C++ API Overview

Use this reference while building native Matrix OS applications. Start with the app guide, then jump into the API pages that match the behavior you are adding.

Recommended Reading Order

Need	Start Here
Read device input	Input
Draw LEDs	LED
Send or receive MIDI	MIDI
Save settings	NVS
Read or write files	FileSystem
Control app/system behavior	System
Work with USB, HID, or logs	USB, HID, Logging
Build on-screen menus	UI Framework
Use shared value types	Types
Use helper utilities	Utilities

App Loop Pattern

Native apps should keep Loop() cooperative: drain input or MIDI events, update app state, draw only when needed, then return so Matrix OS can continue running other work.

void MyApp::Loop() {
  InputEvent event;
  while (MatrixOS::Input::Get(&event))
  {
    if (event.inputClass == InputClass::Keypad)
    {
      // Update app state from event.keypad.
    }
  }
}

For a complete minimal native app, start with Code Your Application (C++). If you are updating older native code, read Migration From 3.x to 4.x after you understand the current Input API.