stm32g4xx_ll_iwdg.h

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00001 /**
00002   ******************************************************************************
00003   * @file    stm32g4xx_ll_iwdg.h
00004   * @author  MCD Application Team
00005   * @brief   Header file of IWDG LL module.
00006   ******************************************************************************
00007   * @attention
00008   *
00009   * Copyright (c) 2019 STMicroelectronics.
00010   * All rights reserved.
00011   *
00012   * This software is licensed under terms that can be found in the LICENSE file
00013   * in the root directory of this software component.
00014   * If no LICENSE file comes with this software, it is provided AS-IS.
00015   *
00016   ******************************************************************************
00017   */
00018
00019 /* Define to prevent recursive inclusion -------------------------------------*/
00020 #ifndef STM32G4xx_LL_IWDG_H
00021 #define STM32G4xx_LL_IWDG_H
00022 
00023 #ifdef __cplusplus
00024 extern "C" {
00025 #endif
00026 
00027 /* Includes ------------------------------------------------------------------*/
00028 #include "stm32g4xx.h"
00029 
00030 /** @addtogroup STM32G4xx_LL_Driver
00031   * @{
00032   */
00033
00034 #if defined(IWDG)
00035 
00036 /** @defgroup IWDG_LL IWDG
00037   * @{
00038   */
00039
00040 /* Private types -------------------------------------------------------------*/
00041 /* Private variables ---------------------------------------------------------*/
00042
00043 /* Private constants ---------------------------------------------------------*/
00044 /** @defgroup IWDG_LL_Private_Constants IWDG Private Constants
00045   * @{
00046   */
00047 #define LL_IWDG_KEY_RELOAD                 0x00AAAAU               /*!< IWDG Reload Counter Enable   */
00048 #define LL_IWDG_KEY_ENABLE                 0x00CCCCU               /*!< IWDG Peripheral Enable       */
00049 #define LL_IWDG_KEY_WR_ACCESS_ENABLE       0x00d555U               /*!< IWDG KR Write Access Enable  */
00050 #define LL_IWDG_KEY_WR_ACCESS_DISABLE      0x0000000U               /*!< IWDG KR Write Access Disable */
00051 /**
00052   * @}
00053   */
00054
00055 /* Private macros ------------------------------------------------------------*/
00056
00057 /* Exported types ------------------------------------------------------------*/
00058 /* Exported constants --------------------------------------------------------*/
00059 /** @defgroup IWDG_LL_Exported_Constants IWDG Exported Constants
00060   * @{
00061   */
00062 
00063 /** @defgroup IWDG_LL_EC_GET_FLAG Get Flags Defines
00064   * @brief    Flags defines which can be used with LL_IWDG_ReadReg function
00065   * @{
00066   */
00067 #define LL_IWDG_SR_PVU                     IWDG_SR_PVU                           /*!< 看门狗预分频器值更新 */
00068 #define LL_IWDG_SR_RVU                     IWDG_SR_RVU                           /*!< 看门狗计数器重新加载值更新 */
00069 #define LL_IWDG_SR_WVU                     IWDG_SR_WVU                           /*!< 看门狗计数器窗口值更新 */
00070 /**
00071   * @}
00072   */
00073 
00074 /** @defgroup IWDG_LL_EC_PRESCALER  Prescaler Divider
00075   * @{
00076   */
00077 #define LL_IWDG_PRESCALER_4                0x000000U                           /*!< 4分频   */
00078 #define LL_IWDG_PRESCALER_8                (IWDG_PR_PR_0)                        /*!< 8分频   */
00079 #define LL_IWDG_PRESCALER_16               (IWDG_PR_PR_1)                        /*!< 16分频  */
00080 #define LL_IWDG_PRESCALER_32               (IWDG_PR_PR_1 | IWDG_PR_PR_0)         /*!< 32分频  */
00081 #define LL_IWDG_PRESCALER_64               (IWDG_PR_PR_2)                        /*!< 64分频  */
00082 #define LL_IWDG_PRESCALER_128              (IWDG_PR_PR_2 | IWDG_PR_PR_0)         /*!< 128分频 */
00083 #define LL_IWDG_PRESCALER_256              (IWDG_PR_PR_2 | IWDG_PR_PR_1)         /*!< 256分频 */
00084 /**
00085   * @}
00086   */
00087 
00088 /**
00089   * @}
00090   */
00091
00092 /* Exported macro ------------------------------------------------------------*/
00093 /** @defgroup IWDG_LL_Exported_Macros IWDG Exported Macros
00094   * @{
00095   */
00096 
00097 /** @defgroup IWDG_LL_EM_WRITE_READ Common Write and read registers Macros
00098   * @{
00099   */
00100 
00101 /**
00102   * @brief  向IWDG寄存器写入值
00103   * @param  __INSTANCE__ IWDG Instance
00104   * @param  __REG__ Register to be written
00105   * @param  __VALUE__ Value to be written in the register
00106   * @retval None
00107   */
00108 #define LL_IWDG_WriteReg(__INSTANCE__, __REG__, __VALUE__) WRITE_REG(__INSTANCE__->__REG__, (__VALUE__))
00109 
00110 /**
00111   * @brief  读取IWDG寄存器中的值
00112   * @param  __INSTANCE__ IWDG Instance
00113   * @param  __REG__ Register to be read
00114   * @retval 寄存器值
00115   */
00116 #define LL_IWDG_ReadReg(__INSTANCE__, __REG__) READ_REG(__INSTANCE__->__REG__)
00117 /**
00118   * @}
00119   */
00120 
00121 /**
00122   * @}
00123   */
00124
00125
00126 /* Exported functions --------------------------------------------------------*/
00127 /** @defgroup IWDG_LL_Exported_Functions IWDG Exported Functions
00128   * @{
00129   */
00130 /** @defgroup IWDG_LL_EF_Configuration Configuration
00131   * @{
00132   */
00133 
00134 /**
00135   * @brief  启动独立看门狗
00136   * @note   Except if the hardware watchdog option is selected
00137   * @rmtoll KR           KEY           LL_IWDG_Enable
00138   * @param  IWDGx IWDG Instance
00139   * @retval None
00140   */
00141 __STATIC_INLINE void LL_IWDG_Enable(IWDG_TypeDef *IWDGx)
00142 {
00143   WRITE_REG(IWDGx->KR,