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targets/cmsis/TARGET_STM/TARGET_NUCLEO_F334R8/stm32f3xx_hal_iwdg.c@237:f3da66175598, 2014-06-24 (annotated)

Committer:
mbed_official
Date:
Tue Jun 24 14:45:08 2014 +0100
Revision:
237:f3da66175598
Child:
375:3d36234a1087
Synchronized with git revision 8ef659bca81f12dfc896b5a7af7c2abbd1a1b8b7



Full URL: https://github.com/mbedmicro/mbed/commit/8ef659bca81f12dfc896b5a7af7c2abbd1a1b8b7/



[NUCLEO_F334R8] Add platform files

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UserRevisionLine numberNew contents of line
mbed_official 237:f3da66175598 1 /**
mbed_official 237:f3da66175598 2 ******************************************************************************
mbed_official 237:f3da66175598 3 * @file stm32f3xx_hal_iwdg.c
mbed_official 237:f3da66175598 4 * @author MCD Application Team
mbed_official 237:f3da66175598 5 * @version V1.0.1
mbed_official 237:f3da66175598 6 * @date 18-June-2014
mbed_official 237:f3da66175598 7 * @brief IWDG HAL module driver.
mbed_official 237:f3da66175598 8 *
mbed_official 237:f3da66175598 9 * This file provides firmware functions to manage the following
mbed_official 237:f3da66175598 10 * functionalities of the Independent Watchdog (IWDG) peripheral:
mbed_official 237:f3da66175598 11 * + Initialization and Configuration functions
mbed_official 237:f3da66175598 12 * + IO operation functions
mbed_official 237:f3da66175598 13 * + Peripheral State functions
mbed_official 237:f3da66175598 14 *
mbed_official 237:f3da66175598 15 @verbatim
mbed_official 237:f3da66175598 16
mbed_official 237:f3da66175598 17 ================================================================================
mbed_official 237:f3da66175598 18 ##### IWDG specific features #####
mbed_official 237:f3da66175598 19 ================================================================================
mbed_official 237:f3da66175598 20 [..]
mbed_official 237:f3da66175598 21 (+) The IWDG can be started by either software or hardware (configurable
mbed_official 237:f3da66175598 22 through option byte).
mbed_official 237:f3da66175598 23
mbed_official 237:f3da66175598 24 (+) The IWDG is clocked by its own dedicated Low-Speed clock (LSI) and
mbed_official 237:f3da66175598 25 thus stays active even if the main clock fails.
mbed_official 237:f3da66175598 26
mbed_official 237:f3da66175598 27 (+) Once the IWDG is started, the LSI is forced ON and cannot be disabled
mbed_official 237:f3da66175598 28 (LSI cannot be disabled too), and the counter starts counting down from
mbed_official 237:f3da66175598 29 the reset value of 0xFFF. When it reaches the end of count value (0x000)
mbed_official 237:f3da66175598 30 a system reset is generated.
mbed_official 237:f3da66175598 31
mbed_official 237:f3da66175598 32 (+) The IWDG counter should be refreshed at regular intervals, otherwise the
mbed_official 237:f3da66175598 33 watchdog generates an MCU reset when the counter reaches 0.
mbed_official 237:f3da66175598 34
mbed_official 237:f3da66175598 35 (+) The IWDG is implemented in the VDD voltage domain that is still functional
mbed_official 237:f3da66175598 36 in STOP and STANDBY mode (IWDG reset can wake-up from STANDBY).
mbed_official 237:f3da66175598 37
mbed_official 237:f3da66175598 38 (+) IWDGRST flag in RCC_CSR register can be used to inform when an IWDG
mbed_official 237:f3da66175598 39 reset occurs.
mbed_official 237:f3da66175598 40
mbed_official 237:f3da66175598 41 (+) Min-max timeout value @41KHz (LSI): ~0.1ms / ~25.5s
mbed_official 237:f3da66175598 42 The IWDG timeout may vary due to LSI frequency dispersion. STM32F30x
mbed_official 237:f3da66175598 43 devices provide the capability to measure the LSI frequency (LSI clock
mbed_official 237:f3da66175598 44 connected internally to TIM16 CH1 input capture). The measured value
mbed_official 237:f3da66175598 45 can be used to have an IWDG timeout with an acceptable accuracy.
mbed_official 237:f3da66175598 46 For more information, please refer to the STM32F3xx Reference manual.
mbed_official 237:f3da66175598 47
mbed_official 237:f3da66175598 48 ##### How to use this driver #####
mbed_official 237:f3da66175598 49 ==============================================================================
mbed_official 237:f3da66175598 50 [..]
mbed_official 237:f3da66175598 51 (#) if Window option is disabled
mbed_official 237:f3da66175598 52 (+) Use IWDG using HAL_IWDG_Init() function to :
mbed_official 237:f3da66175598 53 (++) Enable write access to IWDG_PR, IWDG_RLR.
mbed_official 237:f3da66175598 54 (++) Configure the IWDG prescaler, counter reload value.
mbed_official 237:f3da66175598 55 This reload value will be loaded in the IWDG counter each time the counter
mbed_official 237:f3da66175598 56 is reloaded, then the IWDG will start counting down from this value.
mbed_official 237:f3da66175598 57 (+) Use IWDG using HAL_IWDG_Start() function to :
mbed_official 237:f3da66175598 58 (++) Reload IWDG counter with value defined in the IWDG_RLR register.
mbed_official 237:f3da66175598 59 (++) Start the IWDG, when the IWDG is used in software mode (no need
mbed_official 237:f3da66175598 60 to enable the LSI, it will be enabled by hardware).
mbed_official 237:f3da66175598 61 (+) Then the application program must refresh the IWDG counter at regular
mbed_official 237:f3da66175598 62 intervals during normal operation to prevent an MCU reset, using
mbed_official 237:f3da66175598 63 HAL_IWDG_Refresh() function.
mbed_official 237:f3da66175598 64 (#) if Window option is enabled:
mbed_official 237:f3da66175598 65 (+) Use IWDG using HAL_IWDG_Start() function to enable IWDG downcounter
mbed_official 237:f3da66175598 66 (+) Use IWDG using HAL_IWDG_Init() function to :
mbed_official 237:f3da66175598 67 (++) Enable write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers.
mbed_official 237:f3da66175598 68 (++) Configure the IWDG prescaler, reload value and window value.
mbed_official 237:f3da66175598 69 (+) Then the application program must refresh the IWDG counter at regular
mbed_official 237:f3da66175598 70 intervals during normal operation to prevent an MCU reset, using
mbed_official 237:f3da66175598 71 HAL_IWDG_Refresh() function.
mbed_official 237:f3da66175598 72
mbed_official 237:f3da66175598 73 *** IWDG HAL driver macros list ***
mbed_official 237:f3da66175598 74 ====================================
mbed_official 237:f3da66175598 75 [..]
mbed_official 237:f3da66175598 76 Below the list of most used macros in IWDG HAL driver.
mbed_official 237:f3da66175598 77
mbed_official 237:f3da66175598 78 (+) __HAL_IWDG_START: Enable the IWDG peripheral
mbed_official 237:f3da66175598 79 (+) __HAL_IWDG_RELOAD_COUNTER: Reloads IWDG counter with value defined in the reload register
mbed_official 237:f3da66175598 80 (+) __HAL_IWDG_ENABLE_WRITE_ACCESS : Enable write access to IWDG_PR and IWDG_RLR registers
mbed_official 237:f3da66175598 81 (+) __HAL_IWDG_DISABLE_WRITE_ACCESS : Disable write access to IWDG_PR and IWDG_RLR registers
mbed_official 237:f3da66175598 82 (+) __HAL_IWDG_GET_FLAG: Get the selected IWDG's flag status
mbed_official 237:f3da66175598 83
mbed_official 237:f3da66175598 84 @endverbatim
mbed_official 237:f3da66175598 85 ******************************************************************************
mbed_official 237:f3da66175598 86 * @attention
mbed_official 237:f3da66175598 87 *
mbed_official 237:f3da66175598 88 * <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
mbed_official 237:f3da66175598 89 *
mbed_official 237:f3da66175598 90 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 237:f3da66175598 91 * are permitted provided that the following conditions are met:
mbed_official 237:f3da66175598 92 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 237:f3da66175598 93 * this list of conditions and the following disclaimer.
mbed_official 237:f3da66175598 94 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 237:f3da66175598 95 * this list of conditions and the following disclaimer in the documentation
mbed_official 237:f3da66175598 96 * and/or other materials provided with the distribution.
