zain aftab / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/cmsis/TARGET_STM/TARGET_STM32F0/stm32f0xx_hal_iwdg.c@636:a11c0372f0ba, 2015-09-30 (annotated)

Committer:
mbed_official
Date:
Wed Sep 30 17:00:09 2015 +0100
Revision:
636:a11c0372f0ba
Parent:
631:825f75ca301e 
Synchronized with git revision d29c98dae61be0946ddf3a3c641c7726056f9452



Full URL: https://github.com/mbedmicro/mbed/commit/d29c98dae61be0946ddf3a3c641c7726056f9452/



Added support for SAMW25

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 340:28d1f895c6fe 1 /**
mbed_official 340:28d1f895c6fe 2 ******************************************************************************
mbed_official 340:28d1f895c6fe 3 * @file stm32f0xx_hal_iwdg.c
mbed_official 340:28d1f895c6fe 4 * @author MCD Application Team
mbed_official 631:825f75ca301e 5 * @version V1.3.0
mbed_official 631:825f75ca301e 6 * @date 26-June-2015
mbed_official 340:28d1f895c6fe 7 * @brief IWDG HAL module driver.
mbed_official 340:28d1f895c6fe 8 * This file provides firmware functions to manage the following
mbed_official 442:d2c15dda23c1 9 * functionalities of the Independent Watchdog (IWDG) peripheral:
mbed_official 340:28d1f895c6fe 10 * + Initialization and Configuration functions
mbed_official 340:28d1f895c6fe 11 * + IO operation functions
mbed_official 340:28d1f895c6fe 12 * + Peripheral State functions
mbed_official 340:28d1f895c6fe 13 *
mbed_official 340:28d1f895c6fe 14 @verbatim
mbed_official 340:28d1f895c6fe 15 ===============================================================================
mbed_official 340:28d1f895c6fe 16 ##### IWDG Specific features #####
mbed_official 340:28d1f895c6fe 17 ===============================================================================
mbed_official 340:28d1f895c6fe 18 [..]
mbed_official 340:28d1f895c6fe 19 (+) The IWDG can be started by either software or hardware (configurable
mbed_official 340:28d1f895c6fe 20 through option byte).
mbed_official 340:28d1f895c6fe 21 (+) The IWDG is clocked by its own dedicated Low-Speed clock (LSI) and
mbed_official 340:28d1f895c6fe 22 thus stays active even if the main clock fails.
mbed_official 340:28d1f895c6fe 23 (+) Once the IWDG is started, the LSI is forced ON and cannot be disabled
mbed_official 340:28d1f895c6fe 24 (LSI cannot be disabled too), and the counter starts counting down from
mbed_official 340:28d1f895c6fe 25 the reset value of 0xFFF. When it reaches the end of count value (0x000)
mbed_official 340:28d1f895c6fe 26 a system reset is generated.
mbed_official 340:28d1f895c6fe 27 (+) The IWDG counter should be refreshed at regular intervals, otherwise the
mbed_official 340:28d1f895c6fe 28 watchdog generates an MCU reset when the counter reaches 0.
mbed_official 340:28d1f895c6fe 29 (+) The IWDG is implemented in the VDD voltage domain that is still functional
mbed_official 340:28d1f895c6fe 30 in STOP and STANDBY mode (IWDG reset can wake-up from STANDBY).
mbed_official 340:28d1f895c6fe 31 (+) IWDGRST flag in RCC_CSR register can be used to inform when an IWDG
mbed_official 340:28d1f895c6fe 32 reset occurs.
mbed_official 340:28d1f895c6fe 33 (+) Min-max timeout value @41KHz (LSI): ~0.1ms / ~25.5s
mbed_official 340:28d1f895c6fe 34 The IWDG timeout may vary due to LSI frequency dispersion. STM32F0x
mbed_official 340:28d1f895c6fe 35 devices provide the capability to measure the LSI frequency (LSI clock
mbed_official 340:28d1f895c6fe 36 connected internally to TIM16 CH1 input capture). The measured value
mbed_official 340:28d1f895c6fe 37 can be used to have an IWDG timeout with an acceptable accuracy.
mbed_official 340:28d1f895c6fe 38 For more information, please refer to the STM32F0x Reference manual.
