en 129 / mbed-dev

fix LPC812 PWM

Dependents:   IR_LED_Send

Fork of mbed-dev by mbed official

targets/cmsis/TARGET_STM/TARGET_STM32F0/stm32f0xx_hal_iwdg.c@0:9b334a45a8ff, 2015-10-01 (annotated)

Committer:
bogdanm
Date:
Thu Oct 01 15:25:22 2015 +0300
Revision:
0:9b334a45a8ff
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 stm32f0xx_hal_iwdg.c
bogdanm 0:9b334a45a8ff 4 * @author MCD Application Team
bogdanm 0:9b334a45a8ff 5 * @version V1.3.0
bogdanm 0:9b334a45a8ff 6 * @date 26-June-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 Configuration 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 Specific 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 (+) The IWDG is clocked by its own dedicated Low-Speed clock (LSI) and
bogdanm 0:9b334a45a8ff 22 thus stays active even if the main clock fails.
bogdanm 0:9b334a45a8ff 23 (+) Once the IWDG is started, the LSI is forced ON and cannot be disabled
bogdanm 0:9b334a45a8ff 24 (LSI cannot be disabled too), and the counter starts counting down from
bogdanm 0:9b334a45a8ff 25 the reset value of 0xFFF. When it reaches the end of count value (0x000)
bogdanm 0:9b334a45a8ff 26 a system reset is generated.
bogdanm 0:9b334a45a8ff 27 (+) The IWDG counter should be refreshed at regular intervals, otherwise the
bogdanm 0:9b334a45a8ff 28 watchdog generates an MCU reset when the counter reaches 0.
bogdanm 0:9b334a45a8ff 29 (+) The IWDG is implemented in the VDD voltage domain that is still functional
bogdanm 0:9b334a45a8ff 30 in STOP and STANDBY mode (IWDG reset can wake-up from STANDBY).
bogdanm 0:9b334a45a8ff 31 (+) IWDGRST flag in RCC_CSR register can be used to inform when an IWDG
bogdanm 0:9b334a45a8ff 32 reset occurs.
bogdanm 0:9b334a45a8ff 33 (+) Min-max timeout value @41KHz (LSI): ~0.1ms / ~25.5s
bogdanm 0:9b334a45a8ff 34 The IWDG timeout may vary due to LSI frequency dispersion. STM32F0x
bogdanm 0:9b334a45a8ff 35 devices provide the capability to measure the LSI frequency (LSI clock
bogdanm 0:9b334a45a8ff 36 connected internally to TIM16 CH1 input capture). The measured value
bogdanm 0:9b334a45a8ff 37 can be used to have an IWDG timeout with an acceptable accuracy.
bogdanm 0:9b334a45a8ff 38 For more information, please refer to the STM32F0x Reference manual.
bogdanm 0:9b334a45a8ff 39
bogdanm 0:9b334a45a8ff 40 ##### How to use this driver #####
bogdanm 0:9b334a45a8ff 41 ===============================================================================
bogdanm 0:9b334a45a8ff 42 [..]
bogdanm 0:9b334a45a8ff 43 (#) if Window option is disabled
bogdanm 0:9b334a45a8ff 44 (++) Use IWDG using HAL_IWDG_Init() function to :
bogdanm 0:9b334a45a8ff 45 (+++) Enable write access to IWDG_PR, IWDG_RLR.
bogdanm 0:9b334a45a8ff 46 (+++) Configure the IWDG prescaler, counter reload value.
bogdanm 0:9b334a45a8ff 47 This reload value will be loaded in the IWDG counter each time the counter
bogdanm 0:9b334a45a8ff 48 is reloaded, then the IWDG will start counting down from this value.
bogdanm 0:9b334a45a8ff 49 (++) Use IWDG using HAL_IWDG_Start() function to :
bogdanm 0:9b334a45a8ff 50 (+++) Reload IWDG counter with value defined in the IWDG_RLR register.
