This is the mail archive of the
ecos-discuss@sourceware.org
mailing list for the eCos project.
Re: redboot with console baudrate 115200
- From: GONZALEZ Laurent <laurent dot gonzalez at trango-systems dot com>
- To: ecos-discuss at ecos dot sourceware dot org
- Date: Wed, 7 Jun 2006 15:42:56 +0200
- Subject: Re: [ECOS] redboot with console baudrate 115200
- References: <445B3D16.1010001@gdsys.de> <20060505122459.GA27092@lunn.ch> <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
--
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss