/*****************************
数码管显示756453,一直减到756398
*****************************/
#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit dula=P2^6;
sbit wela=P2^7;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
uchar temp,t0,t1,bai,shi,ge;
uint shu;
void init();
void delayms(uint);
void display(uchar aa,uchar bb,uchar cc,uchar bai, uchar shi,uchar ge);
void main()
{
init();
while(1)
{
display(7,5,6,bai,shi,ge);
}
}
void init()//初始化
{
shu=432;
temp=0xfe;
P1=temp;
TMOD=0x11;
TH1=(65536-50000)/256;
TL1=(65536-50000)%256;
EA=1;
ET1=1;
TR1=1;
}
void timer1() interrupt 3//定时器1
{
TH1=(65536-50000)/256;
TL1=(65536-50000)%256;
t1++;
if(t1==2)
{
t1=1;
shu--;
bai=shu/100;
shi=shu%100/10;
ge=shu%10;
if(shu==398)
{
TR1=0;
}
}
}
void delayms(uint xms)//延迟
{
uint i, j;
for(i=xms;i>0;i--)
for(j=110;j>0;j--);
}
void display(uchar aa,uchar bb,uchar cc,uchar bai, uchar shi,uchar ge)
{
dula=1;
P0=table[aa];
dula=0;
P0=0xff;
wela=1;
P0=0xfe;
wela=0;
delayms(1);
dula=1;
P0=table[bb];
dula=0;
P0=0xff;
wela=1;
P0=0xfd;
wela=0;
delayms(1);
dula=1;
P0=table[cc];
dula=0;
P0=0xff;
wela=1;
P0=0xfb;
wela=0;
delayms(1);
dula=0;
P0=0xff;
wela=1;
P0=0xf7;
wela=0;
delayms(1);
dula=1;
P0=table[shi];
dula=0;
P0=0xff;
wela=1;
P0=0xef;
wela=0;
delayms(1);
dula=1;
P0=table[ge];
dula=0;
P0=0xff;
wela=1;
P0=0xdf;
wela=0;
delayms(1);
}
数码管显示756453,一直减到756398
*****************************/
#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit dula=P2^6;
sbit wela=P2^7;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
uchar temp,t0,t1,bai,shi,ge;
uint shu;
void init();
void delayms(uint);
void display(uchar aa,uchar bb,uchar cc,uchar bai, uchar shi,uchar ge);
void main()
{
init();
while(1)
{
display(7,5,6,bai,shi,ge);
}
}
void init()//初始化
{
shu=432;
temp=0xfe;
P1=temp;
TMOD=0x11;
TH1=(65536-50000)/256;
TL1=(65536-50000)%256;
EA=1;
ET1=1;
TR1=1;
}
void timer1() interrupt 3//定时器1
{
TH1=(65536-50000)/256;
TL1=(65536-50000)%256;
t1++;
if(t1==2)
{
t1=1;
shu--;
bai=shu/100;
shi=shu%100/10;
ge=shu%10;
if(shu==398)
{
TR1=0;
}
}
}
void delayms(uint xms)//延迟
{
uint i, j;
for(i=xms;i>0;i--)
for(j=110;j>0;j--);
}
void display(uchar aa,uchar bb,uchar cc,uchar bai, uchar shi,uchar ge)
{
dula=1;
P0=table[aa];
dula=0;
P0=0xff;
wela=1;
P0=0xfe;
wela=0;
delayms(1);
dula=1;
P0=table[bb];
dula=0;
P0=0xff;
wela=1;
P0=0xfd;
wela=0;
delayms(1);
dula=1;
P0=table[cc];
dula=0;
P0=0xff;
wela=1;
P0=0xfb;
wela=0;
delayms(1);
dula=1;
P0=table[bai];
P0=0xff;
wela=1;
P0=0xf7;
wela=0;
delayms(1);
dula=1;
P0=table[shi];
dula=0;
P0=0xff;
wela=1;
P0=0xef;
wela=0;
delayms(1);
dula=1;
P0=table[ge];
dula=0;
P0=0xff;
wela=1;
P0=0xdf;
wela=0;
delayms(1);
}