#include?“reg51.h“
xdata?unsigned?char?P_8255?_at_?0x003;	//8255的控制口
xdata?unsigned?char?PA_8255?_at_?0x000;	//8255的PA口
xdata?unsigned?char?PB_8255?_at_?0x001;	//8255的PB口
xdata?unsigned?char?PC_8255?_at_?0x002;	//8255的PC口
code?unsigned?char?TAB[]?={0xfc0x600xda0xf20x660xb60xbe0xe00xfe0xf60xee0x3e0x9c0x7a0x9e0x8e0x020x010x0};
data?unsigned?char??LEDcash[8]secminhourhanglie;
data?unsigned?char?bufferkeyflag;
bit?bsec;
bit	bkey;
//延時1ms
void?Delay1ms（）
{
	unsigned?char?i;
	i?=?0;
	while?（--i）;
}

//顯示
Display（）
{?
	unsigned?char?i?=?0xfe;
?	unsigned?char?j;
?	for?（j?=?0;?j?	{
		PA_8255?=?i;					
		PB_8255?=TAB[LEDcash[j]];
?		i?=（i<<1）|0x01;				
		Delay1ms（）;
	}
}
void?Delay10ms（）
{
unsigned?ijk;
	for（i=0;i<0x0a;i++）
		for（j=0;j<0x04;j++）
			for（k=0;k<0xf9;k++）;
}

//外中斷0服務函數
void?Int0（）?interrupt?0
{????EX0=0;
??if（（PC_8255&0x0f）!=0x0f）??
???{??Delay10ms（）;???????????????????????//消抖
?????if（（PC_8255&0x0f）!=

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????2825??2009-11-29?14:07??clock\2.ABS

?????文件???????3601??2009-11-29?14:04??clock\2.c

?????文件????????820??2009-11-29?14:07??clock\2.DOB

?????文件?????123960??2009-11-29?14:06??clock\2.DSN

?????文件???????2269??2009-11-29?14:07??clock\2.hex

?????文件??????11625??2009-11-29?14:07??clock\2.lst

?????文件??????11988??2009-11-29?14:07??clock\2.M51

?????文件???????4500??2009-11-29?14:07??clock\2.obj

?????文件????????766??2009-11-29?14:07??clock\2.PWI

?????文件???????3215??2009-11-29?14:07??clock\2.SYM

?????目錄??????????0??2009-11-29?14:24??clock

-----------?---------??----------?-----??----

???????????????165569????????????????????11