#include
***it dula=P2^6;
***it wela=P2^7;
***it beep=P2^3;
unsigned char j,k,a1,a0,a3,s=60;
unsigned int m;
unsigned char code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,
0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
void delay(unsigned char i)
{
for(j=i;j>0;j--)
for(k=125;k>0;k--);
}
void display(unsigned char bai_c,unsigned char sh_c,unsigned char g_c)
{
P0=table[bai_c];
dula=1;
dula=0;
P0=0xfe;
wela=1;
wela=0;
delay(5);
P0=table[sh_c];
dula=1;
dula=0;
P0=0xfd;
wela=1;
wela=0;
delay(5);
P0=table[g_c];
dula=1;
dula=0;
P0=0xfb;
wela=1;
wela=0;
delay(5);
}
void main()
{
TMOD=0x01;
TR0=1;
TH0=(65536-46080)/256;// 由于晶振为11.0592,故所记次数应为46080，计时器每隔50000微秒发起一次中断。
TL0=(65536-46080)%256;//46080的来历，为50000*11.0592/12
ET0=1;
EA=1;
while(1)
{
if(m==20)
{ m=0;
s--;
}
a0=s%10;
a1=s%100/10;
a2=s/100;
display(a2,a1,a0);
if(s==0)
{
TR0=0;//时间到，定时器关闭
beep=0;//蜂鸣器响，报时。
}
}
}
void time0() interrupt 1
{TH0=(65536-46080)/256;
TL0=(65536-46080)%256;
m++;
}
#include
***it dula=P2^6;
***it wela=P2^7;
***it beep=P2^3;
unsigned char j,k,a1,a0,a3,s=60;
unsigned int m;
unsigned char code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,
0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
void delay(unsigned char i)
{
for(j=i;j>0;j--)
for(k=125;k>0;k--);
}
void display(unsigned char bai_c,unsigned char sh_c,unsigned char g_c)
{
P0=table[bai_c];
dula=1;
dula=0;
P0=0xfe;
wela=1;
wela=0;
delay(5);
P0=table[sh_c];
dula=1;
dula=0;
P0=0xfd;
wela=1;
wela=0;
delay(5);
P0=table[g_c];
dula=1;
dula=0;
P0=0xfb;
wela=1;
wela=0;
delay(5);
}
void main()
{
TMOD=0x01;
TR0=1;
TH0=(65536-46080)/256;// 由于晶振为11.0592,故所记次数应为46080，计时器每隔50000微秒发起一次中断。
TL0=(65536-46080)%256;//46080的来历，为50000*11.0592/12
ET0=1;
EA=1;
while(1)
{
if(m==20)
{ m=0;
s--;
}
a0=s%10;
a1=s%100/10;
a2=s/100;
display(a2,a1,a0);
if(s==0)
{
TR0=0;//时间到，定时器关闭
beep=0;//蜂鸣器响，报时。
}
}
}
void time0() interrupt 1
{TH0=(65536-46080)/256;
TL0=(65536-46080)%256;
m++;
}
举报
