en 129 / mbed-dev

fix LPC812 PWM

Dependents:   IR_LED_Send

Fork of mbed-dev by mbed official

targets/cmsis/TARGET_STM/TARGET_STM32L0/stm32l0xx_hal_iwdg.c@0:9b334a45a8ff, 2015-10-01 (annotated)

Committer:
bogdanm
Date:
Thu Oct 01 15:25:22 2015 +0300
Revision:
0:9b334a45a8ff
Child:
113:b3775bf36a83
Initial commit on mbed-dev



Replaces mbed-src (now inactive)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /**
bogdanm 0:9b334a45a8ff 2 ******************************************************************************
bogdanm 0:9b334a45a8ff 3 * @file stm32l0xx_hal_iwdg.c
bogdanm 0:9b334a45a8ff 4 * @author MCD Application Team
bogdanm 0:9b334a45a8ff 5 * @version V1.2.0
bogdanm 0:9b334a45a8ff 6 * @date 06-February-2015
bogdanm 0:9b334a45a8ff 7 * @brief IWDG HAL module driver.
bogdanm 0:9b334a45a8ff 8 * This file provides firmware functions to manage the following
bogdanm 0:9b334a45a8ff 9 * functionalities of the Independent Watchdog (IWDG) peripheral:
bogdanm 0:9b334a45a8ff 10 * + Initialization and de-initialization functions
bogdanm 0:9b334a45a8ff 11 * + IO operation functions
bogdanm 0:9b334a45a8ff 12 * + Peripheral State functions
bogdanm 0:9b334a45a8ff 13 *
bogdanm 0:9b334a45a8ff 14 @verbatim
bogdanm 0:9b334a45a8ff 15 ==============================================================================
bogdanm 0:9b334a45a8ff 16 ##### IWDG Generic features #####
bogdanm 0:9b334a45a8ff 17 ==============================================================================
bogdanm 0:9b334a45a8ff 18 [..]
bogdanm 0:9b334a45a8ff 19 (+) The IWDG can be started by either software or hardware (configurable
bogdanm 0:9b334a45a8ff 20 through option byte).
bogdanm 0:9b334a45a8ff 21
bogdanm 0:9b334a45a8ff 22 (+) The IWDG is clocked by its own dedicated Low-Speed clock (LSI) and
bogdanm 0:9b334a45a8ff 23 thus stays active even if the main clock fails.
bogdanm 0:9b334a45a8ff 24 Once the IWDG is started, the LSI is forced ON and cannot be disabled
bogdanm 0:9b334a45a8ff 25 (LSI cannot be disabled too), and the counter starts counting down from
bogdanm 0:9b334a45a8ff 26 the reset value of 0xFFF. When it reaches the end of count value (0x000)
bogdanm 0:9b334a45a8ff 27 a system reset is generated.
bogdanm 0:9b334a45a8ff 28
bogdanm 0:9b334a45a8ff 29 (+) The IWDG counter should be refreshed at regular intervals, otherwise the
bogdanm 0:9b334a45a8ff 30 watchdog generates an MCU reset when the counter reaches 0.
bogdanm 0:9b334a45a8ff 31
bogdanm 0:9b334a45a8ff 32 (+) The IWDG is implemented in the VDD voltage domain that is still functional
bogdanm 0:9b334a45a8ff 33 in STOP and STANDBY mode (IWDG reset can wake-up from STANDBY).
bogdanm 0:9b334a45a8ff 34 IWDGRST flag in RCC_CSR register can be used to inform when an IWDG
bogdanm 0:9b334a45a8ff 35 reset occurs.
bogdanm 0:9b334a45a8ff 36
bogdanm 0:9b334a45a8ff 37 [..] Min-max timeout value @32KHz (LSI): ~0.512ms / ~32.0s
bogdanm 0:9b334a45a8ff 38 The IWDG timeout may vary due to LSI frequency dispersion. STM32L0xx
bogdanm 0:9b334a45a8ff 39 devices provide the capability to measure the LSI frequency (LSI clock
bogdanm 0:9b334a45a8ff 40 connected internally to TIM5 CH4 input capture). The measured value
bogdanm 0:9b334a45a8ff 41 can be used to have an IWDG timeout with an acceptable accuracy.