bogdanm 0:9b334a45a8ff 51 (+++) Start the IWDG, when the IWDG is used in software mode (no need
bogdanm 0:9b334a45a8ff 52 to enable the LSI, it will be enabled by hardware).
bogdanm 0:9b334a45a8ff 53 (++) Then the application program must refresh the IWDG counter at regular
bogdanm 0:9b334a45a8ff 54 intervals during normal operation to prevent an MCU reset, using
bogdanm 0:9b334a45a8ff 55 HAL_IWDG_Refresh() function.
bogdanm 0:9b334a45a8ff 56 (#) if Window option is enabled:
bogdanm 0:9b334a45a8ff 57 (++) Use IWDG using HAL_IWDG_Start() function to enable IWDG downcounter
bogdanm 0:9b334a45a8ff 58 (++) Use IWDG using HAL_IWDG_Init() function to :
bogdanm 0:9b334a45a8ff 59 (+++) Enable write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers.
bogdanm 0:9b334a45a8ff 60 (+++) Configure the IWDG prescaler, reload value and window value.
bogdanm 0:9b334a45a8ff 61 (++) Then the application program must refresh the IWDG counter at regular
bogdanm 0:9b334a45a8ff 62 intervals during normal operation to prevent an MCU reset, using
bogdanm 0:9b334a45a8ff 63 HAL_IWDG_Refresh() function.
bogdanm 0:9b334a45a8ff 64
bogdanm 0:9b334a45a8ff 65 *** IWDG HAL driver macros list ***
bogdanm 0:9b334a45a8ff 66 ====================================
bogdanm 0:9b334a45a8ff 67 [..]
bogdanm 0:9b334a45a8ff 68 Below the list of most used macros in IWDG HAL driver.
bogdanm 0:9b334a45a8ff 69
bogdanm 0:9b334a45a8ff 70 (+) __HAL_IWDG_START: Enable the IWDG peripheral
bogdanm 0:9b334a45a8ff 71 (+) __HAL_IWDG_RELOAD_COUNTER: Reloads IWDG counter with value defined in the reload register
bogdanm 0:9b334a45a8ff 72 (+) IWDG_ENABLE_WRITE_ACCESS : Enable write access to IWDG_PR and IWDG_RLR registers
bogdanm 0:9b334a45a8ff 73 (+) IWDG_DISABLE_WRITE_ACCESS : Disable write access to IWDG_PR and IWDG_RLR registers
bogdanm 0:9b334a45a8ff 74 (+) __HAL_IWDG_GET_FLAG: Get the selected IWDG's flag status
bogdanm 0:9b334a45a8ff 75
bogdanm 0:9b334a45a8ff 76 @endverbatim
bogdanm 0:9b334a45a8ff 77 ******************************************************************************
bogdanm 0:9b334a45a8ff 78 * @attention
bogdanm 0:9b334a45a8ff 79 *
bogdanm 0:9b334a45a8ff 80 * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
bogdanm 0:9b334a45a8ff 81 *
bogdanm 0:9b334a45a8ff 82 * Redistribution and use in source and binary forms, with or without modification,
bogdanm 0:9b334a45a8ff 83 * are permitted provided that the following conditions are met:
bogdanm 0:9b334a45a8ff 84 * 1. Redistributions of source code must retain the above copyright notice,
bogdanm 0:9b334a45a8ff 85 * this list of conditions and the following disclaimer.
bogdanm 0:9b334a45a8ff 86 * 2. Redistributions in binary form must reproduce the above copyright notice,
bogdanm 0:9b334a45a8ff 87 * this list of conditions and the following disclaimer in the documentation
bogdanm 0:9b334a45a8ff 88 * and/or other materials provided with the distribution.
bogdanm 0:9b334a45a8ff 89 * 3. Neither the name of STMicroelectronics nor the names of its contributors
bogdanm 0:9b334a45a8ff 90 * may be used to endorse or promote products derived from this software
bogdanm 0:9b334a45a8ff 91 * without specific prior written permission.
