XIAO MIDI Synthesizer RP2040 USB midi

midi_seed_rp2040.ino

#include <Arduino.h>
#include <Adafruit_TinyUSB.h>
#include <MIDI.h>

#include "SAM2695Synth.h"

#include <SoftwareSerial.h>
SoftwareSerial SSerial(D7, D6); // RX, TX
#define COM_SERIAL SSerial
SAM2695Synth<SoftwareSerial> synth = SAM2695Synth<SoftwareSerial>::getInstance();

// USB MIDI object
Adafruit_USBD_MIDI usb_midi;

void setup() {
  usb_midi.begin();
  SSerial.begin(31250);
}

void loop() {
  uint8_t packet[4];
  if(usb_midi.available() > 0){
    usb_midi.readPacket(packet);
    SSerial.write(packet, 4);
  }
}