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Last commit 20 Feb 2019 by mbed official

targets/cmsis/TARGET_STM/TARGET_STM32L0/stm32l0xx_hal_iwdg.c@579:53297373a894, 2015-07-01 (annotated)

Committer:
mbed_official
Date:
Wed Jul 01 09:45:11 2015 +0100
Revision:
579:53297373a894
Parent:
489:119543c9f674 
Synchronized with git revision d5b4d2ab9c47edb4dc5776e7177b0c2263459081



Full URL: https://github.com/mbedmicro/mbed/commit/d5b4d2ab9c47edb4dc5776e7177b0c2263459081/



Initial version of drivers for SAMR21

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 489:119543c9f674 5 * @version V1.2.0
mbed_official 489:119543c9f674 6 * @date 06-February-2015
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 489:119543c9f674 79 (+) 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 489:119543c9f674 87 * <h2><center>&copy; COPYRIGHT(c) 2015 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 489:119543c9f674 121 /** @addtogroup 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 489:119543c9f674 128 /* TimeOut value */
mbed_official 489:119543c9f674 129 #define HAL_IWDG_DEFAULT_TIMEOUT (uint32_t)1000
mbed_official 376:cb4d9db17537 130
mbed_official 489:119543c9f674 131 /* Local define used to check the SR status register */
mbed_official 489:119543c9f674 132 #define IWDG_SR_FLAGS (IWDG_FLAG_PVU | IWDG_FLAG_RVU | IWDG_FLAG_WVU)
mbed_official 489:119543c9f674 133
mbed_official 489:119543c9f674 134 /** @addtogroup IWDG_Exported_Functions
mbed_official 376:cb4d9db17537 135 * @{
mbed_official 376:cb4d9db17537 136 */
mbed_official 376:cb4d9db17537 137
mbed_official 489:119543c9f674 138 /** @addtogroup IWDG_Exported_Functions_Group1
mbed_official 376:cb4d9db17537 139 * @brief Initialization and Configuration functions.
mbed_official 376:cb4d9db17537 140 *
mbed_official 376:cb4d9db17537 141 @verbatim
mbed_official 376:cb4d9db17537 142 ===============================================================================
mbed_official 376:cb4d9db17537 143 ##### Initialization and de-initialization functions #####
mbed_official 376:cb4d9db17537 144 ===============================================================================
mbed_official 376:cb4d9db17537 145 [..] This section provides functions allowing to:
mbed_official 376:cb4d9db17537 146 (+) Initialize the IWDG according to the specified parameters
mbed_official 376:cb4d9db17537 147 in the IWDG_InitTypeDef and create the associated handle
mbed_official 376:cb4d9db17537 148 (+) Manage Window option
mbed_official 376:cb4d9db17537 149 (+) Initialize the IWDG MSP
mbed_official 376:cb4d9db17537 150
mbed_official 376:cb4d9db17537 151 @endverbatim
mbed_official 376:cb4d9db17537 152 * @{
mbed_official 376:cb4d9db17537 153 */
mbed_official 376:cb4d9db17537 154
mbed_official 376:cb4d9db17537 155 /**
mbed_official 376:cb4d9db17537 156 * @brief Initializes the IWDG according to the specified
mbed_official 376:cb4d9db17537 157 * parameters in the IWDG_InitTypeDef and creates the associated handle.
mbed_official 489:119543c9f674 158 *
mbed_official 489:119543c9f674 159 * When using the 'window option', the function HAL_IWDG_Start() must
mbed_official 489:119543c9f674 160 * be called before calling this function
mbed_official 489:119543c9f674 161 *
mbed_official 489:119543c9f674 162 * @param hiwdg : pointer to a IWDG_HandleTypeDef structure that contains
mbed_official 489:119543c9f674 163 * the configuration information for the specified IWDG module.
