PHung Tung / SRC_STM32F7

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targets/cmsis/TARGET_STM/TARGET_STM32F7/stm32f7xx_hal_iwdg.c@0:e87aa4c49e95, 2019-06-04 (annotated)

Committer:
phungductung
Date:
Tue Jun 04 21:51:46 2019 +0000
Revision:
0:e87aa4c49e95
libray

Who changed what in which revision?

UserRevisionLine numberNew contents of line
phungductung 0:e87aa4c49e95 1 /**
phungductung 0:e87aa4c49e95 2 ******************************************************************************
phungductung 0:e87aa4c49e95 3 * @file stm32f7xx_hal_iwdg.c
phungductung 0:e87aa4c49e95 4 * @author MCD Application Team
phungductung 0:e87aa4c49e95 5 * @version V1.0.4
phungductung 0:e87aa4c49e95 6 * @date 09-December-2015
phungductung 0:e87aa4c49e95 7 * @brief IWDG HAL module driver.
phungductung 0:e87aa4c49e95 8 *
phungductung 0:e87aa4c49e95 9 * This file provides firmware functions to manage the following
phungductung 0:e87aa4c49e95 10 * functionalities of the Independent Watchdog (IWDG) peripheral:
phungductung 0:e87aa4c49e95 11 * + Initialization and de-initialization functions
phungductung 0:e87aa4c49e95 12 * + IO operation functions
phungductung 0:e87aa4c49e95 13 * + Peripheral State functions
phungductung 0:e87aa4c49e95 14 *
phungductung 0:e87aa4c49e95 15 @verbatim
phungductung 0:e87aa4c49e95 16 ==============================================================================
phungductung 0:e87aa4c49e95 17 ##### IWDG Generic features #####
phungductung 0:e87aa4c49e95 18 ==============================================================================
phungductung 0:e87aa4c49e95 19 [..]
phungductung 0:e87aa4c49e95 20 (+) The IWDG can be started by either software or hardware (configurable
phungductung 0:e87aa4c49e95 21 through option byte).
phungductung 0:e87aa4c49e95 22
phungductung 0:e87aa4c49e95 23 (+) The IWDG is clocked by its own dedicated Low-Speed clock (LSI) and
phungductung 0:e87aa4c49e95 24 thus stays active even if the main clock fails.
phungductung 0:e87aa4c49e95 25 Once the IWDG is started, the LSI is forced ON and cannot be disabled
phungductung 0:e87aa4c49e95 26 (LSI cannot be disabled too), and the counter starts counting down from
phungductung 0:e87aa4c49e95 27 the reset value of 0xFFF. When it reaches the end of count value (0x000)
phungductung 0:e87aa4c49e95 28 a system reset is generated.
phungductung 0:e87aa4c49e95 29
phungductung 0:e87aa4c49e95 30 (+) The IWDG counter should be refreshed at regular intervals, otherwise the
phungductung 0:e87aa4c49e95 31 watchdog generates an MCU reset when the counter reaches 0.
phungductung 0:e87aa4c49e95 32
phungductung 0:e87aa4c49e95 33 (+) The IWDG is implemented in the VDD voltage domain that is still functional
phungductung 0:e87aa4c49e95 34 in STOP and STANDBY mode (IWDG reset can wake-up from STANDBY).
phungductung 0:e87aa4c49e95 35 IWDGRST flag in RCC_CSR register can be used to inform when an IWDG
phungductung 0:e87aa4c49e95 36 reset occurs.
phungductung 0:e87aa4c49e95 37
phungductung 0:e87aa4c49e95 38 [..] Min-max timeout value @32KHz (LSI): ~125us / ~32.7s
phungductung 0:e87aa4c49e95 39 The IWDG timeout may vary due to LSI frequency dispersion. STM32L4xx
phungductung 0:e87aa4c49e95 40 devices provide the capability to measure the LSI frequency (LSI clock
phungductung 0:e87aa4c49e95 41 connected internally to TIM16 CH1 input capture). The measured value
phungductung 0:e87aa4c49e95 42 can be used to have an IWDG timeout with an acceptable accuracy.
