 610:813dcc80987e | 212 | |
mbed_official | 610:813dcc80987e | 213 | /** @addtogroup RNG_Exported_Functions_Group2 |
mbed_official | 610:813dcc80987e | 214 | * @brief Management functions. |
mbed_official | 610:813dcc80987e | 215 | * |
mbed_official | 610:813dcc80987e | 216 | @verbatim |
mbed_official | 610:813dcc80987e | 217 | =============================================================================== |
mbed_official | 610:813dcc80987e | 218 | ##### Peripheral Control functions ##### |
mbed_official | 610:813dcc80987e | 219 | =============================================================================== |
mbed_official | 610:813dcc80987e | 220 | [..] This section provides functions allowing to: |
mbed_official | 610:813dcc80987e | 221 | (+) Get the 32 bit Random number |
mbed_official | 610:813dcc80987e | 222 | (+) Get the 32 bit Random number with interrupt enabled |
mbed_official | 610:813dcc80987e | 223 | (+) Handle RNG interrupt request |
mbed_official | 610:813dcc80987e | 224 | |
mbed_official | 610:813dcc80987e | 225 | @endverbatim |
mbed_official | 610:813dcc80987e | 226 | * @{ |
mbed_official | 610:813dcc80987e | 227 | */ |
mbed_official | 610:813dcc80987e | 228 | |
mbed_official | 610:813dcc80987e | 229 | /** |
mbed_official | 610:813dcc80987e | 230 | * @brief Generate a 32-bit random number. |
mbed_official | 610:813dcc80987e | 231 | * @note Each time the random number data is read the RNG_FLAG_DRDY flag |
mbed_official | 610:813dcc80987e | 232 | * is automatically cleared. |
mbed_official | 610:813dcc80987e | 233 | * @param hrng: pointer to a RNG_HandleTypeDef structure. |
mbed_official | 610:813dcc80987e | 234 | * @param random32bit: pointer to generated random number variable if successful. |
mbed_official | 610:813dcc80987e | 235 | * @retval HAL status |
mbed_official | 610:813dcc80987e | 236 | */ |
mbed_official | 610:813dcc80987e | 237 | |
mbed_official | 610:813dcc80987e | 238 | HAL_StatusTypeDef HAL_RNG_GenerateRandomNumber(RNG_HandleTypeDef *hrng, uint32_t *random32bit) |
mbed_official | 610:813dcc80987e | 239 | { |
mbed_official | 610:813dcc80987e | 240 | uint32_t tickstart = 0; |
mbed_official | 610:813dcc80987e | 241 | HAL_StatusTypeDef status = HAL_OK; |
mbed_official | 610:813dcc80987e | 242 | |
mbed_official | 610:813dcc80987e | 243 | /* Process Locked */ |
mbed_official | 610:813dcc80987e | 244 | __HAL_LOCK(hrng); |
mbed_official | 610:813dcc80987e | 245 | |
mbed_official | 610:813dcc80987e | 246 | /* Check RNS peripheral state */ |
mbed_official | 610:813dcc80987e | 247 | if(hrng->State == HAL_RNG_STATE_READY) |
mbed_official | 610:813dcc80987e | 248 | { |
mbed_official | 610:813dcc80987e | 249 | /* Change RNG peripheral state */ |
mbed_official | 610:813dcc80987e | 250 | hrng->State = HAL_RNG_STATE_BUSY; |
mbed_official | 610:813dcc80987e | 251 | |
mbed_official | 610:813dcc80987e | 252 | /* Get tick */ |
mbed_official | 610:813dcc80987e | 253 | tickstart = HAL_GetTick(); |
mbed_official | 610:813dcc80987e | 254 | |
mbed_official | 610:813dcc80987e | 255 | /* Check if data register contains valid random data */ |
mbed_official | 610:813dcc80987e | 256 | while(__HAL_RNG_GET_FLAG(hrng, RNG_FLAG_DRDY) == RESET) |
mbed_official | 610:813dcc80987e | 257 | { |
