#include <reg52.h>
#include <intrins.h>
#define uint unsigned int
#define uchar unsigned char
#define dula P0 //段選
#define wela P2 //位選
uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x40,0x76,0x38}; //共陰極
void Timer0Init(); //定時器初始化
void display(uint first,uint second,uint third,uint forth); //顯示函數(shù)
void delay_ms(unsigned int timer); //延時函數(shù) ms
unsigned int count =0; //計數(shù)值
void main() //主函數(shù)
{
Timer0Init(); //定時器初始化
while(1)
{
display(count/1000,(count%1000)/100,(count%100)/10,count%10); //顯示函數(shù)
}
}
/********************
*函數(shù)：數(shù)碼管顯示函數(shù)
*參數(shù)：das
*返回：無
*********************/
void display(uint first,uint second,uint third,uint forth) //顯示
{
wela = 0xfe;
dula = table[first]; //顯示第一個
delay_ms(5);
dula = 0x00; //一定要加，否則不穩(wěn)定
wela = 0xfd;
dula = table[second]; //顯示第二個
delay_ms(5);
dula = 0x00; //一定要加，否則不穩(wěn)定
wela = 0xfb;
dula = table[third]; //顯示第三個
delay_ms(5);
dula = 0x00; //一定要加，否則不穩(wěn)定
wela = 0xf7;
dula = table[forth]; //顯示第四個
delay_ms(5);
dula = 0x00; //一定要加，否則不穩(wěn)定
}
/*****************
*函數(shù)：延時_ms函數(shù)
*參數(shù)：timer
*返回：無
******************/
void delay_ms(uint timer)
{
uint i,j;
for(i=0;i<timer;i++)
for(j=0;j<110;j++);
}
/****************
*函數(shù)名：Timer0Init
*函數(shù)功能：定時器0初始化
*輸 入：無
*輸 出：無
*******************/
void Timer0Init()
{
TMOD|=0x01; //選擇為定時器0模式，工作方式1，僅用TR0打開啟動
TH0=0XFC; //給定時器賦初值，定時1ms
TL0=0X18;
ET0=1; //打開定時器0中斷允許
EA=1; //打開總中斷
TR0=1; //打開定時器
}
/**********************************
*函數(shù)名：void time0() interrupt 1
*函數(shù)功能：定時器0中斷函數(shù)
*輸 入：無
*輸 出：無
************************************/
void time0() interrupt 1
{
static unsigned int i=0;
TH0=0XFC; //給定時器賦初值，定時1ms
TL0=0X18;
i++;
if(i==1000) //1s
{
i=0;
if(count<9999) //小于9999
{
count++; //加一
}
else
{
count=0; //清零
}
}
}
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