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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html><head> <title></title> <link rel="stylesheet" media="screen" type="text/css" href="./style.css" /> <link rel="stylesheet" media="screen" type="text/css" href="./design.css" /> <link rel="stylesheet" media="print" type="text/css" href="./print.css" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /></head><body><a href=start.html>start</a></br><div class="toc"><div class="tocheader toctoggle" id="toc__header">Table of Contents</div><div id="toc__inside"><ul class="toc"><li class="level1"><div class="li"><span class="li"><a href="#blackfin_network_scope_overview_v1.1" class="toc">Blackfin Network Scope Overview v1.1</a></span></div><ul class="toc"><li class="level2"><div class="li"><span class="li"><a href="#network_scope_usage" class="toc">Network Scope Usage</a></span></div><ul class="toc"><li class="level3"><div class="li"><span class="li"><a href="#form_options" class="toc">Form Options</a></span></div></li></ul></li><li class="level2"><div class="li"><span class="li"><a href="#license_notice" class="toc">License Notice</a></span></div><ul class="toc"><li class="level3"><div class="li"><span class="li"><a href="#gnuplot_licence" class="toc">Gnuplot Licence</a></span></div></li></ul></li></ul></li></ul></div></div><h1><a name="blackfin_network_scope_overview_v1.1" id="blackfin_network_scope_overview_v1.1">Blackfin Network Scope Overview v1.1</a></h1><div class="level1"><p> by Michael Hennerich <br/> hennerich@blackfin.uclinux.org <br/></p><p> <a href="media/1.png" class="media" target="_blank" title="1.png"><img src="media/1.png" class="mediaright" alt="" /></a> <br/></p><p> The Network Scope, demonstrates a simple mechanism to share access and data distributed over a TCP/IP network. The web browser contacts the <acronym title="Hyper Text Transfer Protocol">HTTP</acronym> server running on Blackfin where the <acronym title="Common Gateway Interface">CGI</acronym> script or program resides, and asks it to run the program. Parameters from the <acronym title="HyperText Markup Language">HTML</acronym> form are passed to the program (parameters are passed through the Environment, or passed similar to command line arguments) The called program samples data from the ADC using a linux device driver (adsp-spiadc.c). Incoming samples are preprocessed and stored in a file. The <acronym title="Common Gateway Interface">CGI</acronym> program then calls Gnuplot and requests to generate a <acronym title="Portable Network Graphics">PNG</acronym> or <acronym title="Joint Photographics Experts Group">JPEG</acronym> image based on the sampled data and form settings. (Gnuplot is a portable command-line driven interactive datafile and function plotting utility). The server takes the output of the <acronym title="Common Gateway Interface">CGI</acronym> program and returns it to the web browser. The web browser displays the output as an <acronym title="HyperText Markup Language">HTML</acronym> page.</p></div><h4><a name="prerequisites" id="prerequisites">Prerequisites</a></h4><div class="level4"><p> Part Number: <br/> <strong>ADDS-BF533-STAMP</strong> <br/> <strong>AD7476-DBRD</strong> <br/></p></div><h4><a name="adds-bf533-stamp_product_description" id="adds-bf533-stamp_product_description">ADDS-BF533-STAMP Product Description</a></h4><div class="level4"><pre class="code"></pre>The ADSP-BF533 STAMP uClinux Kernel Board Support Package (BSP) provides developers with a cost-effective environment to develop embedded systems with the ADSP-BF533 Blackfin Processor. The STAMP board has been specifically designed to support the development and porting of open source uClinux applications and includes the full complement of memory along with serial and network interfaces. </div><h4><a name="ad7476-dbrd_product_description" id="ad7476-dbrd_product_description">AD7476-DBRD Product Description</a></h4><div class="level4"><p> Analog to Digital converter and STAMP Add-On card. Featuring a AD7476A 12Bit high speed, low power, successive-approximation SPI ADC converter. Maximum input voltage 4.096 Volt. Maximum Sample Rate 1 MSPS. </p></div><!-- SECTION [1-1815] --><h2><a name="network_scope_usage" id="network_scope_usage">Network Scope Usage</a></h2><div class="level2"></div><!-- SECTION [1816-1848] --><h3><a name="form_options" id="form_options">Form Options</a></h3><div class="level3"><p> <strong> — Trigger Options:</strong> <br/> The left drop down field enables or disables the Trigger. The right field provides options for Level or Edge sensitive triggers. Options are Rising and Falling Edge triggers. The Level Textbox is used to adjust the desired trigger level. Maximum level is 4096 mV. <br/></p><p> <strong> — Vertical:</strong> <br/> Fine control of the major (labeled) tics on the y axis. <br/> </p><pre class="code"></pre><p><strong> — Sample Frequency:</strong> <br/> Recommended Sample Frequency measured in SPS (samples per second). The actual sample frequency may vary, due to divide ratios of System Clock. However the actual Sample frequency is displayed and used to scale the plot. Maximum Sample frequency for the AD7476A ADC is 1MSPS. <br/></p><p> <strong> — Depth:</strong> <br/> Number of samples to be sampled <br/></p><p> <strong> — Range:</strong> <br/> This option specifies the region of the graph that will be displayed. A * can be used to allow autoscaling of either of min