phungductung 0:e87aa4c49e95 43
phungductung 0:e87aa4c49e95 44
phungductung 0:e87aa4c49e95 45 ##### How to use this driver #####
phungductung 0:e87aa4c49e95 46 ==============================================================================
phungductung 0:e87aa4c49e95 47 [..]
phungductung 0:e87aa4c49e95 48 If Window option is disabled
phungductung 0:e87aa4c49e95 49
phungductung 0:e87aa4c49e95 50 (+) Use IWDG using HAL_IWDG_Init() function to :
phungductung 0:e87aa4c49e95 51 (++) Enable write access to IWDG_PR, IWDG_RLR.
phungductung 0:e87aa4c49e95 52 (++) Configure the IWDG prescaler, counter reload value.
phungductung 0:e87aa4c49e95 53 This reload value will be loaded in the IWDG counter each time the counter
phungductung 0:e87aa4c49e95 54 is reloaded, then the IWDG will start counting down from this value.
phungductung 0:e87aa4c49e95 55 (+) Use IWDG using HAL_IWDG_Start() function to :
phungductung 0:e87aa4c49e95 56 (++) Reload IWDG counter with value defined in the IWDG_RLR register.
phungductung 0:e87aa4c49e95 57 (++) Start the IWDG, when the IWDG is used in software mode (no need
phungductung 0:e87aa4c49e95 58 to enable the LSI, it will be enabled by hardware).
phungductung 0:e87aa4c49e95 59 (+) Then the application program must refresh the IWDG counter at regular
phungductung 0:e87aa4c49e95 60 intervals during normal operation to prevent an MCU reset, using
phungductung 0:e87aa4c49e95 61 HAL_IWDG_Refresh() function.
phungductung 0:e87aa4c49e95 62 [..]
phungductung 0:e87aa4c49e95 63 if Window option is enabled:
phungductung 0:e87aa4c49e95 64
phungductung 0:e87aa4c49e95 65 (+) Use IWDG using HAL_IWDG_Start() function to enable IWDG downcounter
phungductung 0:e87aa4c49e95 66 (+) Use IWDG using HAL_IWDG_Init() function to :
phungductung 0:e87aa4c49e95 67 (++) Enable write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers.
phungductung 0:e87aa4c49e95 68 (++) Configure the IWDG prescaler, reload value and window value.
phungductung 0:e87aa4c49e95 69 (+) Then the application program must refresh the IWDG counter at regular
phungductung 0:e87aa4c49e95 70 intervals during normal operation to prevent an MCU reset, using
phungductung 0:e87aa4c49e95 71 HAL_IWDG_Refresh() function.
phungductung 0:e87aa4c49e95 72
phungductung 0:e87aa4c49e95 73 *** IWDG HAL driver macros list ***
phungductung 0:e87aa4c49e95 74 ====================================
phungductung 0:e87aa4c49e95 75 [..]
phungductung 0:e87aa4c49e95 76 Below the list of most used macros in IWDG HAL driver.
phungductung 0:e87aa4c49e95 77
phungductung 0:e87aa4c49e95 78 (+) __HAL_IWDG_START: Enable the IWDG peripheral
phungductung 0:e87aa4c49e95 79 (+) __HAL_IWDG_RELOAD_COUNTER: Reloads IWDG counter with value defined in the reload register
phungductung 0:e87aa4c49e95 80 (+) __HAL_IWDG_GET_FLAG: Get the selected IWDG's flag status
phungductung 0:e87aa4c49e95 81 (+) IWDG_ENABLE_WRITE_ACCESS : Enable write access to IWDG_PR and IWDG_RLR registers
phungductung 0:e87aa4c49e95 82 (+) IWDG_DISABLE_WRITE_ACCESS : Disable write access to IWDG_PR and IWDG_RLR registers
phungductung 0:e87aa4c49e95 83
phungductung 0:e87aa4c49e95 84 @endverbatim
phungductung 0:e87aa4c49e95 85 ******************************************************************************
phungductung 0:e87aa4c49e95 86 * @attention
phungductung 0:e87aa4c49e95 87 *
phungductung 0:e87aa4c49e95 88 * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
phungductung 0:e87aa4c49e95 89 *
phungductung 0:e87aa4c49e95 90 * Redistribution and use in source and binary forms, with or without modification,
phungductung 0:e87aa4c49e95 91 * are permitted provided that the following conditions are met:
phungductung 0:e87aa4c49e95 92 * 1. Redistributions of source code must retain the above copyright notice,
phungductung 0:e87aa4c49e95 93 * this list of conditions and the following disclaimer.