bogdanm 0:9b334a45a8ff 92 *
bogdanm 0:9b334a45a8ff 93 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
bogdanm 0:9b334a45a8ff 94 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
bogdanm 0:9b334a45a8ff 95 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
bogdanm 0:9b334a45a8ff 96 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
bogdanm 0:9b334a45a8ff 97 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
bogdanm 0:9b334a45a8ff 98 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
bogdanm 0:9b334a45a8ff 99 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
bogdanm 0:9b334a45a8ff 100 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
bogdanm 0:9b334a45a8ff 101 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
bogdanm 0:9b334a45a8ff 102 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
bogdanm 0:9b334a45a8ff 103 *
bogdanm 0:9b334a45a8ff 104 ******************************************************************************
bogdanm 0:9b334a45a8ff 105 */
bogdanm 0:9b334a45a8ff 106
bogdanm 0:9b334a45a8ff 107 /* Includes ------------------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 108 #include "stm32f0xx_hal.h"
bogdanm 0:9b334a45a8ff 109
bogdanm 0:9b334a45a8ff 110 /** @addtogroup STM32F0xx_HAL_Driver
bogdanm 0:9b334a45a8ff 111 * @{
bogdanm 0:9b334a45a8ff 112 */
bogdanm 0:9b334a45a8ff 113
bogdanm 0:9b334a45a8ff 114 /** @defgroup IWDG IWDG
bogdanm 0:9b334a45a8ff 115 * @brief IWDG HAL module driver.
bogdanm 0:9b334a45a8ff 116 * @{
bogdanm 0:9b334a45a8ff 117 */
bogdanm 0:9b334a45a8ff 118
bogdanm 0:9b334a45a8ff 119 #ifdef HAL_IWDG_MODULE_ENABLED
bogdanm 0:9b334a45a8ff 120
bogdanm 0:9b334a45a8ff 121 /* Private typedef -----------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 122 /* Private define ------------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 123 /** @defgroup IWDG_Private_Defines IWDG Private Defines
bogdanm 0:9b334a45a8ff 124 * @{
bogdanm 0:9b334a45a8ff 125 */
bogdanm 0:9b334a45a8ff 126
bogdanm 0:9b334a45a8ff 127 #define HAL_IWDG_DEFAULT_TIMEOUT (uint32_t)1000
bogdanm 0:9b334a45a8ff 128
bogdanm 0:9b334a45a8ff 129 /**
bogdanm 0:9b334a45a8ff 130 * @}
bogdanm 0:9b334a45a8ff 131 */
bogdanm 0:9b334a45a8ff 132 /* Private macro -------------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 133 /* Private variables ---------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 134 /* Private function prototypes -----------------------------------------------*/
bogdanm 0:9b334a45a8ff 135 /* Exported functions --------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 136
bogdanm 0:9b334a45a8ff 137 /** @defgroup IWDG_Exported_Functions IWDG Exported Functions
bogdanm 0:9b334a45a8ff 138 * @{
bogdanm 0:9b334a45a8ff 139 */
bogdanm 0:9b334a45a8ff 140
bogdanm 0:9b334a45a8ff 141 /** @defgroup IWDG_Exported_Functions_Group1 Initialization and de-initialization functions
bogdanm 0:9b334a45a8ff 142 * @brief Initialization and Configuration functions.
