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Mbed for VNG board

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targets/cmsis/TARGET_STM/TARGET_STM32L0/stm32l0xx_hal_iwdg.c@387:643a59b3dbac, 2014-11-05 (annotated)

Committer:
mbed_official
Date:
Wed Nov 05 14:30:08 2014 +0000
Revision:
387:643a59b3dbac
Parent:
382:ee426a420dbb 
Synchronized with git revision cfeccf154f8f92c3ea9c0c881c577c154537aecc



Full URL: https://github.com/mbedmicro/mbed/commit/cfeccf154f8f92c3ea9c0c881c577c154537aecc/



Exporters: STM32L053R8 - IAR exporter

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 376:cb4d9db17537 1 /**
mbed_official 376:cb4d9db17537 2 ******************************************************************************
mbed_official 376:cb4d9db17537 3 * @file stm32l0xx_hal_iwdg.c
mbed_official 376:cb4d9db17537 4 * @author MCD Application Team
mbed_official 376:cb4d9db17537 5 * @version V1.1.0
mbed_official 376:cb4d9db17537 6 * @date 18-June-2014
mbed_official 376:cb4d9db17537 7 * @brief IWDG HAL module driver.
mbed_official 376:cb4d9db17537 8 * This file provides firmware functions to manage the following
mbed_official 376:cb4d9db17537 9 * functionalities of the Independent Watchdog (IWDG) peripheral:
mbed_official 376:cb4d9db17537 10 * + Initialization and de-initialization functions
mbed_official 376:cb4d9db17537 11 * + IO operation functions
mbed_official 376:cb4d9db17537 12 * + Peripheral State functions
mbed_official 376:cb4d9db17537 13 *
mbed_official 376:cb4d9db17537 14 @verbatim
mbed_official 376:cb4d9db17537 15 ==============================================================================
mbed_official 376:cb4d9db17537 16 ##### IWDG Generic features #####
mbed_official 376:cb4d9db17537 17 ==============================================================================
mbed_official 376:cb4d9db17537 18 [..]
mbed_official 376:cb4d9db17537 19 (+) The IWDG can be started by either software or hardware (configurable
mbed_official 376:cb4d9db17537 20 through option byte).
mbed_official 376:cb4d9db17537 21
mbed_official 376:cb4d9db17537 22 (+) The IWDG is clocked by its own dedicated Low-Speed clock (LSI) and
mbed_official 376:cb4d9db17537 23 thus stays active even if the main clock fails.
mbed_official 376:cb4d9db17537 24 Once the IWDG is started, the LSI is forced ON and cannot be disabled
mbed_official 376:cb4d9db17537 25 (LSI cannot be disabled too), and the counter starts counting down from
mbed_official 376:cb4d9db17537 26 the reset value of 0xFFF. When it reaches the end of count value (0x000)
mbed_official 376:cb4d9db17537 27 a system reset is generated.
mbed_official 376:cb4d9db17537 28
mbed_official 376:cb4d9db17537 29 (+) The IWDG counter should be refreshed at regular intervals, otherwise the
mbed_official 376:cb4d9db17537 30 watchdog generates an MCU reset when the counter reaches 0.
mbed_official 376:cb4d9db17537 31
mbed_official 376:cb4d9db17537 32 (+) The IWDG is implemented in the VDD voltage domain that is still functional
mbed_official 376:cb4d9db17537 33 in STOP and STANDBY mode (IWDG reset can wake-up from STANDBY).
mbed_official 376:cb4d9db17537 34 IWDGRST flag in RCC_CSR register can be used to inform when an IWDG
mbed_official 376:cb4d9db17537 35 reset occurs.
mbed_official 376:cb4d9db17537 36
mbed_official 376:cb4d9db17537 37 [..] Min-max timeout value @32KHz (LSI): ~0.512ms / ~32.0s
mbed_official 376:cb4d9db17537 38 The IWDG timeout may vary due to LSI frequency dispersion. STM32L0xx
mbed_official 376:cb4d9db17537 39 devices provide the capability to measure the LSI frequency (LSI clock
mbed_official 376:cb4d9db17537 40 connected internally to TIM5 CH4 input capture). The measured value
mbed_official 376:cb4d9db17537 41 can be used to have an IWDG timeout with an acceptable accuracy.
