Adding code for trombone champ controller

Adding CircuitPython code for the Trombone Champ Controller learn guide. Uses an arcade button to send a space bar keypress and a neoslider to send mouse cursor movement

Trombone_Champ_Controller/code.py

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+# SPDX-FileCopyrightText: 2022 Liz Clark for Adafruit Industries
+# SPDX-License-Identifier: MIT
+
+import time
+import board
+from digitalio import DigitalInOut, Direction, Pull
+from adafruit_debouncer import Debouncer
+import usb_hid
+from adafruit_hid.keyboard import Keyboard
+from adafruit_hid.keycode import Keycode
+from adafruit_hid.mouse import Mouse
+from rainbowio import colorwheel
+from adafruit_seesaw.seesaw import Seesaw
+from adafruit_seesaw.analoginput import AnalogInput
+from adafruit_seesaw import neopixel
+
+# LED for button
+led = DigitalInOut(board.A0)
+led.direction = Direction.OUTPUT
+
+#  button setup
+key_pin = DigitalInOut(board.A1)
+key_pin.direction = Direction.INPUT
+key_pin.pull = Pull.UP
+switch = Debouncer(key_pin)
+
+# button to toot in the game (can be any key or a mouse click)
+key_pressed = Keycode.SPACE
+
+# keyboard object
+time.sleep(1)  # Sleep for a bit to avoid a race condition on some systems
+keyboard = Keyboard(usb_hid.devices)
+
+#  mouse object
+mouse = Mouse(usb_hid.devices)
+
+# NeoSlider Setup
+neoslider = Seesaw(board.STEMMA_I2C(), 0x30)
+pot = AnalogInput(neoslider, 18)
+pixels = neopixel.NeoPixel(neoslider, 14, 4, pixel_order=neopixel.GRB)
+
+#  scale pot value to rainbow colors
+def potentiometer_to_color(value):
+    return value / 1023 * 255
+
+#  last value of the potentiometer
+last_value = 0
+#  difference between last_value and current value
+diff = 0
+#  mouse movement sensitivity
+#  increase value for faster movement, decrease for slower
+mouse_sensitivity = 8
+
+while True:
+	#  read the slide pot's value (range of 0 to 1023)
+    y = pot.value
+	#  debouncer update
+    switch.update()
+    # colorwheel for neoslider neopixels
+    pixels.fill(colorwheel(potentiometer_to_color(pot.value)))
+	#  if button released
+    if switch.rose:
+		#  turn off button LED
+        led.value = False
+		#  release all keyboard keys
+        keyboard.release_all()
+	#  if button pressed
+    if switch.fell:
+		#  turn on button LED
+        led.value = True
+		#  press the space bar
+        keyboard.press(key_pressed)
+	#  if the current value of the pot is different from the last value
+    if y != last_value:
+		#  if the last value was bigger
+        if last_value > y:
+			#  find the difference
+            diff = abs(last_value - y)
+			#  divide by 10
+            diff = diff / 10
+			#  move cursor negative for range of difference
+            for i in range(diff):
+                mouse.move(y=-(mouse_sensitivity))
+		#  if last value was smaller
+        if last_value < y:
+			#  find the difference
+            diff = abs(last_value - y)
+			#  divide by 10
+            diff = diff / 10
+			#  move cursor positive for range of difference
+            for i in range(diff):
+                mouse.move(y=mouse_sensitivity)
+		#  reset last value
+        last_value = y
+	#  if value is 0
+    if y == 0:
+		#  slight movement
+        mouse.move(y=-2)
+	#  if value is 1023
+    if y == 1023:
+		#  slight movement
+        mouse.move(y=2)