MobileRead Forums - View Single Post - Puzzling behavior while connecting a PS/2 keyboard to Kindle

KindleMeAndrey · 01-26-2017, 09:50 PM

I'm still not sure what you mean by "part number".

Here's what I'm using in this setup:
Kindle 3
Teensy++ 2.0
20-Pin 0.5mm pitch breakout adapter
20-pin 0.5mm pitch cable
PS/2 keyboard with a PS/2 adapter (but that's irrelevant, since it's just key input to be reinterpreted by Teensy)
Jumper cables

Also, upon further investigation, I'm noticing that the "gibberish" codes are actually codes as if all the row pins (1,2,3,4,5,6,20) are active. Thus triggering pin 12, it gives me the output (more or less) of it being shorted with pins 1,2,3,4,5 and 6: "qoj8b". Per chart linked in my first post: Q=2+12, O=3+12, J=4+12. The last two characters are a bit of a mystery, since it's supposed to trigger Back=5+12 and Space=6+12 and I don't think the two of them would make "8b", but it's pretty close.

Now how to make the row pins "inactive" by default...

01-26-2017, 09:50 PM	#9
KindleMeAndrey Enthusiast Posts: 43 Karma: 10 Join Date: Dec 2016 Device: Kindle 3 Keyboard	I'm still not sure what you mean by "part number". Here's what I'm using in this setup: Kindle 3 Teensy++ 2.0 20-Pin 0.5mm pitch breakout adapter 20-pin 0.5mm pitch cable PS/2 keyboard with a PS/2 adapter (but that's irrelevant, since it's just key input to be reinterpreted by Teensy) Jumper cables Also, upon further investigation, I'm noticing that the "gibberish" codes are actually codes as if all the row pins (1,2,3,4,5,6,20) are active. Thus triggering pin 12, it gives me the output (more or less) of it being shorted with pins 1,2,3,4,5 and 6: "qoj8b". Per chart linked in my first post: Q=2+12, O=3+12, J=4+12. The last two characters are a bit of a mystery, since it's supposed to trigger Back=5+12 and Space=6+12 and I don't think the two of them would make "8b", but it's pretty close. Now how to make the row pins "inactive" by default...