mbed_official 376:cb4d9db17537 42
mbed_official 376:cb4d9db17537 43
mbed_official 376:cb4d9db17537 44 ##### How to use this driver #####
mbed_official 376:cb4d9db17537 45 ==============================================================================
mbed_official 376:cb4d9db17537 46 [..]
mbed_official 376:cb4d9db17537 47 If Window option is disabled
mbed_official 376:cb4d9db17537 48
mbed_official 376:cb4d9db17537 49 (+) Use IWDG using HAL_IWDG_Init() function to :
mbed_official 376:cb4d9db17537 50 (++) Enable write access to IWDG_PR, IWDG_RLR.
mbed_official 376:cb4d9db17537 51 (++) Configure the IWDG prescaler, counter reload value.
mbed_official 376:cb4d9db17537 52 This reload value will be loaded in the IWDG counter each time the counter
mbed_official 376:cb4d9db17537 53 is reloaded, then the IWDG will start counting down from this value.
mbed_official 376:cb4d9db17537 54 (+) Use IWDG using HAL_IWDG_Start() function to :
mbed_official 376:cb4d9db17537 55 (++) Reload IWDG counter with value defined in the IWDG_RLR register.
mbed_official 376:cb4d9db17537 56 (++) Start the IWDG, when the IWDG is used in software mode (no need
mbed_official 376:cb4d9db17537 57 to enable the LSI, it will be enabled by hardware).
mbed_official 376:cb4d9db17537 58 (+) Then the application program must refresh the IWDG counter at regular
mbed_official 376:cb4d9db17537 59 intervals during normal operation to prevent an MCU reset, using
mbed_official 376:cb4d9db17537 60 HAL_IWDG_Refresh() function.
mbed_official 376:cb4d9db17537 61 [..]
mbed_official 376:cb4d9db17537 62 if Window option is enabled:
mbed_official 376:cb4d9db17537 63
mbed_official 376:cb4d9db17537 64 (+) Use IWDG using HAL_IWDG_Start() function to enable IWDG downcounter
mbed_official 376:cb4d9db17537 65 (+) Use IWDG using HAL_IWDG_Init() function to :
mbed_official 376:cb4d9db17537 66 (++) Enable write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers.
mbed_official 376:cb4d9db17537 67 (++) Configure the IWDG prescaler, reload value and window value.
mbed_official 376:cb4d9db17537 68 (+) Then the application program must refresh the IWDG counter at regular
mbed_official 376:cb4d9db17537 69 intervals during normal operation to prevent an MCU reset, using
mbed_official 376:cb4d9db17537 70 HAL_IWDG_Refresh() function.
mbed_official 376:cb4d9db17537 71
mbed_official 376:cb4d9db17537 72 *** IWDG HAL driver macros list ***
mbed_official 376:cb4d9db17537 73 ====================================
mbed_official 376:cb4d9db17537 74 [..]
mbed_official 376:cb4d9db17537 75 Below the list of most used macros in IWDG HAL driver.
mbed_official 376:cb4d9db17537 76
mbed_official 376:cb4d9db17537 77 (+) __HAL_IWDG_START: Enable the IWDG peripheral
mbed_official 376:cb4d9db17537 78 (+) __HAL_IWDG_RELOAD_COUNTER: Reloads IWDG counter with value defined in the reload register
mbed_official 376:cb4d9db17537 79 (+) __HAL_IWDG_ENABLE_WRITE_ACCESS : Enable write access to IWDG_PR and IWDG_RLR registers
mbed_official 376:cb4d9db17537 80 (+) __HAL_IWDG_DISABLE_WRITE_ACCESS : Disable write access to IWDG_PR and IWDG_RLR registers
mbed_official 376:cb4d9db17537 81 (+) __HAL_IWDG_GET_FLAG: Get the selected IWDG's flag status
mbed_official 376:cb4d9db17537 82
mbed_official 376:cb4d9db17537 83 @endverbatim
mbed_official 376:cb4d9db17537 84 ******************************************************************************
mbed_official 376:cb4d9db17537 85 * @attention
mbed_official 376:cb4d9db17537 86 *
mbed_official 376:cb4d9db17537 87 * <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
mbed_official 376:cb4d9db17537 88 *
mbed_official 376:cb4d9db17537 89 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 376:cb4d9db17537 90 * are permitted provided that the following conditions are met:
mbed_official 376:cb4d9db17537 91 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 376:cb4d9db17537 92 * this list of conditions and the following disclaimer.
