📄 单片机通信.htm
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<P align=left><FONT font><FONT color=#ff0000>单片机提高</FONT><FONT
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<BR><BR><BR>;;步进电机正转，反转各3圈;步进电机正转，反转各3圈<BR>;***************************************************************************<BR>;*
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*<BR>;***************************************************************************<BR>org
00h<BR>x1:mov r3,#250<BR>start:mov r0,#00h<BR>start1:<BR>mov
p1,#0ffh<BR>mov a,r0<BR>mov dptr,#table<BR>movc a,@a+dptr<BR>jz
start<BR>cpl a<BR>mov p1,a<BR>call delay<BR>inc r0<BR>djnz
r3,start1<BR>mov r3,#250<BR>start2:<BR>mov p1,#0ffh<BR>mov
r0,#05<BR>start3:mov a,r0<BR>mov dptr,#table<BR>movc a,@a+dptr<BR><BR>jz
start2<BR>cpl a<BR>mov p1,a<BR>call delay<BR>inc r0<BR>djnz
r3,start3<BR>jmp x1<BR>delay: mov r5,#40;延时。<BR>d1: mov r6,#10<BR>d2: mov
r7,#18<BR>djnz r7,$<BR>djnz r6,d2<BR>djnz r5,d1<BR>ret<BR>table:<BR>db
03h,09h,0ch,06h<BR>db 00<BR>db 06h,0ch,09h,03h<BR>db
00<BR>end<BR></FONT></P></TD></TR></TBODY></TABLE></DIV></BODY></HTML>
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