From: Alexandre <thekyz@gmail.com>
To: ecos-discuss <ecos-discuss@ecos.sourceware.org>
Subject: [ECOS] Re: eCos invalidating JTAG on ARM architecture ?
Date: Thu, 05 Jul 2007 14:33:00 -0000 [thread overview]
Message-ID: <d5aafeec0707050733h67301df3w8bdbd670f529e8a1@mail.gmail.com> (raw)
In-Reply-To: <d5aafeec0707050138x77899ec2j85d5896252ffe8b0@mail.gmail.com>
A little update on that, the problem does not occur if i use
cyg_usr_start instead of main as an entry point.
On 7/5/07, Alexandre <thekyz@gmail.com> wrote:
> Hi everyone,
>
> I finally manage to run eCos on my eval board (yipee!) thanks to all
> of you guys but i have a slight debugging problem (again i know, I'm a
> problem maker -.-).
>
> After I upload my eCos code to my board via JTAG (code which is fully
> functioning by the way), I can't by any mean reach it again via JTAG.
> OpenOCD just says it can't communicate with my board. Seems like eCos
> just disable my JTAG. The only way I can access my micro controller
> again is by UART, erasing the flash using ISP, and then reflashing it
> by JTAG works anew. So it works, but I can't debug the thing.
>
> I lurked through the mailing list to see if anything like that
> happened to someone and couldn't find anything so my first guess is I
> did something wrong (I'm a pessimistic person).
>
> There are two JTAGs available on my micro controller, one is supposed
> to be always enabled when a definite input is pulled to LOW by
> hardware means (which I've done, this is the way I manage to upload
> the eCos code in the first ways). The second JTAG is enabled by
> registry means.
>
> I tried to upload a dummy code without ecos and the first JTAG (the
> hardware enabled) works perfectly without any init. The second one
> (the software enabled) works also if I input the correct init (which I
> did, I mean I managed to make it work ^^).
>
> But with eCos, neither works :(
> I tried to put my init code from the dummy software in the eCos init
> but I can't make the second JTAG work and the first one isn't working
> either.
>
> I was guessing maybe eCos init for ARM (or maybe the olimex lpc2106
> port) may have a thing which disable JTAG. Is it possible or did I do
> something wrong and JTAG should work with eCos ?
>
> For reference I use an LPC2106 ARM7 micro controller.
>
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next prev parent reply other threads:[~2007-07-05 14:33 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-05 8:38 [ECOS] " Alexandre
2007-07-05 14:33 ` Alexandre [this message]
2007-07-05 20:54 ` [ECOS] " Sergei Gavrikov
2007-07-05 21:00 ` Alexandre
2007-07-06 10:44 ` Sergei Gavrikov
[not found] ` <d5aafeec0707060446s14079f3crfa90914e187833a3@mail.gmail.com>
2007-07-06 16:49 ` Sergei Gavrikov
2007-07-06 17:24 ` Sergei Gavrikov
2007-07-10 9:56 ` Alexandre
2007-07-10 10:15 ` Andrew Lunn
2007-07-10 15:02 ` Alexandre
2007-07-10 15:14 ` Andrew Lunn
2007-07-10 15:52 ` Andy Jackson
2007-07-10 18:25 ` Alexandre
2007-07-11 11:12 ` [ECOS] IPMI driver for KCS interface jerzy dyrda
2007-07-11 11:38 ` Laurie Gellatly
2007-07-11 12:33 ` jerzy dyrda
2007-07-12 7:16 ` David Fernandez
2007-07-11 11:46 ` Andrew Lunn
2007-07-10 15:59 ` [ECOS] Re: eCos invalidating JTAG on ARM architecture ? Alexandre
2007-07-05 16:04 ` [ECOS] " Paul D. DeRocco
2007-07-05 16:25 ` Andrew Lunn
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