;按鍵軟件防抖動程序
M0:
LCALL DELAY1 ;延時一段時間判斷按鍵是否繼續(xù)按下，是則跳轉到確定偏移量程序
JNB P1.0,M00
SJMP KEY
M1:
LCALL DELAY1
JNB P1.1,M11
SJMP KEY
M2:
LCALL DELAY1
JNB P1.2,M22
SJMP KEY
M3:
LCALL DELAY1
JNB P1.3,M33
SJMP KEY
M4:
LCALL DELAY1
JNB P1.4,M44
SJMP KEY
M5:
LCALL DELAY1
JNB P1.5,M55
SJMP KEY
M6:
LCALL DELAY1
JNB P1.6,M66
SJMP KEY

;確定按鍵的偏移地址程序
M00:
MOV A,#00H
LJMP PLAY
M11:
MOV A,#01H
LJMP PLAY
M22:
MOV A,#02H
LJMP PLAY
M33:
MOV A,#03H
LJMP PLAY
M44:
MOV A,#04H
LJMP PLAY
M55:
MOV A,#05H
LJMP PLAY
M66:
MOV A,#06H
LJMP PLAY

;按鍵音彈奏程序

;音符對應的定時器初值表：
TABLE1:
DW 64580,64684,64777,64820
DW 64898,64968,65030,64260
DW 64400,64524,65058,63835,64021

LOWTABLE:
DW 63628,63835,64021,64103,64260,64400,64524
MIDDLETABLE:
DW 64580 ,64684,64777,64820,64898,64968,65030
HIGHTABLE:
DW 65058,65110,65157,65178,65217,65252,65283
SEG7:
DB 06H, 5BH, 4FH,66H, 6DH, 7DH,07H

;音符節(jié)拍表：
TABLE:
DB 02H,82H
DB 16H,32H,54H,02H,52H
DB 0A6H,32H,54H,02H,52H
DB 64H,74H,0B6H,64H
DB 52H,5CH,32H,22H
DB 16H,12H,14H,32H,22H
DB 16H,12H,14H,22H,32H
DB 26H,12H,94H,22H,32H
DB 2CH
DB 32H,52H
DB 36H,22H,14H,54H
DB 0ACH,92H,0A2H
DB 96H,0A2H,96H,82H
DB 3CH,54H
DB 36H,22H,14H,54H
DB 0ACH,92H,0A2H
DB 16H,12H,14H,22H,32H
DB 2CH,02H,82H
DB 16H,32H,56H,12H
DB 0A6H,32H,56H,52H
DB 66H,72H,0B6H,62H
DB 62H,52H,58H,32H,22H
DB 16H,12H,14H,32H,22H
DB 16H,12H,14H,22H,32H
DB 26H,92H,0A4H,12H,22H
DB 1CH
DB 00
TABLE2:
DB 88h,14h,24h,36H,42H,34H,14H,28H,14H,94H
DB 1fH,88H,14H,24H,34H,32H,42H,54H,14H
DB 46H,32H,54H,22H,32H,32H,22H,2CH,38H,54H,74H
DB 76H,62H,68H,54H,52H,62H,74H,62H,52H,3fH
DB 46H,42H,54H,64H,54H,42H,32H,28H,0a4H,0a2H
DB 92H,84H,94H,1fH,0b8H,68H,46H,52H,68H
DB 74H,72H,72H,74H,62H,52H,3fH,0b8H,68H
DB 46H,52H,68H,64H,62H,62H,64H,42H,32H,2fH
DB 58H,14H,24H,36H,42H,34H,12H,12H,26H,22H,24H,22H,12H
DB 94H,9cH,0a8H,0a6H,92H,84H,64H,54H,22H,22H,46H,42H,44H,32H,22H,5fH
DB 00
TABLE3:
DB 82H,92H,12H,14H,12H,14H,92H,82H,12H,14H,22H,14H,92H,12H,22H,24H
DB 22H,24H,12H,92H,22H,24H,32H,24H,32H,52H,62H,54H,52H,64H,52H,32H
DB 22H,32H,22H,12H,94H,82H,92H,12H,14H,12H,14H,94H,1cH
DB 82H,92H,12H,14H,12H,14H,92H,82H,12H,14H,22H,14H,92H,12H,22H,24H
DB 22H,24H,12H,92H,22H,24H,32H,24H,32H,52H,62H,54H,52H,64H,52H,32H
DB 22H,32H,22H,12H,94H,82H,92H,12H,14H,12H,14H,22H,12H,1cH,32H,52H
DB 62H,64H,62H,64H,0b2H,62H,52H,54H,62H,54H,32H,22H
DB 12H,14H,12H,14H,24H,3cH,32H,22H,12H,14H,12H,14H,0b2H,62H,52H,54H,62H,54H,32H,52H
DB 66H,0b2H,0b4H,62H,52H,5cH,32H,52H,62H,64H,62H,64H,0b2H,62H,52H,54H
DB 62H,54H,32H,22H,12H,14H,12H,14H,54H,3cH,32H,22H,12H,14H,12H,14H,22H,32H
DB 52H,54H,32H,54H,32H,52H,6fH,04H,02H,92H,32H,24H,12H,1fH
DB 00

END