[U-Boot-Users] Loads function and flow control.
smith at amirix.com
Mon May 26 17:58:56 CEST 2003
What about in the case where you are loads-ing directly to a flash
region? I ran across this problem recently (albeit it with PPCBoot-2.0.0).
> -----Original Message-----
> From: u-boot-users-admin at lists.sourceforge.net
> [mailto:u-boot-users-admin at lists.sourceforge.net]On Behalf Of Wolfgang
> Sent: May 26, 2003 11:46 AM
> To: Christophe.LINDHEIMER at fr.thalesgroup.com
> Cc: u-boot-users at lists.sourceforge.net
> Subject: Re: [U-Boot-Users] Loads function and flow control.
> Dear Christophe,
> in message
> <D96E2AFA0DF3D211B1390090274549480373629A at helios.gnv.tcc.thomson-c
> sf.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.
> Best regards,
> Wolfgang Denk
> Software Engineering: Embedded and Realtime Systems, Embedded Linux
> Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de
> panic: can't find /
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