On Wed, 07 Jun 2006 10:55:09 +0200 Jürgen Lambrecht <[EMAIL PROTECTED]> 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