mbed_official 237:f3da66175598 97 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 237:f3da66175598 98 * may be used to endorse or promote products derived from this software
mbed_official 237:f3da66175598 99 * without specific prior written permission.
mbed_official 237:f3da66175598 100 *
mbed_official 237:f3da66175598 101 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 237:f3da66175598 102 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 237:f3da66175598 103 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 237:f3da66175598 104 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 237:f3da66175598 105 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 237:f3da66175598 106 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 237:f3da66175598 107 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 237:f3da66175598 108 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 237:f3da66175598 109 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 237:f3da66175598 110 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 237:f3da66175598 111 *
mbed_official 237:f3da66175598 112 ******************************************************************************
mbed_official 237:f3da66175598 113 */
mbed_official 237:f3da66175598 114
mbed_official 237:f3da66175598 115 /* Includes ------------------------------------------------------------------*/
mbed_official 237:f3da66175598 116 #include "stm32f3xx_hal.h"
mbed_official 237:f3da66175598 117
mbed_official 237:f3da66175598 118 /** @addtogroup STM32F3xx_HAL_Driver
mbed_official 237:f3da66175598 119 * @{
mbed_official 237:f3da66175598 120 */
mbed_official 237:f3da66175598 121
mbed_official 237:f3da66175598 122 /** @defgroup IWDG
mbed_official 237:f3da66175598 123 * @brief IWDG HAL module driver.
mbed_official 237:f3da66175598 124 * @{
mbed_official 237:f3da66175598 125 */
mbed_official 237:f3da66175598 126
mbed_official 237:f3da66175598 127 #ifdef HAL_IWDG_MODULE_ENABLED
mbed_official 237:f3da66175598 128
mbed_official 237:f3da66175598 129 /* Private typedef -----------------------------------------------------------*/
mbed_official 237:f3da66175598 130 /* Private define ------------------------------------------------------------*/
mbed_official 237:f3da66175598 131 #define HAL_IWDG_DEFAULT_TIMEOUT 1000
mbed_official 237:f3da66175598 132 /* Private macro -------------------------------------------------------------*/
mbed_official 237:f3da66175598 133 /* Private variables ---------------------------------------------------------*/
mbed_official 237:f3da66175598 134 /* Private function prototypes -----------------------------------------------*/
mbed_official 237:f3da66175598 135 /* Private functions ---------------------------------------------------------*/
mbed_official 237:f3da66175598 136
mbed_official 237:f3da66175598 137 /** @defgroup IWDG_Private_Functions
mbed_official 237:f3da66175598 138 * @{
mbed_official 237:f3da66175598 139 */
mbed_official 237:f3da66175598 140
mbed_official 237:f3da66175598 141 /** @defgroup IWDG_Group1 Initialization functions
mbed_official 237:f3da66175598 142 * @brief Initialization and Configuration functions.
mbed_official 237:f3da66175598 143 *
mbed_official 237:f3da66175598 144 @verbatim
mbed_official 237:f3da66175598 145 ===============================================================================
mbed_official 237:f3da66175598 146 ##### Initialization functions #####
mbed_official 237:f3da66175598 147 ===============================================================================
mbed_official 237:f3da66175598 148 [..] This section provides functions allowing to:
mbed_official 237:f3da66175598 149 (+) Initialize the IWDG according to the specified parameters
mbed_official 237:f3da66175598 150 in the IWDG_InitTypeDef and create the associated handle
mbed_official 237:f3da66175598 151 (+) Manage Window option
mbed_official 237:f3da66175598 152 (+) Initialize the IWDG MSP
mbed_official 237:f3da66175598 153
mbed_official 237:f3da66175598 154 @endverbatim
mbed_official 237:f3da66175598 155 * @{
mbed_official 237:f3da66175598 156 */
mbed_official 237:f3da66175598 157
mbed_official 237:f3da66175598 158 /**
mbed_official 237:f3da66175598 159 * @brief Initializes the IWDG according to the specified
mbed_official 237:f3da66175598 160 * parameters in the IWDG_InitTypeDef and creates the associated handle.
