microsecond_delay.shtml

来自「mfc资源大全包含MFC编程各个方面的源码」· SHTML 代码 · 共 70 行

SHTML

70 行

<HTML>
<HEAD>
   <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
   <META NAME="Author" CONTENT="Zafir Anjum">
   <TITLE>Miscellaneous - Microsecond delay</TITLE>
</HEAD>
<body background="../fancyhome/back.gif" bgcolor="#FFFFFF" link="#B50029" vlink="#8E2323" alink="#FF0000" bgproperties="fixed">
<table WIDTH="100%">
<tr WIDTH="100%">
<td align=center><!--#exec cgi="/cgi/ads.cgi"--><td>
</tr>
</table>


<CENTER>
<H3>
<FONT COLOR="#AOAO99">Microsecond delay</FONT></H3></CENTER>

<CENTER>
<H3>

<HR></H3></CENTER>
This article was contributed by <A HREF="mailto:hansw@flash.net">Hans Wedemeyer</A>. 

<P>Here is a sample using system resources available to get a MicroSecond delay
function.

<P>As we know the system has WM_TIMER which gives about 50mS resolution, and
Mutlimedia Timers which can do about 1mS, and if one require a simple delay of
say 100microseconds  with about 5% accuracy there is nothing available to do
that.

<P>Using the GetTickCount() it is possible to adjust a simple for() loop that
contains _asm {NOP} and get a reasonable delay accuracy.

<P>The attached code sample explains itself.

<P>One improvement I would make next time I use this, is to save the initialization
values to the registry, and avoid doing it every time the program starts.

<P>The code has been tested on three systems ( dual pentuim Pro running at 233MHz )
( Penitum P5 at 233MHz) and Toshiba Laptop running at 133MHz.

<P><A HREF="microsecond_delay.zip">Project File</A> 31K







<P>
<HR>
<TABLE BORDER=0 WIDTH="100%" >
<TR>
<TD WIDTH="33%"><FONT SIZE=-1><A HREF="http://www.codeguru.com">Goto HomePage</A></FONT></TD>

<TD WIDTH="33%">
<CENTER><FONT SIZE=-2>&copy; 1998 Zafir Anjum</FONT>&nbsp;</CENTER>
</TD>

<TD WIDTH="34%">
<DIV ALIGN=right><FONT SIZE=-1>Contact me: <A HREF="mailto:zafir@home.com">zafir@home.com</A>&nbsp;</FONT></DIV>
</TD>
</TR>
</TABLE>
<CENTER><FONT SIZE=-2><!--#exec cgi="../cgi-bin/counters/counter.cgi"--></FONT></CENTER>
</BODY>
</HTML>

microsecond_delay.shtml - 源码说明

本页面展示了「mfc资源大全包含MFC编程各个方面的源码」中的 microsecond_delay.shtml 源码文件，采用 SHTML 编程语言编写，共 70 行代码。您可以在线阅读完整代码内容，也可以返回资源详情页下载完整源码包进行本地学习和开发。

虫虫下载站收录了大量与mfc相关的技术资源，包括源代码、技术文档、电路图等，是电子工程师和嵌入式开发者的专业学习平台。

⌨️ 快捷键说明

复制代码Ctrl + C

搜索代码Ctrl + F

全屏模式F11

增大字号Ctrl + =

减小字号Ctrl + -

显示快捷键?