hanzi.asm

16x2字符液晶调试程序

 RS EQU P1.1		 
 RW EQU P1.3
 E EQU P1.2
 ORG 0000H
 AJMP START
 ORG 0300H
START: MOV SP,#60H
MAIN:  LCALL DELAY
       MOV P0,#01H
	   LCALL ENABLE
	   MOV P0,#38H
	   LCALL ENABLE
	   MOV P0,#0FH
	   LCALL ENABLE
	   MOV P0,#06H
	   LCALL ENABLE
ZMCL:  MOV R1,#40H      ;数据量是64个。	 DISP:MOV R1,#16 LOOP:MOV A,#00H
       MOV P0,#40H
	   LCALL ENABLE
	   MOV DPTR,#TABLE
LOOP64:MOV A,#00H
       MOVC A,@A+DPTR
	   LCALL DISP
	   DJNZ R1,LOOP64 
	   LCALL XIANSHI			  ;可以转向显示程序。
DISP: MOV P0,A
      SETB RS
	  CLR  RW
	  CLR E
	  LCALL DELAY
	  SETB E
	  INC DPTR
	  RET
XIANSHI:LCALL PCOPY
        MOV P0,#80H
		LCALL ENABLE
		MOV R4,#8
		MOV R0,#20H
LOOP16: MOV A,@R0
		LCALL DISP
		INC R0
		DJNZ R4,LOOP16
		LJMP XIANSHI
PCOPY: MOV DPTR,#TABLE1
       MOV R0,#20H
       MOV R3,#8
LOOP:  CLR A
       MOVC A,@A+DPTR
	   MOV @R0,A
	   INC R0
	   INC DPTR
	   DJNZ R3,LOOP
	   RET
ENABLE:CLR RS		       ;此处没有通过查询来确定是否可以写命令。 ;是通过比较长的延时来实现的。
       CLR RW
	   CLR E
	   LCALL DELAY
	   SETB E
	   RET
DELAY:MOV R7,#255
    D1:MOV R6,#255
	D2:DJNZ R6,D2
	   DJNZ R7,D1
	   RET
TABLE:    DB 00H,07H,05H,01H,02H,04H,07H,00H
	  DB 00H,06H,09H,09H,09H,09H,06H,00H
	  DB 00H,06H,09H,09H,09H,09H,06H,00H
	  DB 00H,06H,08H,0FH,09H,09H,06H,00H
	  DB 04H,0FH,12H,0FH,0AH,1FH,02H,02H
	  DB 06H,09H,09H,06H,09H,09H,06H,00H
	  DB 00H,07H,05H,01H,02H,04H,07H,00H
	  DB 1FH,01H,02H,02H,02H,02H,02H,02H
TABLE1:   DB 00H,01H,02H,03H,04H,05H,06H,07H
END