bogdanm 0:9b334a45a8ff 42
bogdanm 0:9b334a45a8ff 43
bogdanm 0:9b334a45a8ff 44 ##### How to use this driver #####
bogdanm 0:9b334a45a8ff 45 ==============================================================================
bogdanm 0:9b334a45a8ff 46 [..]
bogdanm 0:9b334a45a8ff 47 If Window option is disabled
bogdanm 0:9b334a45a8ff 48
bogdanm 0:9b334a45a8ff 49 (+) Use IWDG using HAL_IWDG_Init() function to :
bogdanm 0:9b334a45a8ff 50 (++) Enable write access to IWDG_PR, IWDG_RLR.
bogdanm 0:9b334a45a8ff 51 (++) Configure the IWDG prescaler, counter reload value.
bogdanm 0:9b334a45a8ff 52 This reload value will be loaded in the IWDG counter each time the counter
bogdanm 0:9b334a45a8ff 53 is reloaded, then the IWDG will start counting down from this value.
bogdanm 0:9b334a45a8ff 54 (+) Use IWDG using HAL_IWDG_Start() function to :
bogdanm 0:9b334a45a8ff 55 (++) Reload IWDG counter with value defined in the IWDG_RLR register.
bogdanm 0:9b334a45a8ff 56 (++) Start the IWDG, when the IWDG is used in software mode (no need
bogdanm 0:9b334a45a8ff 57 to enable the LSI, it will be enabled by hardware).
bogdanm 0:9b334a45a8ff 58 (+) Then the application program must refresh the IWDG counter at regular
bogdanm 0:9b334a45a8ff 59 intervals during normal operation to prevent an MCU reset, using
bogdanm 0:9b334a45a8ff 60 HAL_IWDG_Refresh() function.
bogdanm 0:9b334a45a8ff 61 [..]
bogdanm 0:9b334a45a8ff 62 if Window option is enabled:
bogdanm 0:9b334a45a8ff 63
bogdanm 0:9b334a45a8ff 64 (+) Use IWDG using HAL_IWDG_Start() function to enable IWDG downcounter
bogdanm 0:9b334a45a8ff 65 (+) Use IWDG using HAL_IWDG_Init() function to :
bogdanm 0:9b334a45a8ff 66 (++) Enable write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers.
bogdanm 0:9b334a45a8ff 67 (++) Configure the IWDG prescaler, reload value and window value.
bogdanm 0:9b334a45a8ff 68 (+) Then the application program must refresh the IWDG counter at regular
bogdanm 0:9b334a45a8ff 69 intervals during normal operation to prevent an MCU reset, using
bogdanm 0:9b334a45a8ff 70 HAL_IWDG_Refresh() function.
bogdanm 0:9b334a45a8ff 71
bogdanm 0:9b334a45a8ff 72 *** IWDG HAL driver macros list ***
bogdanm 0:9b334a45a8ff 73 ====================================
bogdanm 0:9b334a45a8ff 74 [..]
bogdanm 0:9b334a45a8ff 75 Below the list of most used macros in IWDG HAL driver.
bogdanm 0:9b334a45a8ff 76
bogdanm 0:9b334a45a8ff 77 (+) __HAL_IWDG_START: Enable the IWDG peripheral
bogdanm 0:9b334a45a8ff 78 (+) __HAL_IWDG_RELOAD_COUNTER: Reloads IWDG counter with value defined in the reload register
bogdanm 0:9b334a45a8ff 79 (+) IWDG_ENABLE_WRITE_ACCESS : Enable write access to IWDG_PR and IWDG_RLR registers
bogdanm 0:9b334a45a8ff 80 (+) __HAL_IWDG_DISABLE_WRITE_ACCESS : Disable write access to IWDG_PR and IWDG_RLR registers
bogdanm 0:9b334a45a8ff 81 (+) __HAL_IWDG_GET_FLAG: Get the selected IWDG's flag status
bogdanm 0:9b334a45a8ff 82
bogdanm 0:9b334a45a8ff 83 @endverbatim
bogdanm 0:9b334a45a8ff 84 ******************************************************************************
bogdanm 0:9b334a45a8ff 85 * @attention
bogdanm 0:9b334a45a8ff 86 *
bogdanm 0:9b334a45a8ff 87 * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
bogdanm 0:9b334a45a8ff 88 *
bogdanm 0:9b334a45a8ff 89 * Redistribution and use in source and binary forms, with or without modification,
bogdanm 0:9b334a45a8ff 90 * are permitted provided that the following conditions are met:
bogdanm 0:9b334a45a8ff 91 * 1. Redistributions of source code must retain the above copyright notice,
bogdanm 0:9b334a45a8ff 92 * this list of conditions and the following disclaimer.