and max. <br/></p><p> <strong> — Grid:</strong> <br/> The grid option allows grid lines to be drawn on the plot. <br/></p><p> <strong> — Highlight Zeroaxis:</strong> <br/> This option allows the Zeroaxis to be drawn on the plot. <br/></p><p> <strong> — Size Ratio:</strong> <br/> The Size Ratio option scales the displayed size of the plot. The size is relative to the default size. Example: To make the graph twice as high as wide use: 2 or 2.0 <br/></p><p> <strong> — Time/Frequency Domain:</strong> <br/> Decides whether the plot is displayed in Time/Frequency Domain. In case of Frequency the FFT options below are enabled. <br/></p><p> <strong> — FFT:</strong> <br/> Select the FFT size, available options are 1024, 512, 256, 128, 64, 32 and 16. Entries in the Horizontal Depth field are ignored. <br/> </p><p> <strong> — Scaled:</strong> <br/> Removes redundant information and scales the plot on the frequency axis according to the Sample Frequency. <br/></p><p> <strong> — Exclude F(0):</strong> <br/> Excludes the DC part from being plotted. <br/> </p><pre class="code"> </pre><p><strong> — Plot Style:</strong> <br/> Available options are: lines points, points, dots, lines, impulses, fsteps, histeps, boxes, steps. <br/></p><p> <strong> — Scale:</strong> <br/> Logarithmic scaling can be enabled on the horizontal and vertical or both axis. <br/></p><p> <strong> — Interpolate:</strong> <br/> These options include a few general-purpose routines for interpolation and approximation of data. <br/></p><p> <strong> — Measurements:</strong> <br/> If checked these options perform calculation of statistical outputs. <br/></p><p> <strong> — Input:</strong> <br/> Set to AC in when the AD7476-DBRD is jumpered for AC input mode. <br/> <br/></p><p> <strong>Action Buttons</strong> <br/></p><p> <strong> — Acquire:</strong> <br/> Samples data and plots it based on the current form settings. <br/></p><p> <strong> — Replot:</strong> <br/> Replots previous sampled data, based on the current form settings. <br/></p><p> <strong> — Multimeter:</strong> <br/> Displays current input voltage. <br/></p><p> <strong> — Show Samples:</strong> <br/> Displays the sampled data in MATLAB and C array declaration. <br/></p><p> <strong> — Files:</strong> <br/> Opens a dynamically generated webpage page, providing links to view the gnuplot files, generated by the Network Scope. <br/></p><p> <strong> — Default:</strong> <br/> Resets the form settings to it鈥檚 default state. <br/></p><pre class="code"> </pre></div><!-- SECTION [1849-4837] --><h2><a name="license_notice" id="license_notice">License Notice</a></h2><div class="level2"><p> This work is, as most of its constituent parts (application, thttpd) licensed under the GNU General Public License (<acronym title="GNU General Public License">GPL</acronym>) and all provisions set forth in this license, are applicable to this software. Additionally some packages are under a number of different licenses, like the gnuplot license (available at <a href="http://www.gnuplot.info" class="urlextern" title="http://www.gnuplot.info" rel="nofollow">www.gnuplot.info</a>) and so forth. (following hereafter) To fulfill the license requirements a patch to the original gnuplot distribution is also available. You should carefully read this licenses to understand your obligations and rights. Also you should be aware of that this is an unsupported package. Therefore <strong>NO WARRANTY</strong> or official support can be provided, especially since this is alpha quality software, which is still under development. You should not expect that everything will work. </p></div><!-- SECTION [4838-5675] --><h3><a name="gnuplot_licence" id="gnuplot_licence">Gnuplot Licence</a></h3><div class="level3"><p> /* <br/> * Copyright 1986 - 1993, 1998 Thomas Williams, Colin Kelley <br/> * <br/> * Permission to use, copy, and distribute this software and its <br/> * documentation for any purpose with or without fee is hereby granted, <br/> * provided that the above copyright notice appear in all copies and <br/> * that both that copyright notice and this permission notice appear <br/> * in supporting documentation. <br/> * <br/> * Permission to modify the software is granted, but not the right to <br/> * distribute the complete modified source code. Modifications are to <br/> * be distributed as patches to the released version. Permission to <br/> * distribute binaries produced by compiling modified sources is granted, <br/> * provided you <br/> * 1. distribute the corresponding source modifications from the <br/> * released version in the form of a patch file along with the binaries, <br/> * 2. add special version identification to distinguish your version <br/> * in addition to the base release version number, <br/> * 3. provide your name and address as the primary contact for the <br/> * support of your modified version, and <br/> * 4. retain our contact information in regard to use of the base <br/> * software. <br/> * Permission to distribute the released version of the source code along <br/> * with corresponding source modifications in the form of a patch file is <br/> * granted with same provisions 2 through 4 for binary distributions. <br/> * <br/> * This software is provided “as is” without express or implied warranty <br/> * to the extent permitted by applicable law. <br/> */ <br/></p></div><!-- SECTION [5676-] --></body></html>⌨️ 快捷键说明
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