sb16032.asm

液晶显示屏的资料集锦

LCDC1PORT       EQU 04feH       ;CS1-->P2.0
LCDC2PORT       EQU 01feH       ;CS2-->P2.2
LCDD1PORT       EQU 06ffH       ;A0--->P2.1  C:0000H D:0200H
LCDD2PORT       EQU 03ffH
PUTCHARDOT:
	MOV	R7,#8
PAC_PA:
	CLR	A
	MOVC	A,@A+DPTR
	CALL	LCDWRITE
	INC	YPOS
	INC	DPTR
	CLR	A
	MOVC	A,@A+DPTR
	CALL	LCDWRITE
	DEC	YPOS
	INC	DPTR
	CALL	CUSORNEXT
	MOV	A,XPOS
	JNZ	PAC_LAX
	INC	YPOS
PAC_LAX:	
	DJNZ	R7,PAC_PA
	RET
;判断列数
CUSORNEXT:
	INC	XPOS
	MOV	A,XPOS
	CJNE	A,#160,CNT_LAX
	MOV	XPOS,#0
	INC	YPOS
	ANL	YPOS,#3H
CNT_LAX:	
	RET
；写数据	
LCDWRITE:                         	                     ;送数据子程序             
	CALL	LCDPOS
	CALL	LCDWD
	RET
LCDWD:
	MOV	B,A
	MOV	A,XPOS
	CJNE	A,#80,$+3
	JNC	LWD_LA1
	MOV	A,B
	CALL	LCDWD1
	JMP	LWD_LAX
LWD_LA1:CJNE	A,#160,$+3
	JNC	LWD_LA2
	MOV	A,B
	CALL	LCDWD2
	JMP	LWD_LAX
LWD_LA2:
LWD_LAX:
	RET
；确定位置	
LCDPOS:
	PUSH	ACC
	MOV	A,YPOS
	ANL	A,#3
	ADD	A,#0B8H
	MOV	B,A
	
	MOV	A,XPOS
	CJNE	A,#80,$+3
	JNC	LPS_LA1
	CALL	LCDWC1
	MOV	A,B
	CALL	LCDWC1
	JMP	LPS_LAX
LPS_LA1:CJNE	A,#160,$+3
	JNC	LPS_LA2
	CLR	C
	SUBB	A,#80
	CALL	LCDWC2
	MOV	A,B
	CALL	LCDWC2
	JMP	LPS_LAX
LPS_LA2:
LPS_LAX:
	POP	ACC
	RET	

;LCD CONTROL
;lcd internal use
LCDHIDEDATA     EQU 0AEH
LCDRESETDATA    EQU 0E2H
LCDPAGEDATA     EQU 0B8H
LCDCOLUMNDATA   EQU 00H
LCDFIRSTCOLUMN  EQU 19
LCDDIRECTDATA   EQU 0A0H
LCDSHOW:
	MOV     A,#LCDHIDEDATA+1
	LCALL   LCDWC1     ；写控制片一
	CALL	LCDWC2     ；写控制片二
	RET
LCDHIDE:
	MOV     A,#LCDHIDEDATA
	LCALL   LCDWC1
	CALL	LCDWC2
	RET
LCDRESET:
	MOV     A,#LCDRESETDATA
	LCALL   LCDWC1
	CALL	LCDWC2
	CALL	LCDSHOW
	RET
；向一片中写控制命令
LCDWC1:
	PUSH    DPH
	PUSH    DPL
	MOV     DPTR,#LCDC1PORT
	MOVX    @DPTR,A
	MOVX    @DPTR,A
	POP     DPL
	POP     DPH
	RET
；向二片中写控制命令
LCDWC2:
	PUSH    DPH
	PUSH    DPL
	MOV     DPTR,#LCDC2PORT
	MOVX    @DPTR,A
	MOVX    @DPTR,A
	POP     DPL
	POP     DPH
	RET
；向一片中写控制数据
LCDWD1:
	PUSH    DPH
	PUSH    DPL
	MOV     DPTR,#LCDD1PORT
	MOVX    @DPTR,A
	POP     DPL
	POP     DPH
	RET
；向二片中写控制数据
LCDWD2:
	PUSH    DPH
	PUSH    DPL
	MOV     DPTR,#LCDD2PORT
	MOVX    @DPTR,A
	POP     DPL
	POP     DPH
	RET
；读片一中的数据
LCDRD1:
	PUSH    DPH
	PUSH    DPL
	MOV     DPTR,#LCDD1PORT
        MOVX    A,@DPTR
        MOVX    A,@DPTR
	POP     DPL
	POP     DPH
	RET
；读片二中的数据
LCDRD2:
	PUSH    DPH
	PUSH    DPL
	MOV     DPTR,#LCDD2PORT
        MOVX    A,@DPTR
        MOVX    A,@DPTR
	POP     DPL
	POP     DPH
	RET