bogdanm 0:9b334a45a8ff 93 * 2. Redistributions in binary form must reproduce the above copyright notice,
bogdanm 0:9b334a45a8ff 94 * this list of conditions and the following disclaimer in the documentation
bogdanm 0:9b334a45a8ff 95 * and/or other materials provided with the distribution.
bogdanm 0:9b334a45a8ff 96 * 3. Neither the name of STMicroelectronics nor the names of its contributors
bogdanm 0:9b334a45a8ff 97 * may be used to endorse or promote products derived from this software
bogdanm 0:9b334a45a8ff 98 * without specific prior written permission.
bogdanm 0:9b334a45a8ff 99 *
bogdanm 0:9b334a45a8ff 100 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
bogdanm 0:9b334a45a8ff 101 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
bogdanm 0:9b334a45a8ff 102 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
bogdanm 0:9b334a45a8ff 103 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
bogdanm 0:9b334a45a8ff 104 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
bogdanm 0:9b334a45a8ff 105 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
bogdanm 0:9b334a45a8ff 106 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
bogdanm 0:9b334a45a8ff 107 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
bogdanm 0:9b334a45a8ff 108 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
bogdanm 0:9b334a45a8ff 109 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
bogdanm 0:9b334a45a8ff 110 *
bogdanm 0:9b334a45a8ff 111 ******************************************************************************
bogdanm 0:9b334a45a8ff 112 */
bogdanm 0:9b334a45a8ff 113
bogdanm 0:9b334a45a8ff 114 /* Includes ------------------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 115 #include "stm32l0xx_hal.h"
bogdanm 0:9b334a45a8ff 116
bogdanm 0:9b334a45a8ff 117 /** @addtogroup STM32L0xx_HAL_Driver
bogdanm 0:9b334a45a8ff 118 * @{
bogdanm 0:9b334a45a8ff 119 */
bogdanm 0:9b334a45a8ff 120
bogdanm 0:9b334a45a8ff 121 /** @addtogroup IWDG
bogdanm 0:9b334a45a8ff 122 * @brief IWDG HAL module driver.
bogdanm 0:9b334a45a8ff 123 * @{
bogdanm 0:9b334a45a8ff 124 */
bogdanm 0:9b334a45a8ff 125
bogdanm 0:9b334a45a8ff 126 #ifdef HAL_IWDG_MODULE_ENABLED
bogdanm 0:9b334a45a8ff 127
bogdanm 0:9b334a45a8ff 128 /* TimeOut value */
bogdanm 0:9b334a45a8ff 129 #define HAL_IWDG_DEFAULT_TIMEOUT (uint32_t)1000
bogdanm 0:9b334a45a8ff 130
bogdanm 0:9b334a45a8ff 131 /* Local define used to check the SR status register */
bogdanm 0:9b334a45a8ff 132 #define IWDG_SR_FLAGS (IWDG_FLAG_PVU | IWDG_FLAG_RVU | IWDG_FLAG_WVU)
bogdanm 0:9b334a45a8ff 133
bogdanm 0:9b334a45a8ff 134 /** @addtogroup IWDG_Exported_Functions
bogdanm 0:9b334a45a8ff 135 * @{
bogdanm 0:9b334a45a8ff 136 */
bogdanm 0:9b334a45a8ff 137
bogdanm 0:9b334a45a8ff 138 /** @addtogroup IWDG_Exported_Functions_Group1
bogdanm 0:9b334a45a8ff 139 * @brief Initialization and Configuration functions.
