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Message
From: Marc Reinig<mreinig@p...>
Date: Fri Feb 6 17:02:24 CET 2004
Subject: [usb] Help about
Interface descriptors are transferred as part of the configuration
descriptor. GetDescriptor(configuration) is the way.
What do you mean "modify" the interface descriptor?
Set_Interface allows the host to select from alternate interfaces, if they
exist, for a given configuration. It is an optional command.
http://www.semiconductors.philips.com/acrobat/usermanuals/UM10028_1.pdf
might help for how to connect it.
Marc Reinig
System Solutions
Windows Driver and Embedded Product Consulting
> -----Original Message-----
> From: usb-bounces@o...
> [mailto:usb-bounces@o...]On Behalf Of Lifeng Chen
> Sent: Thursday, February 05, 2004 7:45 PM
> To: Discussion list about free,open source USB IP core
> Subject: [usb] Help about
>
>
> Hi all,
> Can anyone help me out with these questions:
>
> 1. It's said in the USB2.0 spec section 9.6.5 (P267)
> that,"Interface descriptors cannot be directly accessed with a
> GetDescriptor() or SetDescriptor() request." So my question is:
> can I access them indirectly? and how?
>
> e.g. if I wanna modify an Interface descriptor, call the
> GetDescriptor() ? give me some details pls.
>
> 2.I'm developing an OTG device. which will interface USB bus via
> philips ISP1301. However I can't find the datasheet at philips
> website or anywhere else. Anyone has idea about the I2C
> transceiver interface? and send me a copy of the datasheet?
>
>
> many thx
>
>
> Joe
>
> Feb 6th.
>
> _______________________________________________
> http://www.opencores.org/mailman/listinfo/usb
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