bogdanm 0:9b334a45a8ff 143 *
bogdanm 0:9b334a45a8ff 144 @verbatim
bogdanm 0:9b334a45a8ff 145 ===============================================================================
bogdanm 0:9b334a45a8ff 146 ##### Initialization and de-initialization functions #####
bogdanm 0:9b334a45a8ff 147 ===============================================================================
bogdanm 0:9b334a45a8ff 148 [..] This section provides functions allowing to:
bogdanm 0:9b334a45a8ff 149 (+) Initialize the IWDG according to the specified parameters
bogdanm 0:9b334a45a8ff 150 in the IWDG_InitTypeDef and create the associated handle
bogdanm 0:9b334a45a8ff 151 (+) Manage Window option
bogdanm 0:9b334a45a8ff 152 (+) Initialize the IWDG MSP
bogdanm 0:9b334a45a8ff 153 (+) DeInitialize the IWDG MSP
bogdanm 0:9b334a45a8ff 154
bogdanm 0:9b334a45a8ff 155 @endverbatim
bogdanm 0:9b334a45a8ff 156 * @{
bogdanm 0:9b334a45a8ff 157 */
bogdanm 0:9b334a45a8ff 158
bogdanm 0:9b334a45a8ff 159 /**
bogdanm 0:9b334a45a8ff 160 * @brief Initialize the IWDG according to the specified
bogdanm 0:9b334a45a8ff 161 * parameters in the IWDG_InitTypeDef and initialize the associated handle.
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 HAL_StatusTypeDef HAL_IWDG_Init(IWDG_HandleTypeDef *hiwdg)
bogdanm 0:9b334a45a8ff 167 {
bogdanm 0:9b334a45a8ff 168 uint32_t tickstart = 0;
bogdanm 0:9b334a45a8ff 169
bogdanm 0:9b334a45a8ff 170 /* Check the IWDG handle allocation */
bogdanm 0:9b334a45a8ff 171 if(hiwdg == NULL)
bogdanm 0:9b334a45a8ff 172 {
bogdanm 0:9b334a45a8ff 173 return HAL_ERROR;
bogdanm 0:9b334a45a8ff 174 }
bogdanm 0:9b334a45a8ff 175
bogdanm 0:9b334a45a8ff 176 /* Check the parameters */
bogdanm 0:9b334a45a8ff 177 assert_param(IS_IWDG_ALL_INSTANCE(hiwdg->Instance));
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((__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_PVU) != RESET)
bogdanm 0:9b334a45a8ff 184 &&(__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_RVU) != RESET)
bogdanm 0:9b334a45a8ff 185 &&(__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_WVU) != RESET))
bogdanm 0:9b334a45a8ff 186 {
bogdanm 0:9b334a45a8ff 187 return HAL_ERROR;
bogdanm 0:9b334a45a8ff 188 }
bogdanm 0:9b334a45a8ff 189
bogdanm 0:9b334a45a8ff 190 if(hiwdg->State == HAL_IWDG_STATE_RESET)
bogdanm 0:9b334a45a8ff 191 {
bogdanm 0:9b334a45a8ff 192 /* Allocate lock resource and initialize it */
bogdanm 0:9b334a45a8ff 193 hiwdg->Lock = HAL_UNLOCKED;
bogdanm 0:9b334a45a8ff 194
bogdanm 0:9b334a45a8ff 195 /* Init the low level hardware */
bogdanm 0:9b334a45a8ff 196 HAL_IWDG_MspInit(hiwdg);
bogdanm 0:9b334a45a8ff 197 }
bogdanm 0:9b334a45a8ff 198
bogdanm 0:9b334a45a8ff 199 /* Change IWDG peripheral state */
bogdanm 0:9b334a45a8ff 200 hiwdg->State = HAL_IWDG_STATE_BUSY;
bogdanm 0:9b334a45a8ff 201
bogdanm 0:9b334a45a8ff 202 /* Enable write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers */
bogdanm 0:9b334a45a8ff 203 /* by writing 0x5555 in KR */
bogdanm 0:9b334a45a8ff 204 IWDG_ENABLE_WRITE_ACCESS(hiwdg);
bogdanm 0:9b334a45a8ff 205
bogdanm 0:9b334a45a8ff 206 /* Write to IWDG registers the IWDG_Prescaler & IWDG_Reload values to work with */