bogdanm 0:9b334a45a8ff 140 *
bogdanm 0:9b334a45a8ff 141 @verbatim
bogdanm 0:9b334a45a8ff 142 ===============================================================================
bogdanm 0:9b334a45a8ff 143 ##### Initialization and de-initialization functions #####
bogdanm 0:9b334a45a8ff 144 ===============================================================================
bogdanm 0:9b334a45a8ff 145 [..] This section provides functions allowing to:
bogdanm 0:9b334a45a8ff 146 (+) Initialize the IWDG according to the specified parameters
bogdanm 0:9b334a45a8ff 147 in the IWDG_InitTypeDef and create the associated handle
bogdanm 0:9b334a45a8ff 148 (+) Manage Window option
bogdanm 0:9b334a45a8ff 149 (+) Initialize the IWDG MSP
bogdanm 0:9b334a45a8ff 150
bogdanm 0:9b334a45a8ff 151 @endverbatim
bogdanm 0:9b334a45a8ff 152 * @{
bogdanm 0:9b334a45a8ff 153 */
bogdanm 0:9b334a45a8ff 154
bogdanm 0:9b334a45a8ff 155 /**
bogdanm 0:9b334a45a8ff 156 * @brief Initializes the IWDG according to the specified
bogdanm 0:9b334a45a8ff 157 * parameters in the IWDG_InitTypeDef and creates the associated handle.
bogdanm 0:9b334a45a8ff 158 *
bogdanm 0:9b334a45a8ff 159 * When using the 'window option', the function HAL_IWDG_Start() must
bogdanm 0:9b334a45a8ff 160 * be called before calling this function
bogdanm 0:9b334a45a8ff 161 *
bogdanm 0:9b334a45a8ff 162 * @param hiwdg : pointer to a IWDG_HandleTypeDef structure that contains
bogdanm 0:9b334a45a8ff 163 * the configuration information for the specified IWDG module.
bogdanm 0:9b334a45a8ff 164 * @retval HAL status
bogdanm 0:9b334a45a8ff 165 */
bogdanm 0:9b334a45a8ff 166
bogdanm 0:9b334a45a8ff 167 HAL_StatusTypeDef HAL_IWDG_Init(IWDG_HandleTypeDef *hiwdg)
bogdanm 0:9b334a45a8ff 168 {
bogdanm 0:9b334a45a8ff 169 uint32_t tickstart = 0;
bogdanm 0:9b334a45a8ff 170
bogdanm 0:9b334a45a8ff 171 /* Check the IWDG handle allocation */
bogdanm 0:9b334a45a8ff 172 if(hiwdg == NULL)
bogdanm 0:9b334a45a8ff 173 {
bogdanm 0:9b334a45a8ff 174 return HAL_ERROR;
bogdanm 0:9b334a45a8ff 175 }
bogdanm 0:9b334a45a8ff 176
bogdanm 0:9b334a45a8ff 177 /* Check the parameters */
bogdanm 0:9b334a45a8ff 178 assert_param(IS_IWDG_PRESCALER(hiwdg->Init.Prescaler));
bogdanm 0:9b334a45a8ff 179 assert_param(IS_IWDG_RELOAD(hiwdg->Init.Reload));
bogdanm 0:9b334a45a8ff 180 assert_param(IS_IWDG_WINDOW(hiwdg->Init.Window));
bogdanm 0:9b334a45a8ff 181
bogdanm 0:9b334a45a8ff 182 /* Check pending flag, if previous update not done, return error */
bogdanm 0:9b334a45a8ff 183 if(((hiwdg->Instance->SR) & IWDG_SR_FLAGS) != 0)
bogdanm 0:9b334a45a8ff 184 {
bogdanm 0:9b334a45a8ff 185 return HAL_ERROR;
bogdanm 0:9b334a45a8ff 186 }
bogdanm 0:9b334a45a8ff 187
