求教—數(shù)碼管動(dòng)態(tài)顯示閃爍問題

ID:88716 · 發(fā)表于 2015-8-22 11:41

#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit we=P2^7;
sbit du=P2^6;
sbit S2=P3^0;
sbit S3=P3^1;
sbit S4=P3^2;
sbit S5=P3^3;
uchar count;
uint timer_count;
uchar code leddata[]={

            0x3F,  //"0"
            0x06,  //"1"
            0x5B,  //"2"
            0x4F,  //"3"
            0x66,  //"4"
            0x6D,  //"5"
            0x7D,  //"6"
            0x07,  //"7"
            0x7F,  //"8"
            0x6F,  //"9"
            0x77,  //"A"
            0x7C,  //"B"
            0x39,  //"C"
            0x5E,  //"D"
            0x79,  //"E"
            0x71,  //"F"
            0x76,  //"H"
            0x38,  //"L"
            0x37,  //"n"
            0x3E,  //"u"
            0x73,  //"P"
            0x5C,  //"o"
            0x40,  //"-"
            0x00,  //熄滅
            0x00  //自定義

                     };
void delay(uint z)
{
uint x,y;
for(x = z; x > 0; x--)
for(y = 114; y > 0 ; y--);
}
void timer_init()
{
TMOD=0x01;
TH0=0x4b;
TL0=0xfd;
TR0=1;
}
void display(uint i)
{
char ge,shi,bai,qian;
qian=i/1000;
bai=i%1000/100;
shi=i%1000%100/10;
ge=i%1000%100%10;

du=1;
P0=leddata[qian];
du=0;
P0=0xff;
we=1;
P0=0xfe;
we=0;
delay(1);
du=1;
P0=leddata[bai];
du=0;
P0=0xff;
we=1;
P0=0xfd;
we=0;
delay(1);

du=1;
P0=leddata[shi];
du=0;
P0=0xff;
we=1;
P0=0xfb;
we=0;
delay(1);

du=1;
P0=leddata[ge];
du=0;
P0=0xff;
we=1;
P0=0xf7;
we=0;
delay(1);
}
void main()
{
timer_init();
while(1)
{
if(TF0==1)
{
TF0=0;
TH0=0x4b;
TL0=0xfd;
count++;
}
if(count==2)
{
count=0;
timer_count++;
if(timer_count>=9999)
timer_count=0;
display(timer_count);
}
}
}
這是從0開始，每次增加1，一直在9999循環(huán)。為什么前3位（千，百，十位）會(huì)出現(xiàn)閃爍情況，求高手幫忙看看。