Refactored for teensy 4.0, xEvi hardware

- Switched to platformio, ino -> cpp
- MPRLS for pressure sensor
- Added basic ICM support
- Removed widi, battery, other features not supported in xEvi
- Removed legacy options/processing
- Added LED strip support
- Added encoder support
- Reworked menu code to use encoders/be more flexible

NuEVI/platformio.ini

@@ -1,16 +1,23 @@
-; PlatformIO Project Configuration File
-;
-;   Build options: build flags, source filter
-;   Upload options: custom upload port, speed and extra flags
-;   Library options: dependencies, extra library storages
-;   Advanced options: extra scripting
-;
-; Please visit documentation for the other options and examples
-; https://docs.platformio.org/page/projectconf.html
-
-[env:teensy31]
-platform = teensy
-board = teensy31
-framework = arduino
-build_flags = -D USB_MIDI -D TEENSY_OPT_FASTER
-board_build.f_cpu = 96000000L
+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[env:teensy40]
+platform = teensy
+board = teensy40
+framework = arduino
+build_flags = -D USB_MIDI_SERIAL -D TEENSY_OPT_FASTER
+board_build.f_cpu = 528000000L
+lib_deps = 
+	adafruit/Adafruit MPR121@^1.1.1
+	adafruit/Adafruit MPRLS Library@^1.2.0
+	adafruit/Adafruit SSD1306@^2.5.7
+	mkalkbrenner/WS2812Serial@^0.1.0
+	adafruit/Adafruit ICM20X@^2.0.5
+	paulstoffregen/Encoder@^1.4.2