eldk and usb to serial converters

Daniel Stonier d.stonier at gmail.com
Tue Apr 22 14:23:57 EST 2008

Just discovered that this morning! Had made the assumption it was
automatically enabled, but only clued onto it when I noticed udevmonitor
wasn't giving only UEVENT output, not UDEV output. Should have been obvious,
but I kept barking up the wrong tree!

So, turning out to be a good chance to learn how the lower levels of a linux
system work and managed to learn exactly how udev works while stumbling on
this one.
Thanks for the reply

2008/4/21 Detlev Zundel <dzu at denx.de>:

> Hi Daniel,
> > I'm currently trying to compile a kernel for an AMCC440EP board within
> an eldk
> > environment. We've got a FTDI usb2serial converter we need to connect to
> the
> > board. Now I've compiled a kernel on a gentoo machine for this device
> and had
> > no problems. With this board, the kernel recognizes the device fine:
> >
> > ftdi_sio 1-1:1.0: FTDI USB Serial Device converter detected
> > usb 1-1: FTDI USB Serial Device converter now attached to ttyUSB0
> > drivers/usb/serial/ftdi_sio.c: v1.4.3:USB FTDI Serial Converters Driver
> >
> > but udev doesn't actually make the ttyUSB0 node. If anyone knows what
> may have
> > caused the problem and how to fix it, it'd be much appreciated.
> Maybe udev isn't running at all?  The ELDKs including udev disable it
> per default (what version are you using?).  Embedded systeme like to
> have static kernel configurations presenting no surprises at runtime...
> Cheers
>  Detlev
> --
> Programming X-Windows is like trying to find the square root of pi
> using roman numerals.
>                                          -- The UNIX Haters Handbook
> --
> DENX Software Engineering GmbH,      MD: Wolfgang Denk & Detlev Zundel
> HRB 165235 Munich,  Office: Kirchenstr.5, D-82194 Groebenzell, Germany
> Phone: (+49)-8142-66989-40 Fax: (+49)-8142-66989-80 Email: dzu at denx.de
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