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Re: Restoring boot/ecos on a AEB-1 using JTAG/Wiggler?
- From: Carlos Sobrinho <duckman at epilog dot ath dot cx>
- To: "Eric de Jong" <list_ericdejong_10 at gmx dot net>
- Cc: ecos-discuss at sources dot redhat dot com
- Date: Thu, 28 Aug 2003 15:20:13 +0100
- Subject: Re: [ECOS] Restoring boot/ecos on a AEB-1 using JTAG/Wiggler?
- References: <200308271547.39343.duckman@epilog.ath.cx> <000401c36d36$b2035410$e33922c7@ericnt>
- Reply-to: duckman at epilog dot ath dot cx
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On Thursday, 28 August 2003 08:33, you wrote:
> I used the free software from macgraigor. With it, I could not modify the 32
> bit registers in the atmel ARM processor. The software writes 4 bytes
> instead of 1 longword, and this is not possible:every byte was repeated 4
> times in the register. 0x10000005 became 0x05050505 (or was it 0x10101010?).
I'll try this later on next week because I found out that my homemade wiggler
cable is not very stable and I'm on exams right now.
I think I must have ground between the signals to remove some of the noise.
Besides all, I manage to write a char and a int to the peripherals memory
using the remote gdb from pppc_arm_* so maybe I'll try to write the words
using a simple script run through (arm-elf-gdb -x file) with some (x), (p)
and some printfs and then try to load a application in SRAM, run it to blink
my leds and then program my flash with a 16K bin for the boot. Since I have
256 KB of ram this shouldn't be a problem. All I need is time and that's
something I don't have until 12/SET.
> Modify it to use the right memory locations. Then load it in the internal
> memory and run it. Then load and run your own software from ram. Try a
> simple led flashing application without ecos first to see if it works.
> Eric.
As soon as I build a new wiggler I'll keep you (Eric and the list) posted with
news and questions.
With Best Regards
Carlos Sobrinho
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