# cs-midi

A standalone pico-sdk extraction of [tttapa/Control-Surface](https://github.com/tttapa/Control-Surface) (GPL-3.0).

cs-midi provides the core MIDI element system, BLE MIDI transport, banks, selectors, and the declarative `Control_Surface` singleton for use with the Raspberry Pi Pico SDK and the CYW43 radio module (BTstack BLE backend).

## Getting Started

```cpp
#include "pico/stdlib.h"
#include "pico/cyw43_arch.h"
#include <cs_midi.h>

using namespace cs;

BluetoothMIDI_Interface midi;

NoteButton button {5, {MIDI_Notes::C[4], Channel_1}};

int main() {
    stdio_init_all();
    if (cyw43_arch_init()) return 1;
    Control_Surface.begin();
    while (true) {
        Control_Surface.loop();
        sleep_ms(1);
    }
}
```

## Differences from Control Surface

- `#include <cs_midi.h>` replaces `#include <Control_Surface.h>`
- `cs::BluetoothMIDI_Interface` replaces `USBMIDI_Interface`
- Standard `main()` with `cyw43_arch_init()` replaces Arduino `setup()`/`loop()`
- All types live in the `cs::` namespace
- No `MCU::` namespace — use raw CC numbers or `MIDI_CC::` constants

## Credits

Original library: [Control Surface](https://github.com/tttapa/Control-Surface) by **Pieter P (tttapa)** (GPL-3.0).
pico-sdk port: [pszsh](https://else-if.org).