mbed_official 340:28d1f895c6fe 39
mbed_official 340:28d1f895c6fe 40 ##### How to use this driver #####
mbed_official 340:28d1f895c6fe 41 ===============================================================================
mbed_official 340:28d1f895c6fe 42 [..]
mbed_official 340:28d1f895c6fe 43 (#) if Window option is disabled
mbed_official 340:28d1f895c6fe 44 (++) Use IWDG using HAL_IWDG_Init() function to :
mbed_official 340:28d1f895c6fe 45 (+++) Enable write access to IWDG_PR, IWDG_RLR.
mbed_official 340:28d1f895c6fe 46 (+++) Configure the IWDG prescaler, counter reload value.
mbed_official 340:28d1f895c6fe 47 This reload value will be loaded in the IWDG counter each time the counter
mbed_official 340:28d1f895c6fe 48 is reloaded, then the IWDG will start counting down from this value.
mbed_official 340:28d1f895c6fe 49 (++) Use IWDG using HAL_IWDG_Start() function to :
mbed_official 340:28d1f895c6fe 50 (+++) Reload IWDG counter with value defined in the IWDG_RLR register.
mbed_official 340:28d1f895c6fe 51 (+++) Start the IWDG, when the IWDG is used in software mode (no need
mbed_official 340:28d1f895c6fe 52 to enable the LSI, it will be enabled by hardware).
mbed_official 340:28d1f895c6fe 53 (++) Then the application program must refresh the IWDG counter at regular
mbed_official 340:28d1f895c6fe 54 intervals during normal operation to prevent an MCU reset, using
mbed_official 340:28d1f895c6fe 55 HAL_IWDG_Refresh() function.
mbed_official 340:28d1f895c6fe 56 (#) if Window option is enabled:
mbed_official 340:28d1f895c6fe 57 (++) Use IWDG using HAL_IWDG_Start() function to enable IWDG downcounter
mbed_official 340:28d1f895c6fe 58 (++) Use IWDG using HAL_IWDG_Init() function to :
mbed_official 340:28d1f895c6fe 59 (+++) Enable write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers.
mbed_official 340:28d1f895c6fe 60 (+++) Configure the IWDG prescaler, reload value and window value.
mbed_official 340:28d1f895c6fe 61 (++) Then the application program must refresh the IWDG counter at regular
mbed_official 340:28d1f895c6fe 62 intervals during normal operation to prevent an MCU reset, using
mbed_official 340:28d1f895c6fe 63 HAL_IWDG_Refresh() function.
mbed_official 340:28d1f895c6fe 64
mbed_official 340:28d1f895c6fe 65 *** IWDG HAL driver macros list ***
mbed_official 340:28d1f895c6fe 66 ====================================
mbed_official 340:28d1f895c6fe 67 [..]
mbed_official 340:28d1f895c6fe 68 Below the list of most used macros in IWDG HAL driver.
mbed_official 340:28d1f895c6fe 69
mbed_official 340:28d1f895c6fe 70 (+) __HAL_IWDG_START: Enable the IWDG peripheral
mbed_official 340:28d1f895c6fe 71 (+) __HAL_IWDG_RELOAD_COUNTER: Reloads IWDG counter with value defined in the reload register
mbed_official 631:825f75ca301e 72 (+) IWDG_ENABLE_WRITE_ACCESS : Enable write access to IWDG_PR and IWDG_RLR registers
mbed_official 631:825f75ca301e 73 (+) IWDG_DISABLE_WRITE_ACCESS : Disable write access to IWDG_PR and IWDG_RLR registers
mbed_official 340:28d1f895c6fe 74 (+) __HAL_IWDG_GET_FLAG: Get the selected IWDG's flag status
mbed_official 340:28d1f895c6fe 75
mbed_official 340:28d1f895c6fe 76 @endverbatim
mbed_official 340:28d1f895c6fe 77 ******************************************************************************
mbed_official 340:28d1f895c6fe 78 * @attention
mbed_official 340:28d1f895c6fe 79 *
mbed_official 631:825f75ca301e 80 * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
mbed_official 340:28d1f895c6fe 81 *
mbed_official 340:28d1f895c6fe 82 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 340:28d1f895c6fe 83 * are permitted provided that the following conditions are met:
mbed_official 340:28d1f895c6fe 84 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 340:28d1f895c6fe 85 * this list of conditions and the following disclaimer.
