[ECOS] redboot with console baudrate 115200

GONZALEZ Laurent laurent.gonzalez@trango-systems.com
Wed Jun 7 13:43:00 GMT 2006


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
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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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