[U-Boot-Users] MPC8280 USB console

[KokHow Teh]

Hi;

> (2) What type of usb connections is neccessary for usbtty to work? I
mean,
> is host PC running usb-host or usb-function and PQ2FADS-ZU running
usb-host
> or usb-function?

WD# Can it operate in device mode?

WD# The PC is a standard USB host, and U-Boot will register itself  as  a
serial device.

According to the MPC8280 Reference Manual, the USB controller, which does
not conform to OHCI and UHCI programming model, operates in 2 modes, USB
Functiona nd USB Host. I guess what you mean with "device mode" would be
USB function mode in this context....

> (3) What type of cable should I use? I assume a Type-A-to-Type-A PC-to-PC

WD# You better check what your hardware allows. Using a A-to-A cable with
hartdware that is not compatible may ruin both your target board  and
the PC.


The only USB connector on the board is a Type-A connector. So I have to use
Type-A-to-Type-A cable. My question is, would this cable naturally be a
cross-connect cable?


Thanks & Regards,
TEH



Wolfgang Denk <wd at denx.de>@denx.de on 08/12/2005 09:12:16 PM

Sent by:    wd at denx.de


To:    "KokHow Teh" <KokHow.Teh at marconi.com>
cc:    u-boot-users at lists.sourceforge.net

Subject:    Re: [U-Boot-Users] MPC8280 USB console


In message <OF148161B0.215740C5-ON4825705B.001BEE4A at uk.marconicomms.com>
you wrote:
>
>       I am trying to bring up the USB controller on PQ2FADS-ZU with
MPC8280
> onboard. I have finished with the initialization and transaction routines
> but not the ones neccessary for usbtty to work. The u-boot-1.1.2 source

Don't use such old code. Please use a current version from  CVS,  for
example CVS tag LABEL_2005_08_12_0050

> tree that I am using is a release version that is definitely not from the
> top of the CVS. I notice that the usbtty is only implemented for the SX1

This will become a major problem if you should ever have any problems
or questions.

> (1) The USB connector on PQ2FADS-ZU is a Type-A connector. Would this
work
> as a console port?

Can it operate in device mode?

> (2) What type of usb connections is neccessary for usbtty to work? I
mean,
> is host PC running usb-host or usb-function and PQ2FADS-ZU running
usb-host
> or usb-function?

The PC is a standard USB host, and U-Boot will register itself  as  a
serial device.

> (3) What type of cable should I use? I assume a Type-A-to-Type-A PC-to-PC

You better check what your hardware allows. Using a A-to-A cable with
hartdware that is not compatible may ruin both your target board  and
the PC.

Best regards,

Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
The only way you could make a happy  marriage  is  by  cuttin'  their
heads  off  as  soon  as  they say `I do', yes? You can't make happi-
ness...                           - Terry Pratchett, _Witches Abroad_