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</script></head><body><noscript><link rel="stylesheet" type="text/css" href="../common/css/print.css" /><div id="noscript">JavaScript is disabled on your browser. Please enable JavaScript to enjoy all the features of this site.</div></noscript><div id="header"><a href="http://www.atmel.com/webdoc"><img id="logo" alt="Atmel Logo" src="../common/images/logo.png" /></a><h1>Atmel EDBG-based Tools Protocols<br />Introduction</h1><div id="navheader"><!----><table class="navLinks"><tr><td><a title="Hide TOC tree" tabindex="5" class="pointLeft" onclick="myLayout.toggle('west')" href="#" id="showHideButton">Sidebar
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</a></td><td><a tabindex="5" class="navLinkPrevious" accesskey="p" href="protocoldocs.Introduction.html">Prev</a>
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<a tabindex="5" class="navLinkNext" accesskey="n" href="ch01s02.html">Next</a></td></tr></table></div></div><div id="content"><!----><div class="section"><div xmlns="" class="titlepage"><div><div><h2 xmlns="http://www.w3.org/1999/xhtml" class="title" style="clear: both"><a id="N1004F" />EDBG interface overview</h2></div></div></div><p xmlns="http://www.w3.org/1999/xhtml">The Atmel Embedded Debugger (EDBG) implements a composite USB device consisting of three interfaces:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>Programming & debugging interface (HID)</p></li><li class="listitem"><p>CDC Virtual COM port</p></li><li class="listitem"><p>Atmel Data Gateway Interface</p></li></ul></div><p>The programming and debugging interface is an implementation of the CMSIS-DAP
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interface defined by <span class="trademark">Keil</span>®. CMSIS-DAP supports access
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to any ARM Coresight Debug Access Port. CMSIS-DAP supports a set of "vendor" commands, which
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are used by EDBG for accessing special functions not natively supported by CMSIS-DAP, as well
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as for debugging and programming Atmel AVR device families.</p><p>The CDC Virtual COM port implementation provides a simple link between a COM port
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registered on the host PC and a RX-TX pin pair on the EDBG. This pair is connected to a UART
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pin pair on the board on which the EDBG is embedded.</p><p>The DGI is a bidirectional interface for streaming data to and from the EDBG. It is a
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custom interface with input and output BULK endpoints.</p><div class="note" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Note</h3><p>mEDBG is a scaled-down EDBG implementation and does not support the DGI.</p></div></div><script src="../common/main.js" type="text/javascript"><!----></script><script src="../common/splitterInit.js" type="text/javascript"><!----></script><div class="navfooter"><table summary="Navigation footer" width="100%"><tr><td align="left" width="40%"><a accesskey="p" href="protocoldocs.Introduction.html">Prev</a> </td><td align="center" width="20%"><a accesskey="u" href="protocoldocs.Introduction.html">Up</a></td><td align="right" width="40%"> <a accesskey="n" href="ch01s02.html">Next</a></td></tr><tr><td valign="top" align="left" width="40%"> </td><td align="center" width="20%"><a accesskey="h" href="index.html">Home</a></td><td valign="top" align="right" width="40%"> </td></tr></table></div></div><div id="sidebar"><div style="padding-top:3px;" id="leftnavigation"><div id="tabs"><ul><li><a tabindex="1" style="outline:0;" href="#treeDiv"><span class="contentsTab">Contents</span></a></li><li><a onclick="doSearch()" tabindex="1" style="outline:0;" href="#searchDiv"><span class="searchTab">Search</span></a></li></ul><div id="treeDiv"><img style="display:block;" id="tocLoading" alt="loading table of contents..." src="../common/images/loading.gif" /><span class="dochome"><a href="../index.html" tabindex="1">Documentation Home</a></span><span class="root"><a href="index.html" tabindex="1">Atmel EDBG-based Tools Protocols</a></span><div style="display:none" id="ulTreeDiv"><ul class="filetree" id="tree"><li><span class="file"><a tabindex="1" href="pr01.html">Preface</a></span></li><li><span class="file"><a tabindex="1" href="protocoldocs.Introduction.html">Introduction</a></span><ul><li id="webhelp-currentid"><span class="file"><a tabindex="1" href="ch01s01.html">EDBG interface overview</a></span></li><li><span class="file"><a tabindex="1" href="ch01s02.html">Atmel EDBG-based tool implementations</a></span></li></ul></li><li><span class="file"><a tabindex="1" href="protocoldocs.cmsis_dap.html">CMSIS-DAP</a></span><ul><li><span class="file"><a tabindex="1" href="ch02s01.html">CMSIS-DAP protocol</a></span></li><li><span class="file"><a tabindex="1" href="ch02s02.html">CMSIS-DAP vendor commands</a></span><ul><li><span class="file"><a tabindex="1" href="ch02s02s01.html">AVR-target specific vendor commands</a></span></li><li><span class="file"><a tabindex="1" href="ch02s02s02.html">ARM-target specific vendor commands</a></span><ul><li><span class="file"><a tabindex="1" href="ch02s02s02s01.html">Erase pin</a></span></li><li><span class="file"><a tabindex="1" href="ch02s02s02s02.html">Serial trace</a></span></li></ul></li><li><span class="file"><a