mbed_official | 610:813dcc80987e | 258 | if((HAL_GetTick() - tickstart ) > RNG_TIMEOUT_VALUE) |
mbed_official | 610:813dcc80987e | 259 | { |
mbed_official | 610:813dcc80987e | 260 | hrng->State = HAL_RNG_STATE_ERROR; |
mbed_official | 610:813dcc80987e | 261 | |
mbed_official | 610:813dcc80987e | 262 | /* Process Unlocked */ |
mbed_official | 610:813dcc80987e | 263 | __HAL_UNLOCK(hrng); |
mbed_official | 610:813dcc80987e | 264 | |
mbed_official | 610:813dcc80987e | 265 | return HAL_TIMEOUT; |
mbed_official | 610:813dcc80987e | 266 | } |
mbed_official | 610:813dcc80987e | 267 | } |
mbed_official | 610:813dcc80987e | 268 | |
mbed_official | 610:813dcc80987e | 269 | /* Get a 32bit Random number */ |
mbed_official | 610:813dcc80987e | 270 | hrng->RandomNumber = hrng->Instance->DR; |
mbed_official | 610:813dcc80987e | 271 | *random32bit = hrng->RandomNumber; |
mbed_official | 610:813dcc80987e | 272 | |
mbed_official | 610:813dcc80987e | 273 | hrng->State = HAL_RNG_STATE_READY; |
mbed_official | 610:813dcc80987e | 274 | } |
mbed_official | 610:813dcc80987e | 275 | else |
mbed_official | 610:813dcc80987e | 276 | { |
mbed_official | 610:813dcc80987e | 277 | status = HAL_ERROR; |
mbed_official | 610:813dcc80987e | 278 | } |
mbed_official | 610:813dcc80987e | 279 | |
mbed_official | 610:813dcc80987e | 280 | /* Process Unlocked */ |
mbed_official | 610:813dcc80987e | 281 | __HAL_UNLOCK(hrng); |
mbed_official | 610:813dcc80987e | 282 | |
mbed_official | 610:813dcc80987e | 283 | return status; |
mbed_official | 610:813dcc80987e | 284 | } |
mbed_official | 610:813dcc80987e | 285 | |
mbed_official | 610:813dcc80987e | 286 | /** |
mbed_official | 610:813dcc80987e | 287 | * @brief Generate a 32-bit random number in interrupt mode. |
mbed_official | 610:813dcc80987e | 288 | * @param hrng: pointer to a RNG_HandleTypeDef structure. |
mbed_official | 610:813dcc80987e | 289 | * @retval HAL status |
mbed_official | 610:813dcc80987e | 290 | */ |
mbed_official | 610:813dcc80987e | 291 | HAL_StatusTypeDef HAL_RNG_GenerateRandomNumber_IT(RNG_HandleTypeDef *hrng) |
mbed_official | 610:813dcc80987e | 292 | { |
mbed_official | 610:813dcc80987e | 293 | HAL_StatusTypeDef status = HAL_OK; |
mbed_official | 610:813dcc80987e | 294 | |
mbed_official | 610:813dcc80987e | 295 | /* Process Locked */ |
mbed_official | 610:813dcc80987e | 296 | __HAL_LOCK(hrng); |
mbed_official | 610:813dcc80987e | 297 | |
mbed_official | 610:813dcc80987e | 298 | /* Check RNG peripheral state */ |
mbed_official | 610:813dcc80987e | 299 | if(hrng->State == HAL_RNG_STATE_READY) |
mbed_official | 610:813dcc80987e | 300 | { |
mbed_official | 610:813dcc80987e | 301 | /* Change RNG peripheral state */ |
mbed_official | 610:813dcc80987e | 302 | hrng->State = HAL_RNG_STATE_BUSY; |
mbed_official | 610:813dcc80987e | 303 | |
mbed_official | 610:813dcc80987e | 304 | /* Process Unlocked */ |
mbed_official | 610:813dcc80987e | 305 | __HAL_UNLOCK(hrng); |
mbed_official | 610:813dcc80987e | 306 | |
mbed_official | 610:813dcc80987e | 307 | /* Enable the RNG Interrupts: Data Ready, Clock error, Seed error */ |
mbed_official | 610:813dcc80987e | 308 | __HAL_RNG_ENABLE_IT(hrng); |
mbed_official | 610:813dcc80987e | 309 | } |
mbed_official | 610:813dcc80987e | 310 | else |
mbed_official | 610:813dcc80987e | 311 | { |
