/*************************************************??
*文件名稱：?keyscan.c
*作?者：????
*版?本：????V1.00
*環?境：????Keil?uVision4
*說?明：????矩陣鍵盤掃描實驗
*修改記錄：?2020.5??
--------------------------------------------------
/*********************引腳定義********************/
#include?“reg51.h“
#include?“intrins.h“
#define?uchar?unsigned?char	//數據類型宏定義
#define?uint?unsigned?int??//數據類型宏定義
#define?outk??P1	
/*********************延時函數********************/
void?delayms1（uint?j）
?{
??uchar?i;
??for（;j>0;j--）
???{
	i=250;
????while（--i）;
???	i=249;
???	while（--i）;
???}
?}
/*********************鍵盤處理********************/
uchar?KeyScan（void）
?{
???uchar?cord_hcord_l;//行列值中間變量
???outk=0x0f;			???//行線輸出全為0
???cord_h=outk&0x0f;???//讀入列線值
???if（cord_h!=0x0f）????//先檢測有無按鍵按下
?	{
?	?delayms1（10）;????????//去抖
??if（（outk&0x0f）!=0x0f）
??	{
????cord_h=outk&0x0f;??//讀入列線值
????outk=cord_h|0xf0;??//輸出當前列線值
????cord_l=outk&0xf0;??//讀入行線值

????while（（outk&0xf0）!=0xf0）;//等待松開并輸出

????return（cord_h+cord_l）;//鍵盤最后組合碼值
???}
??}return（0xff）;?????//返回該值
}
/*------------------------------------------------
按鍵值處理函數，返回掃鍵值
------------------------------------------------*/
unsigned?char?KeyPro（void）
{
?switch（KeyScan（））
?{
??case?0x7e:return?0;break;//0?按下相應的鍵顯示相對應的碼值
??case?0x7d:return?1;break;//1
??case?0x7b:return?2;break;//2
??case?0x77:return?3;break;//3
??case?0xbe:return?4;break;//4
??case?0xbd:return?5;break;//5
??case?0xbb:return?6;break;//6
??case?0xb7:return?7;break;//7
??case?0xde:return?8;break;//8
??case?0xdd:return?9;break;//9
??case?0xdb:return?‘A‘;break;//a
??case?0xd7:return?‘B‘;break;//b
??case?0xee:return?‘C‘;break;//c
??case?0xed:return?‘D‘;break;//d
??case?0xeb:return?‘E‘;break;//e
??case?0xe7:return?‘F‘;break;//f
??default:return?0xff;break;
?}
}??

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

?????文件???????1962??2020-07-14?00:06??密碼鎖\密碼鎖\keyscan.c

?????文件????????127??2020-07-13?13:03??密碼鎖\密碼鎖\KEYSCAN.H

?????文件???????3890??2020-07-21?12:10??密碼鎖\密碼鎖\keyscan.LST

?????文件???????2900??2020-07-21?12:10??密碼鎖\密碼鎖\keyscan.OBJ

?????文件?????133179??2020-07-21?12:10??密碼鎖\密碼鎖\Last?Loaded?密碼鎖.DBK

?????文件???????1708??2020-07-13?21:44??密碼鎖\密碼鎖\LCD1602.C

?????文件????????377??2020-07-13?14:38??密碼鎖\密碼鎖\LCD1602.H

?????文件???????4430??2020-07-21?12:10??密碼鎖\密碼鎖\LCD1602.LST

?????文件???????5499??2020-07-21?12:10??密碼鎖\密碼鎖\LCD1602.OBJ

?????文件???????3147??2020-07-27?19:43??密碼鎖\密碼鎖\main.c

?????文件???????7011??2020-07-21?12:10??密碼鎖\密碼鎖\main.LST

?????文件???????5196??2020-07-21?12:10??密碼鎖\密碼鎖\main.OBJ

?????文件???????6160??2020-07-10?11:14??密碼鎖\密碼鎖\mima.c

?????文件??????12068??2020-07-10?11:14??密碼鎖\密碼鎖\mima.LST

?????文件???????1484??2020-07-10?00:11??密碼鎖\密碼鎖\uart.c

?????文件????????242??2020-05-08?23:31??密碼鎖\密碼鎖\UART.H

?????文件???????3137??2020-07-13?23:19??密碼鎖\密碼鎖\uart.LST

?????文件???????2660??2020-07-13?23:19??密碼鎖\密碼鎖\uart.OBJ

?????文件??????11674??2020-07-21?12:10??密碼鎖\密碼鎖\密碼箱

?????文件???????2522??2020-07-21?12:10??密碼鎖\密碼鎖\密碼箱.hex

?????文件?????????74??2020-07-21?12:10??密碼鎖\密碼鎖\密碼箱.lnp

?????文件??????14668??2020-07-21?12:10??密碼鎖\密碼鎖\密碼箱.M51

?????文件???????2631??2020-07-21?12:10??密碼鎖\密碼鎖\密碼箱.plg

????.......?????91746??2020-07-27?19:43??密碼鎖\密碼鎖\密碼箱.uvgui.茂名余文樂

????.......??????6104??2020-07-27?19:43??密碼鎖\密碼鎖\密碼箱.uvopt

????.......?????14595??2020-07-27?19:34??密碼鎖\密碼鎖\密碼箱.uvproj

????.......?????58675??2020-07-20?14:52??密碼鎖\密碼鎖\密碼箱_uvopt.bak

????.......?????13729??2020-07-13?14:41??密碼鎖\密碼鎖\密碼箱_uvproj.bak

?????文件?????133056??2020-07-27?19:45??密碼鎖\密碼鎖\密碼鎖.DSN

?????文件????????768??2020-07-27?19:45??密碼鎖\密碼鎖\密碼鎖.PWI

............此處省略5個文件信息