dinshijishu.asm

这是我们做课程设计的时候频率发生器的一些程序模块,希望对大家有用

ORG     0000H
JMP     START

ORG     0040H
START:  MOV   SP,#50H
        CALL  INIT_51


MAIN:
        
        MOV   R2,#11
        MOV   DPTR,#TABL
L0:     MOV   A,#0
        MOVC  A,@A+DPTR
        INC   DPTR          
        CALL DISP
        DJNZ   R2,L0   
        ;setb  p0.6
        ;setb  p0.7    
        JMP   MAIN

INIT_51:MOV    TMOD,#00000001B
        MOV    IE,#0
        MOV    IP,#0
        MOV   P0,#0
        RET

DISP:
        SETB   P0.7
        MOV    P2,A
        CLR    P0.7
        SETB   P0.6
        MOV    P2,A
        CLR    P0.6
        CALL   DELAY
        RET

DELAY:  MOV   R4,#25
        SETB   TR0
   L1:  MOV   TL0,#LOW(65536-50000)
        MOV   TH0,#HIGH(65536-50000)
        JNB   TF0,$
        CLR   TF0
        DJNZ   R4,L1
        RET

TABL:   DB   00H,11H,22H,33H,44H,55H,66H,77H,88H,99H,0FFH