This keypad uses the TMK keyboard firmware from https://github.com/tmk/tmk_keyboard

Used Hardware:

• Numeric Keypad, Jelly Comb From Amazon.de
• Pro Micro - 5V/16MHz (Clone)
  • Original from SparkFun

Modifications:

• removed original non programmable keyboard controller from keypad
• removed every resitor and capacitor which is not related to the matrix or numled
• added 1N4148 diodes to switches for N-Key rollover
• connected rows, cols and numled (with original resistor) to the promicro

1. Check out TMK firmware or unzip into subfolder
   • unzip https://github.com/tmk/tmk_keyboard/archive/v2.9.zip into tmk
   • or: clone https://github.com/tmk/tmk_keyboard.git tmk
2. Change into cncpad folder
3. Run make to compile firmware
   • requires avr gcc compiler to be installed
   • on ubuntu this can be achieved by installing gcc-avr and avr-libc
4. flash code into by avr
   • as i am using a linux vm to compile and a windows box for flashing i am using avrdude avrdude -Cavrdude.conf -v -patmega32u4 -cavr109 -PCOM3 -b57600 -D -Uflash:w:cncpad_lufa.hex:i

+---------+---------+---------+---------+
| Del     | Ins     | F9      | F4      |
+---------+---------+---------+---------+
| NumLk   | Shift-X | Shift-Y | Shift-Z |
+---------+---------+---------+---------+
| KP_7    | KP_8    | KP_9    | Minus   |
+---------+---------+---------+---------+
| KP_4    |         | KP_6    | Plus    |
+---------+---------+---------+---------+
| KP_1    | KP_2    | KP_3    |         |
+---------+---------+---------+ ESC     +
|       Strg        | F3      |         |
+-------------------+---------+---------+

Keyboard Shortcuts in WinPC NC

Del. = 4-axis -/left
Ins. = 4-axis +/fight
F3   = start job
F4   = go to XY Zero
F5   = drive manually
F9   = go to parking position
-    = move z-axis up
+    = move z-axis down
ESC  = stop current operation
Strg = faste move with 1-4/6-9

Because this code is derrived from tmk examples the same license is used. GPLv2 or later. Some tmk firmware protocol files are under Modified BSD License.

Third party libraries like LUFA, PJRC and V-USB have their own license respectively.