mbed_official 340:28d1f895c6fe 86 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 340:28d1f895c6fe 87 * this list of conditions and the following disclaimer in the documentation
mbed_official 340:28d1f895c6fe 88 * and/or other materials provided with the distribution.
mbed_official 340:28d1f895c6fe 89 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 340:28d1f895c6fe 90 * may be used to endorse or promote products derived from this software
mbed_official 340:28d1f895c6fe 91 * without specific prior written permission.
mbed_official 340:28d1f895c6fe 92 *
mbed_official 340:28d1f895c6fe 93 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 340:28d1f895c6fe 94 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 340:28d1f895c6fe 95 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 340:28d1f895c6fe 96 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 340:28d1f895c6fe 97 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 340:28d1f895c6fe 98 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 340:28d1f895c6fe 99 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 340:28d1f895c6fe 100 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 340:28d1f895c6fe 101 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 340:28d1f895c6fe 102 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 340:28d1f895c6fe 103 *
mbed_official 631:825f75ca301e 104 ******************************************************************************
mbed_official 631:825f75ca301e 105 */
mbed_official 340:28d1f895c6fe 106
mbed_official 340:28d1f895c6fe 107 /* Includes ------------------------------------------------------------------*/
mbed_official 340:28d1f895c6fe 108 #include "stm32f0xx_hal.h"
mbed_official 340:28d1f895c6fe 109
mbed_official 340:28d1f895c6fe 110 /** @addtogroup STM32F0xx_HAL_Driver
mbed_official 340:28d1f895c6fe 111 * @{
mbed_official 340:28d1f895c6fe 112 */
mbed_official 340:28d1f895c6fe 113
mbed_official 631:825f75ca301e 114 /** @defgroup IWDG IWDG
mbed_official 340:28d1f895c6fe 115 * @brief IWDG HAL module driver.
mbed_official 340:28d1f895c6fe 116 * @{
mbed_official 340:28d1f895c6fe 117 */
mbed_official 340:28d1f895c6fe 118
mbed_official 340:28d1f895c6fe 119 #ifdef HAL_IWDG_MODULE_ENABLED
mbed_official 340:28d1f895c6fe 120
mbed_official 340:28d1f895c6fe 121 /* Private typedef -----------------------------------------------------------*/
mbed_official 340:28d1f895c6fe 122 /* Private define ------------------------------------------------------------*/
mbed_official 340:28d1f895c6fe 123 /** @defgroup IWDG_Private_Defines IWDG Private Defines
mbed_official 340:28d1f895c6fe 124 * @{
mbed_official 340:28d1f895c6fe 125 */
mbed_official 340:28d1f895c6fe 126
mbed_official 340:28d1f895c6fe 127 #define HAL_IWDG_DEFAULT_TIMEOUT (uint32_t)1000
mbed_official 340:28d1f895c6fe 128
mbed_official 340:28d1f895c6fe 129 /**
mbed_official 340:28d1f895c6fe 130 * @}
mbed_official 340:28d1f895c6fe 131 */
mbed_official 340:28d1f895c6fe 132 /* Private macro -------------------------------------------------------------*/
mbed_official 340:28d1f895c6fe 133 /* Private variables ---------------------------------------------------------*/
mbed_official 340:28d1f895c6fe 134 /* Private function prototypes -----------------------------------------------*/
mbed_official 631:825f75ca301e 135 /* Exported functions --------------------------------------------------------*/
mbed_official 340:28d1f895c6fe 136
mbed_official 340:28d1f895c6fe 137 /** @defgroup IWDG_Exported_Functions IWDG Exported Functions
mbed_official 340:28d1f895c6fe 138 * @{
mbed_official 340:28d1f895c6fe 139 */
mbed_official 340:28d1f895c6fe 140
mbed_official 340:28d1f895c6fe 141 /** @defgroup IWDG_Exported_Functions_Group1 Initialization and de-initialization functions
mbed_official 631:825f75ca301e 142 * @brief Initialization and Configuration functions.
