[U-Boot] loadb problem. Hangs on START_CHAR
Wolfgang Denk
wd at denx.de
Mon Nov 17 17:20:25 CET 2014
Dear Bo,
In message <1416231868926-196549.post at n7.nabble.com> you wrote:
>
> I keep coming back to the fact that "loads" works fine in 115200 baud, but
> "loadb" does not.
This is the funny part of it.
> If there is indeed a timing issue, it must be some handshaking in the Kermit
> protocol, right? The "loads" command just absorbs data as it is transferred,
> but the "loadb" command, using Kermit, tries to speed up the transfer by
> adjusting packet size according to crc-errors.
But you don't even get there. You write you get stuck at the
START_CHAR - eventually there is a bug in the serial driver or even
in the hardware, such that it is not really 8 bit clean, or enables
parity or such. "loads" s just an ASCII text transfer, i. e. it works
fine when you get only 7 data bits through. "loadb" will really need
an 8 bit clean link.
> I am a bit baffled as you can imagine.
Me too.
Best regards,
Wolfgang Denk
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Use the Force, Luke.
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