关于中断的一个小问题 - 51单片机 - 大学生电子实验室 大学生，电子，实验室 - powered by discuz!.mht

51单片机的内存优化和中断的有用知识

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=AF=CA=FD=BC=E4=CA=FD=BE=DD=B4=AB=B5=DD=D2=C0=BF=BF=B9=A4=D7=F7=BC=C4=B4=E6=
=C6=F7=D7=E90=C0=B4=CD=EA=B3=C9=A3=AC=D5=E2=BE=CD=CA=C7=D4=DA=D6=D0=B6=CF=
=BA=AF=CA=FD=D6=D0=D6=B8=B6=A8USING1=A3=A82=A1=A23=A3=A9=BA=F3=A3=AC=C8=DD=
=D2=D7=B3=F6=B4=ED=B5=C4=D4=AD=D2=F2=A3=AC=B6=D1=D5=BB=D6=B8=D5=EB=BF=C9=D2=
=D4=D4=DASTART51.h=D6=D0=D0=DE=B8=C4=A3=AC=C6=BD=B3=A3=CE=D2=C3=C7=BA=DC=C9=
=D9=D3=C3=A3=AC=CF=A3=CD=FB=D3=D0=BE=AD=D1=E9=B5=C4Keil=B8=DF=CA=D6=B9=B2=
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=A1=A2<STRONG>Google</STRONG>=A1=B1=D6=AE</FONT></FONT><STRONG><I><FONT=20
      face=3D"=CB=CE=CC=E5 "><FONT =
size=3D5>=A3=A1</FONT></FONT></I></STRONG></FONT><BR><FONT=20
      size=3D3><FONT color=3Dred><BR>Email : <A=20
      href=3D"mailto:[e-mail]">[e-mail]</A><BR>'QQ' :=20
      =
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      href=3D"mailto:[e-mail]">[e-mail]</A></FONT></FONT>=20
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      width=3D16></A> <A=20
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href=3D"http://wpa.qq.com/msgrd?V=3D1&amp;Uin=3D695799906&amp;Site=3D=B4=F3=
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       </DIV>
      <DL>
        <DT>UID</DT>
        <DD>2&nbsp;</DD>
        <DT>=CC=FB=D7=D3</DT>
        <DD>2375&nbsp;</DD>
        <DT>=BE=AB=BB=AA</DT>
        <DD><A=20
        =
href=3D"http://www.ceet.hbnu.edu.cn/bbs/digest.php?authorid=3D2">23</A>&n=
bsp;</DD>
        <DT>=BB=FD=B7=D6</DT>
        <DD>833798&nbsp;</DD>
        <DT>=D4=C4=B6=C1=C8=A8=CF=DE</DT>
        <DD>200&nbsp;</DD>
        <DT>=D4=DA=CF=DF=CA=B1=BC=E4</DT>
        <DD>1520 =D0=A1=CA=B1&nbsp;</DD>
        <DT>=D7=A2=B2=E1=CA=B1=BC=E4</DT>
        <DD>2007-4-6&nbsp;</DD>
        <DT>=D7=EE=BA=F3=B5=C7=C2=BC</DT>
        <DD>2009-3-24&nbsp;</DD></DL>
      <P><A href=3D"http://www.ceet.hbnu.edu.cn/bbs/space.php?uid=3D2"=20
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      <P><EM>=B9=DC=C0=ED=D4=B1</EM></P>
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href=3D"http://www.ceet.hbnu.edu.cn/bbs/viewthread.php?tid=3D3147###">=B7=
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        onclick=3D"ajaxmenu(event, this.id, 3000, 0)"=20
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        <LI class=3Doffline>=B5=B1=C7=B0=C0=EB=CF=DF </LI></UL></TD>
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      <DIV class=3Dpostinfo><STRONG id=3Dpostnum11153 =
title=3D=B8=B4=D6=C6=CC=FB=D7=D3=C1=B4=BD=D3=B5=BD=BC=F4=CC=F9=B0=E5=20
