added MIDI code

Adafruit_Proximity_Trinkey/Proximity_Trinkey_MIDI/code.py

@@ -0,0 +1,74 @@
+# SPDX-FileCopyrightText: 2021 John Park for Adafruit Industries
+# SPDX-License-Identifier: MIT
+"""
+Proximity Trinkey MIDI
+Touch pads switch between CC and Pitch Bend modes
+Blue LED for CC, Red LED for pitchbend
+Brightness of LEDs for proximity
+"""
+import board
+import neopixel
+import touchio
+import usb_midi
+import adafruit_midi
+from adafruit_midi.control_change import ControlChange
+from adafruit_midi.pitch_bend import PitchBend
+
+from adafruit_apds9960.apds9960 import APDS9960
+
+apds = APDS9960(board.I2C())
+apds.enable_proximity = True
+
+touch1 = touchio.TouchIn(board.TOUCH1)
+touch2 = touchio.TouchIn(board.TOUCH2)
+
+pixels = neopixel.NeoPixel(board.NEOPIXEL, 2)
+
+midi = adafruit_midi.MIDI(
+    midi_in=usb_midi.ports[0], in_channel=0, midi_out=usb_midi.ports[1], out_channel=0
+)
+
+CC_NUM = 46  # pick your midi cc number here
+
+def map_range(in_val, in_min, in_max, out_min, out_max):
+    return out_min + ((in_val - in_min) * (out_max - out_min) / (in_max - in_min))
+
+pixels[0] = 0x000000
+pixels[1] = 0x0000FF
+
+prox_pitch = 8192
+last_prox_pitch = prox_pitch
+prox_cc = 0
+last_prox_cc = prox_cc
+prox_bright = 0
+last_prox_bright = prox_bright
+
+mode = True
+
+while True:
+
+    if touch1.value:  # CC mode
+        pixels[0] = 0xBB0000
+        pixels[1] = 0x0
+        mode = False
+
+    if touch2.value:  # pitch bend mode
+        pixels[0] = 0x0
+        pixels[1] = 0x0000FF
+        mode = True
+
+    if mode:
+        prox_cc = int(map_range(apds.proximity, 0, 255, 0, 127))
+        if last_prox_cc is not prox_cc:
+            midi.send(ControlChange(CC_NUM, prox_cc ))
+            print("CC is", prox_cc)
+            last_prox_cc = prox_cc
+    else:
+        prox_pitch = int(map_range(apds.proximity, 0, 255, 8192, 16383))
+        if last_prox_pitch is not prox_pitch:
+            midi.send(PitchBend(prox_pitch))
+            print("Pitch bend is", prox_pitch)
+            last_prox_pitch = prox_pitch
+
+    prox_bright = map_range(apds.proximity, 0, 255, 0.01, 1.0)
+    pixels.brightness = prox_bright