mbed_official 376:cb4d9db17537 93 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 376:cb4d9db17537 94 * this list of conditions and the following disclaimer in the documentation
mbed_official 376:cb4d9db17537 95 * and/or other materials provided with the distribution.
mbed_official 376:cb4d9db17537 96 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 376:cb4d9db17537 97 * may be used to endorse or promote products derived from this software
mbed_official 376:cb4d9db17537 98 * without specific prior written permission.
mbed_official 376:cb4d9db17537 99 *
mbed_official 376:cb4d9db17537 100 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 376:cb4d9db17537 101 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 376:cb4d9db17537 102 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 376:cb4d9db17537 103 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 376:cb4d9db17537 104 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 376:cb4d9db17537 105 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 376:cb4d9db17537 106 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 376:cb4d9db17537 107 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 376:cb4d9db17537 108 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 376:cb4d9db17537 109 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 376:cb4d9db17537 110 *
mbed_official 376:cb4d9db17537 111 ******************************************************************************
mbed_official 376:cb4d9db17537 112 */
mbed_official 376:cb4d9db17537 113
mbed_official 376:cb4d9db17537 114 /* Includes ------------------------------------------------------------------*/
mbed_official 376:cb4d9db17537 115 #include "stm32l0xx_hal.h"
mbed_official 376:cb4d9db17537 116
mbed_official 376:cb4d9db17537 117 /** @addtogroup STM32L0xx_HAL_Driver
mbed_official 376:cb4d9db17537 118 * @{
mbed_official 376:cb4d9db17537 119 */
mbed_official 376:cb4d9db17537 120
mbed_official 376:cb4d9db17537 121 /** @defgroup IWDG
mbed_official 376:cb4d9db17537 122 * @brief IWDG HAL module driver.
mbed_official 376:cb4d9db17537 123 * @{
mbed_official 376:cb4d9db17537 124 */
mbed_official 376:cb4d9db17537 125
mbed_official 376:cb4d9db17537 126 #ifdef HAL_IWDG_MODULE_ENABLED
mbed_official 376:cb4d9db17537 127
mbed_official 376:cb4d9db17537 128 /* Private typedef -----------------------------------------------------------*/
mbed_official 376:cb4d9db17537 129 /* Private define ------------------------------------------------------------*/
mbed_official 376:cb4d9db17537 130 /* Private macro -------------------------------------------------------------*/
mbed_official 376:cb4d9db17537 131 /* Private variables ---------------------------------------------------------*/
mbed_official 376:cb4d9db17537 132 /* Private function prototypes -----------------------------------------------*/
mbed_official 376:cb4d9db17537 133 /* Private functions ---------------------------------------------------------*/
mbed_official 376:cb4d9db17537 134
mbed_official 376:cb4d9db17537 135 /** @defgroup IWDG_Private_Functions
mbed_official 376:cb4d9db17537 136 * @{
mbed_official 376:cb4d9db17537 137 */
mbed_official 376:cb4d9db17537 138
mbed_official 376:cb4d9db17537 139 /** @defgroup IWDG_Group1 Initialization and de-initialization functions
mbed_official 376:cb4d9db17537 140 * @brief Initialization and Configuration functions.