mbed_official 376:cb4d9db17537 164 * @retval HAL status
mbed_official 376:cb4d9db17537 165 */
mbed_official 489:119543c9f674 166
mbed_official 376:cb4d9db17537 167 HAL_StatusTypeDef HAL_IWDG_Init(IWDG_HandleTypeDef *hiwdg)
mbed_official 376:cb4d9db17537 168 {
mbed_official 376:cb4d9db17537 169 uint32_t tickstart = 0;
mbed_official 376:cb4d9db17537 170
mbed_official 376:cb4d9db17537 171 /* Check the IWDG handle allocation */
mbed_official 489:119543c9f674 172 if(hiwdg == NULL)
mbed_official 376:cb4d9db17537 173 {
mbed_official 376:cb4d9db17537 174 return HAL_ERROR;
mbed_official 376:cb4d9db17537 175 }
mbed_official 376:cb4d9db17537 176
mbed_official 376:cb4d9db17537 177 /* Check the parameters */
mbed_official 376:cb4d9db17537 178 assert_param(IS_IWDG_PRESCALER(hiwdg->Init.Prescaler));
mbed_official 376:cb4d9db17537 179 assert_param(IS_IWDG_RELOAD(hiwdg->Init.Reload));
mbed_official 376:cb4d9db17537 180 assert_param(IS_IWDG_WINDOW(hiwdg->Init.Window));
mbed_official 376:cb4d9db17537 181
mbed_official 376:cb4d9db17537 182 /* Check pending flag, if previous update not done, return error */
mbed_official 489:119543c9f674 183 if(((hiwdg->Instance->SR) & IWDG_SR_FLAGS) != 0)
mbed_official 376:cb4d9db17537 184 {
mbed_official 376:cb4d9db17537 185 return HAL_ERROR;
mbed_official 376:cb4d9db17537 186 }
mbed_official 376:cb4d9db17537 187
mbed_official 376:cb4d9db17537 188 if(hiwdg->State == HAL_IWDG_STATE_RESET)
mbed_official 376:cb4d9db17537 189 {
mbed_official 489:119543c9f674 190 /* Init the low level hardware */
mbed_official 489:119543c9f674 191 HAL_IWDG_MspInit(hiwdg);
mbed_official 376:cb4d9db17537 192 }
mbed_official 376:cb4d9db17537 193
mbed_official 376:cb4d9db17537 194 /* Change IWDG peripheral state */
mbed_official 376:cb4d9db17537 195 hiwdg->State = HAL_IWDG_STATE_BUSY;
mbed_official 376:cb4d9db17537 196
mbed_official 376:cb4d9db17537 197 /* Enable write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers */
mbed_official 376:cb4d9db17537 198 /* by writing 0x5555 in KR */
mbed_official 489:119543c9f674 199 IWDG_ENABLE_WRITE_ACCESS(hiwdg);
mbed_official 376:cb4d9db17537 200
mbed_official 376:cb4d9db17537 201 /* Write to IWDG registers the IWDG_Prescaler & IWDG_Reload values to work with */
mbed_official 376:cb4d9db17537 202 MODIFY_REG(hiwdg->Instance->PR, (uint32_t)IWDG_PR_PR, hiwdg->Init.Prescaler);
mbed_official 376:cb4d9db17537 203 MODIFY_REG(hiwdg->Instance->RLR, (uint32_t)IWDG_RLR_RL, hiwdg->Init.Reload);
mbed_official 376:cb4d9db17537 204
mbed_official 376:cb4d9db17537 205 /* check if window option is enabled */
mbed_official 376:cb4d9db17537 206 if (((hiwdg->Init.Window) != IWDG_WINDOW_DISABLE) || ((hiwdg->Instance->WINR) != IWDG_WINDOW_DISABLE))
mbed_official 376:cb4d9db17537 207 {
mbed_official 376:cb4d9db17537 208 tickstart = HAL_GetTick();
mbed_official 376:cb4d9db17537 209
mbed_official 376:cb4d9db17537 210 /* Wait for register to be updated */
mbed_official 489:119543c9f674 211 while (((hiwdg->Instance->SR) & IWDG_SR_FLAGS) != 0)
mbed_official 489:119543c9f674 212 {
mbed_official 489:119543c9f674 213 if((HAL_GetTick()-tickstart) > HAL_IWDG_DEFAULT_TIMEOUT)
mbed_official 489:119543c9f674 214 {
mbed_official 489:119543c9f674 215 /* Set IWDG state */
mbed_official 489:119543c9f674 216 hiwdg->State = HAL_IWDG_STATE_TIMEOUT;
mbed_official 489:119543c9f674 217 return HAL_TIMEOUT;
mbed_official 489:119543c9f674 218 }
mbed_official 376:cb4d9db17537 219 }
mbed_official 376:cb4d9db17537 220
mbed_official 376:cb4d9db17537 221 /* Write to IWDG WINR the IWDG_Window value to compare with */
mbed_official 376:cb4d9db17537 222 MODIFY_REG(hiwdg->Instance->WINR, (uint32_t)IWDG_WINR_WIN, hiwdg->Init.Window);
mbed_official 376:cb4d9db17537 223
mbed_official 376:cb4d9db17537 224 }
mbed_official 376:cb4d9db17537 225 /* Change IWDG peripheral state */
mbed_official 376:cb4d9db17537 226 hiwdg->State = HAL_IWDG_STATE_READY;
mbed_official 376:cb4d9db17537 227
mbed_official 376:cb4d9db17537 228 /* Return function status */
mbed_official 376:cb4d9db17537 229 return HAL_OK;
mbed_official 376:cb4d9db17537 230 }
mbed_official 376:cb4d9db17537 231
mbed_official 376:cb4d9db17537 232 /**
mbed_official 376:cb4d9db17537 233 * @brief Initializes the IWDG MSP.
