用89C2051单片机做的电机测速器，千位显示不出来 -

#include <AT892051.H>
#include <STDIO.H>
#define BYTE unsigned char
#define WORD unsigned int
#define minplus 120000000 //2*1000*1000*60
sbit KEY = P3^5; //切换开关
sbit CLK = P3^4; //脉冲输入端
sbit qian = P3^3;
sbit bai = P3^1;
sbit shi = P3^0;
sbit ge = P3^7;
sbit pluse = P3^2;
BYTE led[4],min,sec,dms,showBit,cn,cn_l,cn_h,cn_n;
WORD speed,Temp1,Temp2,Temp3,count;
bit DmS5 = 0,dp1, dp2, dp3;
unsigned long count32,cn_Temp;
union un
{
unsigned long cn_Zu;
BYTE cn_byte[4];
}uCount;
const BYTE DATA_7SEG[ ] =
{
0xE7, // 0
0x84, // 1
0xD3, // 2
0xD6, // 3
0xB4, // 4
0x76, // 5
0x77, // 6
0xC4, // 7
0xF7, // 8
0xF6, // 9
0xFF,
0x00
};
//delay()________________________________________________
void delay(BYTE t)
{
BYTE i;
for (i=0;i<t;i++);
}
//display()______________________________________________________
void display(void)
{
BYTE i;
for (i=0;i<4;i++)
{
P3=~(1<<i); //低电平驱位选
P1=DATA_7SEG[led[i]];
delay(255); //about 1.5ms
}
// P1=0xff;
// P3=0xff;
}
void disp_init(void)
{
BYTE i;
led[0]=0x0a;
led[1]=0x0a;
led[2]=0x0a;
led[3]=0x0a;
for(i=0;i<200;i++)
{
display();
}
}
//Int0()_________________________________________________________
void Int0(void) interrupt 0
{
EA = 0;
TR0 = 0;
uCount.cn_byte[2] = TH0;
uCount.cn_byte[3] = TL0;
uCount.cn_byte[1] = cn;
cn = 0;
TH0 = 0x00;
TL0 = 0x0D;
TR0 = 1;
EA = 1;
}
//Time0()_________________________________________________________
void Time0(void) interrupt 1
{
cn ++;
}
//Time1()_________________________________________________________
void Time1(void) interrupt 3
{
TF1 = 0;
TH1 = 0xd8;
TL1 = 0xf0;
DmS5 =1;
switch (showBit)
{
case 0:
{
ge = 0;
shi = 1;
bai = 1;
qian = 1;
P1 = DATA_7SEG[led[showBit]];
showBit ++;
break;
}
case 1:
{
ge = 1;
shi = 0;
bai = 1;
qian = 1;
P1 = DATA_7SEG[led[showBit]];
showBit ++;
break;
}
case 2:
{
ge = 1;
shi = 1;
bai = 0;
qian = 1;
if((led[showBit] == 0) && (led[showBit+1] == 0))
{
P1 = 0;
}
else
{
P1 = DATA_7SEG[led[showBit]];
}
showBit ++;
break;
}
case 3:
{
ge = 1;
shi = 1;
bai = 1;
qian = 0;
if(led[showBit] == 0)
{
P1 = 0;
}
else
{
P1 = DATA_7SEG[led[showBit]];
}
showBit = 0;
break;
}
default:
showBit =0;
break;
}
}
//________________________________________________________________
void main(void)
{
//BYTE j;
P1 = 0xff;
P3 = 0xff;
TMOD = 0X11;
TH1 = 0xd8;
TL1 = 0xf0;
TR1 = 1;
ET1 = 1;
EA = 1;
disp_init(); //初始化显示
//TR0 = 0;
//TH0 = 0x0;
//TL0 = 0x0;
IT0 = 1;
EX0 = 1;
PX0 = 1;
ET0 = 1;
pluse = 1;
cn = 0;
speed = 0;
//count32 = 250000;
while(1)
{
if(DmS5 ==1)
{
dms++;
if(dms > 99)
{
KEY = 1;
dms = 0;
EA = 0;
uCount.cn_byte[0] = 0;
//count32 = (unsigned long)(cn_n << 16) + (cn_h << 8) + cn_l;
cn_Temp = uCount.cn_Zu;
EA = 1;
if(cn_Temp == 0)
{
speed = 0;
}
else
{
if(KEY == 1)
{
speed = (minplus/cn_Temp)>>4;
}
else
{
speed = minplus/cn_Temp;
}
}
led[3]= speed/1000;
Temp1 = speed%1000;
led[2]= Temp1/100;
Temp2 = Temp1%100;
led[1]= Temp2/10;
led[0]= Temp2%10;
}
DmS5 = 0;
}
}
}

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