wulfboy-95/code.py

## code.py
# Copyright wulfboy_95 2021, All Rights Reserved.

# Copying and distribution of this file, with or without modification,
# are permitted in any medium without royalty provided the copyright
# notice and this notice are preserved.  This file is offered as-is,
# without any warranty.

import board
import digitalio
import struct
import usb_hid

#from adafruit_hid.keyboard import Keyboard
from adafruit_hid.keycode import Keycode

# Create and init keyboard USB HID device.
keeb = None
for dev in list(usb_hid.devices):
    if ((dev.usage == 0x06) and
        (dev.usage_page == 0x01) and
        hasattr(dev, "send_report")):
        keeb = dev
if keeb == None:
    raise Exception("Device cannot be found")

# 2D list to convert keyboard matrix to keycode
matrix = [
    [
        Keycode.ESCAPE, Keycode.ONE, Keycode.TWO, Keycode.THREE, Keycode.FOUR,
        Keycode.FIVE, Keycode.SIX, Keycode.SEVEN, Keycode.EIGHT, Keycode.NINE,
        Keycode.ZERO, Keycode.MINUS, Keycode.EQUALS, Keycode.BACKSPACE,
        Keycode.GRAVE_ACCENT
    ],
    [
        Keycode.TAB, Keycode.Q, Keycode.W, Keycode.E, Keycode.R, Keycode.T,
        Keycode.Y, Keycode.U, Keycode.I, Keycode.O, Keycode.P,
        Keycode.LEFT_BRACKET, Keycode.RIGHT_BRACKET, Keycode.BACKSLASH,
        Keycode.DELETE
    ],
    [
        Keycode.CAPS_LOCK, Keycode.A, Keycode.S, Keycode.D, Keycode.F,
        Keycode.G, Keycode.H, Keycode.J, Keycode.K, Keycode.L,
        Keycode.SEMICOLON, Keycode.QUOTE, Keycode.RETURN, Keycode.ENTER,
        Keycode.PAGE_UP
    ],
    [
        Keycode.LEFT_SHIFT, Keycode.SHIFT, Keycode.Z, Keycode.X, Keycode.C,
        Keycode.V, Keycode.B, Keycode.N, Keycode.M, Keycode.COMMA,
        Keycode.PERIOD, Keycode.FORWARD_SLASH, Keycode.RIGHT_SHIFT,
        Keycode.UP_ARROW, Keycode.PAGE_DOWN
    ],
    [
        Keycode.LEFT_CONTROL, Keycode.LEFT_GUI, Keycode.LEFT_ALT,
        Keycode.SPACE, Keycode.SPACE, Keycode.SPACE, Keycode.SPACEBAR,
        Keycode.SPACE, Keycode.SPACE, Keycode.RIGHT_ALT, Keycode.RIGHT_GUI,
        Keycode.RIGHT_CONTROL, Keycode.LEFT_ARROW, Keycode.DOWN_ARROW,
        Keycode.RIGHT_ARROW
    ],
] # matrix[row][col]

input_pins = (board.GP6, board.GP7, board.GP8, board.GP9,board.GP10) # 5 input rows

input_pin_array = [] # DigitalIO array for inputs.

output_pins = (
    board.GP11, board.GP12, board.GP13, board.GP14, board.GP15,
    board.GP16, board.GP17, board.GP18, board.GP19, board.GP20,
    board.GP21, board.GP22, board.GP26, board.GP27, board.GP28
) # 15 output columns

output_pin_array = [] # DigitalIO array for outputs.

# Initialise DigitalIO pins.
for pin in input_pins:
    key_pin = digitalio.DigitalInOut(pin)
    key_pin.direction = digitalio.Direction.INPUT
    key_pin.pull = digitalio.Pull.DOWN
    input_pin_array.append(key_pin)

for pin in output_pins:
    key_pin = digitalio.DigitalInOut(pin)
    key_pin.direction = digitalio.Direction.OUTPUT
    key_pin.drive_mode = digitalio.DriveMode.PUSH_PULL
    output_pin_array.append(key_pin)

keys_pressed = [] # list for possible n-key rollover upgrade in the future.
report_array = [0x00] * 8

while True:
    for col in range(len(output_pin_array)):
        output_pin_array[col].value = True # Turn on column pin.
        for row in range(len(input_pin_array)):
            if (matrix[row][col] >= 0xE0) and (input_pin_array[row].value): # Check if modifier is pressed
                report_array[0] |= Keycode.modifier_bit(matrix[row][col]) # Add modifier bit to report.
            elif input_pin_array[row].value: # Check if key is pressed.
                keys_pressed.append(matrix[row][col])
        output_pin_array[col].value = False # Turn off column pin.
    if len(keys_pressed) > 6: # Check for Rollover Error
        for i in range(2,8):
            report_array[i] = 0x01 # Add Rollover Error keycode*6 to report.
    else:
        for i in range(6):
            report_array[i+2] = keys_pressed[i] if i < len(keys_pressed) else 0 # Add keycode to report.
    keeb.send_report(struct.pack("8B",*report_array))
    report_array = [0x00] * 8
    keys_pressed = []
	# Copyright wulfboy_95 2021, All Rights Reserved.