mbed_official 376:cb4d9db17537 234 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
mbed_official 376:cb4d9db17537 235 * the configuration information for the specified IWDG module.
mbed_official 376:cb4d9db17537 236 * @retval None
mbed_official 376:cb4d9db17537 237 */
mbed_official 376:cb4d9db17537 238 __weak void HAL_IWDG_MspInit(IWDG_HandleTypeDef *hiwdg)
mbed_official 376:cb4d9db17537 239 {
mbed_official 376:cb4d9db17537 240 /* NOTE : This function Should not be modified, when the callback is needed,
mbed_official 376:cb4d9db17537 241 the HAL_IWDG_MspInit could be implemented in the user file
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 */
mbed_official 376:cb4d9db17537 248
mbed_official 489:119543c9f674 249 /** @addtogroup IWDG_Exported_Functions_Group2
mbed_official 376:cb4d9db17537 250 * @brief IO operation functions
mbed_official 376:cb4d9db17537 251 *
mbed_official 376:cb4d9db17537 252 @verbatim
mbed_official 376:cb4d9db17537 253 ===============================================================================
mbed_official 376:cb4d9db17537 254 ##### IO operation functions #####
mbed_official 376:cb4d9db17537 255 ===============================================================================
mbed_official 376:cb4d9db17537 256 [..] This section provides functions allowing to:
mbed_official 376:cb4d9db17537 257 (+) Start the IWDG.
mbed_official 376:cb4d9db17537 258 (+) Refresh the IWDG.
mbed_official 376:cb4d9db17537 259
mbed_official 376:cb4d9db17537 260 @endverbatim
mbed_official 376:cb4d9db17537 261 * @{
mbed_official 376:cb4d9db17537 262 */
mbed_official 376:cb4d9db17537 263
mbed_official 376:cb4d9db17537 264 /**
mbed_official 376:cb4d9db17537 265 * @brief Starts the IWDG.
mbed_official 489:119543c9f674 266 * @param hiwdg : pointer to a IWDG_HandleTypeDef structure that contains
mbed_official 489:119543c9f674 267 * the configuration information for the specified IWDG module.