mbed_official 340:28d1f895c6fe 143 *
mbed_official 631:825f75ca301e 144 @verbatim
mbed_official 340:28d1f895c6fe 145 ===============================================================================
mbed_official 631:825f75ca301e 146 ##### Initialization and de-initialization functions #####
mbed_official 340:28d1f895c6fe 147 ===============================================================================
mbed_official 340:28d1f895c6fe 148 [..] This section provides functions allowing to:
mbed_official 631:825f75ca301e 149 (+) Initialize the IWDG according to the specified parameters
mbed_official 340:28d1f895c6fe 150 in the IWDG_InitTypeDef and create the associated handle
mbed_official 340:28d1f895c6fe 151 (+) Manage Window option
mbed_official 340:28d1f895c6fe 152 (+) Initialize the IWDG MSP
mbed_official 631:825f75ca301e 153 (+) DeInitialize the IWDG MSP
mbed_official 631:825f75ca301e 154
mbed_official 340:28d1f895c6fe 155 @endverbatim
mbed_official 340:28d1f895c6fe 156 * @{
mbed_official 340:28d1f895c6fe 157 */
mbed_official 340:28d1f895c6fe 158
mbed_official 340:28d1f895c6fe 159 /**
mbed_official 631:825f75ca301e 160 * @brief Initialize the IWDG according to the specified
mbed_official 631:825f75ca301e 161 * parameters in the IWDG_InitTypeDef and initialize the associated handle.
mbed_official 340:28d1f895c6fe 162 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
mbed_official 340:28d1f895c6fe 163 * the configuration information for the specified IWDG module.
mbed_official 340:28d1f895c6fe 164 * @retval HAL status
mbed_official 340:28d1f895c6fe 165 */
mbed_official 340:28d1f895c6fe 166 HAL_StatusTypeDef HAL_IWDG_Init(IWDG_HandleTypeDef *hiwdg)
mbed_official 631:825f75ca301e 167 {
mbed_official 340:28d1f895c6fe 168 uint32_t tickstart = 0;
mbed_official 340:28d1f895c6fe 169
mbed_official 340:28d1f895c6fe 170 /* Check the IWDG handle allocation */
mbed_official 442:d2c15dda23c1 171 if(hiwdg == NULL)
mbed_official 340:28d1f895c6fe 172 {
mbed_official 340:28d1f895c6fe 173 return HAL_ERROR;
mbed_official 340:28d1f895c6fe 174 }
mbed_official 631:825f75ca301e 175
mbed_official 340:28d1f895c6fe 176 /* Check the parameters */
mbed_official 340:28d1f895c6fe 177 assert_param(IS_IWDG_ALL_INSTANCE(hiwdg->Instance));
mbed_official 340:28d1f895c6fe 178 assert_param(IS_IWDG_PRESCALER(hiwdg->Init.Prescaler));
mbed_official 340:28d1f895c6fe 179 assert_param(IS_IWDG_RELOAD(hiwdg->Init.Reload));
mbed_official 340:28d1f895c6fe 180 assert_param(IS_IWDG_WINDOW(hiwdg->Init.Window));
mbed_official 340:28d1f895c6fe 181
mbed_official 340:28d1f895c6fe 182 /* Check pending flag, if previous update not done, return error */
mbed_official 340:28d1f895c6fe 183 if((__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_PVU) != RESET)
mbed_official 340:28d1f895c6fe 184 &&(__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_RVU) != RESET)
mbed_official 340:28d1f895c6fe 185 &&(__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_WVU) != RESET))
mbed_official 340:28d1f895c6fe 186 {
mbed_official 340:28d1f895c6fe 187 return HAL_ERROR;
mbed_official 340:28d1f895c6fe 188 }
mbed_official 631:825f75ca301e 189
