1 /** 2 ****************************************************************************** 3 * @file stm32l4xx_hal_iwdg.h 4 * @author MCD Application Team 5 * @brief Header file of IWDG HAL module. 6 ****************************************************************************** 7 * @attention 8 * 9 * Copyright (c) 2017 STMicroelectronics. 10 * All rights reserved. 11 * 12 * This software is licensed under terms that can be found in the LICENSE file 13 * in the root directory of this software component. 14 * If no LICENSE file comes with this software, it is provided AS-IS. 15 * 16 ****************************************************************************** 17 */ 18 19 /* Define to prevent recursive inclusion -------------------------------------*/ 20 #ifndef STM32L4xx_HAL_IWDG_H 21 #define STM32L4xx_HAL_IWDG_H 22 23 #ifdef __cplusplus 24 extern "C" { 25 #endif 26 27 /* Includes ------------------------------------------------------------------*/ 28 #include "stm32l4xx_hal_def.h" 29 30 /** @addtogroup STM32L4xx_HAL_Driver 31 * @{ 32 */ 33 34 /** @defgroup IWDG IWDG 35 * @{ 36 */ 37 38 /* Exported types ------------------------------------------------------------*/ 39 /** @defgroup IWDG_Exported_Types IWDG Exported Types 40 * @{ 41 */ 42 43 /** 44 * @brief IWDG Init structure definition 45 */ 46 typedef struct 47 { 48 uint32_t Prescaler; /*!< Select the prescaler of the IWDG. 49 This parameter can be a value of @ref IWDG_Prescaler */ 50 51 uint32_t Reload; /*!< Specifies the IWDG down-counter reload value. 52 This parameter must be a number between Min_Data = 0 and Max_Data = 0x0FFF */ 53 54 uint32_t Window; /*!< Specifies the window value to be compared to the down-counter. 55 This parameter must be a number between Min_Data = 0 and Max_Data = 0x0FFF */ 56 57 } IWDG_InitTypeDef; 58 59 /** 60 * @brief IWDG Handle Structure definition 61 */ 62 typedef struct 63 { 64 IWDG_TypeDef *Instance; /*!< Register base address */ 65 66 IWDG_InitTypeDef Init; /*!< IWDG required parameters */ 67 } IWDG_HandleTypeDef; 68 69 70 /** 71 * @} 72 */ 73 74 /* Exported constants --------------------------------------------------------*/ 75 /** @defgroup IWDG_Exported_Constants IWDG Exported Constants 76 * @{ 77 */ 78 79 /** @defgroup IWDG_Prescaler IWDG Prescaler 80 * @{ 81 */ 82 #define IWDG_PRESCALER_4 0x00000000u /*!< IWDG prescaler set to 4 */ 83 #define IWDG_PRESCALER_8 IWDG_PR_PR_0 /*!< IWDG prescaler set to 8 */ 84 #define IWDG_PRESCALER_16 IWDG_PR_PR_1 /*!< IWDG prescaler set to 16 */ 85 #define IWDG_PRESCALER_32 (IWDG_PR_PR_1 | IWDG_PR_PR_0) /*!< IWDG prescaler set to 32 */ 86 #define IWDG_PRESCALER_64 IWDG_PR_PR_2 /*!< IWDG prescaler set to 64 */ 87 #define IWDG_PRESCALER_128 (IWDG_PR_PR_2 | IWDG_PR_PR_0) /*!< IWDG prescaler set to 128 */ 88 #define IWDG_PRESCALER_256 (IWDG_PR_PR_2 | IWDG_PR_PR_1) /*!< IWDG prescaler set to 256 */ 89 /** 90 * @} 91 */ 92 93 /** @defgroup IWDG_Window_option IWDG Window option 94 * @{ 95 */ 96 #define IWDG_WINDOW_DISABLE IWDG_WINR_WIN 97 /** 98 * @} 99 */ 100 101 /** 102 * @} 103 */ 104 105 /* Exported macros -----------------------------------------------------------*/ 106 /** @defgroup IWDG_Exported_Macros IWDG Exported Macros 107 * @{ 108 */ 109 110 /** 111 * @brief Enable the IWDG peripheral. 112 * @param __HANDLE__ IWDG handle 113 * @retval None 114 */ 115 #define __HAL_IWDG_START(__HANDLE__) WRITE_REG((__HANDLE__)->Instance->KR, IWDG_KEY_ENABLE) 116 117 /** 118 * @brief Reload IWDG counter with value defined in the reload register 119 * (write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers disabled). 