The code for the macropad is shared in the Onshape_Macropad git repo.
It covers the basic assembly, links to the parts, and the code. The code as of 20211122 is shown below.
# SPDX-FileCopyrightText: 2021 Sandy Macdonald
#
# SPDX-License-Identifier: MIT
# A simple example of how to set up a keymap and HID keyboard on Keybow 2040.
# You'll need to connect Keybow 2040 to a computer, as you would with a regular
# USB keyboard.
# Drop the keybow2040.py file into your `lib` folder on your `CIRCUITPY` drive.
# NOTE! Requires the adafruit_hid CircuitPython library also!
import board
from keybow2040 import Keybow2040
import usb_hid
from adafruit_hid.keyboard import Keyboard
from adafruit_hid.keyboard_layout_us import KeyboardLayoutUS
from adafruit_hid.keycode import Keycode
# Set up Keybow
i2c = board.I2C()
keybow = Keybow2040(i2c)
keys = keybow.keys
# Set up the keyboard and layout
keyboard = Keyboard(usb_hid.devices)
layout = KeyboardLayoutUS(keyboard)
# A map of keycodes that will be mapped sequentially to each of the keys, 0-15
keymap = [ #MODIFIER, KEY, COLOR
[[Keycode.SHIFT, Keycode.FIVE], (0, 0, 255)], #0,0
[[Keycode.CONTROL, Keycode.C], (255, 255, 0)], #1,0
[[Keycode.SHIFT , Keycode.F], (255, 0, 0)], #2,0
[[Keycode.E], (0, 255, 0)], #3,0
[[Keycode.SHIFT , Keycode.ONE], (0, 0, 255)], #0,1
[[Keycode.CONTROL, Keycode.V], (255, 255, 0)], #1,1
[[Keycode.C], (255, 0, 0)], #2,1
[[Keycode.H], (0, 255, 0)], #3,1
[[Keycode.SPACEBAR], (0, 0, 255)], #0,2
[[Keycode.D], (255, 255, 0)], #1,2
[[Keycode.G], (255, 0, 0)], #2,2
[[Keycode.V], (0, 255, 0)], #3,2
[[Keycode.ESCAPE ], (0, 0, 255)], #0,3
[[Keycode.SHIFT, Keycode.E], (255, 255, 0)], #1,3
[[Keycode.L], (255, 0, 0)], #2,3
[[Keycode.I], (0, 255, 0)], #3,3]
]
# The colour to set the keys when pressed, yellow.
rgb = (255, 255, 0)
# Attach handler functions to all of the keys
for key in keys:
# A press handler that sends the keycode and turns on the LED
@keybow.on_press(key)
def press_handler(key):
keycode = keymap[key.number][0]
print(keycode)
key.set_led(*keymap[key.number][1])
if len(keycode) == 2:
keyboard.send(keycode[0],keycode[1])
else: keyboard.send(keycode[0])
#keycode = keymap[key.number]
#keyboard.send(keycode)
#key.set_led(*rgb)
# A release handler that turns off the LED
@keybow.on_release(key)
def release_handler(key):
key.led_off()
while True:
# Always remember to call keybow.update()!
keybow.update()
The original layout was
3 7 b f
2 6 a e
1 5 9 d
0 4 8 c
The new layout is:
e h v i
S+F c g l
C+C C+V d s+e
S+5 S+1 SB ESC
conceptualhardware.co 