mbed_official 340:28d1f895c6fe 190 if(hiwdg->State == HAL_IWDG_STATE_RESET)
mbed_official 631:825f75ca301e 191 {
mbed_official 631:825f75ca301e 192 /* Allocate lock resource and initialize it */
mbed_official 631:825f75ca301e 193 hiwdg->Lock = HAL_UNLOCKED;
mbed_official 631:825f75ca301e 194
mbed_official 631:825f75ca301e 195 /* Init the low level hardware */
mbed_official 631:825f75ca301e 196 HAL_IWDG_MspInit(hiwdg);
mbed_official 340:28d1f895c6fe 197 }
mbed_official 340:28d1f895c6fe 198
mbed_official 340:28d1f895c6fe 199 /* Change IWDG peripheral state */
mbed_official 340:28d1f895c6fe 200 hiwdg->State = HAL_IWDG_STATE_BUSY;
mbed_official 340:28d1f895c6fe 201
mbed_official 631:825f75ca301e 202 /* Enable write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers */
mbed_official 631:825f75ca301e 203 /* by writing 0x5555 in KR */
mbed_official 631:825f75ca301e 204 IWDG_ENABLE_WRITE_ACCESS(hiwdg);
mbed_official 631:825f75ca301e 205
mbed_official 340:28d1f895c6fe 206 /* Write to IWDG registers the IWDG_Prescaler & IWDG_Reload values to work with */
mbed_official 340:28d1f895c6fe 207 MODIFY_REG(hiwdg->Instance->PR, IWDG_PR_PR, hiwdg->Init.Prescaler);
mbed_official 340:28d1f895c6fe 208 MODIFY_REG(hiwdg->Instance->RLR, IWDG_RLR_RL, hiwdg->Init.Reload);
mbed_official 631:825f75ca301e 209
mbed_official 340:28d1f895c6fe 210 /* check if window option is enabled */
mbed_official 340:28d1f895c6fe 211 if (((hiwdg->Init.Window) != IWDG_WINDOW_DISABLE) || ((hiwdg->Instance->WINR) != IWDG_WINDOW_DISABLE))
mbed_official 340:28d1f895c6fe 212 {
mbed_official 340:28d1f895c6fe 213 tickstart = HAL_GetTick();
mbed_official 340:28d1f895c6fe 214
mbed_official 340:28d1f895c6fe 215 /* Wait for register to be updated */
mbed_official 340:28d1f895c6fe 216 while((uint32_t)(hiwdg->Instance->SR) != RESET)
mbed_official 340:28d1f895c6fe 217 {
mbed_official 631:825f75ca301e 218 if((HAL_GetTick() - tickstart ) > HAL_IWDG_DEFAULT_TIMEOUT)
mbed_official 631:825f75ca301e 219 {
mbed_official 340:28d1f895c6fe 220 /* Set IWDG state */
mbed_official 340:28d1f895c6fe 221 hiwdg->State = HAL_IWDG_STATE_TIMEOUT;
mbed_official 340:28d1f895c6fe 222 return HAL_TIMEOUT;
mbed_official 631:825f75ca301e 223 }
mbed_official 340:28d1f895c6fe 224 }
mbed_official 340:28d1f895c6fe 225
mbed_official 340:28d1f895c6fe 226 /* Write to IWDG WINR the IWDG_Window value to compare with */
mbed_official 340:28d1f895c6fe 227 MODIFY_REG(hiwdg->Instance->WINR, IWDG_WINR_WIN, hiwdg->Init.Window);
mbed_official 631:825f75ca301e 228 }
mbed_official 340:28d1f895c6fe 229
mbed_official 340:28d1f895c6fe 230 /* Change IWDG peripheral state */
mbed_official 340:28d1f895c6fe 231 hiwdg->State = HAL_IWDG_STATE_READY;
mbed_official 631:825f75ca301e 232
mbed_official 340:28d1f895c6fe 233 /* Return function status */
mbed_official 340:28d1f895c6fe 234 return HAL_OK;
mbed_official 340:28d1f895c6fe 235 }
mbed_official 340:28d1f895c6fe 236
mbed_official 340:28d1f895c6fe 237 /**
mbed_official 631:825f75ca301e 238 * @brief Initialize the IWDG MSP.
mbed_official 340:28d1f895c6fe 239 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
mbed_official 340:28d1f895c6fe 240 * the configuration information for the specified IWDG module.
