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<!-- Copyright (C) 2003 Red Hat, Inc. --> <!-- This material may be distributed only subject to the terms --> <!-- and conditions set forth in the Open Publication License, v1.0 --> <!-- or later (the latest version is presently available at --> <!-- http://www.opencontent.org/openpub/). --> <!-- Distribution of the work or derivative of the work in any --> <!-- standard (paper) book form is prohibited unless prior --> <!-- permission is obtained from the copyright holder. --> <HTML ><HEAD ><TITLE >User Interface</TITLE ><meta name="MSSmartTagsPreventParsing" content="TRUE"> <META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ "><LINK REL="HOME" TITLE="eCos Reference Manual" HREF="ecos-ref.html"><LINK REL="UP" TITLE="Getting Started with RedBoot" HREF="getting-started-with-redboot.html"><LINK REL="PREVIOUS" TITLE="Installing RedBoot" HREF="installing-redboot.html"><LINK REL="NEXT" TITLE="RedBoot Editing Commands" HREF="redboot-editing-commands.html"></HEAD ><BODY CLASS="SECT1" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >eCos Reference Manual</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="installing-redboot.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" >Chapter 1. Getting Started with RedBoot</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="redboot-editing-commands.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="USER-INTERFACE">User Interface</H1 ><P >RedBoot provides a command line user interface (CLI). At the minimum, this interface is normally available on a serial port on the platform. If more than one serial interface is available, RedBoot is normally configured to try to use any one of the ports for the CLI. Once command input has been received on one port, that port is used exclusively until the board is reset or the channel is manually changed by the user. If the platform has networking capabilities, the RedBoot CLI is also accessible using the <TT CLASS="COMPUTEROUTPUT" >telnet</TT > access protocol. By default, RedBoot runs <TT CLASS="COMPUTEROUTPUT" >telnet</TT > on port TCP/9000, but this is configurable and/or settable by the user. </P ><P >RedBoot also contains a set of GDB "stubs", consisting of code which supports the GDB remote protocol. GDB stub mode is automatically invoked when the '$' character appears anywhere on a command line unless escaped using the '\' character. The platform will remain in GDB stub mode until explicitly disconnected (via the GDB protocol). The GDB stub mode is available regardless of the connection method; either serial or network. Note that if a GDB connection is made via the network, then special care must be taken to preserve that connection when running user code. eCos contains special network sharing code to allow for this situation, and can be used as a model if this methodology is required in other OS environments.</P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="installing-redboot.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ecos-ref.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="redboot-editing-commands.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Installing RedBoot</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="getting-started-with-redboot.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >RedBoot Editing Commands</TD ></TR ></TABLE ></DIV ></BODY ></HTML >
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