phungductung 0:e87aa4c49e95 94 * 2. Redistributions in binary form must reproduce the above copyright notice,
phungductung 0:e87aa4c49e95 95 * this list of conditions and the following disclaimer in the documentation
phungductung 0:e87aa4c49e95 96 * and/or other materials provided with the distribution.
phungductung 0:e87aa4c49e95 97 * 3. Neither the name of STMicroelectronics nor the names of its contributors
phungductung 0:e87aa4c49e95 98 * may be used to endorse or promote products derived from this software
phungductung 0:e87aa4c49e95 99 * without specific prior written permission.
phungductung 0:e87aa4c49e95 100 *
phungductung 0:e87aa4c49e95 101 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
phungductung 0:e87aa4c49e95 102 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
phungductung 0:e87aa4c49e95 103 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
phungductung 0:e87aa4c49e95 104 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
phungductung 0:e87aa4c49e95 105 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
phungductung 0:e87aa4c49e95 106 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
phungductung 0:e87aa4c49e95 107 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
phungductung 0:e87aa4c49e95 108 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
phungductung 0:e87aa4c49e95 109 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
phungductung 0:e87aa4c49e95 110 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
phungductung 0:e87aa4c49e95 111 *
phungductung 0:e87aa4c49e95 112 ******************************************************************************
phungductung 0:e87aa4c49e95 113 */
phungductung 0:e87aa4c49e95 114
phungductung 0:e87aa4c49e95 115 /* Includes ------------------------------------------------------------------*/
phungductung 0:e87aa4c49e95 116 #include "stm32f7xx_hal.h"
phungductung 0:e87aa4c49e95 117
phungductung 0:e87aa4c49e95 118 /** @addtogroup STM32F7xx_HAL_Driver
phungductung 0:e87aa4c49e95 119 * @{
phungductung 0:e87aa4c49e95 120 */
phungductung 0:e87aa4c49e95 121
phungductung 0:e87aa4c49e95 122 /** @defgroup IWDG IWDG HAL module driver
phungductung 0:e87aa4c49e95 123 * @brief IWDG HAL module driver.
phungductung 0:e87aa4c49e95 124 * @{
phungductung 0:e87aa4c49e95 125 */
phungductung 0:e87aa4c49e95 126
phungductung 0:e87aa4c49e95 127 #ifdef HAL_IWDG_MODULE_ENABLED
phungductung 0:e87aa4c49e95 128
phungductung 0:e87aa4c49e95 129 /* Private typedef -----------------------------------------------------------*/
phungductung 0:e87aa4c49e95 130 /* Private define ------------------------------------------------------------*/
phungductung 0:e87aa4c49e95 131 /** @defgroup IWDG_Private_Defines IWDG Private Defines
phungductung 0:e87aa4c49e95 132 * @{
phungductung 0:e87aa4c49e95 133 */
phungductung 0:e87aa4c49e95 134
phungductung 0:e87aa4c49e95 135 #define HAL_IWDG_DEFAULT_TIMEOUT (uint32_t)1000
phungductung 0:e87aa4c49e95 136
phungductung 0:e87aa4c49e95 137 /**
phungductung 0:e87aa4c49e95 138 * @}
phungductung 0:e87aa4c49e95 139 */
phungductung 0:e87aa4c49e95 140 /* Private macro -------------------------------------------------------------*/
phungductung 0:e87aa4c49e95 141 /* Private variables ---------------------------------------------------------*/
phungductung 0:e87aa4c49e95 142 /* Private function prototypes -----------------------------------------------*/
phungductung 0:e87aa4c49e95 143 /* Exported functions --------------------------------------------------------*/
phungductung 0:e87aa4c49e95 144
phungductung 0:e87aa4c49e95 145 /** @defgroup IWDG_Exported_Functions IWDG Exported Functions
phungductung 0:e87aa4c49e95 146 * @{
phungductung 0:e87aa4c49e95 147 */
phungductung 0:e87aa4c49e95 148
phungductung 0:e87aa4c49e95 149 /** @defgroup IWDG_Exported_Functions_Group1 Initialization and de-initialization functions
phungductung 0:e87aa4c49e95 150 * @brief Initialization and Configuration functions.
