原创 STM32 学习笔记之外部中断的初步了解之二

分享一下中断程序：

void EXTIX_Init(void)

{

GPIO_InitTypeDef   GPIO_InitStructure;   //定义端口结构初始化

EXTI_InitTypeDef   EXTI_InitStructure;   //定义中断结构初始化

NVIC_InitTypeDef   NVIC_InitStructure; //定义中断优先级结构初始化

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOC|RCC_APB2Periph_AFIO,ENABLE);

GPIO_PinRemapConfig(GPIO_Remap_SWJ_Disable, ENABLE);     //改变指定管脚的映射 GPIO_Remap_SWJ_Disable SWJ

PIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable, ENABLE);     //改变指定管脚的映射GPIO_Remap_SWJ_JTAGDisable

//初始化KEY01-> PB5,  KEY00->PB4  设置为输出

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

GPIO_Init(GPIOB, &GPIO_InitStructure);

KEY01 = 1;

KEY00 = 0;

//初始化KEY13->PB3 设置为输入

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;

GPIO_Init(GPIOB, &GPIO_InitStructure);

//初始化KEY12->PC12, KEY11->PC11, KEY10->PC10,设置为输入

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12|GPIO_Pin_11|GPIO_Pin_10;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;

GPIO_Init(GPIOC, &GPIO_InitStructure);

GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource3);         

EXTI_InitStructure.EXTI_Line = EXTI_Line3;

EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;

EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;

EXTI_InitStructure.EXTI_LineCmd = ENABLE;

EXTI_Init(&EXTI_InitStructure);

GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource12);

GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource11);

GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource10);

EXTI_InitStructure.EXTI_Line = EXTI_Line12;

EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;

EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;

EXTI_InitStructure.EXTI_LineCmd = ENABLE;

EXTI_Init(&EXTI_InitStructure);

EXTI_InitStructure.EXTI_Line = EXTI_Line11;

EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;

EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;

EXTI_InitStructure.EXTI_LineCmd = ENABLE;

EXTI_Init(&EXTI_InitStructure);

EXTI_InitStructure.EXTI_Line = EXTI_Line10;

EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;

EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;

EXTI_InitStructure.EXTI_LineCmd = ENABLE;

EXTI_Init(&EXTI_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = EXTI3_IRQn;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x01;

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x02;

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure);

 }

void EXTI3_IRQHandler(void)

{

if(EXTI_GetITStatus(EXTI_Line3) !=RESET)

{LED4 =!LED4;}

EXTI_ClearITPendingBit(EXTI_Line3);}

void EXTI15_10_IRQHandler(void)

{

if (EXTI_GetITStatus(EXTI_Line12) !=RESET)

{LED3 =!LED3;}

else if (EXTI_GetITStatus(EXTI_Line11) !=RESET)

{LED2 =!LED2; }

else if (EXTI_GetITStatus(EXTI_Line10) !=RESET)

{LED1 =!LED1;}

EXTI_ClearITPendingBit(EXTI_Line12);      //清除EXTI线路挂起位

EXTI_ClearITPendingBit(EXTI_Line11);      //清除EXTI线路挂起位

EXTI_ClearITPendingBit(EXTI_Line10);      //清除EXTI线路挂起位}