📄 manual_dump_threshold.html

📁 Diamond公司Dscud通用驱动使用说明手册
💻 HTML
字号:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"        "http://www.w3.org/TR/html4/loose.dtd"><html lang="en"><head><title>Dump Threshold - Universal Driver Documentation</title><meta http-equiv="Content-type" content="text/html; charset=iso-8859-1"><meta name="robots" content="index,follow"><link rel="shortcut icon" href="/favicon.ico"><link rel="stylesheet" href="/dscud/style/wikiprintable.css"><script type="text/javascript" src="/dscud/style/wikibits.js"></script><style type='text/css'><!--a.new, #quickbar a.new { color: #CC2200; }#quickbar { position: absolute; top: 4px; left: 4px; border-right: 1px solid gray; }#article { margin-left: 152px; margin-right: 4px; }//--></style></head><body bgcolor='#FFFFFF'><div class='titlebox'><h1 class='pagetitle'>Dump Threshold</h1><span class='subtitle'>Universal Driver Documentation</span></div><div class='navbox'><a href="manual_Main_Page.html" class='printable' title ="Main Page">Main Page</a> || <a href="manual_Table_of_Contents.html" class='printable' title ="Table of Contents">Table_of_Contents</a> || <a href="http://www.diamondsystems.com/">Diamond Systems Website</a></div></div><div class='bodytext'>On Windows 9x/NT/2000 and Linux platforms, the A/D interrupt handlers reside within the operating system's kernel space. For reasons pertaining to this fact, they have their own sample buffers separate and distinct from the buffer passed to the functions as a part of the <a href="manual_DSCAIOINT.html" class='printable' title ="DSCAIOINT">DSCAIOINT</a> structure. Typically, the buffer in the kernel is copied to the user-space buffer whenever the maximum number of transfers has been reached (i.e., at the end of one-shot mode, or with each cycle in recycle mode). However, in some instances it is useful to have access to a current sample buffer with greater frequency, particular at slow sample rates. To allow for this behavior, the parameter dump_threshold is provided in the <a href="manual_DSCAIOINT.html" class='printable' title ="DSCAIOINT">DSCAIOINT</a> structure.
<p>
When this parameter is set to 0, the dump threshold mechanism is disabled. When this parameter is non-zero, then anytime the current number of transfers reaches a multiple of the dump threshold, the buffer in kernel space will be copied to the user's buffer. When operating in FIFO mode, the dump threshold must be a multiple of the FIFO depth. When operating in non-FIFO scan mode, the dump threshold must be a multiple of the scan range.
<p></div><p><em> <br> This page was last modified 01:06, 31 Jan 2004.<br>Copyright (c) 2004 Diamond Systems.  All Rights Reserved.</em><!-- Time since request: 0.14 secs. --></body></html>
⌨️ 快捷键说明

复制代码 Ctrl + C
搜索代码 Ctrl + F
全屏模式 F11
切换主题 Ctrl + Shift + D
显示快捷键 ?
增大字号 Ctrl + =
减小字号 Ctrl + -