mbed_official 237:f3da66175598 161 * @param hiwdg: IWDG handle
mbed_official 237:f3da66175598 162 * @retval HAL status
mbed_official 237:f3da66175598 163 */
mbed_official 237:f3da66175598 164 HAL_StatusTypeDef HAL_IWDG_Init(IWDG_HandleTypeDef *hiwdg)
mbed_official 237:f3da66175598 165 {
mbed_official 237:f3da66175598 166 uint32_t tickstart = 0;
mbed_official 237:f3da66175598 167
mbed_official 237:f3da66175598 168 /* Check the IWDG handle allocation */
mbed_official 237:f3da66175598 169 if(hiwdg == NULL)
mbed_official 237:f3da66175598 170 {
mbed_official 237:f3da66175598 171 return HAL_ERROR;
mbed_official 237:f3da66175598 172 }
mbed_official 237:f3da66175598 173
mbed_official 237:f3da66175598 174 /* Check the parameters */
mbed_official 237:f3da66175598 175 assert_param(IS_IWDG_ALL_INSTANCE(hiwdg->Instance));
mbed_official 237:f3da66175598 176 assert_param(IS_IWDG_PRESCALER(hiwdg->Init.Prescaler));
mbed_official 237:f3da66175598 177 assert_param(IS_IWDG_RELOAD(hiwdg->Init.Reload));
mbed_official 237:f3da66175598 178 assert_param(IS_IWDG_WINDOW(hiwdg->Init.Window));
mbed_official 237:f3da66175598 179
mbed_official 237:f3da66175598 180 /* Check pending flag, if previous update not done, return error */
mbed_official 237:f3da66175598 181 if((__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_PVU) != RESET) &&
mbed_official 237:f3da66175598 182 (__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_RVU) != RESET) &&
mbed_official 237:f3da66175598 183 (__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_WVU) != RESET))
mbed_official 237:f3da66175598 184 {
mbed_official 237:f3da66175598 185 return HAL_ERROR;
mbed_official 237:f3da66175598 186 }
mbed_official 237:f3da66175598 187
mbed_official 237:f3da66175598 188 if(hiwdg->State == HAL_IWDG_STATE_RESET)
mbed_official 237:f3da66175598 189 {
mbed_official 237:f3da66175598 190 /* Init the low level hardware */
mbed_official 237:f3da66175598 191 HAL_IWDG_MspInit(hiwdg);
mbed_official 237:f3da66175598 192 }
mbed_official 237:f3da66175598 193
mbed_official 237:f3da66175598 194 /* Change IWDG peripheral state */
mbed_official 237:f3da66175598 195 hiwdg->State = HAL_IWDG_STATE_BUSY;
mbed_official 237:f3da66175598 196
mbed_official 237:f3da66175598 197 /* Enable write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers */
mbed_official 237:f3da66175598 198 /* by writing 0x5555 in KR */
mbed_official 237:f3da66175598 199 __HAL_IWDG_ENABLE_WRITE_ACCESS(hiwdg);
mbed_official 237:f3da66175598 200
mbed_official 237:f3da66175598 201 /* Write to IWDG registers the IWDG_Prescaler & IWDG_Reload values to work with */
mbed_official 237:f3da66175598 202 MODIFY_REG(hiwdg->Instance->PR, IWDG_PR_PR, hiwdg->Init.Prescaler);
mbed_official 237:f3da66175598 203 MODIFY_REG(hiwdg->Instance->RLR, IWDG_RLR_RL, hiwdg->Init.Reload);
mbed_official 237:f3da66175598 204
mbed_official 237:f3da66175598 205 /* check if window option is enabled */
mbed_official 237:f3da66175598 206 if (((hiwdg->Init.Window) != IWDG_WINDOW_DISABLE) || ((hiwdg->Instance->WINR) != IWDG_WINDOW_DISABLE))
mbed_official 237:f3da66175598 207 {
mbed_official 237:f3da66175598 208 tickstart = HAL_GetTick();
