Merge pull request #2131 from adafruit/midi_foot_pedal

adding code for midi foot pedal

Author: TheKitty

MIDI_Foot_Pedal/code.py

@@ -0,0 +1,45 @@
+# SPDX-FileCopyrightText: 2022 Liz Clark for Adafruit Industries
+# SPDX-License-Identifier: MIT
+
+import board
+import usb_midi
+import adafruit_midi
+import simpleio
+from analogio import AnalogIn
+from adafruit_midi.control_change import ControlChange
+
+#  midi setup
+midi = adafruit_midi.MIDI(
+    midi_in=usb_midi.ports[0], in_channel=0, midi_out=usb_midi.ports[1], out_channel=0
+)
+
+#  potentiometer setup
+mod_pot = AnalogIn(board.A0)
+
+#  function to read analog input
+def val(pin):
+    return pin.value
+
+#  variables for last read value
+#  defaults to 0
+#  no pitchbend is 8192
+mod_val2 = 0
+
+while True:
+
+    #  uncomment below to print potentiometer values in the REPL
+    #  print("{}".format(mod_pot.value))
+
+    #  map range of potentiometer input to midi values
+    mod_val1 = round(simpleio.map_range(val(mod_pot), 41200, 58500, 0, 127))
+
+    #  if modulation value is updated...
+    if abs(mod_val1 - mod_val2) > 2:
+        #  update mod_val2
+        mod_val2 = mod_val1
+        #  create integer
+        modulation = int(mod_val2)
+        #  create CC message
+        modWheel = ControlChange(1, modulation)
+        #  send CC message
+        midi.send(modWheel)