单片机十字旋转LED程序

     ORG 0000H     
MAIN:  MOV DPTR,#TAB
       MOV R2,#0
MM:    MOV  A,R2
       MOVC A,@A+DPTR
      lcall hbit
       CPL A
       MOV R4,A
       INC R2            
       MOV A,R2
       MOVC A,@A+DPTR
       lcall hbit
       CPL A
        MOV R3,A
       INC R2 

       MOV P0,R4
       MOV P2,R3
       DJNZ R6,$
       DJNZ R6,$      
       MOV A,R2
       CJNE A,#128,mm    ;其中的128代表四个汉字的长度，1个汉字32，2个64----8个到255.
       LJMP main

 hbit:    ;字符颠倒
mov c,acc.0
mov b.7,c
mov c,acc.1
mov b.6,c
mov c,acc.2
mov b.5,c
mov c,acc.3
mov b.4,c
mov c,acc.4
mov b.3,c
mov c,acc.5
mov b.2,c
mov c,acc.6
mov b.1,c
mov c,acc.7
mov b.0,c
mov a,b
ret

TAB:      ;具体显示内容，这里是4个汉字
db 08h,20h,06h,20h,80h,7eh,63h,80h
db 0ch,04h,00h,04h,20h,04h,20h,04h
db 20h,04h,3fh,0fch,20h,04h,20h,04h
db 20h,04h,20h,04h,00h,04h,00h,00h
db 20h,00h,20h,02h,22h,32h,22h,0e4h
db 22h,08h,0fah,30h,22h,0e0h,2fh,80h
db 22h,04h,0fah,02h,22h,02h,23h,0fch
db 20h,00h,20h,40h,20h,30h,00h,00h
db 20h,00h,20h,00h,27h,0feh,24h,20h
db 24h,0a0h,26h,0a0h,2dh,0a0h,0f4h,0feh
db 24h,0a0h,25h,0a0h,26h,0a0h,24h,0a4h
db 24h,22h,67h,0fch,20h,00h,00h,00h
db 00h,00h,20h,04h,20h,08h,27h,98h
db 24h,0b0h,24h,82h,0a4h,81h,64h,0feh
db 24h,80h,24h,80h,24h,0a0h,27h,0b0h
db 60h,1ch,20h,08h,00h,00h,00h,00h
    

 end