mbed_official 237:f3da66175598 209
mbed_official 237:f3da66175598 210 /* Wait for register to be updated */
mbed_official 237:f3da66175598 211 while((uint32_t)(hiwdg->Instance->SR) != RESET)
mbed_official 237:f3da66175598 212 {
mbed_official 237:f3da66175598 213 if((HAL_GetTick()-tickstart) > HAL_IWDG_DEFAULT_TIMEOUT)
mbed_official 237:f3da66175598 214 {
mbed_official 237:f3da66175598 215 /* Set IWDG state */
mbed_official 237:f3da66175598 216 hiwdg->State = HAL_IWDG_STATE_TIMEOUT;
mbed_official 237:f3da66175598 217 return HAL_TIMEOUT;
mbed_official 237:f3da66175598 218 }
mbed_official 237:f3da66175598 219 }
mbed_official 237:f3da66175598 220
mbed_official 237:f3da66175598 221 /* Write to IWDG WINR the IWDG_Window value to compare with */
mbed_official 237:f3da66175598 222 MODIFY_REG(hiwdg->Instance->WINR, IWDG_WINR_WIN, hiwdg->Init.Window);
mbed_official 237:f3da66175598 223
mbed_official 237:f3da66175598 224 }
mbed_official 237:f3da66175598 225 /* Change IWDG peripheral state */
mbed_official 237:f3da66175598 226 hiwdg->State = HAL_IWDG_STATE_READY;
mbed_official 237:f3da66175598 227
mbed_official 237:f3da66175598 228 /* Return function status */
mbed_official 237:f3da66175598 229 return HAL_OK;
mbed_official 237:f3da66175598 230 }
mbed_official 237:f3da66175598 231
mbed_official 237:f3da66175598 232 /**
mbed_official 237:f3da66175598 233 * @brief Initializes the IWDG MSP.
mbed_official 237:f3da66175598 234 * @param hiwdg: IWDG handle
mbed_official 237:f3da66175598 235 * @retval None
mbed_official 237:f3da66175598 236 */
mbed_official 237:f3da66175598 237 __weak void HAL_IWDG_MspInit(IWDG_HandleTypeDef *hiwdg)
mbed_official 237:f3da66175598 238 {
mbed_official 237:f3da66175598 239 /* NOTE : This function Should not be modified, when the callback is needed,
mbed_official 237:f3da66175598 240 the HAL_IWDG_MspInit could be implemented in the user file
mbed_official 237:f3da66175598 241 */
mbed_official 237:f3da66175598 242 }
mbed_official 237:f3da66175598 243
mbed_official 237:f3da66175598 244 /**
mbed_official 237:f3da66175598 245 * @}
mbed_official 237:f3da66175598 246 */
mbed_official 237:f3da66175598 247
mbed_official 237:f3da66175598 248 /** @defgroup IWDG_Group2 IO operation functions
mbed_official 237:f3da66175598 249 * @brief IO operation functions
mbed_official 237:f3da66175598 250 *
mbed_official 237:f3da66175598 251 @verbatim
mbed_official 237:f3da66175598 252 ===============================================================================
mbed_official 237:f3da66175598 253 ##### IO operation functions #####
mbed_official 237:f3da66175598 254 ===============================================================================
mbed_official 237:f3da66175598 255 [..] This section provides functions allowing to:
mbed_official 237:f3da66175598 256 (+) Start the IWDG.
mbed_official 237:f3da66175598 257 (+) Refresh the IWDG.
mbed_official 237:f3da66175598 258
mbed_official 237:f3da66175598 259 @endverbatim
mbed_official 237:f3da66175598 260 * @{
mbed_official 237:f3da66175598 261 */
mbed_official 237:f3da66175598 262
mbed_official 237:f3da66175598 263 /**
mbed_official 237:f3da66175598 264 * @brief Starts the IWDG.
