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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 >fis unlock</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="Flash Image System (FIS)" HREF="flash-image-system.html"><LINK REL="PREVIOUS" TITLE="fis lock" HREF="fis-lock-command.html"><LINK REL="NEXT" TITLE="fis erase" HREF="fis-erase-command.html"></HEAD ><BODY CLASS="REFENTRY" 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="fis-lock-command.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="fis-erase-command.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="FIS-UNLOCK-COMMAND">fis unlock</H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN4257" ></A ><H2 >Name</H2 >fis unlock -- Unlock flash area</DIV ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN4260"><H2 >Synopsis</H2 ><P ><B CLASS="COMMAND" >fis unlock</B > {-f <TT CLASS="REPLACEABLE" ><I >flash_address</I ></TT >} {-l <TT CLASS="REPLACEABLE" ><I >length</I ></TT >}</P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN4267" ></A ><H2 >Arguments</H2 ><DIV CLASS="INFORMALTABLE" ><A NAME="AEN4269"><P ></P ><TABLE BORDER="1" CLASS="CALSTABLE" ><THEAD ><TR ><TH WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" >Name</TH ><TH WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" >Type</TH ><TH WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" >Description</TH ><TH WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" >Default</TH ></TR ></THEAD ><TBODY ><TR ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" ><TT CLASS="REPLACEABLE" ><I >flash_address</I ></TT ></TD ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" >Number</TD ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" >Address of area to be unlocked.</TD ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" > </TD ></TR ><TR ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" ><TT CLASS="REPLACEABLE" ><I >length</I ></TT ></TD ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" >Number</TD ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" >Length of area to be unlocked.</TD ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" > </TD ></TR ></TBODY ></TABLE ><P ></P ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN4294" ></A ><H2 >Description</H2 ><P >This command is used to unlock a portion of flash memory forcibly, allowing it to be updated. It must be issued for regions which have been locked before the FIS can reuse those portions of flash.</P ><DIV CLASS="NOTE" ><BLOCKQUOTE CLASS="NOTE" ><P ><B >Note: </B >Some flash devices power up in locked state and always need to be manually unlocked before they can be written to.</P ></BLOCKQUOTE ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN4299" ></A ><H2 >Examples</H2 ><P >Unlock an area of the flash <TABLE BORDER="5" BGCOLOR="#E0E0F0" WIDTH="70%" ><TR ><TD ><PRE CLASS="SCREEN" >RedBoot> <TT CLASS="USERINPUT" ><B >fis unlock -f 0xa0040000 -l 0x20000</B ></TT > ... Unlock from 0xa0040000-0xa0060000: .</PRE ></TD ></TR ></TABLE ></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="fis-lock-command.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="fis-erase-command.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >fis lock</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="flash-image-system.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >fis erase</TD ></TR ></TABLE ></DIV ></BODY ></HTML >
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