phungductung 0:e87aa4c49e95 151 *
phungductung 0:e87aa4c49e95 152 @verbatim
phungductung 0:e87aa4c49e95 153 ===============================================================================
phungductung 0:e87aa4c49e95 154 ##### Initialization and de-initialization functions #####
phungductung 0:e87aa4c49e95 155 ===============================================================================
phungductung 0:e87aa4c49e95 156 [..] This section provides functions allowing to:
phungductung 0:e87aa4c49e95 157 (+) Initialize the IWDG according to the specified parameters
phungductung 0:e87aa4c49e95 158 in the IWDG_InitTypeDef and create the associated handle
phungductung 0:e87aa4c49e95 159 (+) Manage Window option
phungductung 0:e87aa4c49e95 160 (+) Initialize the IWDG MSP
phungductung 0:e87aa4c49e95 161 (+) DeInitialize IWDG MSP
phungductung 0:e87aa4c49e95 162
phungductung 0:e87aa4c49e95 163 @endverbatim
phungductung 0:e87aa4c49e95 164 * @{
phungductung 0:e87aa4c49e95 165 */
phungductung 0:e87aa4c49e95 166
phungductung 0:e87aa4c49e95 167 /**
phungductung 0:e87aa4c49e95 168 * @brief Initializes the IWDG according to the specified
phungductung 0:e87aa4c49e95 169 * parameters in the IWDG_InitTypeDef and creates the associated handle.
phungductung 0:e87aa4c49e95 170 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
phungductung 0:e87aa4c49e95 171 * the configuration information for the specified IWDG module.
phungductung 0:e87aa4c49e95 172 * @retval HAL status
phungductung 0:e87aa4c49e95 173 */
phungductung 0:e87aa4c49e95 174 HAL_StatusTypeDef HAL_IWDG_Init(IWDG_HandleTypeDef *hiwdg)
phungductung 0:e87aa4c49e95 175 {
phungductung 0:e87aa4c49e95 176 uint32_t tickstart = 0;
phungductung 0:e87aa4c49e95 177
phungductung 0:e87aa4c49e95 178 /* Check the IWDG handle allocation */
phungductung 0:e87aa4c49e95 179 if(hiwdg == NULL)
phungductung 0:e87aa4c49e95 180 {
phungductung 0:e87aa4c49e95 181 return HAL_ERROR;
phungductung 0:e87aa4c49e95 182 }
phungductung 0:e87aa4c49e95 183
phungductung 0:e87aa4c49e95 184 /* Check the parameters */
phungductung 0:e87aa4c49e95 185 assert_param(IS_IWDG_PRESCALER(hiwdg->Init.Prescaler));
phungductung 0:e87aa4c49e95 186 assert_param(IS_IWDG_RELOAD(hiwdg->Init.Reload));
phungductung 0:e87aa4c49e95 187 assert_param(IS_IWDG_WINDOW(hiwdg->Init.Window));
phungductung 0:e87aa4c49e95 188
phungductung 0:e87aa4c49e95 189 /* Check pending flag, if previous update not done, return error */
phungductung 0:e87aa4c49e95 190 if((__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_PVU) != RESET)
phungductung 0:e87aa4c49e95 191 &&(__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_RVU) != RESET)
phungductung 0:e87aa4c49e95 192 &&(__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_WVU) != RESET))
phungductung 0:e87aa4c49e95 193 {
phungductung 0:e87aa4c49e95 194 return HAL_ERROR;
phungductung 0:e87aa4c49e95 195 }
phungductung 0:e87aa4c49e95 196
phungductung 0:e87aa4c49e95 197 if(hiwdg->State == HAL_IWDG_STATE_RESET)
