#include
#define?key_port?P2
sbit?key_port_0=P3^0;
sbit?key_port_1=P3^1;
sbit?key_port_2=P3^2;
sbit?key_port_3=P3^3;
sbit?key_port_4=P3^4;
sbit?key_port_5=P3^5;
sbit?key_port_6=P3^6;
sbit?key_port_7=P3^7;
unsigned?char?code?key_table[]?=?{0x3f0x060x5b0x4f0x660x6d0x7d0x070x7f0x6f0x770x7c0x390x5e0x790x71};//共陰極字型碼
void?delay（unsigned?int?i）?
	{
		unsigned?int?j?=?0;
	??	while（--i?!=?0）
	????	for（j?=?0;?j?	}
	unsigned?char?keyscan（void）
	{
????	key_port_0=key_port_1=key_port_2=key_port_3=0;?
	????key_port_4=key_port_5=key_port_6=key_port_7=1;
	????if（key_port_4==0||key_port_5==0||key_port_6==0||key_port_7==0）?
	?????{??
	????????delay（10）;//去除抖動
	????????if（key_port_4==0||key_port_5==0||key_port_6==0||key_port_7==0）return

?屬性????????????大小?????日期????時間???名稱
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?????文件??????86164??2011-08-22?10:13??2011.8.19?4x4jianpan\4X4?KeyBoard?（2）.DSN

?????文件????????768??2011-09-01?15:28??2011.8.19?4x4jianpan\4X4?KeyBoard?（2）.PWI

?????文件???????5391??2011-08-22?12:15??2011.8.19?4x4jianpan\4x4jianpan

?????文件???????3118??2011-08-22?12:15??2011.8.19?4x4jianpan\4x4jianpan.c

?????文件???????1023??2011-08-22?12:15??2011.8.19?4x4jianpan\4x4jianpan.hex

?????文件?????????53??2011-08-22?12:15??2011.8.19?4x4jianpan\4x4jianpan.lnp

?????文件???????6751??2011-08-22?12:15??2011.8.19?4x4jianpan\4x4jianpan.LST

?????文件???????9506??2011-08-22?12:15??2011.8.19?4x4jianpan\4x4jianpan.M51

?????文件???????5302??2011-08-22?12:15??2011.8.19?4x4jianpan\4x4jianpan.OBJ

?????文件???????1686??2011-08-23?18:06??2011.8.19?4x4jianpan\4x4jianpan.Opt

?????文件????????163??2011-08-23?18:06??2011.8.19?4x4jianpan\4x4jianpan.plg

?????文件???????2198??2011-08-23?16:12??2011.8.19?4x4jianpan\4x4jianpan.Uv2

????.......??????1684??2011-08-23?16:12??2011.8.19?4x4jianpan\4x4jianpan_Opt.Bak

????.......??????2055??2011-08-22?10:13??2011.8.19?4x4jianpan\4x4jianpan_Uv2.Bak

?????文件??????40722??2011-08-19?18:09??2011.8.19?4x4jianpan\Last?Loaded?4X4?KeyBoard?（2）.DBK

?????文件???????5115??2002-04-16?15:32??2011.8.19?4x4jianpan\STARTUP.A51

?????文件??????11666??2011-08-22?12:15??2011.8.19?4x4jianpan\STARTUP.LST

?????文件????????749??2011-08-22?12:15??2011.8.19?4x4jianpan\STARTUP.OBJ

?????目錄??????????0??2011-09-01?15:28??2011.8.19?4x4jianpan

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???????????????184114????????????????????19