tabindex="1" href="ch02s02s03.html">EDBG-specific vendor commands</a></span><ul><li><span class="file"><a tabindex="1" href="ch02s02s03s01.html">Get configuration</a></span></li><li><span class="file"><a tabindex="1" href="ch02s02s03s02.html">Set configuration</a></span></li><li><span class="file"><a tabindex="1" href="ch02s02s03s03.html">EDBG GET request</a></span></li><li><span class="file"><a tabindex="1" href="ch02s02s03s04.html">EDBG SET request</a></span></li></ul></li></ul></li><li><span class="file"><a tabindex="1" href="section_serial_trace.html">Serial trace commands</a></span><ul><li><span class="file"><a tabindex="1" href="ch02s03s01.html">Set transport mode</a></span></li><li><span class="file"><a tabindex="1" href="ch02s03s02.html">Set capture mode</a></span></li><li><span class="file"><a tabindex="1" href="ch02s03s03.html">Set baud rate</a></span></li><li><span class="file"><a tabindex="1" href="ch02s03s04.html">Start</a></span></li><li><span class="file"><a tabindex="1" href="ch02s03s05.html">Stop</a></span></li><li><span class="file"><a tabindex="1" href="ch02s03s06.html">Get data</a></span></li><li><span class="file"><a tabindex="1" href="ch02s03s07.html">Get status</a></span></li><li><span class="file"><a
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Hints and tips
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</a></span></li><li><span class="file"><a tabindex="1" href="ch04s05s10.html">Housekeeping ID definitions</a></span></li></ul></li></ul></li><li><span class="file"><a tabindex="1" href="protocoldocs.avr32protocol.html">AVR32 generic protocol</a></span><ul><li><span class="file"><a tabindex="1" href="ch05s01.html">Protocol commands</a></span><ul><li><span class="file"><a tabindex="1" href="ch05s01s01.html">QUERY</a></span><ul><li><span class="file"><a tabindex="1" href="section_qhb_x1c_sl.html">AVR32 QUERY contexts</a></span></li></ul></li><li><span class="file"><a tabindex="1" href="ch05s01s02.html">SET</a></span></li><li><span class="file"><a tabindex="1" href="ch05s01s03.html">GET</a></span><ul><li><span class="file"><a tabindex="1" href="section_avr32_setget_params.html">SET/GET parameters</a></span></li></ul></li><li><span class="file"><a tabindex="1" href="ch05s01s04.html">Activate Physical</a></span></li><li><span class="file"><a tabindex="1" href="ch05s01s05.html">Deactivate Physical</a></span></li><li><span class="file"><a tabindex="1" href="ch05s01s06.html">Get ID</a></span></li><li><span class="file"><a tabindex="1" href="ch05s01s07.html">Erase</a></span></li><li><span class="file"><a tabindex="1" href="ch05s01s08.html">Halt</a></span></li><li><span class="file"><a tabindex="1" href="ch05s01s09.html">Reset</a></span></li><li><span class="file"><a tabindex="1" href="ch05s01s10.html">Step</a></span></li><li><span class="file"><a tabindex="1" href="ch05s01s11.html">Read</a></span></li><li><span class="file"><a tabindex="1" href="ch05s01s12.html">Write</a></span><ul><li><span class="file"><a tabindex="1" href="section_avr32_memtypes.html">Memory Types</a></span></li></ul></li><li><span class="file"><a tabindex="1" href="ch05s01s13.html">TAP</a></span></li><li><span class="file"><a tabindex="1" href="ch05s01s14.html">Is protected</a></span></li><li><span class="file"><a tabindex="1" href="ch05s01s15.html">Erase Section</a></span></li></ul></li><li><span class="file"><a tabindex="1" href="ch05s02.html">Responses</a></span><ul><li><span class="file"><a tabindex="1" href="ch05s02s01.html">OK</a></span></li><li><span class="file"><a tabindex="1" href="ch05s02s02.html">LIST</a></span></li><li><span class="file"><a tabindex="1" href="ch05s02s03.html">ID</a></span></li><li><span class="file"><a tabindex="1" href="ch05s02s04.html">PC</a></span></li><li><span class="file"><a tabindex="1" href="ch05s02s05.html">DATA</a></span></li><li><span class="file"><a tabindex="1" href="ch05s02s06.html">FAILED</a></span></li></ul></li><li><span class="file"><a tabindex="1" href="ch05s03.html">Hints and tips</a></span><ul><li><span class="file"><a tabindex="1" href="ch05s03s01.html">Configuration</a></span></li><li><span class="file"><a tabindex="1" href="ch05s03s02.html">Activate and deactivate physical</a></span></li><li><span class="file"><a tabindex="1" href="ch05s03s03.html">Programming and debugging commands</a></span></li></ul></li><li><span class="file"><a tabindex="1" href="ch05s04.html">AVR32GENERIC ID definitions</a></span></li></ul></li><li><span class="file"><a tabindex="1" href="protocoldocs.avr8protocol.html">AVR8 generic protocol</a></span><ul><li><span class="file"><a tabindex="1" href="ch06s01.html">Protocol Commands</a></span><ul><li><span class="file"><a tabindex="1" href="ch06s01s01.html">QUERY</a></span><ul><li><span class="file"><a tabindex="1" href="section_avr8_query_contexts.html">AVR8 QUERY contexts</a></span></li></ul></li><li><span class="file"><a tabindex="1" href="ch06s01s02.html">SET</a></span></li><li><span class="file"><a tabindex="1" href="ch06s01s03.html">GET</a></span><ul><li><span class="file"><a tabindex="1" href="section_avr8_setget_params.html">SET/GET parameters</a></span><ul><li><span class="file"><a tabindex="1" href="section_avr8_setget_params.html#N11932">Device context: debugWIRE targets</a></span></li><li><span class="file"><a tabindex="1" href="section_avr8_setget_params.html#N119D3">Device context: megaAVR JTAG targets</a></span></li><li><span class="file"><a tabindex="1" href
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