外中断控制数码管显示_如何开放外部中断2，如何送数码管显示、

main.c:

#include "stm32f10x.h"
#include "delay.h"
#include "key.h"
#include "smg.h"
#include "sys.h"

uint16_t table[] = {0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
uint16_t dis, cnt = 0;

int main()
{
	NVIC_Configuration();
	SMG_Init();
	Key_Exti_Init();
	while(1)
	{
		dis=table[cnt%10];	
		GPIO_Write(GPIOB, dis); 
		delay(500);
	}
}


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key.h:

#ifndef __KEY_H
#define __KEY_H

#include "sys.h"


void Key_Exti_Init(void);
void EXTI9_5_IRQHandler(void);

#endif

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key.c:

#include "key.h"
#include "stm32f10x.h"
#include "delay.h"
#include "sys.h"

extern uint16_t cnt;

void Key_Exti_Init(void)
{
	//启用GPIO复用
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC | RCC_APB2Periph_AFIO, ENABLE); 

	
	GPIO_InitTypeDef GPIO_InitStructure;
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
	GPIO_Init(GPIOC, &GPIO_InitStructure); 
	
	
	GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource8); 

	
	//配置中断线
	EXTI_InitTypeDef EXTI_InitStructure;
	EXTI_InitStructure.EXTI_Line = EXTI_Line8;
	EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; //中断模式
	EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
	EXTI_InitStructure.EXTI_LineCmd = ENABLE;
	EXTI_Init(&EXTI_InitStructure); 
	
	NVIC_InitTypeDef NVIC_InitStructure;
	NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;	//抢占优先级 分组2中为0-3
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;	//响应优先级
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
	NVIC_Init(&NVIC_InitStructure); 

}

void EXTI9_5_IRQHandler()
{
	cnt ++;
}

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smg.h:

#ifndef __SMG_H
#define __SMG_H

void SMG_Init(void);//数码管IO口的初始化
#endif

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smg.c:

#include "smg.h"
#include "stm32f10x.h"

void SMG_Init(void)
{
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB    , ENABLE); //启动GBIOC的时钟
	
	GPIO_InitTypeDef GPIO_InitStructure;
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //配置为推挽输出
	GPIO_Init(GPIOB, &GPIO_InitStructure); 	
}

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