Teensy++ TMK firmware

[ClanK]

im building a custom split kb.
im waiting for my case to come from shapeways will be here monday woot!
so i started playing with the teensy++

tested out the blink programs, and a couple of the button programs
simple non matrix stuff sending pin to ground to send a key.
all good.

then downloaded the tmk firmware.
I know i will have alot of modification, and i think i have a handle on that,
but i just wanted to see the teensy register a keystroke from a matrix
so i compiled one of the prefab keyboard setups tmk comes with.
I looked in matrix.c to find the col pins and row pins.
but when i use a breadboard to connect a valid col & row it doesnt register
any key.

am i missing something obvious?
the only change i made in TMK was to set the correct chip in the makefile
MCU = at90usb1286
and disable NKRO
#NKRO_ENABLE = yes

is something else involved in a matrix keystroke that just completing
the circuit colpin to rowpin?

appending this post to add that i cannot seem to register keystrokes on
any of the matrix based examples in teensyduino like MultiKey or DynamicKeypad

thanks for any help
ClanK

 

[GremlinWrangler]

Getting a matrix to work should be as simple as connecting a row to a column, so something is up there.

First up, I assume you have confirmed that the Teensy works, with blink, serial prints working?

And also dumb question, but this is a Teensy++ you are working with, and you are using the right pin numbering noting that there is Arduino pin numbers and port pin numbers for that one?
https://www.pjrc.com/teensy/pinout.html

 

[PaulStoffregen]

Are you running File > Examples > Keypad > MultiKey as-is, or have you changed anything?

In other words, if I run that example here with a 4x3 keypad, is that a suitable test to reproduce the problem? I have the 4x3 keypad hardware shown on this page sitting in a box. Should be easy to check.

Imagine I might only test once on real hardware to verify, so now's the time to be specific so I end up testing on something similar?

 

[ClanK]

Blink works fine

Examples->Teensy->USB_Keyboard->Buttons = works fine (on setting K+M+J)

Examples->KeyPad->MultiKey = (on setting serial) does not register keys when col pin is connected to row pin.
Paul no changes to MultiKey, and testing was connecting RowPin 2 to Col Pin 8,
where Row Pin 2 is D2 and Col Pin 8 is E0

I do not have a keypad, im just using a jumper on the breadboard to test

-ClanK