Hi,
bastgiraud <[EMAIL PROTECTED]> writes:
>
> I receive some informations of descriptors from the
> pic16c745which works in interrupt transfer. But I don't
> succeed in receiving the data which is in the buffer with
> linux2.4.20. (that was succeful with windows)
> I have found the structure for the control and the bulk transfer
>
> struct usbdevfs_ctrltransfer {
> __u8 requesttype;
> __u8 request;
> __u16 value;
> __u16 index;
> __u16 length;
> __u32 timeout; /* in milliseconds */
> void *data;};
>
> struct usbdevfs_bulktransfer {
> unsigned int ep;
> unsigned int len;
> unsigned int timeout; /* in milliseconds */
> void *data;};
>
> but I haven't found it for INTERRUPT TRANSFER.
> Could you indicate me where I could find it if It exists.
unfortunately it doesn't exist. You can either
- try to use the bulk functions with an interrupt endpoint
(once upon a time somebody told me that would work),
- try to submit interrupt URBs via usbfs, or
- write a kernel driver (I did that for the LEGO USB Tower).
Depending how it is programmed there might also be a driver,
for example some people use a HID interface for slow USB devices.
Can you tell us what kind of device this is?
Also, there have been some important corrections for interrupt transfers
after 2.4.20, better use a newer kernel.
Cordialement
Jürgen
--
Jürgen Stuber <[EMAIL PROTECTED]>
http://www.jstuber.net/
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