mbed_official | 610:813dcc80987e | 312 | /* Process Unlocked */ |
mbed_official | 610:813dcc80987e | 313 | __HAL_UNLOCK(hrng); |
mbed_official | 610:813dcc80987e | 314 | |
mbed_official | 610:813dcc80987e | 315 | status = HAL_ERROR; |
mbed_official | 610:813dcc80987e | 316 | } |
mbed_official | 610:813dcc80987e | 317 | |
mbed_official | 610:813dcc80987e | 318 | return status; |
mbed_official | 610:813dcc80987e | 319 | } |
mbed_official | 610:813dcc80987e | 320 | |
mbed_official | 610:813dcc80987e | 321 | /** |
mbed_official | 610:813dcc80987e | 322 | * @brief Handle RNG interrupt request. |
mbed_official | 610:813dcc80987e | 323 | * @note In the case of a clock error, the RNG is no more able to generate |
mbed_official | 610:813dcc80987e | 324 | * random numbers because the PLL48CLK clock is not correct. User has |
mbed_official | 610:813dcc80987e | 325 | * to check that the clock controller is correctly configured to provide |
mbed_official | 610:813dcc80987e | 326 | * the RNG clock and clear the CEIS bit using __HAL_RNG_CLEAR_IT(). |
mbed_official | 610:813dcc80987e | 327 | * The clock error has no impact on the previously generated |
mbed_official | 610:813dcc80987e | 328 | * random numbers, and the RNG_DR register contents can be used. |
mbed_official | 610:813dcc80987e | 329 | * @note In the case of a seed error, the generation of random numbers is |
mbed_official | 610:813dcc80987e | 330 | * interrupted as long as the SECS bit is '1'. If a number is |
mbed_official | 610:813dcc80987e | 331 | * available in the RNG_DR register, it must not be used because it may |
mbed_official | 610:813dcc80987e | 332 | * not have enough entropy. In this case, it is recommended to clear the |
mbed_official | 610:813dcc80987e | 333 | * SEIS bit using __HAL_RNG_CLEAR_IT(), then disable and enable |
mbed_official | 610:813dcc80987e | 334 | * the RNG peripheral to reinitialize and restart the RNG. |
mbed_official | 610:813dcc80987e | 335 | * @note User-written HAL_RNG_ErrorCallback() API is called once whether SEIS |
mbed_official | 610:813dcc80987e | 336 | * or CEIS are set. |
mbed_official | 610:813dcc80987e | 337 | * @param hrng: pointer to a RNG_HandleTypeDef structure. |
mbed_official | 610:813dcc80987e | 338 | * @retval None |
mbed_official | 610:813dcc80987e | 339 | |
mbed_official | 610:813dcc80987e | 340 | */ |
mbed_official | 610:813dcc80987e | 341 | void HAL_RNG_IRQHandler(RNG_HandleTypeDef *hrng) |
mbed_official | 610:813dcc80987e | 342 | { |
mbed_official | 610:813dcc80987e | 343 | /* RNG clock error interrupt occurred */ |
mbed_official | 610:813dcc80987e | 344 | if((__HAL_RNG_GET_IT(hrng, RNG_IT_CEI) != RESET) || (__HAL_RNG_GET_IT(hrng, RNG_IT_SEI) != RESET)) |
mbed_official | 610:813dcc80987e | 345 | { |
mbed_official | 610:813dcc80987e | 346 | /* Change RNG peripheral state */ |
mbed_official | 610:813dcc80987e | 347 | hrng->State = HAL_RNG_STATE_ERROR; |
mbed_official | 610:813dcc80987e | 348 | |
mbed_official | 610:813dcc80987e | 349 | HAL_RNG_ErrorCallback(hrng); |
mbed_official | 610:813dcc80987e | 350 | |
mbed_official | 610:813dcc80987e | 351 | /* Clear the clock error flag */ |
mbed_official | 610:813dcc80987e | 352 | __HAL_RNG_CLEAR_IT(hrng, RNG_IT_CEI|RNG_IT_SEI); |
mbed_official | 610:813dcc80987e | 353 | |
mbed_official | 610:813dcc80987e | 354 | } |
