From: GONZALEZ Laurent <laurent.gonzalez@trango-systems.com>
To: ecos-discuss@ecos.sourceware.org
Subject: Re: [ECOS] redboot with console baudrate 115200
Date: Wed, 07 Jun 2006 13:43:00 -0000 [thread overview]
Message-ID: <20060607154256.07022546@listel> (raw)
In-Reply-To: <4486946D.4070706@tiscali.be>
On Wed, 07 Jun 2006 10:55:09 +0200
Jürgen Lambrecht <Jurgen.Lambrecht@tiscali.be> wrote:
>
> The strange thing is that on the eb55 demoboard, 38400 downloads are no
> problem.
Do both boards use the same quartz ? Is internal PLL programmed in a similar way ? Are the timing/width of SRAM or flash access identical ?
It may look strange, but at 38400, the one-char buffer time-frame does not meet the critical path of xmodem routine, and sometime char is lost. Remind that this path increases a lot if you try to download an elf (compared to raw).
A few years ago there has been discussion here about a buffered serial driver (in kernel configurations, using interrupts), but I am not sure that the hal-serial used by redboot has been enhanced in the same way.
best regards.
--
GONZALEZ Laurent
-----------------------------------------
TRANGO Systems - ELSYS Design Group
74, avenue des Martyrs
38000 Grenoble
Tel: 33 (0)4 76 12 28 44
Fax: 33 (0)4 76 12 28 49
-----------------------------------------
Trango, the real-time embedded hypervisor
http://www.trango-systems.com
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prev parent reply other threads:[~2006-06-07 13:43 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-05 11:58 Dirk Eibach
2006-05-05 12:25 ` Andrew Lunn
2006-06-07 8:55 ` Jürgen Lambrecht
2006-06-07 9:00 ` Andrew Lunn
2006-06-07 13:43 ` GONZALEZ Laurent [this message]
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