Re: [Sdcc-user] USB protocol stack for 8051 ?

[Michael P. <mi...@ro...>]

Hi Robin,

the first thing you should know is that USB is a master slave bus.
I'm really sure that your HP Printer has a USB slave Interface.
So your USB Controller has to be a master.
I only know some of the available USB controller (TUSB3210...)
but I don't know any integrated USB host controller.

And it is definitly not possible to communicate between 2 USB slaves.

best regards
Michael

----- Original Message -----
From: "Robin Randhawa" <rob...@gm...>
To: <sdc...@li...>
Sent: Wednesday, May 14, 2003 3:08 PM
Subject: Re: [Sdcc-user] USB protocol stack for 8051 ?


> Greetings and thanks everyone.
>
> I realise that implementing the USB standard would be overkill.
> What I basically want to do is use some existing implementation.
> I went through the 8051 USB firmware provided by Philips for use with the
> PDIUSBD12 controller, the idea being to hack it and use it somehow.
>
> I still have a basic problem:
> I need to interface with the HP 3325 USB Printer. I, in my finite wisdom,
am
> assuming that each USB printer would use a transaction based scheme that
> would be different for each printer.
>
> How then am I supposed to handhsake and communicate with this printer ?
> Would I need to hack / examine the existing Windoze/Linux drivers for this
> printer ?
>
> Any help would be appreciated as usual.
> Thanks.
>
> Robin.
>
>
>
>
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