hi, i tried once to repair a missflashed ixp425 based accesspoint by using openwince jtag to write to the flash. i build myself a wiggler like here: http://hri.sourceforge.net/tools/index.html#jtag i tried this one with a 74hc244 and the version without, like this one: http://wiki.openwrt.org/OpenWrtDocs/Customizing/Hardware/JTAG_Cable?highlight=%28jtag%29
after some changes in the source to support the cpu, i could connect and openwince jtag gave me correct cpu und flash detection. that was at least a year ago and i did not success with writing to the flash. the reason was that the flash programming stops because of verifying the written content. i had periodic zero-blocks instead of content. here my mails from that time: http://www.nabble.com/Wiggler-IXP425-RedBoot-HOWTO-t907060.html http://www.nabble.com/Access-Memory-mapped-registers-t877987.html i think that the cpu was interrupting the writing process. this can answer why i had such periodic F's. i had similar effects with a wrt54g from linksys which i flashed via jtag. therefor i shortcut the first couple pins of the flash to let the cpu crash (quite a hack but works). after this the cpu is quite and do not disturbed the flash process. i tried windows and macraigor as well without success. regards ulf kypke 2007/2/18, Arnon Meydav <[EMAIL PROTECTED]>:
Sorry for this late reply. Have you tried using OCD commander? This is a simple, low-level (assembly) debugger that Macraigor provides for free from their website. This is a good start to make sure that your JTAG communicates well with your board. If you get communication errors trying to connecte using this program too, you probably either have hw problems, or need to configure your JTAG device to run with a slower clock. Are you using a genuine Montejade board or a host that is based on this? We initially worked fine with the Montejade, but when we went to our own host we had small HW discrepencies that caused problems with the JTAG until we figured them out. - Arnon ------------------------------ *From:* [EMAIL PROTECTED] [mailto: [EMAIL PROTECTED] *On Behalf Of *Siegfried M?ller *Sent:* Tuesday, February 13, 2007 18:13 *To:* [email protected] *Subject:* [uClinux-dev] Flash programming with Macraigor and IXP425 Arnon, thank you. I tried the two ocd files, but at me it doesn't work. It seems that the flashprogrammer software is the problem, because my montejade ist doing fine. Do you know which version you used? My version is V2.6.0 Siegfried -- Disclaimer: -- This e-mail is intended solely for the person to whom it is addressed and may contain confidential or legally privileged information. Access to this e-mail by anyone else is unauthorized. If an addressing or transmission error has misdirected this e-mail, please notify the author by replying to this e-mail and destroy this e-mail and any attachments. E-mail may be susceptible to data corruption, interception, unauthorized amendment, viruses and delays or the consequences thereof. If you are not the intended recipient, be advised that you have received this email in error and that any use, dissemination, forwarding, printing or copying of this email is strictly prohibited. _______________________________________________ uClinux-dev mailing list [email protected] http://mailman.uclinux.org/mailman/listinfo/uclinux-dev This message was resent by [email protected] To unsubscribe see: http://mailman.uclinux.org/mailman/options/uclinux-dev
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