USB Keyboard/Mouse

[ijabbott]

(05-09-2021 11:55 PM)jfelten Wrote:  As you probably know, a recent firmware update to the Prime introduced 3 new commands for sending/receiving USB signals. I tried attaching a wireless keyboard and mouse bundle to my calculator. I notice that the keyboard sends keystrokes, but the LED doesn't turn on when I press caps lock, and the mouse doesn't send any signals whatsoever. Are there signals I need to send to the keyboard and mouse in order for them to recognize that they are connected?

The LEDs (well at least the traditional Caps-, Num-, and Scroll-lock LEDs) are controlled by the computer, not by the keyboard. So yes, the Prime would need to send something to the keyboard to turn the LEDs on.