mbed_official 376:cb4d9db17537 268 * @retval HAL status
mbed_official 376:cb4d9db17537 269 */
mbed_official 376:cb4d9db17537 270 HAL_StatusTypeDef HAL_IWDG_Start(IWDG_HandleTypeDef *hiwdg)
mbed_official 376:cb4d9db17537 271 {
mbed_official 376:cb4d9db17537 272 uint32_t tickstart = 0;
mbed_official 376:cb4d9db17537 273
mbed_official 376:cb4d9db17537 274 /* Process locked */
mbed_official 376:cb4d9db17537 275 __HAL_LOCK(hiwdg);
mbed_official 376:cb4d9db17537 276
mbed_official 376:cb4d9db17537 277 /* Change IWDG peripheral state */
mbed_official 376:cb4d9db17537 278 hiwdg->State = HAL_IWDG_STATE_BUSY;
mbed_official 376:cb4d9db17537 279
mbed_official 489:119543c9f674 280 /* Enable the IWDG peripheral */
mbed_official 489:119543c9f674 281 __HAL_IWDG_START(hiwdg);
mbed_official 489:119543c9f674 282
mbed_official 376:cb4d9db17537 283 /* Reload IWDG counter with value defined in the RLR register */
mbed_official 376:cb4d9db17537 284 if ((hiwdg->Init.Window) == IWDG_WINDOW_DISABLE)
mbed_official 376:cb4d9db17537 285 {
mbed_official 376:cb4d9db17537 286 __HAL_IWDG_RELOAD_COUNTER(hiwdg);
mbed_official 376:cb4d9db17537 287 }
mbed_official 376:cb4d9db17537 288
mbed_official 376:cb4d9db17537 289 tickstart = HAL_GetTick();
mbed_official 489:119543c9f674 290
mbed_official 489:119543c9f674 291 /* Wait until PVU, RVU, WVU flag are RESET */
mbed_official 489:119543c9f674 292 while (((hiwdg->Instance->SR) & IWDG_SR_FLAGS) != 0)
mbed_official 376:cb4d9db17537 293 {
mbed_official 489:119543c9f674 294 if((HAL_GetTick()-tickstart) > HAL_IWDG_DEFAULT_TIMEOUT)
mbed_official 489:119543c9f674 295 {
mbed_official 376:cb4d9db17537 296 /* Set IWDG state */
mbed_official 376:cb4d9db17537 297 hiwdg->State = HAL_IWDG_STATE_TIMEOUT;
mbed_official 376:cb4d9db17537 298
mbed_official 376:cb4d9db17537 299 /* Process unlocked */
mbed_official 376:cb4d9db17537 300 __HAL_UNLOCK(hiwdg);
mbed_official 376:cb4d9db17537 301 return HAL_TIMEOUT;
mbed_official 376:cb4d9db17537 302 }
mbed_official 376:cb4d9db17537 303 }
mbed_official 489:119543c9f674 304
mbed_official 376:cb4d9db17537 305 /* Change IWDG peripheral state */
mbed_official 376:cb4d9db17537 306 hiwdg->State = HAL_IWDG_STATE_READY;
mbed_official 376:cb4d9db17537 307
mbed_official 376:cb4d9db17537 308 /* Process Unlocked */
mbed_official 376:cb4d9db17537 309 __HAL_UNLOCK(hiwdg);
mbed_official 376:cb4d9db17537 310
mbed_official 376:cb4d9db17537 311 /* Return function status */
mbed_official 376:cb4d9db17537 312 return HAL_OK;
mbed_official 376:cb4d9db17537 313 }
mbed_official 376:cb4d9db17537 314
mbed_official 376:cb4d9db17537 315 /**
mbed_official 376:cb4d9db17537 316 * @brief Refreshes the IWDG.
mbed_official 489:119543c9f674 317 * @param hiwdg : pointer to a IWDG_HandleTypeDef structure that contains
mbed_official 489:119543c9f674 318 * the configuration information for the specified IWDG module.