bogdanm 0:9b334a45a8ff 207 MODIFY_REG(hiwdg->Instance->PR, IWDG_PR_PR, hiwdg->Init.Prescaler);
bogdanm 0:9b334a45a8ff 208 MODIFY_REG(hiwdg->Instance->RLR, IWDG_RLR_RL, hiwdg->Init.Reload);
bogdanm 0:9b334a45a8ff 209
bogdanm 0:9b334a45a8ff 210 /* check if window option is enabled */
bogdanm 0:9b334a45a8ff 211 if (((hiwdg->Init.Window) != IWDG_WINDOW_DISABLE) || ((hiwdg->Instance->WINR) != IWDG_WINDOW_DISABLE))
bogdanm 0:9b334a45a8ff 212 {
bogdanm 0:9b334a45a8ff 213 tickstart = HAL_GetTick();
bogdanm 0:9b334a45a8ff 214
bogdanm 0:9b334a45a8ff 215 /* Wait for register to be updated */
bogdanm 0:9b334a45a8ff 216 while((uint32_t)(hiwdg->Instance->SR) != RESET)
bogdanm 0:9b334a45a8ff 217 {
bogdanm 0:9b334a45a8ff 218 if((HAL_GetTick() - tickstart ) > HAL_IWDG_DEFAULT_TIMEOUT)
bogdanm 0:9b334a45a8ff 219 {
bogdanm 0:9b334a45a8ff 220 /* Set IWDG state */
bogdanm 0:9b334a45a8ff 221 hiwdg->State = HAL_IWDG_STATE_TIMEOUT;
bogdanm 0:9b334a45a8ff 222 return HAL_TIMEOUT;
bogdanm 0:9b334a45a8ff 223 }
bogdanm 0:9b334a45a8ff 224 }
bogdanm 0:9b334a45a8ff 225
bogdanm 0:9b334a45a8ff 226 /* Write to IWDG WINR the IWDG_Window value to compare with */
bogdanm 0:9b334a45a8ff 227 MODIFY_REG(hiwdg->Instance->WINR, IWDG_WINR_WIN, hiwdg->Init.Window);
bogdanm 0:9b334a45a8ff 228 }
bogdanm 0:9b334a45a8ff 229
bogdanm 0:9b334a45a8ff 230 /* Change IWDG peripheral state */
bogdanm 0:9b334a45a8ff 231 hiwdg->State = HAL_IWDG_STATE_READY;
bogdanm 0:9b334a45a8ff 232
bogdanm 0:9b334a45a8ff 233 /* Return function status */
bogdanm 0:9b334a45a8ff 234 return HAL_OK;
bogdanm 0:9b334a45a8ff 235 }
bogdanm 0:9b334a45a8ff 236
bogdanm 0:9b334a45a8ff 237 /**
bogdanm 0:9b334a45a8ff 238 * @brief Initialize the IWDG MSP.
bogdanm 0:9b334a45a8ff 239 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
bogdanm 0:9b334a45a8ff 240 * the configuration information for the specified IWDG module.
bogdanm 0:9b334a45a8ff 241 * @retval None
bogdanm 0:9b334a45a8ff 242 */
bogdanm 0:9b334a45a8ff 243 __weak void HAL_IWDG_MspInit(IWDG_HandleTypeDef *hiwdg)
bogdanm 0:9b334a45a8ff 244 {
bogdanm 0:9b334a45a8ff 245 /* NOTE : This function should not be modified, when the callback is needed,
bogdanm 0:9b334a45a8ff 246 the HAL_IWDG_MspInit could be implemented in the user file
bogdanm 0:9b334a45a8ff 247 */
bogdanm 0:9b334a45a8ff 248 }
bogdanm 0:9b334a45a8ff 249
bogdanm 0:9b334a45a8ff 250 /**
bogdanm 0:9b334a45a8ff 251 * @}
bogdanm 0:9b334a45a8ff 252 */
bogdanm 0:9b334a45a8ff 253
bogdanm 0:9b334a45a8ff 254 /** @defgroup IWDG_Exported_Functions_Group2 IO operation functions
bogdanm 0:9b334a45a8ff 255 * @brief IO operation functions
bogdanm 0:9b334a45a8ff 256 *
bogdanm 0:9b334a45a8ff 257 @verbatim
bogdanm 0:9b334a45a8ff 258 ===============================================================================
bogdanm 0:9b334a45a8ff 259 ##### IO operation functions #####
bogdanm 0:9b334a45a8ff 260 ===============================================================================
bogdanm 0:9b334a45a8ff 261 [..] This section provides functions allowing to:
bogdanm 0:9b334a45a8ff 262 (+) Start the IWDG.
