数码管的动态显示

#include <reg52.h>
#include <intrins.h>
#define uint unsigned int
#define uchar unsigned char
sbit dula = P2^6;
sbit wela = P2^7;

uchar aa,num_du,num_we;

/*段选的码表*/
uchar code table_du[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};

/*位选的码表*/
uchar code table_we[]={
0xfe,0xfd,0xfb,0xf7,
0xef,0xdf};


void main()
{
    num_du = 1;
    num_we = 0;

    TMOD = 0x01; //设置定时器/计数器的工作模式(定时)和工作方式(T0) TMOD:gate T m1 m0
    TH0 = (65536-1800)/256;
    TL0 = (65536-1800)%256;
    EA = 1;      //开总中断
    ET0 = 1;     //开T0中断
    TR0 = 1;     //启动定时器

    while(1)
    {
        if(aa == 1)    //间隔时间要足够小
        {
            aa = 0;
            
            dula = 1;                //打开段选寄存器
            P0 = table_du[num_du];   //往寄存器写值
            dula = 0;                //关闭段选寄存器
            
            wela = 1;                //打开位选寄存器
            P0 = table_we[num_we];   //往寄存器写值
            wela = 0;                //关闭位选寄存器
            
            num_du++;
            if(num_du == 7)
            num_du = 1;
            
            num_we++;
            if(num_we == 6)
            num_we = 0;
        }
    }
}

void T0_time() interrupt 1  //中断函数，方式1，即T0中断
{
    TH0 = (65536-1800)/256;
    TL0 = (65536-1800)%256;
    aa++;
}