mbed_official 340:28d1f895c6fe 241 * @retval None
mbed_official 340:28d1f895c6fe 242 */
mbed_official 340:28d1f895c6fe 243 __weak void HAL_IWDG_MspInit(IWDG_HandleTypeDef *hiwdg)
mbed_official 340:28d1f895c6fe 244 {
mbed_official 631:825f75ca301e 245 /* NOTE : This function should not be modified, when the callback is needed,
mbed_official 340:28d1f895c6fe 246 the HAL_IWDG_MspInit could be implemented in the user file
mbed_official 340:28d1f895c6fe 247 */
mbed_official 340:28d1f895c6fe 248 }
mbed_official 340:28d1f895c6fe 249
mbed_official 340:28d1f895c6fe 250 /**
mbed_official 340:28d1f895c6fe 251 * @}
mbed_official 340:28d1f895c6fe 252 */
mbed_official 340:28d1f895c6fe 253
mbed_official 340:28d1f895c6fe 254 /** @defgroup IWDG_Exported_Functions_Group2 IO operation functions
mbed_official 340:28d1f895c6fe 255 * @brief IO operation functions
mbed_official 340:28d1f895c6fe 256 *
mbed_official 631:825f75ca301e 257 @verbatim
mbed_official 340:28d1f895c6fe 258 ===============================================================================
mbed_official 340:28d1f895c6fe 259 ##### IO operation functions #####
mbed_official 631:825f75ca301e 260 ===============================================================================
mbed_official 340:28d1f895c6fe 261 [..] This section provides functions allowing to:
mbed_official 340:28d1f895c6fe 262 (+) Start the IWDG.
mbed_official 340:28d1f895c6fe 263 (+) Refresh the IWDG.
mbed_official 340:28d1f895c6fe 264
mbed_official 340:28d1f895c6fe 265 @endverbatim
mbed_official 340:28d1f895c6fe 266 * @{
mbed_official 340:28d1f895c6fe 267 */
mbed_official 340:28d1f895c6fe 268
mbed_official 340:28d1f895c6fe 269 /**
mbed_official 631:825f75ca301e 270 * @brief Start the IWDG.
mbed_official 340:28d1f895c6fe 271 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
mbed_official 340:28d1f895c6fe 272 * the configuration information for the specified IWDG module.
mbed_official 340:28d1f895c6fe 273 * @retval HAL status
mbed_official 340:28d1f895c6fe 274 */
mbed_official 340:28d1f895c6fe 275 HAL_StatusTypeDef HAL_IWDG_Start(IWDG_HandleTypeDef *hiwdg)
mbed_official 631:825f75ca301e 276 {
mbed_official 340:28d1f895c6fe 277 uint32_t tickstart = 0;
mbed_official 340:28d1f895c6fe 278
mbed_official 631:825f75ca301e 279 /* Process locked */
mbed_official 340:28d1f895c6fe 280 __HAL_LOCK(hiwdg);
mbed_official 631:825f75ca301e 281
mbed_official 631:825f75ca301e 282 /* Change IWDG peripheral state */
mbed_official 340:28d1f895c6fe 283 hiwdg->State = HAL_IWDG_STATE_BUSY;
mbed_official 631:825f75ca301e 284
mbed_official 340:28d1f895c6fe 285 /* Reload IWDG counter with value defined in the RLR register */
mbed_official 340:28d1f895c6fe 286 if ((hiwdg->Init.Window) == IWDG_WINDOW_DISABLE)
mbed_official 340:28d1f895c6fe 287 {
mbed_official 631:825f75ca301e 288 __HAL_IWDG_RELOAD_COUNTER(hiwdg);
mbed_official 340:28d1f895c6fe 289 }
mbed_official 340:28d1f895c6fe 290
mbed_official 631:825f75ca301e 291 /* Start the IWDG peripheral */
mbed_official 340:28d1f895c6fe 292 __HAL_IWDG_START(hiwdg);
mbed_official 340:28d1f895c6fe 293
mbed_official 340:28d1f895c6fe 294 tickstart = HAL_GetTick();
mbed_official 340:28d1f895c6fe 295
mbed_official 340:28d1f895c6fe 296 /* Wait until PVU, RVU, WVU flag are RESET */
