#include
#include
#define?uchar?unsigned?char
#define?uint?unsigned?int
void?Init（）;
uchar?Get_Key（）;
void?Play（uchar?key）;
?
sbit?buzz?=?P0^4;
uchar?keycode;
?
/*各音階對應計數器初值：12345671（高）*/
uint?toneh[8]={0xfc430xfcab647770xfd320xfd810xfdc70xf05e0xfe21};

uchar?keymode[8]={0xfe0xfd0xfb0xf70xef0xdf0xbf0x7f};?????//用于判斷哪個獨立鍵按下
?
void?main（）
{
???????Init（）;
???????while（1）
?????{
???????????keycode=Get_Key（）;???//獲取鍵值索引
???????????Play（keycode）;
???????}
}
?
void?Init（）
????????{
????????????????TMOD=0x10;???//啟動定時器1
????????????????EA=1;
????????????????ET1=1;
????????????????P1=0xff;????//設置P2口為輸入模式
????????????????buzz=0;
????????}
?
?uchar?Get_Key（）?????//讀取鍵值，并轉換為索引值
{
????????????uchar?tempi;
????????????P1=0xff;
????????????temp=P1;
????????????for?（i=0;i<8;i++）
????????????????{
??????????????????????if?（temp==keymode[i]）?return?i;???//判斷按下的按鍵
????????????????}
????????????return?8;????//用于防止無正確按鍵
}
?
void?play（uchar?key）
{
?????????if?（key==8）??//無鍵按下或多鍵按下，不響應
?????????{
?????????????TR1=0;
??????????????buzz=1;
?????????}?
?????????else
????????{
??????????????TR1=1;??//有鍵按下，開中斷
???????????????keycode=key;????//鍵值索引賦值
????????}
}
?
void?timer0?（void）?interrupt?3???????//定時器1中斷服務程序
{
??????????buzz=~buzz;
??????????TH1=toneh[keycode]/256;
??????????TL1=toneh[keycode]%256;
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2013-12-02?22:16??電子琴\
?????文件???????94685??2013-05-11?01:20??電子琴\2e4141dc3646966832fa1c41.jpg
?????文件?????1736519??2013-05-07?00:42??電子琴\IMAG0735.jpg
?????文件????????1703??2013-06-01?11:08??電子琴\LED1.LST
?????文件????????1839??2013-06-01?11:08??電子琴\LED1.OBJ
?????文件?????????509??2013-06-01?11:08??電子琴\LED1.c
?????文件????????5115??2012-12-11?09:29??電子琴\STARTUP.A51
?????文件???????11772??2013-05-11?01:30??電子琴\STARTUP.lst
?????文件?????????870??2013-05-11?01:30??電子琴\STARTUP.obj
?????文件??????146689??2013-05-11?01:20??電子琴\a4305a0c7b832d8c63d98640.jpg
?????文件??????143566??2013-05-11?01:20??電子琴\cc9baf079afa87b109fa9346.jpg
?????文件????????3290??2013-05-20?20:40??電子琴\ceshi.LST
?????文件????????4116??2013-05-20?20:40??電子琴\ceshi.OBJ
?????文件????????1513??2013-05-20?20:23??電子琴\ceshi.c
?????文件????????9057??2013-06-02?19:21??電子琴\chuangkou.LST
?????文件????????8640??2013-06-02?19:21??電子琴\chuangkou.OBJ
?????文件????????2362??2013-06-02?19:28??電子琴\chuangkou.c
?????文件???????12652??2013-06-02?19:38??電子琴\dianziqin
?????文件???????16368??2013-06-02?19:38??電子琴\dianziqin.M51
?????文件????????1999??2013-06-02?19:23??電子琴\dianziqin.Uv2.bak
?????文件????????6224??2013-06-02?19:38??電子琴\dianziqin.hex
?????文件????????1503??2013-06-02?19:38??電子琴\dianziqin.opt.bak
?????文件?????????161??2013-12-02?22:16??電子琴\dianziqin.plg
?????文件???????57357??2013-11-29?22:34??電子琴\dianziqin.uvopt
?????文件???????13248??2013-11-29?22:34??電子琴\dianziqin.uvproj
?????文件????????6599??2013-05-12?20:53??電子琴\dianziqin01.LST
?????文件????????8874??2013-05-12?20:53??電子琴\dianziqin01.OBJ
?????文件????????2524??2013-05-11?00:37??電子琴\dianziqin01.c
?????文件????????2419??2013-05-20?00:20??電子琴\dianziqin02.LST
?????文件????????3216??2013-05-20?00:20??電子琴\dianziqin02.OBJ
?????文件?????????792??2013-05-12?13:53??電子琴\dianziqin02.c
............此處省略54個文件信息