dz1.asm

在传一些用另外一种方法控制的LED显示屏的原程序,看看.

                                                                                                                                                                                                                                                                                                                   ORG 00H
                LJMP START
                ORG 30H
      START:    MOV  R2,#0
                MOV  50H,#0
      START1:   MOV  DPTR,#TAB1
                MOV  A,R2
                MOVC A,@A+DPTR
                MOV  2AH,A
                LCALL WRITE5950_0
                INC  R2
                MOV  A,R2
                MOVC A,@A+DPTR
                MOV  2AH,A
                LCALL WRITE5950_0
                INC  R2
                
                CLR P1.1     ;STB
                NOP
                SETB P1.1
                MOV  P2,#55H
                LCALL DL2MS
                INC  50H
                MOV  A,50H
                CJNE A,#32,START1
                LJMP START
;---------------------WRITE5950--------------------------
WRITE5950_0:    MOV R5,#08H
                MOV A,2AH
LOOP:           RLC A
                MOV P0.4,C        ;列DATA  
                CLR P0.1          ;列CLK
                NOP
                SETB P0.1
                DJNZ R5,LOOP
                RET
;---------------------WRITE5952---------------------------

;----------------------DL2MS-------------------------------
 DL2MS:         MOV 43H,#14H           ; every LED(2ms)
   DL2:         MOV 44H,#14H
   DL1:
                DJNZ 44H,DL1
                DJNZ 43H,DL2
                RET
;----------------------TAB--------------------------------
;TAB:DW 0FF7FH,0FFBFH,0FFDFH,0FFEFH,0FFF7H,0FFFBH,0FFFDH,0FFFEH,7FFFH,0BFFFH,0DFFFH,0EFFFH,0F7FFH,0FBFFH,0FDFFH,0FEFFH
;----------------------TAB1-------------------------------
TAB1:	     DB  55H,0AAH,55H,0AAH,55H,0AAH,55H
END