[Linux-usb-users] Newbe

[Roger Hosto]

Okay I am a novice in hardware programming, but I have always heard and readed that if there is something you want in linux and no one else has done it try it yourself. So I did.

Here is my problem. I am writing a usb driver for x10 cm19a usb Wireless Transceiver. It is a simple device that tranmits and receive X10 protocols. I have got everything working accept I have a problem with the read control.
Here is what I have tried.


/* do an immediate bulk read to get data from the device*/
retval = usb_bulk_msg (dev->udev,
usb_rcvbulkpipe (dev->udev, dev->bulk_in_endpointAddr),
dev->bulk_in_buffer,
dev->bulk_in_size,
&count,
dev->bulk_in_bInterval*2);//increased by a factor of 2 to improve data received

This works fine, but I receive the following error
kernel: usb_control/bulk_msg: timeout

So I tried the following to get rid of the error. which works but it jacks my Processor up to 100%.
/* check and make sure that read hasn't been submit yet*/
if(dev->read_urb->status == 0 ||
dev->read_urb->status == -ENOENT)
{
usb_fill_int_urb(dev->read_urb,
dev->udev,
usb_rcvbulkpipe(dev->udev,dev->bulk_in_endpointAddr),
dev->bulk_in_buffer,
count,
cm19a_read_bulk_callback,
dev,
dev->bulk_in_bInterval);

retval = usb_submit_urb(dev->read_urb);
}
Any help would be cool.
I am using Linux 2.4.18-3 #1 Thu Apr 18 07:32:41 EDT 2002 i686 unknown

Thanks,
Roger Hosto.
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