phungductung 0:e87aa4c49e95 198 {
phungductung 0:e87aa4c49e95 199 /* Allocate lock resource and initialize it */
phungductung 0:e87aa4c49e95 200 hiwdg->Lock = HAL_UNLOCKED;
phungductung 0:e87aa4c49e95 201
phungductung 0:e87aa4c49e95 202 /* Init the low level hardware */
phungductung 0:e87aa4c49e95 203 HAL_IWDG_MspInit(hiwdg);
phungductung 0:e87aa4c49e95 204 }
phungductung 0:e87aa4c49e95 205
phungductung 0:e87aa4c49e95 206 /* Change IWDG peripheral state */
phungductung 0:e87aa4c49e95 207 hiwdg->State = HAL_IWDG_STATE_BUSY;
phungductung 0:e87aa4c49e95 208
phungductung 0:e87aa4c49e95 209 /* Enable write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers */
phungductung 0:e87aa4c49e95 210 /* by writing 0x00005555 in KR */
phungductung 0:e87aa4c49e95 211 IWDG_ENABLE_WRITE_ACCESS(hiwdg);
phungductung 0:e87aa4c49e95 212
phungductung 0:e87aa4c49e95 213 /* Write to IWDG registers the IWDG_Prescaler & IWDG_Reload values to work with */
phungductung 0:e87aa4c49e95 214 MODIFY_REG(hiwdg->Instance->PR, (uint32_t)IWDG_PR_PR, hiwdg->Init.Prescaler);
phungductung 0:e87aa4c49e95 215 MODIFY_REG(hiwdg->Instance->RLR, (uint32_t)IWDG_RLR_RL, hiwdg->Init.Reload);
phungductung 0:e87aa4c49e95 216
phungductung 0:e87aa4c49e95 217 /* check if window option is enabled */
phungductung 0:e87aa4c49e95 218 if (((hiwdg->Init.Window) != IWDG_WINDOW_DISABLE) || ((hiwdg->Instance->WINR) != IWDG_WINDOW_DISABLE))
phungductung 0:e87aa4c49e95 219 {
phungductung 0:e87aa4c49e95 220 tickstart = HAL_GetTick();
phungductung 0:e87aa4c49e95 221
phungductung 0:e87aa4c49e95 222 /* Wait for register to be updated */
phungductung 0:e87aa4c49e95 223 while((uint32_t)(hiwdg->Instance->SR) != RESET)
phungductung 0:e87aa4c49e95 224 {
phungductung 0:e87aa4c49e95 225 if((HAL_GetTick() - tickstart ) > HAL_IWDG_DEFAULT_TIMEOUT)
phungductung 0:e87aa4c49e95 226 {
phungductung 0:e87aa4c49e95 227 /* Set IWDG state */
phungductung 0:e87aa4c49e95 228 hiwdg->State = HAL_IWDG_STATE_TIMEOUT;
phungductung 0:e87aa4c49e95 229 return HAL_TIMEOUT;
phungductung 0:e87aa4c49e95 230 }
phungductung 0:e87aa4c49e95 231 }
phungductung 0:e87aa4c49e95 232
phungductung 0:e87aa4c49e95 233 /* Write to IWDG WINR the IWDG_Window value to compare with */
phungductung 0:e87aa4c49e95 234 MODIFY_REG(hiwdg->Instance->WINR, (uint32_t)IWDG_WINR_WIN, hiwdg->Init.Window);
phungductung 0:e87aa4c49e95 235 }
phungductung 0:e87aa4c49e95 236
phungductung 0:e87aa4c49e95 237 /* Change IWDG peripheral state */
phungductung 0:e87aa4c49e95 238 hiwdg->State = HAL_IWDG_STATE_READY;
phungductung 0:e87aa4c49e95 239
phungductung 0:e87aa4c49e95 240 /* Return function status */
phungductung 0:e87aa4c49e95 241 return HAL_OK;
phungductung 0:e87aa4c49e95 242 }
phungductung 0:e87aa4c49e95 243
phungductung 0:e87aa4c49e95 244 /**
phungductung 0:e87aa4c49e95 245 * @brief Initializes the IWDG MSP.
phungductung 0:e87aa4c49e95 246 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
phungductung 0:e87aa4c49e95 247 * the configuration information for the specified IWDG module.