mbed_official | 610:813dcc80987e | 355 | |
mbed_official | 610:813dcc80987e | 356 | /* Check RNG data ready interrupt occurred */ |
mbed_official | 610:813dcc80987e | 357 | if(__HAL_RNG_GET_IT(hrng, RNG_IT_DRDY) != RESET) |
mbed_official | 610:813dcc80987e | 358 | { |
mbed_official | 610:813dcc80987e | 359 | /* Generate random number once, so disable the IT */ |
mbed_official | 610:813dcc80987e | 360 | __HAL_RNG_DISABLE_IT(hrng); |
mbed_official | 610:813dcc80987e | 361 | |
mbed_official | 610:813dcc80987e | 362 | /* Get the 32bit Random number (DRDY flag automatically cleared) */ |
mbed_official | 610:813dcc80987e | 363 | hrng->RandomNumber = hrng->Instance->DR; |
mbed_official | 610:813dcc80987e | 364 | |
mbed_official | 610:813dcc80987e | 365 | if(hrng->State != HAL_RNG_STATE_ERROR) |
mbed_official | 610:813dcc80987e | 366 | { |
mbed_official | 610:813dcc80987e | 367 | /* Change RNG peripheral state */ |
mbed_official | 610:813dcc80987e | 368 | hrng->State = HAL_RNG_STATE_READY; |
mbed_official | 610:813dcc80987e | 369 | |
mbed_official | 610:813dcc80987e | 370 | /* Data Ready callback */ |
mbed_official | 610:813dcc80987e | 371 | HAL_RNG_ReadyDataCallback(hrng, hrng->RandomNumber); |
mbed_official | 610:813dcc80987e | 372 | } |
mbed_official | 610:813dcc80987e | 373 | } |
mbed_official | 610:813dcc80987e | 374 | } |
mbed_official | 610:813dcc80987e | 375 | |
mbed_official | 610:813dcc80987e | 376 | /** |
mbed_official | 610:813dcc80987e | 377 | * @brief Return generated random number in polling mode (Obsolete). |
mbed_official | 610:813dcc80987e | 378 | * @note Use HAL_RNG_GenerateRandomNumber() API instead. |
mbed_official | 610:813dcc80987e | 379 | * @param hrng: pointer to a RNG_HandleTypeDef structure that contains |
mbed_official | 610:813dcc80987e | 380 | * the configuration information for RNG. |
mbed_official | 610:813dcc80987e | 381 | * @retval random value |
mbed_official | 610:813dcc80987e | 382 | */ |
mbed_official | 610:813dcc80987e | 383 | uint32_t HAL_RNG_GetRandomNumber(RNG_HandleTypeDef *hrng) |
mbed_official | 610:813dcc80987e | 384 | { |
mbed_official | 610:813dcc80987e | 385 | if(HAL_RNG_GenerateRandomNumber(hrng, &(hrng->RandomNumber)) == HAL_OK) |
mbed_official | 610:813dcc80987e | 386 | { |
mbed_official | 610:813dcc80987e | 387 | return hrng->RandomNumber; |
mbed_official | 610:813dcc80987e | 388 | } |
mbed_official | 610:813dcc80987e | 389 | else |
mbed_official | 610:813dcc80987e | 390 | { |
mbed_official | 610:813dcc80987e | 391 | return 0; |
mbed_official | 610:813dcc80987e | 392 | } |
mbed_official | 610:813dcc80987e | 393 | } |
mbed_official | 610:813dcc80987e | 394 | |
mbed_official | 610:813dcc80987e | 395 | |
mbed_official | 610:813dcc80987e | 396 | /** |
mbed_official | 610:813dcc80987e | 397 | * @brief Return a 32-bit random number with interrupt enabled (Obsolete). |
mbed_official | 610:813dcc80987e | 398 | * @note Use HAL_RNG_GenerateRandomNumber_IT() API instead. |
mbed_official | 610:813dcc80987e | 399 | * @param hrng: RNG handle |
mbed_official | 610:813dcc80987e | 400 | * @retval 32-bit random number |
mbed_official | 610:813dcc80987e | 401 | */ |
mbed_official | 610:813dcc80987e | 402 | uint32_t HAL_RNG_GetRandomNumber_IT(RNG_HandleTypeDef *hrng) |