mbed_official 237:f3da66175598 265 * @param hiwdg: IWDG handle
mbed_official 237:f3da66175598 266 * @retval HAL status
mbed_official 237:f3da66175598 267 */
mbed_official 237:f3da66175598 268 HAL_StatusTypeDef HAL_IWDG_Start(IWDG_HandleTypeDef *hiwdg)
mbed_official 237:f3da66175598 269 {
mbed_official 237:f3da66175598 270 uint32_t tickstart = 0;
mbed_official 237:f3da66175598 271
mbed_official 237:f3da66175598 272 /* Process Locked */
mbed_official 237:f3da66175598 273 __HAL_LOCK(hiwdg);
mbed_official 237:f3da66175598 274
mbed_official 237:f3da66175598 275 /* Change IWDG peripheral state */
mbed_official 237:f3da66175598 276 hiwdg->State = HAL_IWDG_STATE_BUSY;
mbed_official 237:f3da66175598 277
mbed_official 237:f3da66175598 278 /* Reload IWDG counter with value defined in the RLR register */
mbed_official 237:f3da66175598 279 if ((hiwdg->Init.Window) == IWDG_WINDOW_DISABLE)
mbed_official 237:f3da66175598 280 {
mbed_official 237:f3da66175598 281 __HAL_IWDG_RELOAD_COUNTER(hiwdg);
mbed_official 237:f3da66175598 282 }
mbed_official 237:f3da66175598 283
mbed_official 237:f3da66175598 284 /* Enable the IWDG peripheral */
mbed_official 237:f3da66175598 285 __HAL_IWDG_START(hiwdg);
mbed_official 237:f3da66175598 286
mbed_official 237:f3da66175598 287 tickstart = HAL_GetTick();
mbed_official 237:f3da66175598 288
mbed_official 237:f3da66175598 289 /* Wait until PVU, RVU, WVU flag are RESET */
mbed_official 237:f3da66175598 290 while( (__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_PVU) != RESET) &&
mbed_official 237:f3da66175598 291 (__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_RVU) != RESET) &&
mbed_official 237:f3da66175598 292 (__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_WVU) != RESET) )
mbed_official 237:f3da66175598 293 {
mbed_official 237:f3da66175598 294 if((HAL_GetTick()-tickstart) > HAL_IWDG_DEFAULT_TIMEOUT)
mbed_official 237:f3da66175598 295 {
mbed_official 237:f3da66175598 296 /* Set IWDG state */
mbed_official 237:f3da66175598 297 hiwdg->State = HAL_IWDG_STATE_TIMEOUT;
mbed_official 237:f3da66175598 298
mbed_official 237:f3da66175598 299 /* Process unlocked */
mbed_official 237:f3da66175598 300 __HAL_UNLOCK(hiwdg);
mbed_official 237:f3da66175598 301
mbed_official 237:f3da66175598 302 return HAL_TIMEOUT;
mbed_official 237:f3da66175598 303 }
mbed_official 237:f3da66175598 304 }
mbed_official 237:f3da66175598 305
mbed_official 237:f3da66175598 306 /* Change IWDG peripheral state */
mbed_official 237:f3da66175598 307 hiwdg->State = HAL_IWDG_STATE_READY;
mbed_official 237:f3da66175598 308
mbed_official 237:f3da66175598 309 /* Process Unlocked */
mbed_official 237:f3da66175598 310 __HAL_UNLOCK(hiwdg);
mbed_official 237:f3da66175598 311
mbed_official 237:f3da66175598 312 /* Return function status */
mbed_official 237:f3da66175598 313 return HAL_OK;
mbed_official 237:f3da66175598 314 }
mbed_official 237:f3da66175598 315
mbed_official 237:f3da66175598 316 /**
mbed_official 237:f3da66175598 317 * @brief Refreshes the IWDG.
mbed_official 237:f3da66175598 318 * @param hiwdg: IWDG handle
mbed_official 237:f3da66175598 319 * @retval HAL status
mbed_official 237:f3da66175598 320 */
mbed_official 237:f3da66175598 321 HAL_StatusTypeDef HAL_IWDG_Refresh(IWDG_HandleTypeDef *hiwdg)
mbed_official 237:f3da66175598 322 {
mbed_official 237:f3da66175598 323 uint32_t tickstart = 0;
mbed_official 237:f3da66175598 324
mbed_official 237:f3da66175598 325 /* Process Locked */
mbed_official 237:f3da66175598 326 __HAL_LOCK(hiwdg);
mbed_official 237:f3da66175598 327
mbed_official 237:f3da66175598 328 /* Change IWDG peripheral state */
mbed_official 237:f3da66175598 329 hiwdg->State = HAL_IWDG_STATE_BUSY;
mbed_official 237:f3da66175598 330
mbed_official 237:f3da66175598 331 tickstart = HAL_GetTick();
mbed_official 237:f3da66175598 332
mbed_official 237:f3da66175598 333 /* Wait until RVU flag is RESET */
