lcd--led.asm.asm

主要用于LCD的驱动,还有一些关于它的资料,等以后再传上来,它是驱动128*64大小的LCD,相当有用,也相当有价值,使用起也很简单!

;***LCD驱动***
     RS      EQU     P1.3
     RW      EQU     P1.4
        E       EQU     P1.5

        COM     EQU     20H
        DAT     EQU     21H

;******************接口定义
START:
        ORG     0000H
        MOV     SP,#60H
        LJMP    DISP
;*****************主程序入口
        ORG     40H
DISP:   MOV     COM,#30H
        ACALL   WRI


        MOV     COM,#0cH
        ACALL   WRI


        MOV     COM,#01H
        ACALL   WRI


        MOV     COM,#06H
        ACALL   WRI


;******************模块初始化



 ab1:           MOV		COM,#80H
            ACALL 	WRI

            MOV         R2,#10H
            MOV		DPTR,#DATA1
 DIS1:      CLR		A
            MOVC		A,@A+DPTR
            MOV		DAT,A
            ACALL		WRD
            ACALL		DELAY
            INC		DPTR
            DJNZ        R2,DIS1

            MOV		COM,#90H
            ACALL 	WRI
            ACALL		DELAY
            MOV         R2,#10H

 DIS2:      CLR		A
            MOVC		A,@A+DPTR
            MOV		DAT,A
            ACALL		WRD
            ACALL		DELAY
            INC		DPTR
            DJNZ        R2,DIS2


            MOV		COM,#88H
            ACALL 	WRI
            ACALL		DELAY
            MOV         R2,#10H

 DIS3:      CLR		A
            MOVC		A,@A+DPTR
            MOV		DAT,A
            ACALL		WRD
            ACALL		DELAY
            INC		DPTR
            DJNZ        R2,DIS3

            MOV		COM,#98H
            ACALL 	WRI
            ACALL		DELAY
            MOV         R2,#10H

 DIS4:      CLR		A
            MOVC		A,@A+DPTR
            MOV		DAT,A
            ACALL		WRD
            ACALL		DELAY
            INC		DPTR
            DJNZ        R2,DIS4

            ljmp       ab1




;******************显示内容程序
WRI:    PUSH     ACC
        CLR      RS
        SETB     RW
WRI1:   MOV      P0,#0FFH
        SETB     E
        MOV      A,P0
        CLR      E
        JB       ACC.7,WRI1
        CLR      RW
        SETB     E
        MOV      P0,COM
        CLR      E
        POP      ACC
        RET
;********************写指令子程序
WRD:    PUSH     ACC
        CLR      RS
        SETB      RW
WRD1:   MOV      P0,#0FFH
        SETB     E
        MOV      A,P0
        CLR      E
        JB       ACC.7,WRD1
        SETB     RS
        CLR      RW
        SETB     E
        MOV      P0,DAT

        CLR      E
        POP      ACC
        RET
;********************写数据子程序
DELAY:  MOV     R7,#0FFH
DELAY4: MOV     R6,#00FH
LOOP2:  DJNZ    R6,LOOP2
        DJNZ    R7,DELAY4
        RET
DELAY1: MOV     R4,#0ffH
DELAY11:MOV     R7,#0FFH
DELAY41:MOV     R6,#0FfH
        DJNZ    R6,$
        DJNZ    R7,DELAY41
        DJNZ    R4,DELAY11
        RET
;********************延时子程序
DATA1:
DB 20h,46H,59H,44H,31H,32H,38H,36H,34H
DB 2DH,30H,34H,30H,32H,42H,20h,53H,54H
DB 4EH,20h,0a1h,0a2h,0BBH,0C6H,0C2H,0CCH,0C4H
DB 0A4H,0A1H,0A2H,0B4H,0F8H,4CH,43H,44H,20h
DB 0B2H,0E0H,0B1H,0B3H,0B9H,0E2H,0BFH,0C9H
DB 0CFH,0D4H,0CAH,0BEH,31H,36H,2AH,31H
DB 36H,20h,0B5H,0E3H,0D5H,0F3H,0BAH,0BAH,0D7H
DB 0D6H,0a1h,0a3h,0B9H,0B2H,38H,2AH,34H,0D0H,0D0H,2CH
DB 0B4H,0AEH,0D0H,0D0H,0BFH,0DAH,0CDH,0A8H
DB 0D1H,0B6H,0B7H,0DH,0CAH,0BDH,0BFH,0C9H
DB 0D1H,0A1H
;FYD12864-0402B
       END