mbed_official 376:cb4d9db17537 141 *
mbed_official 376:cb4d9db17537 142 @verbatim
mbed_official 376:cb4d9db17537 143 ===============================================================================
mbed_official 376:cb4d9db17537 144 ##### Initialization and de-initialization functions #####
mbed_official 376:cb4d9db17537 145 ===============================================================================
mbed_official 376:cb4d9db17537 146 [..] This section provides functions allowing to:
mbed_official 376:cb4d9db17537 147 (+) Initialize the IWDG according to the specified parameters
mbed_official 376:cb4d9db17537 148 in the IWDG_InitTypeDef and create the associated handle
mbed_official 376:cb4d9db17537 149 (+) Manage Window option
mbed_official 376:cb4d9db17537 150 (+) Initialize the IWDG MSP
mbed_official 376:cb4d9db17537 151
mbed_official 376:cb4d9db17537 152 @endverbatim
mbed_official 376:cb4d9db17537 153 * @{
mbed_official 376:cb4d9db17537 154 */
mbed_official 376:cb4d9db17537 155
mbed_official 376:cb4d9db17537 156 /**
mbed_official 376:cb4d9db17537 157 * @brief Initializes the IWDG according to the specified
mbed_official 376:cb4d9db17537 158 * parameters in the IWDG_InitTypeDef and creates the associated handle.
mbed_official 376:cb4d9db17537 159 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
mbed_official 376:cb4d9db17537 160 * the configuration information for the specified IWDG module.
mbed_official 376:cb4d9db17537 161 * @retval HAL status
mbed_official 376:cb4d9db17537 162 */
mbed_official 376:cb4d9db17537 163 HAL_StatusTypeDef HAL_IWDG_Init(IWDG_HandleTypeDef *hiwdg)
mbed_official 376:cb4d9db17537 164 {
mbed_official 376:cb4d9db17537 165 uint32_t tickstart = 0;
mbed_official 376:cb4d9db17537 166
mbed_official 376:cb4d9db17537 167 /* Check the IWDG handle allocation */
mbed_official 387:643a59b3dbac 168 if(hiwdg == HAL_NULL)
mbed_official 376:cb4d9db17537 169 {
mbed_official 376:cb4d9db17537 170 return HAL_ERROR;
mbed_official 376:cb4d9db17537 171 }
mbed_official 376:cb4d9db17537 172
mbed_official 376:cb4d9db17537 173 /* Check the parameters */
mbed_official 376:cb4d9db17537 174 assert_param(IS_IWDG_PRESCALER(hiwdg->Init.Prescaler));
mbed_official 376:cb4d9db17537 175 assert_param(IS_IWDG_RELOAD(hiwdg->Init.Reload));
mbed_official 376:cb4d9db17537 176 assert_param(IS_IWDG_WINDOW(hiwdg->Init.Window));
mbed_official 376:cb4d9db17537 177
mbed_official 376:cb4d9db17537 178 /* Check pending flag, if previous update not done, return error */
mbed_official 376:cb4d9db17537 179 if((__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_PVU) != RESET)
mbed_official 376:cb4d9db17537 180 &&(__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_RVU) != RESET)
mbed_official 376:cb4d9db17537 181 &&(__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_WVU) != RESET))
mbed_official 376:cb4d9db17537 182 {
mbed_official 376:cb4d9db17537 183 return HAL_ERROR;
mbed_official 376:cb4d9db17537 184 }
mbed_official 376:cb4d9db17537 185