phungductung 0:e87aa4c49e95 248 * @retval None
phungductung 0:e87aa4c49e95 249 */
phungductung 0:e87aa4c49e95 250 __weak void HAL_IWDG_MspInit(IWDG_HandleTypeDef *hiwdg)
phungductung 0:e87aa4c49e95 251 {
phungductung 0:e87aa4c49e95 252 /* Prevent unused argument(s) compilation warning */
phungductung 0:e87aa4c49e95 253 UNUSED(hiwdg);
phungductung 0:e87aa4c49e95 254
phungductung 0:e87aa4c49e95 255 /* NOTE : This function should not be modified, when the callback is needed,
phungductung 0:e87aa4c49e95 256 the HAL_IWDG_MspInit could be implemented in the user file
phungductung 0:e87aa4c49e95 257 */
phungductung 0:e87aa4c49e95 258 }
phungductung 0:e87aa4c49e95 259
phungductung 0:e87aa4c49e95 260 /**
phungductung 0:e87aa4c49e95 261 * @}
phungductung 0:e87aa4c49e95 262 */
phungductung 0:e87aa4c49e95 263
phungductung 0:e87aa4c49e95 264 /** @defgroup IWDG_Exported_Functions_Group2 IO operation functions
phungductung 0:e87aa4c49e95 265 * @brief IO operation functions
phungductung 0:e87aa4c49e95 266 *
phungductung 0:e87aa4c49e95 267 @verbatim
phungductung 0:e87aa4c49e95 268 ===============================================================================
phungductung 0:e87aa4c49e95 269 ##### IO operation functions #####
phungductung 0:e87aa4c49e95 270 ===============================================================================
phungductung 0:e87aa4c49e95 271 [..] This section provides functions allowing to:
phungductung 0:e87aa4c49e95 272 (+) Start the IWDG.
phungductung 0:e87aa4c49e95 273 (+) Refresh the IWDG.
phungductung 0:e87aa4c49e95 274
phungductung 0:e87aa4c49e95 275 @endverbatim
phungductung 0:e87aa4c49e95 276 * @{
phungductung 0:e87aa4c49e95 277 */
phungductung 0:e87aa4c49e95 278
phungductung 0:e87aa4c49e95 279 /**
phungductung 0:e87aa4c49e95 280 * @brief Starts the IWDG.
phungductung 0:e87aa4c49e95 281 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
phungductung 0:e87aa4c49e95 282 * the configuration information for the specified IWDG module.
phungductung 0:e87aa4c49e95 283 * @retval HAL status
phungductung 0:e87aa4c49e95 284 */
phungductung 0:e87aa4c49e95 285 HAL_StatusTypeDef HAL_IWDG_Start(IWDG_HandleTypeDef *hiwdg)
phungductung 0:e87aa4c49e95 286 {
phungductung 0:e87aa4c49e95 287 uint32_t tickstart = 0;
phungductung 0:e87aa4c49e95 288
phungductung 0:e87aa4c49e95 289 /* Process locked */
phungductung 0:e87aa4c49e95 290 __HAL_LOCK(hiwdg);
phungductung 0:e87aa4c49e95 291
phungductung 0:e87aa4c49e95 292 /* Change IWDG peripheral state */
phungductung 0:e87aa4c49e95 293 hiwdg->State = HAL_IWDG_STATE_BUSY;
phungductung 0:e87aa4c49e95 294
phungductung 0:e87aa4c49e95 295 /* Reload IWDG counter with value defined in the RLR register */
phungductung 0:e87aa4c49e95 296 if ((hiwdg->Init.Window) == IWDG_WINDOW_DISABLE)
phungductung 0:e87aa4c49e95 297 {
phungductung 0:e87aa4c49e95 298 __HAL_IWDG_RELOAD_COUNTER(hiwdg);
phungductung 0:e87aa4c49e95 299 }
phungductung 0:e87aa4c49e95 300
phungductung 0:e87aa4c49e95 301 /* Start the IWDG peripheral */
phungductung 0:e87aa4c49e95 302 __HAL_IWDG_START(hiwdg);
phungductung 0:e87aa4c49e95 303
phungductung 0:e87aa4c49e95 304 tickstart = HAL_GetTick();
phungductung 0:e87aa4c49e95 305
