add circuitpy code

circuitpy/boot.py

@@ -0,0 +1,5 @@
+import usb_cdc
+import usb_midi
+
+usb_cdc.enable(console=True, data=True)
+usb_midi.disable()

circuitpy/code.py

@@ -0,0 +1,40 @@
+# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
+# SPDX-License-Identifier: MIT
+"""NeoKey simpletest."""
+import board
+from adafruit_neokey.neokey1x4 import NeoKey1x4
+import busio
+# from digitalio import DigitalInOut, Direction, Pull
+
+from usb_cdc import data
+
+while True:
+    try:
+        i2c_bus = busio.I2C(scl=board.GP27, sda=board.GP26)
+        # int_pin = DigitalInOut(board.GP28)
+        # int_pin.direction = Direction.INPUT
+        # int_pin.pull = Pull.UP
+
+        neokey = NeoKey1x4(i2c_bus, addr=0x30)
+
+        states=[False]*4
+        data.write('R0\n'.encode('utf-8'))
+        data.write('R1\n'.encode('utf-8'))
+        data.write('R2\n'.encode('utf-8'))
+        data.write('R3\n'.encode('utf-8'))
+
+        while True:
+            for i in range(4):
+                if neokey[i] != states[i]:
+                    states[i] = neokey[i]
+                    data.write(f'{"P" if states[i] else "R"}{i}\n'.encode('utf-8'))
+
+            if data.in_waiting > 7:
+                cmd = data.readline().decode()
+                i=int(cmd[0])
+                color=int(cmd[1:7], 16)
+                print(f'i:{i},c:{color}')
+                neokey.pixels[i] = color
+
+    except OSError as e :
+        print(e)