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Re: AT91EB40 wiggler JTAG programmer


On Fri, 2002-08-09 at 07:38, Ulrich Dahl wrote:
> Hi
> 
> I'm working with a AT91EB40 board, I have the same problem as Scott and
> Timm with the download of redboot via the Angel debugger. I have
> concluded that my problem with the angel monitor and redboot must be in
> some sort of faulty software on the board. So I wanted to try the JTAG
> port instead...
> 
> I have now managed to build a little lowcost OCD wiggler Parallel port
> jtag interface, and my god it seems to work. BUT, and its a big BUT..
> The supplied windows software doesn't allow programming of the devices
> as it is only an eval demo. Now I was beginning to get frustrated..
> 
> I then discovered a chap who had done the same as me, and made a
> addition to GDB/Insight to support this wiggler parallel port thingy..
> 
> But I can't get that to work either, gdb wont see the interface...
> 
> Does anyone have any ideas of how I could get going with this shit..
> 
> To summarise:
> 
> I have the AT91EB40 board with accompaniyng serial cable.
> A homemade OCD wiggler (works well with the MaCgregor windows program)
> And no money, otherwise I would have bought the windows software(price
> is approx. 400$)
> 
> My plan was to get the JTAG working and downloading the RedBoot into
> Flash and then work from there...

How about building a RAM based RedBoot, loading that via the Wiggler
and then use RedBoot (running from RAM) to load and program the ROM
based version?

n.b. this is the path we often take when bringing up RedBoot on a
new platform, especially if there is already some board software
in place [which would be used in place of the Wiggler]

-- 
------------------------------------------------------------
Gary Thomas                  |
eCosCentric, Ltd.            |  
+1 (970) 229-1963            |  eCos & RedBoot experts
gthomas@ecoscentric.com      |
http://www.ecoscentric.com/  |
------------------------------------------------------------


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