bogdanm 0:9b334a45a8ff 188 if(hiwdg->State == HAL_IWDG_STATE_RESET)
bogdanm 0:9b334a45a8ff 189 {
bogdanm 0:9b334a45a8ff 190 /* Init the low level hardware */
bogdanm 0:9b334a45a8ff 191 HAL_IWDG_MspInit(hiwdg);
bogdanm 0:9b334a45a8ff 192 }
bogdanm 0:9b334a45a8ff 193
bogdanm 0:9b334a45a8ff 194 /* Change IWDG peripheral state */
bogdanm 0:9b334a45a8ff 195 hiwdg->State = HAL_IWDG_STATE_BUSY;
bogdanm 0:9b334a45a8ff 196
bogdanm 0:9b334a45a8ff 197 /* Enable write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers */
bogdanm 0:9b334a45a8ff 198 /* by writing 0x5555 in KR */
bogdanm 0:9b334a45a8ff 199 IWDG_ENABLE_WRITE_ACCESS(hiwdg);
bogdanm 0:9b334a45a8ff 200
bogdanm 0:9b334a45a8ff 201 /* Write to IWDG registers the IWDG_Prescaler & IWDG_Reload values to work with */
bogdanm 0:9b334a45a8ff 202 MODIFY_REG(hiwdg->Instance->PR, (uint32_t)IWDG_PR_PR, hiwdg->Init.Prescaler);
bogdanm 0:9b334a45a8ff 203 MODIFY_REG(hiwdg->Instance->RLR, (uint32_t)IWDG_RLR_RL, hiwdg->Init.Reload);
bogdanm 0:9b334a45a8ff 204
bogdanm 0:9b334a45a8ff 205 /* check if window option is enabled */
bogdanm 0:9b334a45a8ff 206 if (((hiwdg->Init.Window) != IWDG_WINDOW_DISABLE) || ((hiwdg->Instance->WINR) != IWDG_WINDOW_DISABLE))
bogdanm 0:9b334a45a8ff 207 {
bogdanm 0:9b334a45a8ff 208 tickstart = HAL_GetTick();
bogdanm 0:9b334a45a8ff 209
bogdanm 0:9b334a45a8ff 210 /* Wait for register to be updated */
bogdanm 0:9b334a45a8ff 211 while (((hiwdg->Instance->SR) & IWDG_SR_FLAGS) != 0)
bogdanm 0:9b334a45a8ff 212 {
bogdanm 0:9b334a45a8ff 213 if((HAL_GetTick()-tickstart) > HAL_IWDG_DEFAULT_TIMEOUT)
bogdanm 0:9b334a45a8ff 214 {
bogdanm 0:9b334a45a8ff 215 /* Set IWDG state */
bogdanm 0:9b334a45a8ff 216 hiwdg->State = HAL_IWDG_STATE_TIMEOUT;
bogdanm 0:9b334a45a8ff 217 return HAL_TIMEOUT;
bogdanm 0:9b334a45a8ff 218 }
bogdanm 0:9b334a45a8ff 219 }
bogdanm 0:9b334a45a8ff 220
bogdanm 0:9b334a45a8ff 221 /* Write to IWDG WINR the IWDG_Window value to compare with */
bogdanm 0:9b334a45a8ff 222 MODIFY_REG(hiwdg->Instance->WINR, (uint32_t)IWDG_WINR_WIN, hiwdg->Init.Window);
bogdanm 0:9b334a45a8ff 223
bogdanm 0:9b334a45a8ff 224 }
bogdanm 0:9b334a45a8ff 225 /* Change IWDG peripheral state */
bogdanm 0:9b334a45a8ff 226 hiwdg->State = HAL_IWDG_STATE_READY;
bogdanm 0:9b334a45a8ff 227
bogdanm 0:9b334a45a8ff 228 /* Return function status */
bogdanm 0:9b334a45a8ff 229 return HAL_OK;
bogdanm 0:9b334a45a8ff 230 }
bogdanm 0:9b334a45a8ff 231
bogdanm 0:9b334a45a8ff 232 /**
bogdanm 0:9b334a45a8ff 233 * @brief Initializes the IWDG MSP.
bogdanm 0:9b334a45a8ff 234 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
bogdanm 0:9b334a45a8ff 235 * the configuration information for the specified IWDG module.