mbed_official 376:cb4d9db17537 186 if(hiwdg->State == HAL_IWDG_STATE_RESET)
mbed_official 376:cb4d9db17537 187 {
mbed_official 376:cb4d9db17537 188 /* Init the low level hardware */
mbed_official 376:cb4d9db17537 189 HAL_IWDG_MspInit(hiwdg);
mbed_official 376:cb4d9db17537 190 }
mbed_official 376:cb4d9db17537 191
mbed_official 376:cb4d9db17537 192 /* Change IWDG peripheral state */
mbed_official 376:cb4d9db17537 193 hiwdg->State = HAL_IWDG_STATE_BUSY;
mbed_official 376:cb4d9db17537 194
mbed_official 376:cb4d9db17537 195 /* Enable write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers */
mbed_official 376:cb4d9db17537 196 /* by writing 0x5555 in KR */
mbed_official 376:cb4d9db17537 197 __HAL_IWDG_ENABLE_WRITE_ACCESS(hiwdg);
mbed_official 376:cb4d9db17537 198
mbed_official 376:cb4d9db17537 199 /* Write to IWDG registers the IWDG_Prescaler & IWDG_Reload values to work with */
mbed_official 376:cb4d9db17537 200 MODIFY_REG(hiwdg->Instance->PR, (uint32_t)IWDG_PR_PR, hiwdg->Init.Prescaler);
mbed_official 376:cb4d9db17537 201 MODIFY_REG(hiwdg->Instance->RLR, (uint32_t)IWDG_RLR_RL, hiwdg->Init.Reload);
mbed_official 376:cb4d9db17537 202
mbed_official 376:cb4d9db17537 203 /* check if window option is enabled */
mbed_official 376:cb4d9db17537 204 if (((hiwdg->Init.Window) != IWDG_WINDOW_DISABLE) || ((hiwdg->Instance->WINR) != IWDG_WINDOW_DISABLE))
mbed_official 376:cb4d9db17537 205 {
mbed_official 376:cb4d9db17537 206 tickstart = HAL_GetTick();
mbed_official 376:cb4d9db17537 207
mbed_official 376:cb4d9db17537 208 /* Wait for register to be updated */
mbed_official 376:cb4d9db17537 209 while((uint32_t)(hiwdg->Instance->SR) != RESET)
mbed_official 376:cb4d9db17537 210 {
mbed_official 376:cb4d9db17537 211 if((HAL_GetTick() - tickstart ) > 1000)
mbed_official 376:cb4d9db17537 212 {
mbed_official 376:cb4d9db17537 213 /* Set IWDG state */
mbed_official 376:cb4d9db17537 214 hiwdg->State = HAL_IWDG_STATE_TIMEOUT;
mbed_official 376:cb4d9db17537 215 return HAL_TIMEOUT;
mbed_official 376:cb4d9db17537 216 }
mbed_official 376:cb4d9db17537 217 }
mbed_official 376:cb4d9db17537 218
mbed_official 376:cb4d9db17537 219 /* Write to IWDG WINR the IWDG_Window value to compare with */
mbed_official 376:cb4d9db17537 220 MODIFY_REG(hiwdg->Instance->WINR, (uint32_t)IWDG_WINR_WIN, hiwdg->Init.Window);
mbed_official 376:cb4d9db17537 221
mbed_official 376:cb4d9db17537 222 }
mbed_official 376:cb4d9db17537 223 /* Change IWDG peripheral state */
mbed_official 376:cb4d9db17537 224 hiwdg->State = HAL_IWDG_STATE_READY;
mbed_official 376:cb4d9db17537 225
mbed_official 376:cb4d9db17537 226 /* Return function status */
mbed_official 376:cb4d9db17537 227 return HAL_OK;
mbed_official 376:cb4d9db17537 228 }
mbed_official 376:cb4d9db17537 229
mbed_official 376:cb4d9db17537 230 /**
mbed_official 376:cb4d9db17537 231 * @brief Initializes the IWDG MSP.
mbed_official 376:cb4d9db17537 232 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
mbed_official 376:cb4d9db17537 233 * the configuration information for the specified IWDG module.