mbed_official 237:f3da66175598 334 while(__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_RVU) != RESET)
mbed_official 237:f3da66175598 335 {
mbed_official 237:f3da66175598 336 if((HAL_GetTick()-tickstart) > HAL_IWDG_DEFAULT_TIMEOUT)
mbed_official 237:f3da66175598 337 {
mbed_official 237:f3da66175598 338 /* Set IWDG state */
mbed_official 237:f3da66175598 339 hiwdg->State = HAL_IWDG_STATE_TIMEOUT;
mbed_official 237:f3da66175598 340
mbed_official 237:f3da66175598 341 /* Process unlocked */
mbed_official 237:f3da66175598 342 __HAL_UNLOCK(hiwdg);
mbed_official 237:f3da66175598 343
mbed_official 237:f3da66175598 344 return HAL_TIMEOUT;
mbed_official 237:f3da66175598 345 }
mbed_official 237:f3da66175598 346 }
mbed_official 237:f3da66175598 347
mbed_official 237:f3da66175598 348 /* Reload IWDG counter with value defined in the reload register */
mbed_official 237:f3da66175598 349 __HAL_IWDG_RELOAD_COUNTER(hiwdg);
mbed_official 237:f3da66175598 350
mbed_official 237:f3da66175598 351 /* Change IWDG peripheral state */
mbed_official 237:f3da66175598 352 hiwdg->State = HAL_IWDG_STATE_READY;
mbed_official 237:f3da66175598 353
mbed_official 237:f3da66175598 354 /* Process Unlocked */
mbed_official 237:f3da66175598 355 __HAL_UNLOCK(hiwdg);
mbed_official 237:f3da66175598 356
mbed_official 237:f3da66175598 357 /* Return function status */
mbed_official 237:f3da66175598 358 return HAL_OK;
mbed_official 237:f3da66175598 359 }
mbed_official 237:f3da66175598 360
mbed_official 237:f3da66175598 361 /**
mbed_official 237:f3da66175598 362 * @}
mbed_official 237:f3da66175598 363 */
mbed_official 237:f3da66175598 364
mbed_official 237:f3da66175598 365 /** @defgroup IWDG_Group3 Peripheral State functions
mbed_official 237:f3da66175598 366 * @brief Peripheral State functions.
mbed_official 237:f3da66175598 367 *
mbed_official 237:f3da66175598 368 @verbatim
mbed_official 237:f3da66175598 369 ===============================================================================
mbed_official 237:f3da66175598 370 ##### Peripheral State functions #####
mbed_official 237:f3da66175598 371 ===============================================================================
mbed_official 237:f3da66175598 372 [..]
mbed_official 237:f3da66175598 373 This subsection permits to get in run-time the status of the peripheral
mbed_official 237:f3da66175598 374 and the data flow.
mbed_official 237:f3da66175598 375
mbed_official 237:f3da66175598 376 @endverbatim
mbed_official 237:f3da66175598 377 * @{
mbed_official 237:f3da66175598 378 */
mbed_official 237:f3da66175598 379
mbed_official 237:f3da66175598 380 /**
mbed_official 237:f3da66175598 381 * @brief Returns the IWDG state.
mbed_official 237:f3da66175598 382 * @param hiwdg: IWDG handle
mbed_official 237:f3da66175598 383 * @retval HAL state
mbed_official 237:f3da66175598 384 */
mbed_official 237:f3da66175598 385 HAL_IWDG_StateTypeDef HAL_IWDG_GetState(IWDG_HandleTypeDef *hiwdg)
mbed_official 237:f3da66175598 386 {
mbed_official 237:f3da66175598 387 return hiwdg->State;
mbed_official 237:f3da66175598 388 }
mbed_official 237:f3da66175598 389
mbed_official 237:f3da66175598 390 /**
mbed_official 237:f3da66175598 391 * @}
mbed_official 237:f3da66175598 392 */
mbed_official 237:f3da66175598 393
mbed_official 237:f3da66175598 394 /**
mbed_official 237:f3da66175598 395 * @}
mbed_official 237:f3da66175598 396 */
mbed_official 237:f3da66175598 397
mbed_official 237:f3da66175598 398 #endif /* HAL_IWDG_MODULE_ENABLED */
mbed_official 237:f3da66175598 399 /**
mbed_official 237:f3da66175598 400 * @}
mbed_official 237:f3da66175598 401 */
mbed_official 237:f3da66175598 402
mbed_official 237:f3da66175598 403 /**
mbed_official 237:f3da66175598 404 * @}
mbed_official 237:f3da66175598 405 */
mbed_official 237:f3da66175598 406
mbed_official 237:f3da66175598 407 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/