Re: Hi all, I'm newbe, so apologize for my stupid questions.

Alle 22:48, venerdì 21 settembre 2007, Alan Stern ha scritto:
>
> 	http://www.linux-usb.org/gadget/
RE:
Maybe I have been not so clear; my Host is runnung Linux Suse 10.1; my device 
is a very poor hardware where I'm tring to emulate a mass storage device but 
without using in it any general purpouse operatin system.

My actual real probelm is the following;
I have enabled on my device the interrupt due by SETUP request by the host;
I receive proprly it and I find it is a Device Descriptor device; so I build 
my 18 byte length device descriptor and I sent it to the host; unfortunately 
my Control Endpoint has a FIFO of only 8 byte; so for trasmetting 18 byte I 
need to trasmit the fist 8 bytes; enabild the interrupt of Tx OK and in the 
interrupt handler trasmit the second 8 byte, waitng the interrupt of Tx Ok 
and trasmit in such last interrupt the last 2 bytes. After that I was 
expected to receive by the host the status stage transaction meaing then  end 
of reception of my Device descriptor by the host.
In the reality I see just one interrupt occurs, and after that I receive the 
status stage by host.
I suppose I do not trasmit correct data, but to be sure of that I need to be 
able to read what the host control endpoint is really receiving.
I tried usbmon, but I did not see anything about my new attached device.

Thanks a lot and best regards


>
> > but I do not know how
> > to see what my device sends to the host controller that is a laptop
> > running linux suse 10.1.
> >
> > What is the way to see on the host controller side which packets really
> > income when my embedded device answer the host request?
>
> See the kernel source file Documentation/usb/usbmon.txt.
>
> Or download the USB Mass-Storage specifications from www.usb.org.
>
> Alan Stern

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