bogdanm 0:9b334a45a8ff 263 (+) Refresh the IWDG.
bogdanm 0:9b334a45a8ff 264
bogdanm 0:9b334a45a8ff 265 @endverbatim
bogdanm 0:9b334a45a8ff 266 * @{
bogdanm 0:9b334a45a8ff 267 */
bogdanm 0:9b334a45a8ff 268
bogdanm 0:9b334a45a8ff 269 /**
bogdanm 0:9b334a45a8ff 270 * @brief Start the IWDG.
bogdanm 0:9b334a45a8ff 271 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
bogdanm 0:9b334a45a8ff 272 * the configuration information for the specified IWDG module.
bogdanm 0:9b334a45a8ff 273 * @retval HAL status
bogdanm 0:9b334a45a8ff 274 */
bogdanm 0:9b334a45a8ff 275 HAL_StatusTypeDef HAL_IWDG_Start(IWDG_HandleTypeDef *hiwdg)
bogdanm 0:9b334a45a8ff 276 {
bogdanm 0:9b334a45a8ff 277 uint32_t tickstart = 0;
bogdanm 0:9b334a45a8ff 278
bogdanm 0:9b334a45a8ff 279 /* Process locked */
bogdanm 0:9b334a45a8ff 280 __HAL_LOCK(hiwdg);
bogdanm 0:9b334a45a8ff 281
bogdanm 0:9b334a45a8ff 282 /* Change IWDG peripheral state */
bogdanm 0:9b334a45a8ff 283 hiwdg->State = HAL_IWDG_STATE_BUSY;
bogdanm 0:9b334a45a8ff 284
bogdanm 0:9b334a45a8ff 285 /* Reload IWDG counter with value defined in the RLR register */
bogdanm 0:9b334a45a8ff 286 if ((hiwdg->Init.Window) == IWDG_WINDOW_DISABLE)
bogdanm 0:9b334a45a8ff 287 {
bogdanm 0:9b334a45a8ff 288 __HAL_IWDG_RELOAD_COUNTER(hiwdg);
bogdanm 0:9b334a45a8ff 289 }
bogdanm 0:9b334a45a8ff 290
bogdanm 0:9b334a45a8ff 291 /* Start the IWDG peripheral */
bogdanm 0:9b334a45a8ff 292 __HAL_IWDG_START(hiwdg);
bogdanm 0:9b334a45a8ff 293
bogdanm 0:9b334a45a8ff 294 tickstart = HAL_GetTick();
bogdanm 0:9b334a45a8ff 295
bogdanm 0:9b334a45a8ff 296 /* Wait until PVU, RVU, WVU flag are RESET */
bogdanm 0:9b334a45a8ff 297 while( (__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_PVU) != RESET)
bogdanm 0:9b334a45a8ff 298 &&(__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_RVU) != RESET)
bogdanm 0:9b334a45a8ff 299 &&(__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_WVU) != RESET) )
bogdanm 0:9b334a45a8ff 300 {
bogdanm 0:9b334a45a8ff 301
bogdanm 0:9b334a45a8ff 302 if((HAL_GetTick() - tickstart ) > HAL_IWDG_DEFAULT_TIMEOUT)
bogdanm 0:9b334a45a8ff 303 {
bogdanm 0:9b334a45a8ff 304 /* Set IWDG state */
bogdanm 0:9b334a45a8ff 305 hiwdg->State = HAL_IWDG_STATE_TIMEOUT;
bogdanm 0:9b334a45a8ff 306
bogdanm 0:9b334a45a8ff 307 /* Process unlocked */
bogdanm 0:9b334a45a8ff 308 __HAL_UNLOCK(hiwdg);
bogdanm 0:9b334a45a8ff 309