bogdanm 0:9b334a45a8ff 236 * @retval None
bogdanm 0:9b334a45a8ff 237 */
bogdanm 0:9b334a45a8ff 238 __weak void HAL_IWDG_MspInit(IWDG_HandleTypeDef *hiwdg)
bogdanm 0:9b334a45a8ff 239 {
bogdanm 0:9b334a45a8ff 240 /* NOTE : This function Should not be modified, when the callback is needed,
bogdanm 0:9b334a45a8ff 241 the HAL_IWDG_MspInit could be implemented in the user file
bogdanm 0:9b334a45a8ff 242 */
bogdanm 0:9b334a45a8ff 243 }
bogdanm 0:9b334a45a8ff 244
bogdanm 0:9b334a45a8ff 245 /**
bogdanm 0:9b334a45a8ff 246 * @}
bogdanm 0:9b334a45a8ff 247 */
bogdanm 0:9b334a45a8ff 248
bogdanm 0:9b334a45a8ff 249 /** @addtogroup IWDG_Exported_Functions_Group2
bogdanm 0:9b334a45a8ff 250 * @brief IO operation functions
bogdanm 0:9b334a45a8ff 251 *
bogdanm 0:9b334a45a8ff 252 @verbatim
bogdanm 0:9b334a45a8ff 253 ===============================================================================
bogdanm 0:9b334a45a8ff 254 ##### IO operation functions #####
bogdanm 0:9b334a45a8ff 255 ===============================================================================
bogdanm 0:9b334a45a8ff 256 [..] This section provides functions allowing to:
bogdanm 0:9b334a45a8ff 257 (+) Start the IWDG.
bogdanm 0:9b334a45a8ff 258 (+) Refresh the IWDG.
bogdanm 0:9b334a45a8ff 259
bogdanm 0:9b334a45a8ff 260 @endverbatim
bogdanm 0:9b334a45a8ff 261 * @{
bogdanm 0:9b334a45a8ff 262 */
bogdanm 0:9b334a45a8ff 263
bogdanm 0:9b334a45a8ff 264 /**
bogdanm 0:9b334a45a8ff 265 * @brief Starts the IWDG.
bogdanm 0:9b334a45a8ff 266 * @param hiwdg : pointer to a IWDG_HandleTypeDef structure that contains
bogdanm 0:9b334a45a8ff 267 * the configuration information for the specified IWDG module.
bogdanm 0:9b334a45a8ff 268 * @retval HAL status
bogdanm 0:9b334a45a8ff 269 */
bogdanm 0:9b334a45a8ff 270 HAL_StatusTypeDef HAL_IWDG_Start(IWDG_HandleTypeDef *hiwdg)
bogdanm 0:9b334a45a8ff 271 {
bogdanm 0:9b334a45a8ff 272 uint32_t tickstart = 0;
bogdanm 0:9b334a45a8ff 273
bogdanm 0:9b334a45a8ff 274 /* Process locked */
bogdanm 0:9b334a45a8ff 275 __HAL_LOCK(hiwdg);
bogdanm 0:9b334a45a8ff 276
bogdanm 0:9b334a45a8ff 277 /* Change IWDG peripheral state */
bogdanm 0:9b334a45a8ff 278 hiwdg->State = HAL_IWDG_STATE_BUSY;
bogdanm 0:9b334a45a8ff 279
bogdanm 0:9b334a45a8ff 280 /* Enable the IWDG peripheral */
bogdanm 0:9b334a45a8ff 281 __HAL_IWDG_START(hiwdg);
bogdanm 0:9b334a45a8ff 282
bogdanm 0:9b334a45a8ff 283 /* Reload IWDG counter with value defined in the RLR register */
bogdanm 0:9b334a45a8ff 284 if ((hiwdg->Init.Window) == IWDG_WINDOW_DISABLE)
bogdanm 0:9b334a45a8ff 285 {
bogdanm 0:9b334a45a8ff 286 __HAL_IWDG_RELOAD_COUNTER(hiwdg);
bogdanm 0:9b334a45a8ff 287 }
bogdanm 0:9b334a45a8ff 288
bogdanm 0:9b334a45a8ff 289 tickstart = HAL_GetTick();
bogdanm 0:9b334a45a8ff 290
