----- Original Message -----
From: "Oliver Neukum" <[EMAIL PROTECTED]>
To: "mama" <[EMAIL PROTECTED]>;
<[EMAIL PROTECTED]>
Sent: Tuesday, August 05, 2003 10:04 AM
Subject: Re: [linux-usb-devel] USB transfer
> Am Dienstag, 5. August 2003 09:10 schrieb mama:
> > Hello
> >
> > Could yout point me a reason why grabbing datas from usb device these
datas
> > includes some incorrect numbers ? Is it synchronization or what ??
> >
> > I put it in my endpoint2 fifo buffer incrementing datas ( from 1 to 64).
> > I wrote a device driver and I use it to read these datas from.
> >
> > I insert fragment of my device driver .. please tell me what I'm doing
wrong
> > ?
> >
> > frame_size = 64 .
> > endpoint_r = 82H .
> >
> > static ssize_t fx2_read (struct file *file, char *buf, size_t count,
loff_t
> > *ppos)
> > {
> > if ( buffersNotAllocated ) AllocateBuffers(); //these are my
> > defined functions
> > ssize_t retval = 0 ;
> > sRead.nOffset = 0;
> > retval=usb_bulk_msg (my_dev, usb_rcvbulkpipe
> > (my_dev,endpoint_r),sRead.pBuff, frame_size, &count, HZ*5);
> > wait_for_urb (sRead.pUrb);
>
> Either use usb_bulk_msg() _or_ submit and wait on an URB.
> Secondarily, you fail to handle AllocateBuffers() failing.
>
I don't exactly understand ... Should I use usb_bulk_msg with usb_submit_urb
?
With handle failed AllocateBuffers you are right ...
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