Initial Commit

Giant_Mechanical_Keyboard/code.py

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+# Big Control Alt Delete Board
+# Code is written for the Circuit Playground Express board:
+#   https://www.adafruit.com/product/3333
+# Needs the NeoPixel module installed:
+#   https://github.com/adafruit/Adafruit_CircuitPython_NeoPixel
+# Author: Collin Cunningham
+# License: MIT License (https://opensource.org/licenses/MIT)
+
+from digitalio import DigitalInOut, Direction, Pull
+import board
+import time
+import neopixel
+from adafruit_hid.keyboard import Keyboard
+from adafruit_hid.keycode import Keycode
+from adafruit_hid.keyboard_layout_us import KeyboardLayoutUS
+
+pixels = neopixel.NeoPixel(board.NEOPIXEL, 10, brightness=.2)
+pixels.fill((0,0,0))
+pixels.show()
+
+# The pins connected to each switch/button
+buttonpins = [board.A7, board.A5, board.A3]
+# The pins connected to each LED
+ledpins = [board.A6, board.A4, board.A2]
+
+# our array of button & LED objects
+buttons = []
+leds = []
+
+# The keycode sent for each switch/button, will be paired with a control key
+buttonkeys = [Keycode.CONTROL, Keycode.ALT, Keycode.DELETE]
+buttonspressed = [False, False, False]
+buttonspressedlast = [False, False, False]
+
+# the keyboard object!
+kbd = Keyboard()
+# we're americans :)
+layout = KeyboardLayoutUS(kbd)
+
+# make all button pin objects, make them inputs w/pullups
+for pin in buttonpins:
+    button = DigitalInOut(pin)
+    button.direction = Direction.INPUT
+    button.pull = Pull.UP
+    buttons.append(button)
+
+# make all LED objects, make them inputs w/pullups
+for pin in ledpins:
+    led = DigitalInOut(pin)
+    led.direction = Direction.OUTPUT
+    leds.append(led)
+
+# set up the status LED
+statusled = DigitalInOut(board.D13)
+statusled.direction = Direction.OUTPUT
+
+print("Waiting for button presses")
+
+def pressbutton(i):
+    l = leds[i]          # find the switch LED
+    k = buttonkeys[i]    # get the corresp. keycode/str
+    l.value = True       # turn on LED
+    kbd.press(k)         # send keycode
+    
+def releasebutton(i):
+    l = leds[i]          # find the switch LED
+    k = buttonkeys[i]    # get the corresp. keycode/str
+    l.value = False      # turn on LED
+    kbd.release(k)       # send keycode
+    
+def lightneopixels():
+    vals = [0, 0, 0]
+    # if switch 0 pressed, show blue
+    if buttonspressed[0]:
+        vals[2] = 255
+    # if switch 1 pressed, show yellow
+    if buttonspressed[1]:
+        vals[0] = 127
+        vals[1] = 64
+    # if switch 2 pressed, show red
+    if buttonspressed[2]:
+        vals[0] = 255
+    # if all pressed, show white
+    if buttonspressed[0] and buttonspressed[1] and buttonspressed[2]:
+        vals = [255,255,255]
+    # if 0 & 1 pressed, show green
+    if buttonspressed[0] and buttonspressed[1] and not buttonspressed[2]:
+        vals = [0,255,0]
+    pixels.fill((vals[0],vals[1],vals[2]))
+    pixels.show()
+    
+
+while True:
+    # check each button
+    for button in buttons:
+        i = buttons.index(button)
+        if button.value == False:    # button is pressed?
+            buttonspressed[i] = True # save pressed button
+            if buttonspressedlast[i] == False: # was button not pressed last time?
+                print("Pressed #%d" % i)
+                pressbutton(i)
+        else:
+            buttonspressed[i] = False # button was not pressed
+            if buttonspressedlast[i] == True: # was button pressed last time?
+                print("Released #%d" % i)
+                releasebutton(i)
+    lightneopixels()
+    # save pressed buttons as pressed last
+    buttonspressedlast = list(buttonspressed)
+    time.sleep(0.01)
+