bogdanm 0:9b334a45a8ff 291 /* Wait until PVU, RVU, WVU flag are RESET */
bogdanm 0:9b334a45a8ff 292 while (((hiwdg->Instance->SR) & IWDG_SR_FLAGS) != 0)
bogdanm 0:9b334a45a8ff 293 {
bogdanm 0:9b334a45a8ff 294 if((HAL_GetTick()-tickstart) > HAL_IWDG_DEFAULT_TIMEOUT)
bogdanm 0:9b334a45a8ff 295 {
bogdanm 0:9b334a45a8ff 296 /* Set IWDG state */
bogdanm 0:9b334a45a8ff 297 hiwdg->State = HAL_IWDG_STATE_TIMEOUT;
bogdanm 0:9b334a45a8ff 298
bogdanm 0:9b334a45a8ff 299 /* Process unlocked */
bogdanm 0:9b334a45a8ff 300 __HAL_UNLOCK(hiwdg);
bogdanm 0:9b334a45a8ff 301 return HAL_TIMEOUT;
bogdanm 0:9b334a45a8ff 302 }
bogdanm 0:9b334a45a8ff 303 }
bogdanm 0:9b334a45a8ff 304
bogdanm 0:9b334a45a8ff 305 /* Change IWDG peripheral state */
bogdanm 0:9b334a45a8ff 306 hiwdg->State = HAL_IWDG_STATE_READY;
bogdanm 0:9b334a45a8ff 307
bogdanm 0:9b334a45a8ff 308 /* Process Unlocked */
bogdanm 0:9b334a45a8ff 309 __HAL_UNLOCK(hiwdg);
bogdanm 0:9b334a45a8ff 310
bogdanm 0:9b334a45a8ff 311 /* Return function status */
bogdanm 0:9b334a45a8ff 312 return HAL_OK;
bogdanm 0:9b334a45a8ff 313 }
bogdanm 0:9b334a45a8ff 314
bogdanm 0:9b334a45a8ff 315 /**
bogdanm 0:9b334a45a8ff 316 * @brief Refreshes the IWDG.
bogdanm 0:9b334a45a8ff 317 * @param hiwdg : pointer to a IWDG_HandleTypeDef structure that contains
bogdanm 0:9b334a45a8ff 318 * the configuration information for the specified IWDG module.
bogdanm 0:9b334a45a8ff 319 * @retval HAL status
bogdanm 0:9b334a45a8ff 320 */
bogdanm 0:9b334a45a8ff 321 HAL_StatusTypeDef HAL_IWDG_Refresh(IWDG_HandleTypeDef *hiwdg)
bogdanm 0:9b334a45a8ff 322 {
bogdanm 0:9b334a45a8ff 323 uint32_t tickstart = 0;
bogdanm 0:9b334a45a8ff 324
bogdanm 0:9b334a45a8ff 325 /* Process Locked */
bogdanm 0:9b334a45a8ff 326 __HAL_LOCK(hiwdg);
bogdanm 0:9b334a45a8ff 327
bogdanm 0:9b334a45a8ff 328 /* Change IWDG peripheral state */
bogdanm 0:9b334a45a8ff 329 hiwdg->State = HAL_IWDG_STATE_BUSY;
bogdanm 0:9b334a45a8ff 330
bogdanm 0:9b334a45a8ff 331 tickstart = HAL_GetTick();
bogdanm 0:9b334a45a8ff 332
bogdanm 0:9b334a45a8ff 333 /* Wait until RVU flag is RESET */
bogdanm 0:9b334a45a8ff 334 while(__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_RVU) != RESET)
bogdanm 0:9b334a45a8ff 335 {
bogdanm 0:9b334a45a8ff 336 if((HAL_GetTick()-tickstart) > HAL_IWDG_DEFAULT_TIMEOUT)
bogdanm 0:9b334a45a8ff 337 {
bogdanm 0:9b334a45a8ff 338 /* Set IWDG state */
bogdanm 0:9b334a45a8ff 339 hiwdg->State = HAL_IWDG_STATE_TIMEOUT;
bogdanm 0:9b334a45a8ff 340
bogdanm 0:9b334a45a8ff 341 /* Process unlocked */
bogdanm 0:9b334a45a8ff 342 __HAL_UNLOCK(hiwdg);
bogdanm 0:9b334a45a8ff 343
bogdanm 0:9b334a45a8ff 344 return HAL_TIMEOUT;
bogdanm 0:9b334a45a8ff 345 }
bogdanm 0:9b334a45a8ff 346 }
bogdanm 0:9b334a45a8ff 347
