單片機數字時鐘實例

ID:214780 · 發表于 2017-6-26 15:21

單片機源程序如下:

#include "reg51.h"
#include "intrins.h"
sbit EN = P1^0;
unsigned char Hour=0,Minute=0,Second=0,FLAG = 0;
unsigned long int count0;
/************* 數碼管數值數組**************/
unsigned char code Number[]={
// 0 1 2 3 4 5 6 7 8 9 A B C D E F
0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x77,0x7C,0x39,0x5E,0x79,0x71};
void Delay100ms();
void ini_init();
void display();
void delay(unsigned int i);
int main()
{
char i;
ini_init();
while(1)
{
display();
switch(P1)
{
case 0XFE:while(P1==0XFE);TR1 = ~TR1; break;
case 0XFD:while(P1==0XFD);Hour++;Hour>=24?(Hour = 0):(Hour = Hour); break;
case 0XFB:while(P1==0XFB);Minute++;(Minute>=60)?(Minute = 0):(Minute = Minute); break;
case 0XF7:while(P1==0XF7);Second++;(Second>=60)?(Second = 0):(Second = Second); break;
case 0XEF:while(P1==0XEF);Hour = Minute = Second =0;break;
case 0X7F:while(P1==0X7F);P2=0X00;P0 = 0X00; TR1 = 0;FLAG = ~FLAG;break;
default:
break;
}
}
}
void Delay100ms() //@11.0592MHz
{
unsigned char i, j, k;
_nop_();
_nop_();
i = 5;
j = 52;
k = 195;
do
{
do
{
while (--k);
} while (--j);
} while (--i);
}
void ini_init()
{
TMOD&=0x00;
TMOD|=0x20;
TH1=(256-250)>>8;
TL1=(256-250);
TR1=0;
ET1=1;
EA = 1; //open global interrupt switch
}
void T1_isr() interrupt 3
{
if(count0--==0)
{
count0 = 4000;
Second++;
if(Second>=60)
{
Second = 0;
Minute++;
if(Minute>=60)
{
Minute=0;
Hour++;
if(Hour>=24)
Hour = 0;
}
}
}
}
void delay(unsigned int i)
{
char j;
for(i; i > 0; i--)
for(j = 200; j > 0; j--);
}
void display()
{
if(FLAG == 0)
{
P2 = 0X7F;
P0 = Number[Hour/10];
delay(100);
P2 = 0XBF;
P0 = Number[Hour%10];
delay(100);
P2 = 0XEF;
P0 = Number[Minute/10];
……………………
…………限于本文篇幅余下代碼請從51黑下載附件…………

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ID:296909 · 發表于 2018-3-26 19:12

原理圖呢

ID:284994 · 發表于 2018-3-30 12:13

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單片機數字時鐘實例