新手上路
- 积分
- 44
- 金钱
- 44
- 注册时间
- 2018-5-5
- 在线时间
- 8 小时
|
1金钱
main函数里面定义全局变量
volatile u16 data[5]={0x04};
中断服务函数
#include "stm32f10x.h"
#include "exti.h"
#include "LED.h"
//外部中断2服务程序
extern u16 data[5]; //全局变量
static void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
/*设置NVIC中断分组1: 1位抢占优先级,3位响应优先级*/
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;
/*设置抢占优先级,抢占优先级设为2*/
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x01;
/*设置子优先级,子优先级设为1*/
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x00;
/*使能外部中断通*/
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
/*根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器*/
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = EXTI1_IRQn;
/*设置抢占优先级,抢占优先级设为2*/
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x01;
/*设置子优先级,子优先级设为1*/
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x01;
/*使能外部中断通*/
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
/*根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器*/
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = EXTI2_IRQn;
/*设置抢占优先级,抢占优先级设为2*/
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x01;
/*设置子优先级,子优先级设为1*/
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x02;
/*使能外部中断通*/
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
/*根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器*/
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = EXTI3_IRQn;
/*设置抢占优先级,抢占优先级设为2*/
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x01;
/*设置子优先级,子优先级设为1*/
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x03;
/*使能外部中断通*/
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
/*根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器*/
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = EXTI4_IRQn;
/*设置抢占优先级,抢占优先级设为2*/
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x01;
/*设置子优先级,子优先级设为1*/
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x04;
/*使能外部中断通*/
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
/*根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器*/
NVIC_Init(&NVIC_InitStructure);
}
void EXTI_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
/*开启外设时钟*/
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC | RCC_APB2Periph_AFIO,ENABLE);
/*初始化 设置为浮空输入*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_4;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure);
//中断线设置
GPIO_EXTILineConfig(GPIO_PortSourceGPIOC,GPIO_PinSource0);//中断线0
GPIO_EXTILineConfig(GPIO_PortSourceGPIOC,GPIO_PinSource1);//中断线1
GPIO_EXTILineConfig(GPIO_PortSourceGPIOC,GPIO_PinSource2);//中断线2
GPIO_EXTILineConfig(GPIO_PortSourceGPIOC,GPIO_PinSource3);//中断线3
GPIO_EXTILineConfig(GPIO_PortSourceGPIOC,GPIO_PinSource4);//中断线4
EXTI_InitStructure.EXTI_Line=EXTI_Line0 | EXTI_Line1 | EXTI_Line2 | EXTI_Line3| EXTI_Line4;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
/*配置中断控制器NVIC*/
NVIC_Configuration();
}
EXTI_InitTypeDef EXTI_InitStructure;
void EXTI0_IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line0) != RESET)
{
EXTI_InitStructure.EXTI_LineCmd = DISABLE;
EXTI_Init(&EXTI_InitStructure);
data[0]=GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_0);
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
}
EXTI_ClearITPendingBit(EXTI_Line0); //清除LINE0上的中断标志位
}
void EXTI1_IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line1) != RESET)
{
EXTI_InitStructure.EXTI_LineCmd = DISABLE;
EXTI_Init(&EXTI_InitStructure);
data[1]=GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_1);
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
}
EXTI_ClearITPendingBit(EXTI_Line1); //清除LINE1上的中断标志位
}
void EXTI2_IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line1) != RESET)
{
EXTI_InitStructure.EXTI_LineCmd = DISABLE;
EXTI_Init(&EXTI_InitStructure);
data[2]=GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_2);
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
}
EXTI_ClearITPendingBit(EXTI_Line5); //清除LINE2上的中断标志位
}
void EXTI3_IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line3) != RESET)
{
EXTI_InitStructure.EXTI_LineCmd = DISABLE;
EXTI_Init(&EXTI_InitStructure);
data[3]=GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_3);
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
}
EXTI_ClearITPendingBit(EXTI_Line3); //清除LINE3上的中断标志位
}
void EXTI4_IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line4) != RESET)
{
EXTI_InitStructure.EXTI_LineCmd = DISABLE;
EXTI_Init(&EXTI_InitStructure);
data[4]=GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_4);
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
}
EXTI_ClearITPendingBit(EXTI_Line4); //清除LINE4上的中断标志位
}
line2的中断感觉触发不了,而且程序有点跑偏的感觉
|
|