?? music24.asm
字號:
STH0 EQU 31H
STL0 EQU 32H
TEMP EQU 33H
T1_BUF1 EQU 34H
T1_BUF2 EQU 35H
ORG 0000H
LJMP START
ORG 000BH
LJMP INT_T0
ORG 001BH
LJMP INT_T1
START: MOV TMOD,#11H
SETB ET0
SETB EA
MOV TH1,#3CH
MOV TL1,#0B0H
SETB ET1
LOOP: JB P3.5,$
JNB P3.5,$
MOV A,P1
MOV 40H,A
ANL A,#0F0H
JZ LOOP1
SWAP A
MOV B,#5
MUL AB
MOV T1_BUF1,A
SETB TR1
LOOP1: MOV A,40H
ANL A,#0FH
CJNE A,#0FH,LOOP2
CLR TR0
LJMP LOOP
LOOP2: RL A
MOV B,A
MOV DPTR,#TABLE1
MOVC A,@A+DPTR
MOV TH0,A
MOV STH0,A
MOV A,B
INC A
MOVC A,@A+DPTR
MOV TL0,A
MOV STL0,A
SETB TR0
LJMP LOOP
INT_T0:
MOV TH0,STH0
MOV TL0,STL0
CPL P3.7
RETI
INT_T1:
MOV TH1,#3CH
MOV TL1,#0B0H
DJNZ T1_BUF1,INT1_EXIT
CLR TR0
CLR TR1
INT1_EXIT:RETI
TABLE1: DW 61938,62140,62512,62843
DW 63138,63273,63521,63742
DW 63843,64029,64194,64342
END
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