mbed_official 376:cb4d9db17537 234 * @retval None
mbed_official 376:cb4d9db17537 235 */
mbed_official 376:cb4d9db17537 236 __weak void HAL_IWDG_MspInit(IWDG_HandleTypeDef *hiwdg)
mbed_official 376:cb4d9db17537 237 {
mbed_official 376:cb4d9db17537 238 /* NOTE : This function Should not be modified, when the callback is needed,
mbed_official 376:cb4d9db17537 239 the HAL_IWDG_MspInit could be implemented in the user file
mbed_official 376:cb4d9db17537 240 */
mbed_official 376:cb4d9db17537 241 }
mbed_official 376:cb4d9db17537 242
mbed_official 376:cb4d9db17537 243 /**
mbed_official 376:cb4d9db17537 244 * @}
mbed_official 376:cb4d9db17537 245 */
mbed_official 376:cb4d9db17537 246
mbed_official 376:cb4d9db17537 247 /** @defgroup IWDG_Group2 IO operation functions
mbed_official 376:cb4d9db17537 248 * @brief IO operation functions
mbed_official 376:cb4d9db17537 249 *
mbed_official 376:cb4d9db17537 250 @verbatim
mbed_official 376:cb4d9db17537 251 ===============================================================================
mbed_official 376:cb4d9db17537 252 ##### IO operation functions #####
mbed_official 376:cb4d9db17537 253 ===============================================================================
mbed_official 376:cb4d9db17537 254 [..] This section provides functions allowing to:
mbed_official 376:cb4d9db17537 255 (+) Start the IWDG.
mbed_official 376:cb4d9db17537 256 (+) Refresh the IWDG.
mbed_official 376:cb4d9db17537 257
mbed_official 376:cb4d9db17537 258 @endverbatim
mbed_official 376:cb4d9db17537 259 * @{
mbed_official 376:cb4d9db17537 260 */
mbed_official 376:cb4d9db17537 261
mbed_official 376:cb4d9db17537 262 /**
mbed_official 376:cb4d9db17537 263 * @brief Starts the IWDG.
mbed_official 376:cb4d9db17537 264 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
mbed_official 376:cb4d9db17537 265 * the configuration information for the specified IWDG module.
mbed_official 376:cb4d9db17537 266 * @retval HAL status
mbed_official 376:cb4d9db17537 267 */
mbed_official 376:cb4d9db17537 268 HAL_StatusTypeDef HAL_IWDG_Start(IWDG_HandleTypeDef *hiwdg)
mbed_official 376:cb4d9db17537 269 {
mbed_official 376:cb4d9db17537 270 uint32_t tickstart = 0;
mbed_official 376:cb4d9db17537 271
mbed_official 376:cb4d9db17537 272 /* Process locked */
mbed_official 376:cb4d9db17537 273 __HAL_LOCK(hiwdg);
mbed_official 376:cb4d9db17537 274
mbed_official 376:cb4d9db17537 275 /* Change IWDG peripheral state */
mbed_official 376:cb4d9db17537 276 hiwdg->State = HAL_IWDG_STATE_BUSY;
mbed_official 376:cb4d9db17537 277
mbed_official 376:cb4d9db17537 278 /* Reload IWDG counter with value defined in the RLR register */
mbed_official 376:cb4d9db17537 279 if ((hiwdg->Init.Window) == IWDG_WINDOW_DISABLE)
mbed_official 376:cb4d9db17537 280 {
mbed_official 376:cb4d9db17537 281 __HAL_IWDG_RELOAD_COUNTER(hiwdg);
mbed_official 376:cb4d9db17537 282 }
mbed_official 376:cb4d9db17537 283
mbed_official 376:cb4d9db17537 284 /* Enable the IWDG peripheral */
mbed_official 376:cb4d9db17537 285 __HAL_IWDG_START(hiwdg);
mbed_official 376:cb4d9db17537 286
mbed_official 376:cb4d9db17537 287 tickstart = HAL_GetTick();
mbed_official 376:cb4d9db17537 288
mbed_official 376:cb4d9db17537 289 /* Wait until PVU, RVU, WVU flag are RESET */