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onclick=3D"setcopy('http://www.ceet.hbnu.edu.cn/bbs/viewthread.php?tid=3D=
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'=CC=FB=D7=D3=C1=B4=BD=D3=D2=D1=BE=AD=B8=B4=D6=C6=B5=BD=BC=F4=CC=F9=B0=E5=
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=B7=A2=B1=ED=D3=DA=20
      2009-3-7 08:56&nbsp; <A=20
      =
href=3D"http://www.ceet.hbnu.edu.cn/bbs/viewthread.php?tid=3D3147&amp;pag=
e=3D1&amp;authorid=3D2"=20
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      =
<H2>=D7=AAhttp://blog.21ic.com/user1/2437/archives/2006/12624.html</H2>
      <DIV class=3Dt_msgfont=20
      =
id=3Dpostmessage_11153>=CE=D2=C8=CF=CE=AAkeil=B5=C4using=C8=B7=CA=B5=B4=E6=
=D4=DAbug=A3=AC=C0=EF=C3=E6=CE=D2=CB=F9=D3=C3=B5=C4=CA=D4=D1=E9=B3=CC=D0=F2=
=A1=A3=BB=B6=D3=AD=B4=F3=BC=D2=CC=D6=C2=DB=A3=A1(=B6=A1=B6=A1)<BR><BR>fn(=
)=CA=C7=B8=F6=D4=D9=C8=EB=BA=AF=CA=FD=A3=AC=B0=B4=C0=ED=CB=B5=D6=D0=B6=CF=
=C0=EF=B5=F7=D3=C3=C3=BB=D3=D0=CE=CA=CC=E2<BR>=BD=E1=B9=FB=A3=BA=B4=CB=BA=
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=B7<BR>=BC=D3=C1=CBusing=BA=F3,main()=C0=EF=C3=E6=B5=DA=D2=BB=B4=CE=B5=F7=
=D3=C3=B2=BB=D5=FD=C8=B7=A3=AC=D6=D0=B6=CF=C0=EF=B5=F7=D3=C3=D5=FD=C8=B7<=
BR>=B2=E9=BF=B4=BB=E3=B1=E0=BA=F3=B7=A2=CF=D6=A3=ACkeil=B6=D4=D3=DA=D2=BB=
=B8=F6=D7=D6=BD=DA=B5=C4=B2=CE=CA=FD=A3=AC=B2=BB=B9=DC=C4=E3=CA=C7=B7=F1=CA=
=B9=D3=C3=C1=CBusing=A3=AC=CB=FC=B6=BC=CA=C7=D3=C3R7=B4=AB=B5=DD<BR>=B5=C4=
=A1=A3<BR>=B5=AB=CA=C7main=BA=AF=CA=FD=B5=C4R7=C4=AC=C8=CFusing=20
      0(07H)=A3=AC=D6=D0=B6=CF=C0=EF=D3=C3using=20
      =
1(0fH)=A3=ACfn()=BA=AF=CA=FD=D4=DA=C1=BD=B4=A6=B6=BC=D2=AA=B1=BB=B5=F7<BR=
>=D3=C3=A3=AC=BE=CD=CE=DE=B7=A8=CA=CA=D3=A6=C1=CB=A1=A3<BR><BR>=D2=D4=CF=C2=
=CA=C7=B2=E2=CA=D4=B5=C4=B3=CC=D0=F2=A3=AC=B4=F3=BC=D2=BF=C9=D2=D4=D4=DA=C8=
=ED=BC=FE=B7=C2=D5=E6=CA=B1=D1=E9=D6=A4=A3=BA<BR><BR>#define=20
      uchar unsigned char<BR>=A3=A3i nclude=20
      =
&lt;reg52.h&gt;<BR>//fn()=CA=C7=B8=F6=D4=D9=C8=EB=BA=AF=CA=FD=A3=AC=B0=B4=
=C0=ED=CB=B5=D6=D0=B6=CF=C0=EF=B5=F7=D3=C3=C3=BB=D3=D0=CE=CA=CC=E2<BR>//=BD=
=E1=B9=FB=A3=BA=B4=CB=BA=AF=CA=FD=B2=BB=BC=D3using=CA=B1=A3=ACmain()=C0=EF=
=C3=E6=B5=DA=D2=BB=B4=CE=B5=F7=D3=C3=D5=FD=C8=B7=A3=AC=D6=D0=B6=CF=C0=EF=B5=
=F7=D3=C3=B2=BB=D5=FD=C8=B7<BR>//=BC=D3=C1=CBusing=BA=F3=A3main()=C0=EF=C3=
=E6=B5=DA=D2=BB=B4=CE=B5=F7=D3=C3=B2=BB=D5=FD=C8=B7=A3=AC=D6=D0=B6=CF=C0=EF=
=B5=F7=D3=C3=D5=FD=C8=B7<BR>void=20
      fn(uchar tt)reentrant //using 1 <BR>{<BR>uchar=20
      =
i,j;<BR>for(i=3D0;i&lt;tt;i++)&nbsp;&nbsp;//=B2=E2=CA=D4=CA=B1=D4=DA=B4=CB=
