USB - assigning custom endpoints

[Gabriele]

Hi,
I need to setup a vendor specific class USB device driver.
The driver shall present the following data endpoint:

0x84 for Bulk IN endpoint
0x03 for Bulk OUT endpoint

Most of the available Zephyr samples have a data endpoint with address 0x81 and 0x01.
Is there a way to change the descriptor addresses ?

[Kenneth]

I did a quick search for ep_addr, and could find that most USB class drivers seems to have defines for this, I don't see any reason why you can't change them. Also see: https://docs.zephyrproject.org/latest/services/usb/uds.html 

Kenneth

[Gabriele]

It doesn't work .I already checked it out.
If I set

#define LOOPBACK_OUT_EP_ADDR 0x03
#define LOOPBACK_IN_EP_ADDR 0x84

I always get
$ lsusb -d 1211:000B -v
Endpoint Descriptor:
..
bEndpointAddress 0x81 EP 1 IN
..
bEndpointAddress 0x01 EP 1 OUT

Gabriele

[Kenneth]

You are right, it looks like usb_validate_ep_cfg_data() in usb_fix_descriptor() from usb_descriptor.c does ensure ep_addr are sequentially mapped. So I guess you will need to edit that implementation in usb_validate_ep_cfg_data() if you want to override this in some way.

Kenneth