Re: [Libusb-devel] [Libusb] about libusb_fill_bulk_transfer funcation

[Xiaofan C. <xia...@gm...>]

On Tue, Jan 11, 2011 at 6:02 PM, taco <ta...@gm...> wrote:
> hi,all,
>     My gadget driver have two ep, one for in data and the other for out
> data; they named "ep1in" and "ep2out". new, I use libusb to write a
> program to test my driver, eg. write 256 byte data to the driver, but I
> don't know what is the third [endpoint]
> param I should use. I tried 0x00, 0x01, 0x2, but all failed. I need to
> confirm what value it is.
> I looked at USB spec in ch9.3 about device request. bit 7 use for direction,
> so, D4~D0 use for other;
> it is relate with endpoint

Yes. libusb-1.0 requires the direction bit to be set in the endpoint
address. IN Endpoint 1 will be 0x81, Out Endpoint 1 will be 0x01.
IN Endpoint 3 will be 0x83, Out Endpoint 3  will be 0x03.



-- 
Xiaofan