字符点阵液晶显示简单测试程序

;*******************************************
LCD_XIE EQU 0FEFEH ;向CG/DDRAM写数据{1111/1110/1111/1110/RS//R/W-}
LCD_DU EQU 0FEFFH ;向CG/DDRAM读数据{1111/1110/1111/1111/RS//R/W-}
LCD_BUSY EQU 0FEFDH ;读忙地址        {1111/1110/1111/1101/RS//R/W-}
LCD_DATA EQU 0FEFCH ;指令存储器设置  {1111/1110/1111/1100/RS//R/W-[清屏/返回/开关设置==]}
;********************************************
ORG 0000H
SJMP MAIN
ORG 0050H

;********************************************
MAIN: LCALL LOOP_C
LCALL LOOP_S
LCALL LOOP_L
SJMP $
;********************************************
LOOP_C: MOV 20H,#00H
MOV 21H,#06H
LOOP_D: MOV A,20H
MOV DPTR,#KSDA
MOVC A,@A+DPTR ;表格查的数据 在A里面
MOV DPTR,#LCD_DATA
MOVX @DPTR,A ;开机清屏
LCALL LCD_MANG
INC 20H
DJNZ 21H,LOOP_D
RET
;****************************************数据处理区
LOOP_S: MOV 22H,#00H
MOV 23H,#0AH
LOOP_G: MOV A,22H
MOV DPTR,#STAB
MOVC A,@A+DPTR
MOV DPTR,#LCD_XIE
MOVX @DPTR,A
LCALL LCD_MANG
INC 22H
DJNZ 23H,LOOP_G
RET
;****************************************
LOOP_L: MOV A,#0C0H
MOV DPTR,#LCD_DATA
MOVX @DPTR,A ;开机清屏
LCALL LCD_MANG
MOV 22H,#00H
MOV 23H,#0AH
LOOP_P: MOV A,22H
MOV DPTR,#LOVE
MOVC A,@A+DPTR
MOV DPTR,#LCD_XIE
MOVX @DPTR,A
LCALL LCD_MANG
INC 22H
DJNZ 23H,LOOP_P
RET
;****液晶读忙[DB7/BF=1=忙表示不能接受命令和数据]~~[DB7/BF=0=不忙能接受]****
LCD_MANG: PUSH DPL
PUSH DPH
PUSH ACC
MOV DPTR,#LCD_BUSY
LCD1: MOVX A,@DPTR
JB ACC.7,LCD1
POP ACC
POP DPH
POP DPL
RET
;******************************************表格
KSDA: DB 01H,38H,0CH,14H,06H,80H,0C0H ;初始化数据表格
STAB: DB 30H,31H,32H,33H,34H ;0-9 数据表格
DB 35H,36H,37H,38H,39H
LOVE: DB 49H,20H,4CH,4FH,56H,45H,20H,59H,4FH,55H ;I LOVE YOU 数据表格
END