mbed_official | 610:813dcc80987e | 403 | { |
mbed_official | 610:813dcc80987e | 404 | uint32_t random32bit = 0; |
mbed_official | 610:813dcc80987e | 405 | |
mbed_official | 610:813dcc80987e | 406 | /* Process locked */ |
mbed_official | 610:813dcc80987e | 407 | __HAL_LOCK(hrng); |
mbed_official | 610:813dcc80987e | 408 | |
mbed_official | 610:813dcc80987e | 409 | /* Change RNG peripheral state */ |
mbed_official | 610:813dcc80987e | 410 | hrng->State = HAL_RNG_STATE_BUSY; |
mbed_official | 610:813dcc80987e | 411 | |
mbed_official | 610:813dcc80987e | 412 | /* Get a 32bit Random number */ |
mbed_official | 610:813dcc80987e | 413 | random32bit = hrng->Instance->DR; |
mbed_official | 610:813dcc80987e | 414 | |
mbed_official | 610:813dcc80987e | 415 | /* Enable the RNG Interrupts: Data Ready, Clock error, Seed error */ |
mbed_official | 610:813dcc80987e | 416 | __HAL_RNG_ENABLE_IT(hrng); |
mbed_official | 610:813dcc80987e | 417 | |
mbed_official | 610:813dcc80987e | 418 | /* Return the 32 bit random number */ |
mbed_official | 610:813dcc80987e | 419 | return random32bit; |
mbed_official | 610:813dcc80987e | 420 | } |
mbed_official | 610:813dcc80987e | 421 | |
mbed_official | 610:813dcc80987e | 422 | |
mbed_official | 610:813dcc80987e | 423 | |
mbed_official | 610:813dcc80987e | 424 | /** |
mbed_official | 610:813dcc80987e | 425 | * @brief Read latest generated random number. |
mbed_official | 610:813dcc80987e | 426 | * @param hrng: pointer to a RNG_HandleTypeDef structure. |
mbed_official | 610:813dcc80987e | 427 | * @retval random value |
mbed_official | 610:813dcc80987e | 428 | */ |
mbed_official | 610:813dcc80987e | 429 | uint32_t HAL_RNG_ReadLastRandomNumber(RNG_HandleTypeDef *hrng) |
mbed_official | 610:813dcc80987e | 430 | { |
mbed_official | 610:813dcc80987e | 431 | return(hrng->RandomNumber); |
mbed_official | 610:813dcc80987e | 432 | } |
mbed_official | 610:813dcc80987e | 433 | |
mbed_official | 610:813dcc80987e | 434 | /** |
mbed_official | 610:813dcc80987e | 435 | * @brief Data Ready callback in non-blocking mode. |
mbed_official | 610:813dcc80987e | 436 | * @param hrng: pointer to a RNG_HandleTypeDef structure. |
mbed_official | 610:813dcc80987e | 437 | * @param random32bit: generated random value |
mbed_official | 610:813dcc80987e | 438 | * @retval None |
mbed_official | 610:813dcc80987e | 439 | */ |
mbed_official | 610:813dcc80987e | 440 | __weak void HAL_RNG_ReadyDataCallback(RNG_HandleTypeDef *hrng, uint32_t random32bit) |
mbed_official | 610:813dcc80987e | 441 | { |
mbed_official | 610:813dcc80987e | 442 | /* NOTE : This function should not be modified. When the callback is needed, |
mbed_official | 610:813dcc80987e | 443 | function HAL_RNG_ReadyDataCallback must be implemented in the user file. |
mbed_official | 610:813dcc80987e | 444 | */ |
mbed_official | 610:813dcc80987e | 445 | } |
mbed_official | 610:813dcc80987e | 446 | |
mbed_official | 610:813dcc80987e | 447 | /** |
mbed_official | 610:813dcc80987e | 448 | * @brief RNG error callback. |
mbed_official | 610:813dcc80987e | 449 | * @param hrng: pointer to a RNG_HandleTypeDef structure. |
mbed_official | 610:813dcc80987e | 450 | * @retval None |
mbed_official | 610:813dcc80987e | 451 | */ |
mbed_official | 610:813dcc80987e | 452 | __weak void HAL_RNG_ErrorCallback(RNG_HandleTypeDef *hrng) |
