00. 目录

文章目录

• 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

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

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

typedef struct
{
  uint32_t EXTI_Line;               
   
  EXTIMode_TypeDef EXTI_Mode;       

  EXTITrigger_TypeDef EXTI_Trigger; 

  FunctionalState EXTI_LineCmd;      
}EXTI_InitTypeDef;

外部中断线

#define EXTI_Line0 ((uint32_t)0x00001) 
#define EXTI_Line1 ((uint32_t)0x00002) 
#define EXTI_Line2 ((uint32_t)0x00004) 
#define EXTI_Line3 ((uint32_t)0x00008) 
#define EXTI_Line4 ((uint32_t)0x00010) 
#define EXTI_Line5 ((uint32_t)0x00020) 
#define EXTI_Line6 ((uint32_t)0x00040) 
#define EXTI_Line7 ((uint32_t)0x00080) 
#define EXTI_Line8 ((uint32_t)0x00100) 
#define EXTI_Line9 ((uint32_t)0x00200) 
#define EXTI_Line10 ((uint32_t)0x00400) 
#define EXTI_Line11 ((uint32_t)0x00800) 
#define EXTI_Line12 ((uint32_t)0x01000) 
#define EXTI_Line13 ((uint32_t)0x02000) 
#define EXTI_Line14 ((uint32_t)0x04000) 
#define EXTI_Line15 ((uint32_t)0x08000) 
#define EXTI_Line16 ((uint32_t)0x10000) 
#define EXTI_Line17 ((uint32_t)0x20000) 
#define EXTI_Line18 ((uint32_t)0x40000)                                     
#define EXTI_Line19 ((uint32_t)0x80000) 
#define EXTI_Line20 ((uint32_t)0x00100000) 
#define EXTI_Line21 ((uint32_t)0x00200000)                                                
#define EXTI_Line22 ((uint32_t)0x00400000) 
#define EXTI_Line23 ((uint32_t)0x00800000) 

                                          
#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

void EXTI_DeInit(void);


void EXTI_Init(EXTI_InitTypeDef* EXTI_InitStruct);
void EXTI_StructInit(EXTI_InitTypeDef* EXTI_InitStruct);
void EXTI_GenerateSWInterrupt(uint32_t EXTI_Line);


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

网址：【STM32】STM32系列教程汇总

05. 声明