mbed_official 340:28d1f895c6fe 297 while( (__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_PVU) != RESET)
mbed_official 631:825f75ca301e 298 &&(__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_RVU) != RESET)
mbed_official 631:825f75ca301e 299 &&(__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_WVU) != RESET) )
mbed_official 340:28d1f895c6fe 300 {
mbed_official 631:825f75ca301e 301
mbed_official 631:825f75ca301e 302 if((HAL_GetTick() - tickstart ) > HAL_IWDG_DEFAULT_TIMEOUT)
mbed_official 631:825f75ca301e 303 {
mbed_official 340:28d1f895c6fe 304 /* Set IWDG state */
mbed_official 340:28d1f895c6fe 305 hiwdg->State = HAL_IWDG_STATE_TIMEOUT;
mbed_official 631:825f75ca301e 306
mbed_official 631:825f75ca301e 307 /* Process unlocked */
mbed_official 340:28d1f895c6fe 308 __HAL_UNLOCK(hiwdg);
mbed_official 631:825f75ca301e 309
mbed_official 340:28d1f895c6fe 310 return HAL_TIMEOUT;
mbed_official 631:825f75ca301e 311 }
mbed_official 340:28d1f895c6fe 312 }
mbed_official 340:28d1f895c6fe 313
mbed_official 631:825f75ca301e 314 /* Change IWDG peripheral state */
mbed_official 631:825f75ca301e 315 hiwdg->State = HAL_IWDG_STATE_READY;
mbed_official 631:825f75ca301e 316
mbed_official 340:28d1f895c6fe 317 /* Process Unlocked */
mbed_official 340:28d1f895c6fe 318 __HAL_UNLOCK(hiwdg);
mbed_official 631:825f75ca301e 319
mbed_official 340:28d1f895c6fe 320 /* Return function status */
mbed_official 340:28d1f895c6fe 321 return HAL_OK;
mbed_official 340:28d1f895c6fe 322 }
mbed_official 340:28d1f895c6fe 323
mbed_official 340:28d1f895c6fe 324 /**
mbed_official 631:825f75ca301e 325 * @brief Refresh the IWDG.
mbed_official 340:28d1f895c6fe 326 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
mbed_official 340:28d1f895c6fe 327 * the configuration information for the specified IWDG module.
mbed_official 340:28d1f895c6fe 328 * @retval HAL status
mbed_official 340:28d1f895c6fe 329 */
mbed_official 340:28d1f895c6fe 330 HAL_StatusTypeDef HAL_IWDG_Refresh(IWDG_HandleTypeDef *hiwdg)
mbed_official 631:825f75ca301e 331 {
mbed_official 340:28d1f895c6fe 332 uint32_t tickstart = 0;
mbed_official 340:28d1f895c6fe 333
mbed_official 340:28d1f895c6fe 334 /* Process Locked */
mbed_official 631:825f75ca301e 335 __HAL_LOCK(hiwdg);
mbed_official 631:825f75ca301e 336
mbed_official 631:825f75ca301e 337 /* Change IWDG peripheral state */
mbed_official 340:28d1f895c6fe 338 hiwdg->State = HAL_IWDG_STATE_BUSY;
mbed_official 631:825f75ca301e 339
mbed_official 340:28d1f895c6fe 340 tickstart = HAL_GetTick();
mbed_official 340:28d1f895c6fe 341
mbed_official 340:28d1f895c6fe 342 /* Wait until RVU flag is RESET */
mbed_official 340:28d1f895c6fe 343 while(__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_RVU) != RESET)
mbed_official 340:28d1f895c6fe 344 {
mbed_official 631:825f75ca301e 345 if((HAL_GetTick() - tickstart ) > HAL_IWDG_DEFAULT_TIMEOUT)
mbed_official 631:825f75ca301e 346 {
mbed_official 340:28d1f895c6fe 347 /* Set IWDG state */
mbed_official 340:28d1f895c6fe 348 hiwdg->State = HAL_IWDG_STATE_TIMEOUT;
mbed_official 340:28d1f895c6fe 349
mbed_official 340:28d1f895c6fe 350 /* Process unlocked */
mbed_official 340:28d1f895c6fe 351 __HAL_UNLOCK(hiwdg);
mbed_official 340:28d1f895c6fe 352
mbed_official 340:28d1f895c6fe 353 return HAL_TIMEOUT;
mbed_official 631:825f75ca301e 354 }
mbed_official 340:28d1f895c6fe 355 }