bogdanm 0:9b334a45a8ff 310 return HAL_TIMEOUT;
bogdanm 0:9b334a45a8ff 311 }
bogdanm 0:9b334a45a8ff 312 }
bogdanm 0:9b334a45a8ff 313
bogdanm 0:9b334a45a8ff 314 /* Change IWDG peripheral state */
bogdanm 0:9b334a45a8ff 315 hiwdg->State = HAL_IWDG_STATE_READY;
bogdanm 0:9b334a45a8ff 316
bogdanm 0:9b334a45a8ff 317 /* Process Unlocked */
bogdanm 0:9b334a45a8ff 318 __HAL_UNLOCK(hiwdg);
bogdanm 0:9b334a45a8ff 319
bogdanm 0:9b334a45a8ff 320 /* Return function status */
bogdanm 0:9b334a45a8ff 321 return HAL_OK;
bogdanm 0:9b334a45a8ff 322 }
bogdanm 0:9b334a45a8ff 323
bogdanm 0:9b334a45a8ff 324 /**
bogdanm 0:9b334a45a8ff 325 * @brief Refresh the IWDG.
bogdanm 0:9b334a45a8ff 326 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
bogdanm 0:9b334a45a8ff 327 * the configuration information for the specified IWDG module.
bogdanm 0:9b334a45a8ff 328 * @retval HAL status
bogdanm 0:9b334a45a8ff 329 */
bogdanm 0:9b334a45a8ff 330 HAL_StatusTypeDef HAL_IWDG_Refresh(IWDG_HandleTypeDef *hiwdg)
bogdanm 0:9b334a45a8ff 331 {
bogdanm 0:9b334a45a8ff 332 uint32_t tickstart = 0;
bogdanm 0:9b334a45a8ff 333
bogdanm 0:9b334a45a8ff 334 /* Process Locked */
bogdanm 0:9b334a45a8ff 335 __HAL_LOCK(hiwdg);
bogdanm 0:9b334a45a8ff 336
bogdanm 0:9b334a45a8ff 337 /* Change IWDG peripheral state */
bogdanm 0:9b334a45a8ff 338 hiwdg->State = HAL_IWDG_STATE_BUSY;
bogdanm 0:9b334a45a8ff 339
bogdanm 0:9b334a45a8ff 340 tickstart = HAL_GetTick();
bogdanm 0:9b334a45a8ff 341
bogdanm 0:9b334a45a8ff 342 /* Wait until RVU flag is RESET */
bogdanm 0:9b334a45a8ff 343 while(__HAL_IWDG_GET_FLAG(hiwdg, IWDG_FLAG_RVU) != RESET)
bogdanm 0:9b334a45a8ff 344 {
bogdanm 0:9b334a45a8ff 345 if((HAL_GetTick() - tickstart ) > HAL_IWDG_DEFAULT_TIMEOUT)
bogdanm 0:9b334a45a8ff 346 {
bogdanm 0:9b334a45a8ff 347 /* Set IWDG state */
bogdanm 0:9b334a45a8ff 348 hiwdg->State = HAL_IWDG_STATE_TIMEOUT;
bogdanm 0:9b334a45a8ff 349
bogdanm 0:9b334a45a8ff 350 /* Process unlocked */
bogdanm 0:9b334a45a8ff 351 __HAL_UNLOCK(hiwdg);
bogdanm 0:9b334a45a8ff 352
bogdanm 0:9b334a45a8ff 353 return HAL_TIMEOUT;
bogdanm 0:9b334a45a8ff 354 }
bogdanm 0:9b334a45a8ff 355 }
bogdanm 0:9b334a45a8ff 356
bogdanm 0:9b334a45a8ff 357 /* Reload IWDG counter with value defined in the reload register */
bogdanm 0:9b334a45a8ff 358 __HAL_IWDG_RELOAD_COUNTER(hiwdg);
bogdanm 0:9b334a45a8ff 359
bogdanm 0:9b334a45a8ff 360 /* Change IWDG peripheral state */
