汇编语言

开发平台：
DOS

1602logo.asm：源码内容
							;///////////////////////////////////////////
;....本程序实现液晶循环显示信息功能.
;///////////////////////////////////////////
RS EQU P3.5 
RW EQU P3.6 
E  EQU P3.7 
SJ EQU P1
org	00h
ajmp main
org 030h
main:
mov sp,#60h
main1:
lcall delay			;延时一段时间                      
MOV SJ,#38H			;                                  
ACALL ENABLE                    ;写指令38H                         
MOV SJ,#38H			;                                  
ACALL ENABLE                    ;写指令38H                         
MOV SJ,#38H			;                                  
ACALL ENABLE                    ;写指令38H                         
MOV SJ,#38H			;                                  
ACALL ENABLE                    ;写指令38H                         
MOV SJ,#08H			;                                  
ACALL ENABLE                    ;写指令08H                         
MOV SJ,#01H			;                                  
ACALL ENABLE                    ;写指令01H                         
MOV SJ,#06H			;                                  
ACALL ENABLE                    ;写指令06H                         
MOV SJ,#0cH			;                                  
ACALL ENABLE                    ;写指令0CH                         
MOV SJ,#80H			;第一行显示第一个字符的位置            
ACALL ENABLE                    ;调用写指令                            
mov dptr,#table3                ;第一行表头位置                        
call write1                     ;调用第一行写子程序                    
mov SJ,#0c0h			;第二行位置                            
call enable                     ;调用写指令                            
mov dptr,#table2                ;第二行表头位置                        
call write1                     ;调用第二行写子程序
jmp main1                       ;返回主程序不断的循环                  
ENABLE:				;写命令时序(参照1602LCD使用说明书）
CLR RS
CLR RW 
CLR E 
ACALL DELAY 
SETB E 
RET
write1:				;写字符串				   		
mov r1,#00h                     ;将R1清0                                      
a1:mov a,r1                     ;把R1的值送到ACC                              
movc a,@a+dptr                  ;查表取将显示的数据并把要显示的数送入ACC      
call write2                     ;调用写程序写入单个字节                       
inc r1                          ;将工作寄存器指针加一                         
cjne r1,#10h,a1                 ;R1的内容加到16后就返回到a1处                  
ret                             ;
                                                                              
write2:                         ;写单个字符                                                                             
mov SJ,a                        ;写数据到显示端口                            
setb rs                         ;写数据时序(请参照1602LCD使用说明书）         
clr rw                          
clr e
call delay
setb e
ret 
delay:
mov r7,#255
d1:mov r6,#255
d2:djnz r6,d2
djnz r7,d1
ret
      
table3: db " 1111111"
table2: db "   0571-85956028"
end

						