#define??KPORT??P1
uchar??flag=0;								//flag是按鍵是否彈起的標志位，F2是按鍵提示音的標志位
uint???key=0?num=0;								//key是按鍵值
uchar??cnt=0;?								//cnt是返回鍵按下次數的標志位，?
uchar??key_input_display=0;							//檢測是否確認轉換（輸出電阻）
uchar??key_value_dac[5];
uchar?dac_value;
uchar?adc_value;							//按鍵顯示的緩存區

unsigned?char?scan_key（void）					????//按鍵掃描函數
{
???unsigned?char?jtmp;???
???static?unsigned?char?i=0;
???KPORT?=?255-（1<???tmp?=?KPORT?&?0xf0;???	????????????????????????//將高位產生的影響消除
???if（tmp!=0xf0）??
?????for（j=4;j<8;j++）
???????if（tmp==（240-（1<???i++;?
???i&=0x03;					??						//i超過4后就清零
???return（0xff）;?							?		//若無按鍵按下返回值
}


void?input_dac_value（void）							?//對按鍵值進行處理
{
uchar?keyback=0;
keyback=scan_key（）;
if（keyback==0xff）?flag=1;							?//防止同時有多個鍵按下
if（（keyback?!=?0xff）?&&?（flag==1））?
{
	?key=keyback;
	?flag=0;										?//有按鍵按下了
	?F2=1;?									?
?????if（（key<10）?&&?（key_input_display==1））?		?//0-9的數據處理	?
?????{		??
?????	num++;?										?//有幾個按鍵按下
?????	cnt=0;
?????	switch（num）									?
	??	{
	????	case?1:??dac_value=key*100?;??????????break;?
			case?2:??dac_value=dac_value+key*10;??break;
	????	case?3:??dac_value=dac_value+key;???break;
	????????default:?break;
	??	}?
	?}
}
??
switch（key）											?
???{
		case?11:??{?								?//確認鍵處理程序
	?????????????????key_input_display=0;
	?????????????????num=0;
	?????????????????key=0;
??????????????????};??break;
		case?12:??{									?//返回鍵處理程序
???????????????????cnt++;
???????????????????if（num>3）??num=3;
???????????????????switch（num）
						??{
						????case?1:??key_value_dac[0]=‘_‘;?num=0;??break;
						????case?2:??key_value_dac[1]=‘_‘;?num=1;??break;
						????case?3:??key_value_dac[2]=‘_‘;?num=2;??break;
						????default:?break;
						??}?
??????????????????if（cnt==1）??
?????????????????????{
??????????????????????if（num==3）?dac_value=dac_value-dac_value%10;
??????????????????????if（num==2）?dac_value=dac_value-dac_value%100;
??????????????????????if（num==1）?dac_value=0;
?????????????????????}
??????????????????if（cnt==2）
?????????????????????{
??????????????????????if（num==2）?dac_value=dac_value-dac_value%100;??????????????????????
??????????????????????if（num==1）?dac_value=0;
?????????????????????}

??????????????????if（cnt==3）??dac_value=0;
??????????????????key=0;???????????????????????//防止累操作
????????????????};?break;
	?????
????????									??//復位鍵處理程序
		default:??break;					??//其它鍵按下無效
???}
}
??

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

?????文件???????1027??2011-09-15?11:26??restest1\12864_show.h

?????文件????????622??2011-09-03?07:44??restest1\adc832.h

?????文件????????271??2011-09-02?18:49??restest1\delay.h

?????文件???????1494??2010-07-05?14:44??restest1\iic.h

?????文件?????????24??2010-07-05?01:42??restest1\jianyi.h

?????文件??????????1??2010-07-05?09:32??restest1\kant.h

?????文件???????1474??2011-09-15?22:25??restest1\kong.h

?????文件???????1361??2010-07-03?13:46??restest1\LCD_12864.h

?????文件??????16159??2011-09-16?07:26??restest1\RESTEST.ABS

?????文件???????9754??2011-09-16?07:26??restest1\restest.DOB

?????文件????????625??2011-09-16?10:15??restest1\restest.frm

?????文件??????27165??2011-09-16?07:26??restest1\restest.hex

?????文件??????36203??2011-09-16?07:26??restest1\RESTEST.M51

?????文件????????341??2011-09-15?21:25??restest1\restest.prv

?????文件??????11807??2011-09-16?07:26??restest1\restest.SYM

?????文件???????2752??2011-09-15?08:33??restest1\scankey.c

?????文件???????2809??2011-09-03?07:58??restest1\scankey.h

?????文件???????6066??2011-09-15?08:38??restest1\scankey.LST

?????文件???????3899??2011-09-16?07:18??restest1\show.h

?????文件????????358??2011-09-16?07:22??restest1\speak.h

?????文件????????887??2011-09-15?10:02??restest1\timer.h

?????文件??????16204??2011-09-17?08:40??restest1\ZHU.ABS

?????文件???????9384??2010-08-11?01:16??restest1\zhu.c

?????文件???????9754??2011-09-17?08:40??restest1\zhu.DOB

?????文件??????27165??2011-09-17?08:40??restest1\zhu.hex

?????文件??????32639??2011-09-17?08:40??restest1\zhu.lst

?????文件??????36231??2011-09-17?08:40??restest1\ZHU.M51

?????文件??????21229??2011-09-17?08:40??restest1\zhu.obj

?????文件??????11807??2011-09-17?08:40??restest1\zhu.SYM

?????文件??????22361??2011-09-16?05:39??restest1\ziku.h

............此處省略4個文件信息