hello.
Never develop a composite usb driver, Now I will develop a composite
usb-serial driver based on intel pxa270. It connect to windows pc that has
usb driver that create two virtual comm port.
I want to know the usual way to develop gadget driver's side of code,My
plan is like this:
Composite serial gadget driver has on configuration with two interface,
each interface has two endpoint, in&out,corresponding one virtual
serialport. right? If pc want to send data to com1 that set_interface 0
first and set_interface 1 before send data to com2?, but if current
interface is 0, than i want to send data to interface 1's endpoint, Will pc
detect this?
Also confused with compound usb device, Is this a device that has
multiple internal components tied together by an. embedded USB hub? on the
driver , it has multiple configuration and each usb controller one
correspoind to one usb configuration? I don't know why pxa270 usb device
chip is not a compound usb device , but the manual says it support multiple
configuration?
I have not seen any usb gadget driver work on composite device or
compound device.So Is there any known hardware that is compound/composite
device and source code for me to study?
Thank you
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