greg k-h wrote:
> As a side note, who makes this cash drawer?
IBM.
And no, I am not going to attach it to my laptop. :)
About control pipes. It doesn't work. This idea
is stopped until I get more information from IBM.
I am quite new to USB programming so please be patient
and answer some newbie questions.
1. creating pipes
I have enpoint settings (usbview):
Endpoint Address: 81
Direction: in
Attribute: 3
Type: Int.
Max Packet Size: 8
Interval: 32ms
Can I write to this endpoint or only read (Direction: in)?
How to create pipe?
usb_sndintpipe(dev, endpoint="Endpoint Address") - (Type: Int.)?
But in [1] we can read that endpoint is between 1 and 15.
2. EMSGSIZE
When I try to submit URB filled with:
FILL_INT_URB(purb, data.dev, usb_sndintpipe(data.dev, data.ep_A),
buff, 8, drawer_complete, &data, data.int_A*HZ);
where data.{ep,int}_A is address and interval of the endpoint then
I am getting -EMSGSIZE. In [1] we can read that we get it when
"Endpoint message size is zero" and "do interface/alternate setting".
Should I use usb_set_interface? But I have only one alternate setting
which is current alternate setting so it is set, right?
Please help!
wrobell <[EMAIL PROTECTED]>
[1] "Programming Guide for Linux USB Device Drivers"
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