此程序為設置Led流水燈與數(shù)碼管第0一位的0-16數(shù)字循環(huán)亮。不能將數(shù)碼管程序放進主函數(shù)里，因為延遲函數(shù)delay，可能會在add自加到40時剛好在dalay里面，這時不會有數(shù)碼管的閃爍。

#include

#include

#define uchar unsigned char

#define uint unsigned int

sbit wela=P2^7; //位選

sbit dula=P2^6; //段選

int num,add,temp=0xfe;

uchar code table[]={0x3f,0x06,0x5b,0x4f,

0x66,0x6d,0x7d,0x07,

0x7f,0x6f,0x77,0x7c,

0x39,0x5e,0x79,0x71};

void delay(uchar n);

void main()

{

TMOD=0x01; //工作方式

TH0=(65536-50000)/256;

TL0=(65536-50000)%256;

EA=1; //總中斷打開

ET0=1; //定時器中斷打開

TR0=1; //定時器打開

wela=1;

P0=0xfe;

wela=0;

dula=1;

P0=table[0];

dula=0; //數(shù)碼管初始化

P1=temp; //Led燈初始化

while(1)

{

delay(100);

delay(500);

temp=_crol_(temp,1);

P1=temp;

}

}

void add_1() interrupt 1 //計時器中斷函數(shù)

{

TH0=(65536-50000)/256;

TL0=(65536-50000)%256;

add++;

if(add==40)

{

num++;

add=0;

dula=1;

P0=table[num];

if(num==16)

num=-1;

}

}

//流水燈延遲函數(shù)

void delay(uchar n)

{

int i=0, j=0;

for(i=0; i

for(j=0; j<125; j++)

;

}