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  28 <h1><a name="example_usb-based_jtag_interface" id="example_usb-based_jtag_interface">Example USB-based JTAG interface</a></h1>
  29 <div class="level1">
  30
  31 <p>
  32 If you installed the gEDA Tool Suite from the distribution CD-ROM, then you should have this example of a USB-based JTAG interface in the:<br/>
  33  <strong><code>{source-code_installation_path}geda-sources/gedagaf/geda-examples-20060123/gTAG</code></strong> <br/>
  34  directory.
  35 </p>
  36 <pre class="code">              gTAG -  USB to JTAG interface
  37                 ============================
  38
  39 This is the README file for the schematic of gTAG.
  40
  41 Short description
  42 -----------------
  43 gTAG is an interface to connect your USB port of computer to talk
  44 to your circuits which talks JTAG.
  45
  46 Copyright
  47 ---------
  48 These schematics is (C) by Stefan Petersen (spe@stacken.kth.se) and
  49 released under GPL (see the attached file COPYING). GPL is mainly
  50 written for software, ie intellectual property in electronic form.
  51 By making this schematic an intellectual property in electronic
  52 form gTAG schematics can be covered by GPL.
  53
  54 How?
  55 ----
  56 These schematics are made with gschem and netlists are then generated
  57 with gnetlist. Both gschem and gnetlist are part of gEDA
  58 (http://www.geda.seul.org/).
  59
  60 Files
  61 -----
  62 The distribution of the schematics of gTAG should consist of:
  63 * README - this file.
  64 * COPYING - GPL copyright notice.
  65 * crdist.sh - shell script used to generate the tar.gz.
  66 * ChangeLog - tries to scribble down what has changed between versions.
  67 * Four component symbols:
  68   - 7414-1.sym - Original 7414 from gschem without power attributes.
  69   - max882.sym - 5-to-3.3 V converter.
  70   - cy7c64603-52nc.sym - USB microcontroller from Cypress.
  71   - sn75240pw.sym - Surge supressor for USB
  72   - copyleft.sym - Symbol with GPL text for all schematics.
  73 * Five schematics with four symbols:
  74   - gTAG.sch.sch - Toplevel schematic for gTAG
  75   - gTAG-jtagio.[sym/sch]
  76   - gTAG-ucont.[sym/sch]
  77   - gTAG-consio.[sym/sch]
  78   - gTAG-psu.[sym/sch]
  79 * gEDA rc-files for this project:
  80   - commonrc - contains common declarations for both gschem and gnetlist
  81   - gnetlistrc - gnetlist specific and and calls commonrc
  82   - gschemrc   - gschem specific and and calls commonrc
  83 </pre>
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