	# Copying and distribution of this file, with or without modification,
	# are permitted in any medium without royalty provided the copyright
	# notice and this notice are preserved. This file is offered as-is,
	# without any warranty.

	import board
	import digitalio
	import struct
	import usb_hid

	#from adafruit_hid.keyboard import Keyboard
	from adafruit_hid.keycode import Keycode

	# Create and init keyboard USB HID device.
	keeb = None
	for dev in list(usb_hid.devices):
	if ((dev.usage == 0x06) and
	(dev.usage_page == 0x01) and
	hasattr(dev, "send_report")):
	keeb = dev
	if keeb == None:
	raise Exception("Device cannot be found")

	# 2D list to convert keyboard matrix to keycode
	matrix = [
	[
	Keycode.ESCAPE, Keycode.ONE, Keycode.TWO, Keycode.THREE, Keycode.FOUR,
	Keycode.FIVE, Keycode.SIX, Keycode.SEVEN, Keycode.EIGHT, Keycode.NINE,
	Keycode.ZERO, Keycode.MINUS, Keycode.EQUALS, Keycode.BACKSPACE,
	Keycode.GRAVE_ACCENT
	],
	[
	Keycode.TAB, Keycode.Q, Keycode.W, Keycode.E, Keycode.R, Keycode.T,
	Keycode.Y, Keycode.U, Keycode.I, Keycode.O, Keycode.P,
	Keycode.LEFT_BRACKET, Keycode.RIGHT_BRACKET, Keycode.BACKSLASH,
	Keycode.DELETE
	],
	[
	Keycode.CAPS_LOCK, Keycode.A, Keycode.S, Keycode.D, Keycode.F,
	Keycode.G, Keycode.H, Keycode.J, Keycode.K, Keycode.L,
	Keycode.SEMICOLON, Keycode.QUOTE, Keycode.RETURN, Keycode.ENTER,
	Keycode.PAGE_UP
	],
	[
	Keycode.LEFT_SHIFT, Keycode.SHIFT, Keycode.Z, Keycode.X, Keycode.C,
	Keycode.V, Keycode.B, Keycode.N, Keycode.M, Keycode.COMMA,
	Keycode.PERIOD, Keycode.FORWARD_SLASH, Keycode.RIGHT_SHIFT,
	Keycode.UP_ARROW, Keycode.PAGE_DOWN
	],
	[
	Keycode.LEFT_CONTROL, Keycode.LEFT_GUI, Keycode.LEFT_ALT,
	Keycode.SPACE, Keycode.SPACE, Keycode.SPACE, Keycode.SPACEBAR,
	Keycode.SPACE, Keycode.SPACE, Keycode.RIGHT_ALT, Keycode.RIGHT_GUI,
	Keycode.RIGHT_CONTROL, Keycode.LEFT_ARROW, Keycode.DOWN_ARROW,
	Keycode.RIGHT_ARROW
	],
	] # matrix[row][col]

	input_pins = (board.GP6, board.GP7, board.GP8, board.GP9,board.GP10) # 5 input rows

	input_pin_array = [] # DigitalIO array for inputs.

	output_pins = (
	board.GP11, board.GP12, board.GP13, board.GP14, board.GP15,
	board.GP16, board.GP17, board.GP18, board.GP19, board.GP20,
	board.GP21, board.GP22, board.GP26, board.GP27, board.GP28
	) # 15 output columns

	output_pin_array = [] # DigitalIO array for outputs.

	# Initialise DigitalIO pins.
	for pin in input_pins:
	key_pin = digitalio.DigitalInOut(pin)
	key_pin.direction = digitalio.Direction.INPUT
	key_pin.pull = digitalio.Pull.DOWN
	input_pin_array.append(key_pin)

	for pin in output_pins:
	key_pin = digitalio.DigitalInOut(pin)
	key_pin.direction = digitalio.Direction.OUTPUT
	key_pin.drive_mode = digitalio.DriveMode.PUSH_PULL
	output_pin_array.append(key_pin)

	keys_pressed = [] # list for possible n-key rollover upgrade in the future.
	report_array = [0x00] * 8

	while True:
	for col in range(len(output_pin_array)):
	output_pin_array[col].value = True # Turn on column pin.
	for row in range(len(input_pin_array)):
	if (matrix[row][col] >= 0xE0) and (input_pin_array[row].value): # Check if modifier is pressed
	report_array[0] \|= Keycode.modifier_bit(matrix[row][col]) # Add modifier bit to report.
	elif input_pin_array[row].value: # Check if key is pressed.
	keys_pressed.append(matrix[row][col])
	output_pin_array[col].value = False # Turn off column pin.
	if len(keys_pressed) > 6: # Check for Rollover Error
	for i in range(2,8):
	report_array[i] = 0x01 # Add Rollover Error keycode*6 to report.
	else:
	for i in range(6):
	report_array[i+2] = keys_pressed[i] if i < len(keys_pressed) else 0 # Add keycode to report.
	keeb.send_report(struct.pack("8B",*report_array))
	report_array = [0x00] * 8
	keys_pressed = []