This has been an unreleased project for a while, but I have recently been able to make it releasable.

The Ndless SDK r765 now makes available the *BSD USBDI API to be able to write our own USB device drivers and integrate them to the OS.

HIDn is a set of HID resident drivers (keyboard and mouse) with TI-Nspire OS integration. This means it can be used as an alternative to the calculator's keyboard and pad. Integration with Ndless programs won't work as is but is possible in the future.

Ndless r765 is required by HIDn, make sure to update.

This is an alpha version with several limitations, thank you for your feedback. You may subscribe for future updates on Ndlessly.

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(Credits to Rhombicuboctahedron for the video)

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FAQ

Can both a mouse and a keyboard be used simultaneously?
Yes, with an USB hub. Some hubs seem to make the OS crash though.

Interaction with the scrollbar is not standard.
This is an TI OS bug.

Some buggy tiles appear on the screen when the cursor is moved.
This is a TI OS bug.

Device XYZ doesn't work well.
Please report the exact hardware used and the unexpected behavior.

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Known issues and planned improvements

• The mouse can't go over the top bar
• The mouse cursor doesn't show up in some screens
• Right mouse button will be bound to ctrl+menu
• Mouse wheel will be bound to up/down
• Currently partial keyboard mapping to be entirely reworked
• Random crashes. Please provide any additional helpful info on these.
• Lua programs with timers or scores may display absurd numbers

i will test it right now this is awesome!

Edit:
After dragging the scroll bar the mouse is attached to the bar and can be released with a click (seems logical since the touchpad works like that)
sometimes (most of the time after opening a menu) the cursor disappears but the mouse stays working, and only gets back after rebooting.

i see you used the button presses to handle the mouse, since it won't go into the top bar.

I have used a USB mouse with this and it had no problems, but Apple keyboards dont work.
I'm going to use my calculator running USBpad8x later to test

I have used a USB mouse with this and it had no problems, but Apple keyboards dont work.
I'm going to use my calculator running USBpad8x later to test

my apple keyboard works after plugging it in the second time.

If you make a little stand for the nspire and sit back in a chair and play Lua games, it feels pretty cool
Sadly, this doesn’t work with ndless programs, so no keyboard and Mario cart
And on another note, for some reason all the Lua games have crazy numbers for scores, though that could be nlaunch, ndless or my own calculator

Hayleia: Thanks.

Rhombicuboctahedron: Nice

Edit: can the scroll wheel be implemented as up/down keypresses? Maybe back/forward buttons can be Ctrl+9/3 (pgUp/pgDn)?

Sure, this is planned.

Edit3: got both mouse and keyboard (k360) working at the same time

What do you mean?

Edit4: another request: moving the mouse activates the mouse on-calc so we don't have to swipe the touchpad

Do you mean for example that the cursor should reappear in the My Documents screen after switching to the Graph screen? I don't have an CX, you'll need to give me details for these behaviors.

* Is the mouse scale OK for all of you? Or would moving the mouse more to move the TI-Nspire cursor be better?

* For Ndless programmers who want to update their programs for USB compatibility, you will need to (currently untested):
- Keep the interrupts enabled. We'll need to find a way to get read of the clock cursor.
- Poll for keyboard and cursor events with get_event(). I haven't yet checked if cursor movements are correctly propagated.

It probably acts as a USB hub.
critor also got one work. My 2 hubs strangely make the calculator crash.
Has anyone else had mouse + keyboard work with a standard hub?

sometimes (most of the time after opening a menu) the cursor disappears but the mouse stays working, and only gets back after rebooting.

Is it different than with the touchpad?
Note that any weird behavior of the TI-Nspire OS for the touchpad will reappear as is with USB devices, we can't do much about it.