Add WIP firmware

Author: theacodes

firmware/LICENSE

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+The MIT License (MIT)
+
+Copyright (c) 2020 Alethea Flowers for Winterbloom
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

firmware/code.py

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+# The MIT License (MIT)
+#
+# Copyright (c) 2020 Alethea Flowers for Winterbloom
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+import time
+import audioio
+import analogio
+import board
+import digitalio
+ 
+button = digitalio.DigitalInOut(board.D2)
+button.switch_to_input(pull=digitalio.Pull.UP)
+gate = digitalio.DigitalInOut(board.D0)
+gate.switch_to_input()
+pitch_cv = analogio.AnalogIn(board.A4)
+ 
+wave_file = open("honk-sound.wav", "rb")
+wave = audioio.WaveFile(wave_file)
+audio = audioio.AudioOut(board.A0)
+
+last_button_value = False
+last_gate_value = False
+button_value = None
+gate_value = None
+
+while True:
+    button_value = not button.value
+    gate_value = not gate.value
+
+    if (not last_button_value and button_value) or (not last_gate_value and gate_value):
+        print(pitch_cv.value)
+        wave.sample_rate = int(44100 * ((pitch_cv.value / 65355) + 0.5))
+        audio.play(wave)
+
+    last_button_value = button_value
+    last_gate_value = gate_value