=BE=E4=C9=E8=B6=CF=B5=E3=A3=AC=B9=DB=B2=ECtt=B5=C4=D6=B5<BR>{<BR>j++;<BR>=
}<BR>}<BR>timer0()=20
      interrupt 1&nbsp; &nbsp;using 1<BR>{<BR>uchar i=3D0;<BR>fn(10);=20
      //=B6=A8=CA=B1=D6=D0=B6=CF=C0=EF=B5=F7=D3=C3<BR>}<BR>void =
main(void)<BR>{<BR>uchar i=3D5;<BR>fn(5);=20
      =
//=B5=DA=D2=BB=B4=CE=B5=F7=D3=C3<BR>EA=3D1;<BR>ET0=3D1;<BR>TR0=3D1;<BR>wh=
ile(1);<BR>}</DIV>
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      <DIV class=3Dsignatures style=3D"maxHeightIE: 240px"><FONT =
color=3Dblue><FONT=20
      face=3D"=BA=DA=CC=E5 "><FONT=20
      =
size=3D4>=D6=AA=D6=AE=CE=AA=D6=AA=D6=AE=A3=AC=B2=BB=D6=AA=A1=B0=B0=D9=B6=C8=
=A1=A2<STRONG>Google</STRONG>=A1=B1=D6=AE</FONT></FONT><STRONG><I><FONT=20
      face=3D"=CB=CE=CC=E5 "><FONT =
size=3D5>=A3=A1</FONT></FONT></I></STRONG></FONT><BR><FONT=20
      size=3D3><FONT color=3Dred><BR>Email : <A=20
      href=3D"mailto:[e-mail]">[e-mail]</A><BR>'QQ' :=20
      =
695799906=A3=A8=CF=B9=C1=C4=CC=EC=D2=BB=B6=A8=B2=BB=D2=AA=D5=D2=CE=D2=A3=A1=
=A3=A9<BR>MSN : <A=20
      href=3D"mailto:[e-mail]">[e-mail]</A></FONT></FONT>=20
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      <DIV class=3D"popupmenu_popup userinfopanel" =
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alt=3D"=B0=A2=C0=EF=CD=FA=CD=FA" /></a>');</SCRIPT>
       </DIV>
      <DL>
        <DT>UID</DT>
        <DD>2&nbsp;</DD>
        <DT>=CC=FB=D7=D3</DT>
        <DD>2375&nbsp;</DD>
        <DT>=BE=AB=BB=AA</DT>
        <DD><A=20
        =
href=3D"http://www.ceet.hbnu.edu.cn/bbs/digest.php?authorid=3D2">23</A>&n=
bsp;</DD>
        <DT>=BB=FD=B7=D6</DT>
        <DD>833798&nbsp;</DD>
        <DT>=D4=C4=B6=C1=C8=A8=CF=DE</DT>
        <DD>200&nbsp;</DD>
        <DT>=D4=DA=CF=DF=CA=B1=BC=E4</DT>
        <DD>1520 =D0=A1=CA=B1&nbsp;</DD>
        <DT>=D7=A2=B2=E1=CA=B1=BC=E4</DT>
        <DD>2007-4-6&nbsp;</DD>
        <DT>=D7=EE=BA=F3=B5=C7=C2=BC</DT>
        <DD>2009-3-24&nbsp;</DD></DL>
      <P><A href=3D"http://www.ceet.hbnu.edu.cn/bbs/space.php?uid=3D2"=20
      =
target=3D_blank>=B2=E9=BF=B4=CF=EA=CF=B8=D7=CA=C1=CF</A></P></DIV></TD>
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      <STRONG title=3D=B6=A5=B2=BF onclick=3Dscroll(0,0)>TOP</STRONG> =
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      href=3D"http://www.ceet.hbnu.edu.cn/bbs/space.php?uid=3D1647"=20
      target=3D_blank>zhangjia</A></CITE>=20
      <P>=B9=AD =B3=A4 =BC=CE</P>
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src=3D"http://www.ceet.hbnu.edu.cn/bbs/uc_server/avatar.php?uid=3D1647&am=
p;size=3D"></DIV>
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      <P><IMG alt=3D"Rank: 8"=20