mbed_official 340:28d1f895c6fe 356
mbed_official 340:28d1f895c6fe 357 /* Reload IWDG counter with value defined in the reload register */
mbed_official 340:28d1f895c6fe 358 __HAL_IWDG_RELOAD_COUNTER(hiwdg);
mbed_official 631:825f75ca301e 359
mbed_official 631:825f75ca301e 360 /* Change IWDG peripheral state */
mbed_official 631:825f75ca301e 361 hiwdg->State = HAL_IWDG_STATE_READY;
mbed_official 631:825f75ca301e 362
mbed_official 340:28d1f895c6fe 363 /* Process Unlocked */
mbed_official 340:28d1f895c6fe 364 __HAL_UNLOCK(hiwdg);
mbed_official 631:825f75ca301e 365
mbed_official 340:28d1f895c6fe 366 /* Return function status */
mbed_official 340:28d1f895c6fe 367 return HAL_OK;
mbed_official 340:28d1f895c6fe 368 }
mbed_official 340:28d1f895c6fe 369
mbed_official 340:28d1f895c6fe 370 /**
mbed_official 340:28d1f895c6fe 371 * @}
mbed_official 340:28d1f895c6fe 372 */
mbed_official 340:28d1f895c6fe 373
mbed_official 340:28d1f895c6fe 374 /** @defgroup IWDG_Exported_Functions_Group3 Peripheral State functions
mbed_official 631:825f75ca301e 375 * @brief Peripheral State functions.
mbed_official 340:28d1f895c6fe 376 *
mbed_official 631:825f75ca301e 377 @verbatim
mbed_official 340:28d1f895c6fe 378 ===============================================================================
mbed_official 340:28d1f895c6fe 379 ##### Peripheral State functions #####
mbed_official 631:825f75ca301e 380 ===============================================================================
mbed_official 340:28d1f895c6fe 381 [..]
mbed_official 631:825f75ca301e 382 This subsection permits to get in run-time the status of the peripheral.
mbed_official 340:28d1f895c6fe 383
mbed_official 340:28d1f895c6fe 384 @endverbatim
mbed_official 340:28d1f895c6fe 385 * @{
mbed_official 340:28d1f895c6fe 386 */
mbed_official 340:28d1f895c6fe 387
mbed_official 340:28d1f895c6fe 388 /**
mbed_official 631:825f75ca301e 389 * @brief Return the IWDG handle state.
mbed_official 340:28d1f895c6fe 390 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
mbed_official 340:28d1f895c6fe 391 * the configuration information for the specified IWDG module.
mbed_official 340:28d1f895c6fe 392 * @retval HAL state
mbed_official 340:28d1f895c6fe 393 */
mbed_official 340:28d1f895c6fe 394 HAL_IWDG_StateTypeDef HAL_IWDG_GetState(IWDG_HandleTypeDef *hiwdg)
mbed_official 340:28d1f895c6fe 395 {
mbed_official 631:825f75ca301e 396 /* Return IWDG handle state */
mbed_official 340:28d1f895c6fe 397 return hiwdg->State;
mbed_official 340:28d1f895c6fe 398 }
mbed_official 340:28d1f895c6fe 399
mbed_official 340:28d1f895c6fe 400 /**
mbed_official 340:28d1f895c6fe 401 * @}
mbed_official 340:28d1f895c6fe 402 */
mbed_official 340:28d1f895c6fe 403
mbed_official 340:28d1f895c6fe 404 /**
mbed_official 340:28d1f895c6fe 405 * @}
mbed_official 340:28d1f895c6fe 406 */
mbed_official 340:28d1f895c6fe 407
mbed_official 340:28d1f895c6fe 408 #endif /* HAL_IWDG_MODULE_ENABLED */
mbed_official 340:28d1f895c6fe 409 /**
mbed_official 340:28d1f895c6fe 410 * @}
mbed_official 340:28d1f895c6fe 411 */
mbed_official 340:28d1f895c6fe 412
mbed_official 340:28d1f895c6fe 413 /**
mbed_official 340:28d1f895c6fe 414 * @}
mbed_official 340:28d1f895c6fe 415 */
mbed_official 340:28d1f895c6fe 416
mbed_official 340:28d1f895c6fe 417 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/