phungductung 0:e87aa4c49e95 306 /* Wait until PVU, RVU, WVU flag are RESET */
phungductung 0:e87aa4c49e95 307 while( (__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_PVU) != RESET)
phungductung 0:e87aa4c49e95 308 &&(__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_RVU) != RESET)
phungductung 0:e87aa4c49e95 309 &&(__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_WVU) != RESET) )
phungductung 0:e87aa4c49e95 310 {
phungductung 0:e87aa4c49e95 311
phungductung 0:e87aa4c49e95 312 if((HAL_GetTick() - tickstart ) > HAL_IWDG_DEFAULT_TIMEOUT)
phungductung 0:e87aa4c49e95 313 {
phungductung 0:e87aa4c49e95 314 /* Set IWDG state */
phungductung 0:e87aa4c49e95 315 hiwdg->State = HAL_IWDG_STATE_TIMEOUT;
phungductung 0:e87aa4c49e95 316
phungductung 0:e87aa4c49e95 317 /* Process unlocked */
phungductung 0:e87aa4c49e95 318 __HAL_UNLOCK(hiwdg);
phungductung 0:e87aa4c49e95 319
phungductung 0:e87aa4c49e95 320 return HAL_TIMEOUT;
phungductung 0:e87aa4c49e95 321 }
phungductung 0:e87aa4c49e95 322 }
phungductung 0:e87aa4c49e95 323
phungductung 0:e87aa4c49e95 324 /* Change IWDG peripheral state */
phungductung 0:e87aa4c49e95 325 hiwdg->State = HAL_IWDG_STATE_READY;
phungductung 0:e87aa4c49e95 326
phungductung 0:e87aa4c49e95 327 /* Process Unlocked */
phungductung 0:e87aa4c49e95 328 __HAL_UNLOCK(hiwdg);
phungductung 0:e87aa4c49e95 329
phungductung 0:e87aa4c49e95 330 /* Return function status */
phungductung 0:e87aa4c49e95 331 return HAL_OK;
phungductung 0:e87aa4c49e95 332 }
phungductung 0:e87aa4c49e95 333
phungductung 0:e87aa4c49e95 334 /**
phungductung 0:e87aa4c49e95 335 * @brief Refreshes the IWDG.
phungductung 0:e87aa4c49e95 336 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
phungductung 0:e87aa4c49e95 337 * the configuration information for the specified IWDG module.
phungductung 0:e87aa4c49e95 338 * @retval HAL status
phungductung 0:e87aa4c49e95 339 */
phungductung 0:e87aa4c49e95 340 HAL_StatusTypeDef HAL_IWDG_Refresh(IWDG_HandleTypeDef *hiwdg)
phungductung 0:e87aa4c49e95 341 {
phungductung 0:e87aa4c49e95 342 uint32_t tickstart = 0;
phungductung 0:e87aa4c49e95 343
phungductung 0:e87aa4c49e95 344 /* Process Locked */
phungductung 0:e87aa4c49e95 345 __HAL_LOCK(hiwdg);
phungductung 0:e87aa4c49e95 346
phungductung 0:e87aa4c49e95 347 /* Change IWDG peripheral state */
phungductung 0:e87aa4c49e95 348 hiwdg->State = HAL_IWDG_STATE_BUSY;
phungductung 0:e87aa4c49e95 349
phungductung 0:e87aa4c49e95 350 tickstart = HAL_GetTick();
phungductung 0:e87aa4c49e95 351
phungductung 0:e87aa4c49e95 352 /* Wait until RVU flag is RESET */
phungductung 0:e87aa4c49e95 353 while(__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_RVU) != RESET)
phungductung 0:e87aa4c49e95 354 {
phungductung 0:e87aa4c49e95 355 if((HAL_GetTick() - tickstart ) > HAL_IWDG_DEFAULT_TIMEOUT)
phungductung 0:e87aa4c49e95 356 {
phungductung 0:e87aa4c49e95 357 /* Set IWDG state */
phungductung 0:e87aa4c49e95 358 hiwdg->State = HAL_IWDG_STATE_TIMEOUT;
phungductung 0:e87aa4c49e95 359
phungductung 0:e87aa4c49e95 360 /* Process unlocked */
phungductung 0:e87aa4c49e95 361 __HAL_UNLOCK(hiwdg);
phungductung 0:e87aa4c49e95 362
