mbed official / mbed-src

mbed library sources

Dependents:   Encrypted my_mbed lklk CyaSSL_DTLS_Cellular ... more

Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

Import librarymbed

The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/cmsis/TARGET_STM/TARGET_STM32L0/stm32l0xx_hal_iwdg.c@382:ee426a420dbb, 2014-11-03 (annotated)

Committer:
mbed_official
Date:
Mon Nov 03 10:45:07 2014 +0000
Revision:
382:ee426a420dbb
Parent:
targets/cmsis/TARGET_STM/TARGET_DISCO_L053C8/stm32l0xx_hal_iwdg.c@376:cb4d9db17537
Child:
387:643a59b3dbac
Synchronized with git revision d54467eb07f62efd9ccdf44f1ede7fe1c1b0cf83



Full URL: https://github.com/mbedmicro/mbed/commit/d54467eb07f62efd9ccdf44f1ede7fe1c1b0cf83/

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 376:cb4d9db17537 168 if(hiwdg == 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****/