mbed_official | 610:813dcc80987e | 453 | { |
mbed_official | 610:813dcc80987e | 454 | /* NOTE : This function should not be modified. When the callback is needed, |
mbed_official | 610:813dcc80987e | 455 | function HAL_RNG_ErrorCallback must be implemented in the user file. |
mbed_official | 610:813dcc80987e | 456 | */ |
mbed_official | 610:813dcc80987e | 457 | } |
mbed_official | 610:813dcc80987e | 458 | |
mbed_official | 610:813dcc80987e | 459 | /** |
mbed_official | 610:813dcc80987e | 460 | * @} |
mbed_official | 610:813dcc80987e | 461 | */ |
mbed_official | 610:813dcc80987e | 462 | |
mbed_official | 610:813dcc80987e | 463 | /** @addtogroup RNG_Exported_Functions_Group3 |
mbed_official | 610:813dcc80987e | 464 | * @brief Peripheral State functions. |
mbed_official | 610:813dcc80987e | 465 | * |
mbed_official | 610:813dcc80987e | 466 | @verbatim |
mbed_official | 610:813dcc80987e | 467 | =============================================================================== |
mbed_official | 610:813dcc80987e | 468 | ##### Peripheral State functions ##### |
mbed_official | 610:813dcc80987e | 469 | =============================================================================== |
mbed_official | 610:813dcc80987e | 470 | [..] |
mbed_official | 610:813dcc80987e | 471 | This subsection permits to get in run-time the status of the peripheral. |
mbed_official | 610:813dcc80987e | 472 | |
mbed_official | 610:813dcc80987e | 473 | @endverbatim |
mbed_official | 610:813dcc80987e | 474 | * @{ |
mbed_official | 610:813dcc80987e | 475 | */ |
mbed_official | 610:813dcc80987e | 476 | |
mbed_official | 610:813dcc80987e | 477 | /** |
mbed_official | 610:813dcc80987e | 478 | * @brief Return the RNG handle state. |
mbed_official | 610:813dcc80987e | 479 | * @param hrng: pointer to a RNG_HandleTypeDef structure. |
mbed_official | 610:813dcc80987e | 480 | * @retval HAL state |
mbed_official | 610:813dcc80987e | 481 | */ |
mbed_official | 610:813dcc80987e | 482 | HAL_RNG_StateTypeDef HAL_RNG_GetState(RNG_HandleTypeDef *hrng) |
mbed_official | 610:813dcc80987e | 483 | { |
mbed_official | 610:813dcc80987e | 484 | /* Return RNG handle state */ |
mbed_official | 610:813dcc80987e | 485 | return hrng->State; |
mbed_official | 610:813dcc80987e | 486 | } |
mbed_official | 610:813dcc80987e | 487 | |
mbed_official | 610:813dcc80987e | 488 | /** |
mbed_official | 610:813dcc80987e | 489 | * @} |
mbed_official | 610:813dcc80987e | 490 | */ |
mbed_official | 610:813dcc80987e | 491 | |
mbed_official | 610:813dcc80987e | 492 | /** |
mbed_official | 610:813dcc80987e | 493 | * @} |
mbed_official | 610:813dcc80987e | 494 | */ |
mbed_official | 610:813dcc80987e | 495 | |
mbed_official | 610:813dcc80987e | 496 | |
mbed_official | 610:813dcc80987e | 497 | #endif /* HAL_RNG_MODULE_ENABLED */ |
mbed_official | 610:813dcc80987e | 498 | /** |
mbed_official | 610:813dcc80987e | 499 | * @} |
mbed_official | 610:813dcc80987e | 500 | */ |
mbed_official | 610:813dcc80987e | 501 | |
mbed_official | 610:813dcc80987e | 502 | /** |
mbed_official | 610:813dcc80987e | 503 | * @} |
mbed_official | 610:813dcc80987e | 504 | */ |
mbed_official | 610:813dcc80987e | 505 | |
mbed_official | 610:813dcc80987e | 506 | /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |