first commit neocontroller

Author: jedgarpark

NeoController/code.py

@@ -0,0 +1,96 @@
+# SPDX-FileCopyrightText: 2021 john park for Adafruit Industries
+# SPDX-License-Identifier: MIT
+# NeoController: NeoSlider(x4) + NeoKey MIDI input device
+
+import board
+import busio
+from adafruit_simplemath import map_range
+import usb_midi
+import adafruit_midi
+from adafruit_midi.control_change import ControlChange
+from adafruit_midi.note_on import NoteOn
+from adafruit_midi.note_off import NoteOff
+from adafruit_seesaw.seesaw import Seesaw
+from adafruit_seesaw import neopixel
+from adafruit_seesaw.analoginput import AnalogInput
+from adafruit_neokey.neokey1x4 import NeoKey1x4
+
+i2c = busio.I2C(board.SCL, board.SDA)  # for QT Py RP2040, use SCL1/SDA1
+
+# --- NeoSlider object setup
+addresses = (0x30, 0x31, 0x32, 0x33)  # cut jumpers to proper addreses (none, A0, A1, A0+A1)
+neosliders = []  # list to hold neoslider objects
+for address in addresses:  # create each neoslider w proper address
+    temp_neosliders = Seesaw(i2c, address)
+    neosliders.append(temp_neosliders)  # append to the list
+
+# --- NeoSlider analog read setup
+analogin_pin = 18  # slider is on this analog pin
+analog_pins = (0, 1)
+analog_inputs = []
+for n in range(len(neosliders)):
+    temp_analog_in = AnalogInput(neosliders[n], analogin_pin)
+    analog_inputs.append(temp_analog_in)
+
+# --- Slider NeoPixels Setup
+PIX_PIN = 14
+PIX_NUM = 4
+pixels = []
+for p in range(len(neosliders)):
+    temp_pix = neopixel.NeoPixel(neosliders[p], PIX_PIN, PIX_NUM)
+    pixels.append(temp_pix)
+    pixels[p].brightness = 1.0
+    pixels[p].fill((20, 20, 0))
+    pixels[p].show()
+
+# --- NeoKey 1x4 Setup --- #
+neokey = NeoKey1x4(i2c, addr=0x38)
+amber = 0x300800
+blue = 0x002040
+red = 0x900000
+neokey.pixels.fill(amber)
+
+keys = [  # neokey (adjust if multiple sets), key number, keypress color, MIDI note
+    (neokey, 0, blue, 40),
+    (neokey, 1, red, 42),
+    (neokey, 2, blue, 43),
+    (neokey, 3, red, 46),
+]
+
+#  states for key presses
+key_states = [False, False, False, False]
+
+
+# --- MIDI setup
+midi = adafruit_midi.MIDI(
+                        midi_in=usb_midi.ports[0],
+                        in_channel=(0),
+                        midi_out=usb_midi.ports[1],
+                        out_channel=0
+)
+cc_numbers = [48, 49, 50, 51]  # pick the CC number for each slider to send over
+
+last_sliders = [0] * len(neosliders)  # list to hold state variables
+
+while True:
+    # check NeoKeys
+    for k in range(len(keys)):
+        neokey, key_number, color, midi_note = keys[k]
+        if neokey[key_number] and not key_states[key_number]:
+            midi.send(NoteOn(midi_note, 127))
+            key_states[key_number] = True
+            neokey.pixels[key_number] = color
+        if not neokey[key_number] and key_states[key_number]:
+            midi.send(NoteOff(midi_note, 0))
+            neokey.pixels[key_number] = amber
+            key_states[key_number] = False
+
+    # check sliders
+    for i in range(len(neosliders)):
+        slider = analog_inputs[i].value
+        if abs(slider - last_sliders[i]) > 1:
+            cc_val = int(map_range(slider, 0, 1023, 0, 127))
+            midi.send(ControlChange(cc_numbers[i], cc_val))
+            color_val = int(map_range(slider, 0, 1023, 5, 255))
+            pixels[i].fill((color_val, color_val, 0))
+            last_sliders[i] = slider