[U-Boot-Users] Loads function and flow control.
wd at denx.de
Mon May 26 16:46:05 CEST 2003
in message <D96E2AFA0DF3D211B1390090274549480373629A at helios.gnv.tcc.thomson-csf.com> you wrote:
> Is there any mechanism for software flow control ( XON, XOFF ) ?
No there is none, and there is no need for one.
> It seems that loads works fine when I download small files but get lost with
> big ones. So I fear a flow control problem.
I don't think so. Even at high baud rates (like 115200 bps) there is
more than enough time to receive characters through the serial line -
remember that U-Boot is strictly single-tasking, so the CPU has
nothing better to do but to wait for characters.
> What is the problem with minicom for loads ? I think that loads just expect
Minicom is broken.
> to receive ascii data. Is it wrong to send srec file using ALT S in minicom
> ( and choosing ascii data ) ?
It's not exactly wrong, but it's calling for a lot of trouble. If you
really must use S-Records, use the "cu" command from the UUCP
package. Alternatively I recommend to use the "loadb" command and
C-Kermit for the download. This is much faster, and more reliable.
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de
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