Dual USB/iWRAP output

[BenBergman]

I'm just digging into the code, so maybe this is already available, but I want to make a controller that can function as an iWRAP device, but will switch over to LUFA (or PJRC) USB when connected. I have an ATmega32u4 and a WT-12 breakout. The TMK keyboard firmware seems to have many great features (not least of which is a developer community). If this isn't something already possible, I will look into adding it.

Additionally, I was curious if it is easy to add an external device as a mouse (I have a digital I2C joystick I want to use). Perhaps this is better suited for a separate issue.

[tmk]

I'm sure you can use iWRAP and LUFA stack and switch over them automatically depending on whether wired or wireless.
My code can switch over between USB(V-USB) and iWRAP by pressing special key combination.

My iWRAP stack supports only iWRAP4 firmware(beta), not iWRAP5 yet.

To try my code you need beta version of firmware(at least 4.1.0 build 435) which is not available for public. You should make contact with Bluegiga support to get it. Or you can write code to support iWRAP 5 of course.

The other day, I updated firmware of my Bluegiga module from 4 to 5 and tried to support iWRAP5 but unfortunately it failed :)

Mouse support won't be a big job if you can interface with I2C. You can just use host_mouse_send() to send a mouse report to PC.

[BenBergman]

Cool. Can you point me to the applicable lines of code where you switch between USB and iWRAP?

I'll probably try to get iWRAP 4 working first, but I might look into getting 5 supported later. I have heard there are many nice improvements.

[tmk]

You can switch to VUSB stack by pressing RShift +LShift +U and switch back to iWRAP by pressing RShift + LShift + W.

To change protocol stacks you can use change_driver().
umm, it is terribly messy code...

protocol/iwrap/main.c, around line 288:
// switch to VUSB
change_driver(vusb_driver());
// switch to iWRAP
change_driver(iwrap_driver());

Nice, to support iWRAP5 would be better result.