mbed_official 376:cb4d9db17537 290 while( (__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_PVU) != RESET)
mbed_official 376:cb4d9db17537 291 &&(__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_RVU) != RESET)
mbed_official 376:cb4d9db17537 292 &&(__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_WVU) != RESET) )
mbed_official 376:cb4d9db17537 293 {
mbed_official 376:cb4d9db17537 294
mbed_official 376:cb4d9db17537 295 if((HAL_GetTick() - tickstart ) > 1000)
mbed_official 376:cb4d9db17537 296 {
mbed_official 376:cb4d9db17537 297 /* Set IWDG state */
mbed_official 376:cb4d9db17537 298 hiwdg->State = HAL_IWDG_STATE_TIMEOUT;
mbed_official 376:cb4d9db17537 299
mbed_official 376:cb4d9db17537 300 /* Process unlocked */
mbed_official 376:cb4d9db17537 301 __HAL_UNLOCK(hiwdg);
mbed_official 376:cb4d9db17537 302
mbed_official 376:cb4d9db17537 303 return HAL_TIMEOUT;
mbed_official 376:cb4d9db17537 304 }
mbed_official 376:cb4d9db17537 305 }
mbed_official 376:cb4d9db17537 306
mbed_official 376:cb4d9db17537 307 /* Change IWDG peripheral state */
mbed_official 376:cb4d9db17537 308 hiwdg->State = HAL_IWDG_STATE_READY;
mbed_official 376:cb4d9db17537 309
mbed_official 376:cb4d9db17537 310 /* Process Unlocked */
mbed_official 376:cb4d9db17537 311 __HAL_UNLOCK(hiwdg);
mbed_official 376:cb4d9db17537 312
mbed_official 376:cb4d9db17537 313 /* Return function status */
mbed_official 376:cb4d9db17537 314 return HAL_OK;
mbed_official 376:cb4d9db17537 315 }
mbed_official 376:cb4d9db17537 316
mbed_official 376:cb4d9db17537 317 /**
mbed_official 376:cb4d9db17537 318 * @brief Refreshes the IWDG.
mbed_official 376:cb4d9db17537 319 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
mbed_official 376:cb4d9db17537 320 * the configuration information for the specified IWDG module.
mbed_official 376:cb4d9db17537 321 * @retval HAL status
mbed_official 376:cb4d9db17537 322 */
mbed_official 376:cb4d9db17537 323 HAL_StatusTypeDef HAL_IWDG_Refresh(IWDG_HandleTypeDef *hiwdg)
mbed_official 376:cb4d9db17537 324 {
mbed_official 376:cb4d9db17537 325 uint32_t tickstart = 0;
mbed_official 376:cb4d9db17537 326
mbed_official 376:cb4d9db17537 327 /* Process Locked */
mbed_official 376:cb4d9db17537 328 __HAL_LOCK(hiwdg);
mbed_official 376:cb4d9db17537 329
mbed_official 376:cb4d9db17537 330 /* Change IWDG peripheral state */
mbed_official 376:cb4d9db17537 331 hiwdg->State = HAL_IWDG_STATE_BUSY;
mbed_official 376:cb4d9db17537 332
mbed_official 376:cb4d9db17537 333 tickstart = HAL_GetTick();
mbed_official 376:cb4d9db17537 334
mbed_official 376:cb4d9db17537 335 /* Wait until RVU flag is RESET */
mbed_official 376:cb4d9db17537 336 while(__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_RVU) != RESET)
mbed_official 376:cb4d9db17537 337 {
mbed_official 376:cb4d9db17537 338 if((HAL_GetTick() - tickstart ) > 1000)
mbed_official 376:cb4d9db17537 339 {
mbed_official 376:cb4d9db17537 340 /* Set IWDG state */
mbed_official 376:cb4d9db17537 341 hiwdg->State = HAL_IWDG_STATE_TIMEOUT;
mbed_official 376:cb4d9db17537 342
mbed_official 376:cb4d9db17537 343 /* Process unlocked */
mbed_official 376:cb4d9db17537 344 __HAL_UNLOCK(hiwdg);
mbed_official 376:cb4d9db17537 345
mbed_official 376:cb4d9db17537 346 return HAL_TIMEOUT;
mbed_official 376:cb4d9db17537 347 }
mbed_official 376:cb4d9db17537 348 }
