simboard.asm

两个常用的单片机仿真实验板

ORG 0000h
JMP MAIN
ORG 30H
MAIN:
MOV SP,#5FH
MOV R1,#08H
MOV R0,#58H ;显示缓冲区首地址
MOV A,#2
INIT:
MOV @R0,A ;初始化显示缓冲区
INC A
INC R0
DJNZ R1,INIT ;将0-7 送显示缓冲区
LOOP:
CALL DISPLAY
JMP LOOP
;主程序到此结束
DISPLAY:
MOV R0,#7FH ;列选择
MOV R7,#08H ;共有8 个字符
MOV R1,#58H ;显示缓冲区首地址
AGAIN:
MOV A,@R1
MOV DPTR,#DISPTABLE
MOVC A,@A+DPTR
MOV P0,A
MOV P2,R0
MOV A,R0
RR A
MOV R0,A
INC R1
DJNZ R7,AGAIN
RET
DISPTABLE: DB 0c0h,0f9h,0a4h,0b0h,99h,92h,82h,0f8h,80h,90h,0FFH ;字形码表
END