【STM32】中断相关函数和类型嵌入式天地

00. 目录
01. 概述
02. 相关类型
03. 相关函数
04. 附录
05. 声明

01. 概述中断相关代码主要分布在固件库的 stm32f4xx_exti.h 和 stm32f4xx_exti.c 文件中。
02. 相关类型 EXTI模式枚举

/** * @briefEXTI mode enumeration */typedef enum { EXTI_Mode_Interrupt = 0x00, EXTI_Mode_Event = 0x04 }EXTIMode_TypeDef; #define IS_EXTI_MODE(MODE) (((MODE) == EXTI_Mode_Interrupt) || ((MODE) == EXTI_Mode_Event))

EXTI触发枚举

/** * @briefEXTI Trigger enumeration */typedef enum { EXTI_Trigger_Rising = 0x08, //上升沿 EXTI_Trigger_Falling = 0x0C,//下降沿 EXTI_Trigger_Rising_Falling = 0x10 //边沿触发 }EXTITrigger_TypeDef; #define IS_EXTI_TRIGGER(TRIGGER) (((TRIGGER) == EXTI_Trigger_Rising) || \ ((TRIGGER) == EXTI_Trigger_Falling) || \ ((TRIGGER) == EXTI_Trigger_Rising_Falling))

EXTI初始化结构体

/** * @briefEXTI Init Structure definition */typedef struct { uint32_t EXTI_Line; /*!< Specifies the EXTI lines to be enabled or disabled. This parameter can be any combination value of @ref EXTI_Lines */EXTIMode_TypeDef EXTI_Mode; /*!< Specifies the mode for the EXTI lines. This parameter can be a value of @ref EXTIMode_TypeDef */EXTITrigger_TypeDef EXTI_Trigger; /*!< Specifies the trigger signal active edge for the EXTI lines. This parameter can be a value of @ref EXTITrigger_TypeDef */FunctionalState EXTI_LineCmd; /*!< Specifies the new state of the selected EXTI lines. This parameter can be set either to ENABLE or DISABLE */ }EXTI_InitTypeDef;

外部中断线

/** @defgroup EXTI_Lines * @{ */#define EXTI_Line0((uint32_t)0x00001)/*!< External interrupt line 0 */ #define EXTI_Line1((uint32_t)0x00002)/*!< External interrupt line 1 */ #define EXTI_Line2((uint32_t)0x00004)/*!< External interrupt line 2 */ #define EXTI_Line3((uint32_t)0x00008)/*!< External interrupt line 3 */ #define EXTI_Line4((uint32_t)0x00010)/*!< External interrupt line 4 */ #define EXTI_Line5((uint32_t)0x00020)/*!< External interrupt line 5 */ #define EXTI_Line6((uint32_t)0x00040)/*!< External interrupt line 6 */ #define EXTI_Line7((uint32_t)0x00080)/*!< External interrupt line 7 */ #define EXTI_Line8((uint32_t)0x00100)/*!< External interrupt line 8 */ #define EXTI_Line9((uint32_t)0x00200)/*!< External interrupt line 9 */ #define EXTI_Line10((uint32_t)0x00400)/*!< External interrupt line 10 */ #define EXTI_Line11((uint32_t)0x00800)/*!< External interrupt line 11 */ #define EXTI_Line12((uint32_t)0x01000)/*!< External interrupt line 12 */ #define EXTI_Line13((uint32_t)0x02000)/*!< External interrupt line 13 */ #define EXTI_Line14((uint32_t)0x04000)/*!< External interrupt line 14 */ #define EXTI_Line15((uint32_t)0x08000)/*!< External interrupt line 15 */ #define EXTI_Line16((uint32_t)0x10000)/*!< External interrupt line 16 Connected to the PVD Output */ #define EXTI_Line17((uint32_t)0x20000)/*!< External interrupt line 17 Connected to the RTC Alarm event */ #define EXTI_Line18((uint32_t)0x40000)/*!< External interrupt line 18 Connected to the USB OTG FS Wakeup from suspend event */ #define EXTI_Line19((uint32_t)0x80000)/*!< External interrupt line 19 Connected to the Ethernet Wakeup event */ #define EXTI_Line20((uint32_t)0x00100000)/*!< External interrupt line 20 Connected to the USB OTG HS (configured in FS) Wakeup event*/ #define EXTI_Line21((uint32_t)0x00200000)/*!< External interrupt line 21 Connected to the RTC Tamper and Time Stamp events */ #define EXTI_Line22((uint32_t)0x00400000)/*!< External interrupt line 22 Connected to the RTC Wakeup event */ #define EXTI_Line23((uint32_t)0x00800000)/*!< External interrupt line 23 Connected to the LPTIM Wakeup event */#define IS_EXTI_LINE(LINE) ((((LINE) & (uint32_t)0xFF800000) == 0x00) && ((LINE) != (uint16_t)0x00))#define IS_GET_EXTI_LINE(LINE) (((LINE) == EXTI_Line0) || ((LINE) == EXTI_Line1) || \ ((LINE) == EXTI_Line2) || ((LINE) == EXTI_Line3) || \ ((LINE) == EXTI_Line4) || ((LINE) == EXTI_Line5) || \ ((LINE) == EXTI_Line6) || ((LINE) == EXTI_Line7) || \ ((LINE) == EXTI_Line8) || ((LINE) == EXTI_Line9) || \ ((LINE) == EXTI_Line10) || ((LINE) == EXTI_Line11) || \ ((LINE) == EXTI_Line12) || ((LINE) == EXTI_Line13) || \ ((LINE) == EXTI_Line14) || ((LINE) == EXTI_Line15) || \ ((LINE) == EXTI_Line16) || ((LINE) == EXTI_Line17) || \ ((LINE) == EXTI_Line18) || ((LINE) == EXTI_Line19) || \ ((LINE) == EXTI_Line20) || ((LINE) == EXTI_Line21) ||\ ((LINE) == EXTI_Line22) || ((LINE) == EXTI_Line23))

03. 相关函数

/* Exported macro ------------------------------------------------------------*/ /* Exported functions --------------------------------------------------------*//*Function used to set the EXTI configuration to the default reset state *****/ void EXTI_DeInit(void); /* Initialization and Configuration functions *********************************/ void EXTI_Init(EXTI_InitTypeDef* EXTI_InitStruct); void EXTI_StructInit(EXTI_InitTypeDef* EXTI_InitStruct); void EXTI_GenerateSWInterrupt(uint32_t EXTI_Line); /* Interrupts and flags management functions **********************************/ FlagStatus EXTI_GetFlagStatus(uint32_t EXTI_Line); void EXTI_ClearFlag(uint32_t EXTI_Line); ITStatus EXTI_GetITStatus(uint32_t EXTI_Line); void EXTI_ClearITPendingBit(uint32_t EXTI_Line);

04. 附录 4.1 【STM32】STM32系列教程汇总
【【STM32】中断相关函数和类型】网址：【STM32】STM32系列教程汇总
05. 声明