📄 setup-tx49-ref4955.html

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>TX49 Hardware Setup</TITLE
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><H1
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><A
NAME="SETUP-TX49-REF4955">TX49 Hardware Setup</H1
><P
>The eCos installation CD contains a copy of the eCos GDB stubs
in  SREC format which must be programmed into the board&#8217;s
FLASH memory.</P
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN3294">Preparing the GDB stubs</H2
><P
>These stub preparation steps are not strictly necessary as
the eCos distribution ships with pre-compiled stubs in the directory <TT
CLASS="FILENAME"
>loaders/tx49-ref4955</TT
> relative
to the installation root.</P
><DIV
CLASS="SECT3"
><H3
CLASS="SECT3"
><A
NAME="AEN3298">Building the GDB stub image with the eCos Configuration Tool</H3
><P
></P
><OL
TYPE="1"
><LI
><P
>		  Start with a new document - selecting the 
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>File-&#62;New</I
></SPAN
>
 menu item if necessary to do this.</P
></LI
><LI
><P
>Choose the 
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>Build-&#62;Templates</I
></SPAN
>
 menu item, and then select the TX49 REF4955 hardware.</P
></LI
><LI
><P
>While still displaying the 
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>Build-&#62;Templates</I
></SPAN
>
 dialog box, select the stubs package template to build a GDB stub.
Click 
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>OK</I
></SPAN
>.</P
></LI
><LI
><P
>Build eCos stubs using 
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>Build-&#62;Library</I
></SPAN
>.</P
></LI
><LI
><P
>When the build completes, the image files can be found
in the bin/ subdirectory of the install tree. GDB stub
images have the prefix gdb_module.</P
></LI
></OL
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><DIV
CLASS="SECT3"
><H3
CLASS="SECT3"
><A
NAME="AEN3316">Building the GDB stub image with ecosconfig</H3
><P
></P
><OL
TYPE="1"
><LI
><P
>		  Make an empty directory to contain the build tree,
		  and cd into it.</P
></LI
><LI
><P
>To build a GDB stub ROM image, enter the command:</P
><TABLE
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><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>$ ecosconfig new ref4955 stubs </PRE
></TD
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></LI
><LI
><P
>Enter the commands:</P
><TABLE
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BGCOLOR="#E0E0F0"
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><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>$ ecosconfig tree
$ make</PRE
></TD
></TR
></TABLE
></LI
><LI
><P
>When the build completes, the image files can be found
in the bin/ subdirectory of the install tree. GDB stub
images have the prefix gdb_module.</P
></LI
></OL
></DIV
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN3329">Installing GDB stubs into FLASH</H2
><P
>Boot into the board&#8217;s firmware in little-endian mode:</P
><P
>Set the switches like this:   </P
><P
>SW1: 10000000 (first lever up, the rest down)   
SW2: 10000010</P
><P
>Connect serial cable on the lower connector, configure terminal
emulator for 38400, 8-N-1.</P
><P
>When booting the board, you should get this prompt:</P
><TABLE
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><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>HCP5 rev 0.9B .    
HCP5?</PRE
></TD
></TR
></TABLE
><P
>Select o (option), a (FLASH) and b (boot write). You should
see this:</P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>Boot ROM Write   
ROM address-ffffffffbd000000, Boot Bus-[32bit]  
ID2 0 4 ffffffffa002ad40  
zzz SS-40000 IV-1 CS-20000 CC-2   
Flash ROM-[28F640J5], [16bit chip] * 2 * 1
Block size-00040000  count-64  
ROM adr ffffffffbd000000-ffffffffbe000000  mask-00fc0000
Send Srecord file sa=00000000 size=ffffffffffffffff
ra=fffffffffe000000
	  </PRE
></TD
></TR
></TABLE
><P
>Now send the stub SREC data down to the board using the terminal
 emulator&#8217;s &#8216;send ASCII&#8217; (or similar)
functionality. </P
><P
>Red Hat has experienced some sensitivity to how fast the data
is written to the board. Under Windows you should configure Minicom
to use a line delay of 100 milliseconds. Under Linux, use the slow_cat.tcl
 script:</P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>% cd BASE_DIR/packages/hal/mips/ref4955/<TT
CLASS="REPLACEABLE"
><I
>&#60;version&#62;</I
></TT
>/misc
% slow_cat.tcl &lt; [path]/gdb_module.srec &#62; /dev/ttyS0</PRE
></TD
></TR
></TABLE
><P
>Power off the board, and change it to boot the GDB stubs in
big-endian mode by setting the switches like this:</P
><P
>SW1: 00000000 (all levers down)   
SW2: 10001010</P
><P
>The GDB stubs allow communication with GDB using the serial
port at connector PJ7A (lower connector). The communication parameters
are  fixed at 38400 baud, 8 data bits, no parity bit and 1 stop
bit  (8-N-1). No flow control is employed. Connection to the host
computer should be made using a straight through serial cable.</P
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