120 * @param __HANDLE__ IWDG handle 121 * @retval None 122 */ 123 #define __HAL_IWDG_RELOAD_COUNTER(__HANDLE__) WRITE_REG((__HANDLE__)->Instance->KR, IWDG_KEY_RELOAD) 124 125 /** 126 * @} 127 */ 128 129 /* Exported functions --------------------------------------------------------*/ 130 /** @defgroup IWDG_Exported_Functions IWDG Exported Functions 131 * @{ 132 */ 133 134 /** @defgroup IWDG_Exported_Functions_Group1 Initialization and Start functions 135 * @{ 136 */ 137 /* Initialization/Start functions ********************************************/ 138 HAL_StatusTypeDef HAL_IWDG_Init(IWDG_HandleTypeDef *hiwdg); 139 /** 140 * @} 141 */ 142 143 /** @defgroup IWDG_Exported_Functions_Group2 IO operation functions 144 * @{ 145 */ 146 /* I/O operation functions ****************************************************/ 147 HAL_StatusTypeDef HAL_IWDG_Refresh(IWDG_HandleTypeDef *hiwdg); 148 /** 149 * @} 150 */ 151 152 /** 153 * @} 154 */ 155 156 /* Private constants ---------------------------------------------------------*/ 157 /** @defgroup IWDG_Private_Constants IWDG Private Constants 158 * @{ 159 */ 160 161 /** 162 * @brief IWDG Key Register BitMask 163 */ 164 #define IWDG_KEY_RELOAD 0x0000AAAAu /*!< IWDG Reload Counter Enable */ 165 #define IWDG_KEY_ENABLE 0x0000CCCCu /*!< IWDG Peripheral Enable */ 166 #define IWDG_KEY_WRITE_ACCESS_ENABLE 0x00005555u /*!< IWDG KR Write Access Enable */ 167 #define IWDG_KEY_WRITE_ACCESS_DISABLE 0x00000000u /*!< IWDG KR Write Access Disable */ 168 169 /** 170 * @} 171 */ 172 173 /* Private macros ------------------------------------------------------------*/ 174 /** @defgroup IWDG_Private_Macros IWDG Private Macros 175 * @{ 176 */ 177 178 /** 179 * @brief Enable write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers. 180 * @param __HANDLE__ IWDG handle 181 * @retval None 182 */ 183 #define IWDG_ENABLE_WRITE_ACCESS(__HANDLE__) WRITE_REG((__HANDLE__)->Instance->KR, IWDG_KEY_WRITE_ACCESS_ENABLE) 184 185 /** 186 * @brief Disable write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers. 187 * @param __HANDLE__ IWDG handle 188 * @retval None 189 */ 190 #define IWDG_DISABLE_WRITE_ACCESS(__HANDLE__) WRITE_REG((__HANDLE__)->Instance->KR, IWDG_KEY_WRITE_ACCESS_DISABLE) 191 192 /** 193 * @brief Check IWDG prescaler value. 194 * @param __PRESCALER__ IWDG prescaler value 195 * @retval None 196 */ 197 #define IS_IWDG_PRESCALER(__PRESCALER__) (((__PRESCALER__) == IWDG_PRESCALER_4) || \ 198 ((__PRESCALER__) == IWDG_PRESCALER_8) || \ 199 ((__PRESCALER__) == IWDG_PRESCALER_16) || \ 200 ((__PRESCALER__) == IWDG_PRESCALER_32) || \ 201 ((__PRESCALER__) == IWDG_PRESCALER_64) || \ 202 ((__PRESCALER__) == IWDG_PRESCALER_128)|| \ 203 ((__PRESCALER__) == IWDG_PRESCALER_256)) 204 205 /** 206 * @brief Check IWDG reload value. 207 * @param __RELOAD__ IWDG reload value 208 * @retval None 209 */ 210 #define IS_IWDG_RELOAD(__RELOAD__) ((__RELOAD__) <= IWDG_RLR_RL) 211 212 /** 213 * @brief Check IWDG window value. 214 * @param __WINDOW__ IWDG window value 215 * @retval None 216 */ 217 #define IS_IWDG_WINDOW(__WINDOW__) ((__WINDOW__) <= IWDG_WINR_WIN) 218 219 220 /** 221 * @} 222 */ 223 224 /** 225 * @} 226 */ 227 228 /** 229 * @} 230 */ 231 232 233 #ifdef __cplusplus 234 } 235 #endif 236 237 #endif /* STM32L4xx_HAL_IWDG_H */ 238