bogdanm 0:9b334a45a8ff 361 hiwdg->State = HAL_IWDG_STATE_READY;
bogdanm 0:9b334a45a8ff 362
bogdanm 0:9b334a45a8ff 363 /* Process Unlocked */
bogdanm 0:9b334a45a8ff 364 __HAL_UNLOCK(hiwdg);
bogdanm 0:9b334a45a8ff 365
bogdanm 0:9b334a45a8ff 366 /* Return function status */
bogdanm 0:9b334a45a8ff 367 return HAL_OK;
bogdanm 0:9b334a45a8ff 368 }
bogdanm 0:9b334a45a8ff 369
bogdanm 0:9b334a45a8ff 370 /**
bogdanm 0:9b334a45a8ff 371 * @}
bogdanm 0:9b334a45a8ff 372 */
bogdanm 0:9b334a45a8ff 373
bogdanm 0:9b334a45a8ff 374 /** @defgroup IWDG_Exported_Functions_Group3 Peripheral State functions
bogdanm 0:9b334a45a8ff 375 * @brief Peripheral State functions.
bogdanm 0:9b334a45a8ff 376 *
bogdanm 0:9b334a45a8ff 377 @verbatim
bogdanm 0:9b334a45a8ff 378 ===============================================================================
bogdanm 0:9b334a45a8ff 379 ##### Peripheral State functions #####
bogdanm 0:9b334a45a8ff 380 ===============================================================================
bogdanm 0:9b334a45a8ff 381 [..]
bogdanm 0:9b334a45a8ff 382 This subsection permits to get in run-time the status of the peripheral.
bogdanm 0:9b334a45a8ff 383
bogdanm 0:9b334a45a8ff 384 @endverbatim
bogdanm 0:9b334a45a8ff 385 * @{
bogdanm 0:9b334a45a8ff 386 */
bogdanm 0:9b334a45a8ff 387
bogdanm 0:9b334a45a8ff 388 /**
bogdanm 0:9b334a45a8ff 389 * @brief Return the IWDG handle state.
bogdanm 0:9b334a45a8ff 390 * @param hiwdg: pointer to a IWDG_HandleTypeDef structure that contains
bogdanm 0:9b334a45a8ff 391 * the configuration information for the specified IWDG module.
bogdanm 0:9b334a45a8ff 392 * @retval HAL state
bogdanm 0:9b334a45a8ff 393 */
bogdanm 0:9b334a45a8ff 394 HAL_IWDG_StateTypeDef HAL_IWDG_GetState(IWDG_HandleTypeDef *hiwdg)
bogdanm 0:9b334a45a8ff 395 {
bogdanm 0:9b334a45a8ff 396 /* Return IWDG handle state */
bogdanm 0:9b334a45a8ff 397 return hiwdg->State;
bogdanm 0:9b334a45a8ff 398 }
bogdanm 0:9b334a45a8ff 399
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 #endif /* HAL_IWDG_MODULE_ENABLED */
bogdanm 0:9b334a45a8ff 409 /**
bogdanm 0:9b334a45a8ff 410 * @}
bogdanm 0:9b334a45a8ff 411 */
bogdanm 0:9b334a45a8ff 412
bogdanm 0:9b334a45a8ff 413 /**
bogdanm 0:9b334a45a8ff 414 * @}
bogdanm 0:9b334a45a8ff 415 */
bogdanm 0:9b334a45a8ff 416
bogdanm 0:9b334a45a8ff 417 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/