Thank you...
I am using usb_sndbulkpipe in usb_bulg_msg
the return value of the usb_bulk_msg is also a positive number. But there is
no response from
the device.. Can suggest some free tools to monitor the data on USB in
Linux.
Thanks in advance....
From: Alan Stern <[EMAIL PROTECTED]>
To: Kiran Jammula <[EMAIL PROTECTED]>
CC: USB development list <linux-usb-devel@lists.sourceforge.net>1
Subject: Re: [linux-usb-devel] negative pipe value.....
Date: Tue, 22 Nov 2005 10:33:47 -0500 (EST)
On Tue, 22 Nov 2005, Kiran Jammula wrote:
> Hi,
> I am developing Linux Host driver for a Device. The device has suppiled
> Windows based driver. After connecting the device to PC the probe
function
> in my driver is being called. But pipe opened by using
> usb_sndbulkpipe,usb_rcvbulkpipe ,usb_sndctrlpipe,usb_rcvctrlpipe is
showing
> negative value.
Those are macros; they don't open anything. They are _supposed_ to return
negative values.
> For the out end point device which function to be used..
What OUT endpoint? For an OUT bulk endpoint, use usb_sndbulkpipe. For an
OUT control endpoint (i.e., endpoint 0), use usb_sndctrlpipe.
Alan Stern
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