用Keil uVision软件编一个让4位LED数码管显示1234的程序

#include

#define uchar unsigned char

#define uint unsigned int

uchar code DSY_CODE[]=

{

  0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xff

};

 uchar code dis_bet[]={7,3,1,4};

 uchar code dis_pos[]={0x01,0x02,0x04,0x08};

 void DelayMS(uint ms)

{

  uchar t;

while(ms--)

{

for(t=0;t<120;t++);

}

}

void main()

{

  uchar i;

for(i=0;i<4;i++)

{          

  P3=~dis_pos[i];

P2=~DSY_CODE[dis_bet[i]];

           DelayMS(5);

}

}