bogdanm 0:9b334a45a8ff 348 /* Reload IWDG counter with value defined in the reload register */
bogdanm 0:9b334a45a8ff 349 __HAL_IWDG_RELOAD_COUNTER(hiwdg);
bogdanm 0:9b334a45a8ff 350
bogdanm 0:9b334a45a8ff 351 /* Change IWDG peripheral state */
bogdanm 0:9b334a45a8ff 352 hiwdg->State = HAL_IWDG_STATE_READY;
bogdanm 0:9b334a45a8ff 353
bogdanm 0:9b334a45a8ff 354 /* Process Unlocked */
bogdanm 0:9b334a45a8ff 355 __HAL_UNLOCK(hiwdg);
bogdanm 0:9b334a45a8ff 356
bogdanm 0:9b334a45a8ff 357 /* Return function status */
bogdanm 0:9b334a45a8ff 358 return HAL_OK;
bogdanm 0:9b334a45a8ff 359 }
bogdanm 0:9b334a45a8ff 360
bogdanm 0:9b334a45a8ff 361 /**
bogdanm 0:9b334a45a8ff 362 * @}
bogdanm 0:9b334a45a8ff 363 */
bogdanm 0:9b334a45a8ff 364
bogdanm 0:9b334a45a8ff 365 /** @addtogroup IWDG_Exported_Functions_Group3
bogdanm 0:9b334a45a8ff 366 * @brief Peripheral State functions.
bogdanm 0:9b334a45a8ff 367 *
bogdanm 0:9b334a45a8ff 368 @verbatim
bogdanm 0:9b334a45a8ff 369 ===============================================================================
bogdanm 0:9b334a45a8ff 370 ##### Peripheral State functions #####
bogdanm 0:9b334a45a8ff 371 ===============================================================================
bogdanm 0:9b334a45a8ff 372 [..]
bogdanm 0:9b334a45a8ff 373 This subsection permits to get in run-time the status of the peripheral
bogdanm 0:9b334a45a8ff 374 and the data flow.
bogdanm 0:9b334a45a8ff 375
bogdanm 0:9b334a45a8ff 376 @endverbatim
bogdanm 0:9b334a45a8ff 377 * @{
bogdanm 0:9b334a45a8ff 378 */
bogdanm 0:9b334a45a8ff 379
bogdanm 0:9b334a45a8ff 380 /**
bogdanm 0:9b334a45a8ff 381 * @brief Returns the IWDG state.
bogdanm 0:9b334a45a8ff 382 * @param hiwdg : pointer to a IWDG_HandleTypeDef structure that contains
bogdanm 0:9b334a45a8ff 383 * the configuration information for the specified IWDG module.
bogdanm 0:9b334a45a8ff 384 * @retval HAL state
bogdanm 0:9b334a45a8ff 385 */
bogdanm 0:9b334a45a8ff 386 HAL_IWDG_StateTypeDef HAL_IWDG_GetState(IWDG_HandleTypeDef *hiwdg)
bogdanm 0:9b334a45a8ff 387 {
bogdanm 0:9b334a45a8ff 388 return hiwdg->State;
bogdanm 0:9b334a45a8ff 389 }
bogdanm 0:9b334a45a8ff 390
bogdanm 0:9b334a45a8ff 391 /**
bogdanm 0:9b334a45a8ff 392 * @}
bogdanm 0:9b334a45a8ff 393 */
bogdanm 0:9b334a45a8ff 394
bogdanm 0:9b334a45a8ff 395 /**
bogdanm 0:9b334a45a8ff 396 * @}
bogdanm 0:9b334a45a8ff 397 */
bogdanm 0:9b334a45a8ff 398
bogdanm 0:9b334a45a8ff 399 #endif /* HAL_IWDG_MODULE_ENABLED */
bogdanm 0:9b334a45a8ff 400 /**
bogdanm 0:9b334a45a8ff 401 * @}
bogdanm 0:9b334a45a8ff 402 */
bogdanm 0:9b334a45a8ff 403
bogdanm 0:9b334a45a8ff 404 /**
bogdanm 0:9b334a45a8ff 405 * @}
bogdanm 0:9b334a45a8ff 406 */
bogdanm 0:9b334a45a8ff 407
bogdanm 0:9b334a45a8ff 408 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
bogdanm 0:9b334a45a8ff 409