mbed_official 376:cb4d9db17537 349
mbed_official 376:cb4d9db17537 350 /* Reload IWDG counter with value defined in the reload register */
mbed_official 376:cb4d9db17537 351 __HAL_IWDG_RELOAD_COUNTER(hiwdg);
mbed_official 376:cb4d9db17537 352
mbed_official 376:cb4d9db17537 353 /* Change IWDG peripheral state */
mbed_official 376:cb4d9db17537 354 hiwdg->State = HAL_IWDG_STATE_READY;
mbed_official 376:cb4d9db17537 355
mbed_official 376:cb4d9db17537 356 /* Process Unlocked */
mbed_official 376:cb4d9db17537 357 __HAL_UNLOCK(hiwdg);
mbed_official 376:cb4d9db17537 358
mbed_official 376:cb4d9db17537 359 /* Return function status */
mbed_official 376:cb4d9db17537 360 return HAL_OK;
mbed_official 376:cb4d9db17537 361 }
mbed_official 376:cb4d9db17537 362
mbed_official 376:cb4d9db17537 363 /**
mbed_official 376:cb4d9db17537 364 * @}
mbed_official 376:cb4d9db17537 365 */
mbed_official 376:cb4d9db17537 366
mbed_official 376:cb4d9db17537 367 /** @defgroup IWDG_Group3 Peripheral State functions
mbed_official 376:cb4d9db17537 368 * @brief Peripheral State functions.
mbed_official 376:cb4d9db17537 369 *
mbed_official 376:cb4d9db17537 370 @verbatim
mbed_official 376:cb4d9db17537 371 ===============================================================================
mbed_official 376:cb4d9db17537 372 ##### Peripheral State functions #####
mbed_official 376:cb4d9db17537 373 ===============================================================================
mbed_official 376:cb4d9db17537 374 [..]
mbed_official 376:cb4d9db17537 375 This subsection permits to get in run-time the status of the peripheral
mbed_official 376:cb4d9db17537 376 and the data flow.
mbed_official 376:cb4d9db17537 377
mbed_official 376:cb4d9db17537 378 @endverbatim
mbed_official 376:cb4d9db17537 379 * @{
mbed_official 376:cb4d9db17537 380 */
mbed_official 376:cb4d9db17537 381
mbed_official 376:cb4d9db17537 382 /**
mbed_official 376:cb4d9db17537 383 * @brief Returns the IWDG state.
mbed_official 376:cb4d9db17537 384 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
mbed_official 376:cb4d9db17537 385 * the configuration information for the specified IWDG module.
mbed_official 376:cb4d9db17537 386 * @retval HAL state
mbed_official 376:cb4d9db17537 387 */
mbed_official 376:cb4d9db17537 388 HAL_IWDG_StateTypeDef HAL_IWDG_GetState(IWDG_HandleTypeDef *hiwdg)
mbed_official 376:cb4d9db17537 389 {
mbed_official 376:cb4d9db17537 390 return hiwdg->State;
mbed_official 376:cb4d9db17537 391 }
mbed_official 376:cb4d9db17537 392
mbed_official 376:cb4d9db17537 393 /**
mbed_official 376:cb4d9db17537 394 * @}
mbed_official 376:cb4d9db17537 395 */
mbed_official 376:cb4d9db17537 396
mbed_official 376:cb4d9db17537 397 /**
mbed_official 376:cb4d9db17537 398 * @}
mbed_official 376:cb4d9db17537 399 */
mbed_official 376:cb4d9db17537 400
mbed_official 376:cb4d9db17537 401 #endif /* HAL_IWDG_MODULE_ENABLED */
mbed_official 376:cb4d9db17537 402 /**
mbed_official 376:cb4d9db17537 403 * @}
mbed_official 376:cb4d9db17537 404 */
mbed_official 376:cb4d9db17537 405
mbed_official 376:cb4d9db17537 406 /**
mbed_official 376:cb4d9db17537 407 * @}
mbed_official 376:cb4d9db17537 408 */
mbed_official 376:cb4d9db17537 409
mbed_official 376:cb4d9db17537 410 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/