phungductung 0:e87aa4c49e95 363 return HAL_TIMEOUT;
phungductung 0:e87aa4c49e95 364 }
phungductung 0:e87aa4c49e95 365 }
phungductung 0:e87aa4c49e95 366
phungductung 0:e87aa4c49e95 367 /* Reload IWDG counter with value defined in the reload register */
phungductung 0:e87aa4c49e95 368 __HAL_IWDG_RELOAD_COUNTER(hiwdg);
phungductung 0:e87aa4c49e95 369
phungductung 0:e87aa4c49e95 370 /* Change IWDG peripheral state */
phungductung 0:e87aa4c49e95 371 hiwdg->State = HAL_IWDG_STATE_READY;
phungductung 0:e87aa4c49e95 372
phungductung 0:e87aa4c49e95 373 /* Process Unlocked */
phungductung 0:e87aa4c49e95 374 __HAL_UNLOCK(hiwdg);
phungductung 0:e87aa4c49e95 375
phungductung 0:e87aa4c49e95 376 /* Return function status */
phungductung 0:e87aa4c49e95 377 return HAL_OK;
phungductung 0:e87aa4c49e95 378 }
phungductung 0:e87aa4c49e95 379
phungductung 0:e87aa4c49e95 380 /**
phungductung 0:e87aa4c49e95 381 * @}
phungductung 0:e87aa4c49e95 382 */
phungductung 0:e87aa4c49e95 383
phungductung 0:e87aa4c49e95 384 /** @defgroup IWDG_Exported_Functions_Group3 Peripheral State functions
phungductung 0:e87aa4c49e95 385 * @brief Peripheral State functions.
phungductung 0:e87aa4c49e95 386 *
phungductung 0:e87aa4c49e95 387 @verbatim
phungductung 0:e87aa4c49e95 388 ===============================================================================
phungductung 0:e87aa4c49e95 389 ##### Peripheral State functions #####
phungductung 0:e87aa4c49e95 390 ===============================================================================
phungductung 0:e87aa4c49e95 391 [..]
phungductung 0:e87aa4c49e95 392 This subsection permits to get in run-time the status of the peripheral.
phungductung 0:e87aa4c49e95 393
phungductung 0:e87aa4c49e95 394 @endverbatim
phungductung 0:e87aa4c49e95 395 * @{
phungductung 0:e87aa4c49e95 396 */
phungductung 0:e87aa4c49e95 397
phungductung 0:e87aa4c49e95 398 /**
phungductung 0:e87aa4c49e95 399 * @brief Returns the IWDG state.
phungductung 0:e87aa4c49e95 400 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
phungductung 0:e87aa4c49e95 401 * the configuration information for the specified IWDG module.
phungductung 0:e87aa4c49e95 402 * @retval HAL state
phungductung 0:e87aa4c49e95 403 */
phungductung 0:e87aa4c49e95 404 HAL_IWDG_StateTypeDef HAL_IWDG_GetState(IWDG_HandleTypeDef *hiwdg)
phungductung 0:e87aa4c49e95 405 {
phungductung 0:e87aa4c49e95 406 return hiwdg->State;
phungductung 0:e87aa4c49e95 407 }
phungductung 0:e87aa4c49e95 408
phungductung 0:e87aa4c49e95 409 /**
phungductung 0:e87aa4c49e95 410 * @}
phungductung 0:e87aa4c49e95 411 */
phungductung 0:e87aa4c49e95 412
phungductung 0:e87aa4c49e95 413 /**
phungductung 0:e87aa4c49e95 414 * @}
phungductung 0:e87aa4c49e95 415 */
phungductung 0:e87aa4c49e95 416
phungductung 0:e87aa4c49e95 417 #endif /* HAL_IWDG_MODULE_ENABLED */
phungductung 0:e87aa4c49e95 418 /**
phungductung 0:e87aa4c49e95 419 * @}
phungductung 0:e87aa4c49e95 420 */
phungductung 0:e87aa4c49e95 421
phungductung 0:e87aa4c49e95 422 /**
phungductung 0:e87aa4c49e95 423 * @}
phungductung 0:e87aa4c49e95 424 */
phungductung 0:e87aa4c49e95 425
phungductung 0:e87aa4c49e95 426 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/