mbed_official 376:cb4d9db17537 319 * @retval HAL status
mbed_official 376:cb4d9db17537 320 */
mbed_official 376:cb4d9db17537 321 HAL_StatusTypeDef HAL_IWDG_Refresh(IWDG_HandleTypeDef *hiwdg)
mbed_official 376:cb4d9db17537 322 {
mbed_official 376:cb4d9db17537 323 uint32_t tickstart = 0;
mbed_official 376:cb4d9db17537 324
mbed_official 376:cb4d9db17537 325 /* Process Locked */
mbed_official 376:cb4d9db17537 326 __HAL_LOCK(hiwdg);
mbed_official 376:cb4d9db17537 327
mbed_official 376:cb4d9db17537 328 /* Change IWDG peripheral state */
mbed_official 376:cb4d9db17537 329 hiwdg->State = HAL_IWDG_STATE_BUSY;
mbed_official 376:cb4d9db17537 330
mbed_official 376:cb4d9db17537 331 tickstart = HAL_GetTick();
mbed_official 376:cb4d9db17537 332
mbed_official 376:cb4d9db17537 333 /* Wait until RVU flag is RESET */
mbed_official 376:cb4d9db17537 334 while(__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_RVU) != RESET)
mbed_official 376:cb4d9db17537 335 {
mbed_official 489:119543c9f674 336 if((HAL_GetTick()-tickstart) > HAL_IWDG_DEFAULT_TIMEOUT)
mbed_official 489:119543c9f674 337 {
mbed_official 376:cb4d9db17537 338 /* Set IWDG state */
mbed_official 376:cb4d9db17537 339 hiwdg->State = HAL_IWDG_STATE_TIMEOUT;
mbed_official 376:cb4d9db17537 340
mbed_official 376:cb4d9db17537 341 /* Process unlocked */
mbed_official 376:cb4d9db17537 342 __HAL_UNLOCK(hiwdg);
mbed_official 376:cb4d9db17537 343
mbed_official 376:cb4d9db17537 344 return HAL_TIMEOUT;
mbed_official 376:cb4d9db17537 345 }
mbed_official 376:cb4d9db17537 346 }
mbed_official 376:cb4d9db17537 347
mbed_official 376:cb4d9db17537 348 /* Reload IWDG counter with value defined in the reload register */
mbed_official 376:cb4d9db17537 349 __HAL_IWDG_RELOAD_COUNTER(hiwdg);
mbed_official 376:cb4d9db17537 350
mbed_official 376:cb4d9db17537 351 /* Change IWDG peripheral state */
mbed_official 376:cb4d9db17537 352 hiwdg->State = HAL_IWDG_STATE_READY;
mbed_official 376:cb4d9db17537 353
mbed_official 376:cb4d9db17537 354 /* Process Unlocked */
mbed_official 376:cb4d9db17537 355 __HAL_UNLOCK(hiwdg);
mbed_official 376:cb4d9db17537 356
mbed_official 376:cb4d9db17537 357 /* Return function status */
mbed_official 376:cb4d9db17537 358 return HAL_OK;
mbed_official 376:cb4d9db17537 359 }
mbed_official 376:cb4d9db17537 360
mbed_official 376:cb4d9db17537 361 /**
mbed_official 376:cb4d9db17537 362 * @}
mbed_official 376:cb4d9db17537 363 */
mbed_official 376:cb4d9db17537 364
mbed_official 489:119543c9f674 365 /** @addtogroup IWDG_Exported_Functions_Group3
mbed_official 376:cb4d9db17537 366 * @brief Peripheral State functions.
mbed_official 376:cb4d9db17537 367 *
mbed_official 376:cb4d9db17537 368 @verbatim
mbed_official 376:cb4d9db17537 369 ===============================================================================
mbed_official 376:cb4d9db17537 370 ##### Peripheral State functions #####
mbed_official 376:cb4d9db17537 371 ===============================================================================
mbed_official 376:cb4d9db17537 372 [..]
mbed_official 376:cb4d9db17537 373 This subsection permits to get in run-time the status of the peripheral
mbed_official 376:cb4d9db17537 374 and the data flow.
mbed_official 376:cb4d9db17537 375
mbed_official 376:cb4d9db17537 376 @endverbatim
mbed_official 376:cb4d9db17537 377 * @{
mbed_official 376:cb4d9db17537 378 */
mbed_official 376:cb4d9db17537 379
mbed_official 376:cb4d9db17537 380 /**
mbed_official 376:cb4d9db17537 381 * @brief Returns the IWDG state.
mbed_official 489:119543c9f674 382 * @param hiwdg : pointer to a IWDG_HandleTypeDef structure that contains
mbed_official 489:119543c9f674 383 * the configuration information for the specified IWDG module.
mbed_official 376:cb4d9db17537 384 * @retval HAL state
mbed_official 376:cb4d9db17537 385 */
mbed_official 376:cb4d9db17537 386 HAL_IWDG_StateTypeDef HAL_IWDG_GetState(IWDG_HandleTypeDef *hiwdg)
mbed_official 376:cb4d9db17537 387 {
mbed_official 376:cb4d9db17537 388 return hiwdg->State;
mbed_official 376:cb4d9db17537 389 }
mbed_official 376:cb4d9db17537 390
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 #endif /* HAL_IWDG_MODULE_ENABLED */
mbed_official 376:cb4d9db17537 400 /**
mbed_official 376:cb4d9db17537 401 * @}
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 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
mbed_official 489:119543c9f674 409