这个是简单的数码管
时钟显示如果有需要，我写过比较完善的1602显示时钟.显示控制年月日等等.#include\x0d\x0asbit Begin=P2^0\x0d\x0asbit Hour=P2^1\x0d\x0asbit Mus=P2^2\x0d\x0asbit End=P2^3\x0d\x0aunsigned char code Tab[]={ 0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,\x0d\x0a0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x40}\x0d\x0aunsigned char code num[]={ 0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f}\x0d\x0aunsigned char Time[]={0,0,16,0,0,16,0,0}\x0d\x0aunsigned char a\x0d\x0aunsigned int x,m,th\x0d\x0avoid init()\x0d\x0a{\x0d\x0a TMOD=0x01\x0d\x0a TH0=(65535/50000)/256\x0d\x0a TL0=(65535/50000)%256\x0d\x0a EA=1\x0d\x0a ET0=1\x0d\x0a TR0=1\x0d\x0a}\x0d\x0avoid delay(unsigned int z) \x0d\x0a{ \x0d\x0a unsigned int x,y\x0d\x0a for(x=zx>0x--)\x0d\x0a for(y=110y>0y--)\x0d\x0a}\x0d\x0aunsigned char keyboard()\x0d\x0a{\x0d\x0a if(Begin==0){\x0d\x0a delay(5)\x0d\x0a if(Begin==0)\x0d\x0a return 1\x0d\x0a }\x0d\x0a if(Hour==0){\x0d\x0a delay(30)\x0d\x0a if(Hour==0)\x0d\x0a return 2\x0d\x0a }\x0d\x0a if(Mus==0)\x0d\x0a return 3\x0d\x0a if(End==0)\x0d\x0a return 4\x0d\x0a}\x0d\x0avoid display()\x0d\x0a{\x0d\x0a unsigned char i for(i=0i=20)\x0d\x0a {\x0d\x0a x++\x0d\x0a m=x\x0d\x0a th=m/3600//设置小时\x0d\x0a Time[0]=th/10\x0d\x0a Time[1]=th%10\x0d\x0a m=m%3600 Time[2]=16 th=m/60//设置分钟\x0d\x0a Time[3]=th/10\x0d\x0a Time[4]=th%10\x0d\x0a m=m%60 Time[5]=16 th=m//设置秒\x0d\x0a Time[6]=th/10\x0d\x0a Time[7]=th%10 a=0\x0d\x0a }\x0d\x0a}这个
程序可以实现秒的计时，按键控制开始、暂停、清零
功能，更多功能自己在看清程序的基础上进行改进。
#include <reg51.H>
sbit P3_5 =P3^5
unsigned char code dispcode[]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,
0x80,0x90,0x88,0x83,0xC6,0xA1,0x86,0x8E,0x00}
unsigned char second
unsigned char keycnt
unsigned int tcnt
void main(void)
{
unsigned char i,j
TMOD=0x02
ET0=1
EA=1
second=0
P1=dispcode[second/10]
P2=dispcode[second%10]
while(1)
{
if(P3_5==0)
{
for(i=20i>0i--)
for(j=248j>0j--)
if(P3_5==0)
{
keycnt++
switch(keycnt)
{
case 1:
TH0=0x06
TL0=0x06
TR0=1
break
case 2:
TR0=0
break
case 3:
keycnt=0
second=0
P1=dispcode[second/10]
P2=dispcode[second%10]
break
}
while(P3_5==0)
}
}
}
}
void t0(void) interrupt 1 using 0
{
tcnt++
if(tcnt==4000)
{
tcnt=0
second++
if(second==100)
{
second=0
}
P1=dispcode[second/10]
P2=dispcode[second%10]
}
}
