ash/loopy_midi_controller
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Add second USB MIDI interface (LPX MIDI) for Programmer mode

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- Interface 1 (DAW): Button presses -> Loopy Pro
- Interface 2 (MIDI): SysEx + LED control <- Loopy Pro
- Both interfaces polled in update()
- Sends on DAW interface (like real Launchpad X)
This commit is contained in:
Ashley Strahle
2026-06-25 22:51:44 +00:00
parent c20f1dec2c
commit a209b48720
1 changed files with 49 additions and 18 deletions
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src/midi_transport.cpp
+49 -18
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@@ -2,7 +2,8 @@
#include <Arduino.h>
#include "Adafruit_TinyUSB.h"
static Adafruit_USBD_MIDI usb_midi;
static Adafruit_USBD_MIDI usb_midi_daw; // Interface 1: DAW/Session
static Adafruit_USBD_MIDI usb_midi_midi; // Interface 2: MIDI/Programmer
UsbMidiTransport::UsbMidiTransport() : initialized(false) {
}
@@ -11,27 +12,32 @@ UsbMidiTransport::~UsbMidiTransport() {
}
bool UsbMidiTransport::begin() {
Serial.println("[MIDI] Setting up USB MIDI device...");
Serial.println("[MIDI] Setting up USB MIDI device (dual interface)...");
TinyUSBDevice.setManufacturerDescriptor("Ashley Strahle");
TinyUSBDevice.setProductDescriptor("Loopy Foot Controller");
TinyUSBDevice.setSerialDescriptor("LFMIDI001");
TinyUSBDevice.setManufacturerDescriptor("Novation");
TinyUSBDevice.setProductDescriptor("Launchpad X");
TinyUSBDevice.setSerialDescriptor("LPX00001");
TinyUSBDevice.begin(0);
if (!usb_midi.begin()) {
Serial.println("[MIDI] ERROR: USB MIDI init failed");
// Initialize both MIDI interfaces
if (!usb_midi_daw.begin()) {
Serial.println("[MIDI] ERROR: DAW MIDI init failed");
return false;
}
if (!usb_midi_midi.begin()) {
Serial.println("[MIDI] ERROR: MIDI MIDI init failed");
return false;
}
if (TinyUSBDevice.mounted()) {
Serial.println("[MIDI] Re-enumerating with MIDI interface...");
Serial.println("[MIDI] Re-enumerating with dual MIDI interface...");
TinyUSBDevice.detach();
delay(10);
TinyUSBDevice.attach();
}
initialized = true;
Serial.println("[MIDI] USB MIDI ready - enumerating...");
Serial.println("[MIDI] USB MIDI ready - dual interface enumerating...");
return true;
}
@@ -46,9 +52,10 @@ void UsbMidiTransport::update() {
TinyUSBDevice.mounted() ? "YES" : "NO");
}
while (usb_midi.available()) {
// Poll DAW interface (interface 1)
while (usb_midi_daw.available()) {
uint8_t packet[4];
if (usb_midi.readPacket(packet)) {
if (usb_midi_daw.readPacket(packet)) {
MidiEvent event;
parse_midi_packet(packet, 4, event);
@@ -61,7 +68,31 @@ void UsbMidiTransport::update() {
case MidiEvent::PITCH_BEND: type_str = "PB"; break;
default: break;
}
Serial.printf("[MIDI IN] Ch:%d %s:%d:%d\n", event.channel, type_str, event.data1, event.data2);
Serial.printf("[MIDI IN DAW] Ch:%d %s:%d:%d\n", event.channel, type_str, event.data1, event.data2);
if (receive_callback) {
receive_callback(event);
}
}
}
// Poll MIDI interface (interface 2) - for Programmer mode LED control
while (usb_midi_midi.available()) {
uint8_t packet[4];
if (usb_midi_midi.readPacket(packet)) {
MidiEvent event;
parse_midi_packet(packet, 4, event);
const char* type_str = "UNK";
switch (event.type) {
case MidiEvent::NOTE_ON: type_str = "NOTE_ON"; break;
case MidiEvent::NOTE_OFF: type_str = "NOTE_OFF"; break;
case MidiEvent::CONTROL_CHANGE: type_str = "CC"; break;
case MidiEvent::PROGRAM_CHANGE: type_str = "PC"; break;
case MidiEvent::PITCH_BEND: type_str = "PB"; break;
default: break;
}
Serial.printf("[MIDI IN MIDI] Ch:%d %s:%d:%d\n", event.channel, type_str, event.data1, event.data2);
if (receive_callback) {
receive_callback(event);
@@ -77,22 +108,22 @@ void UsbMidiTransport::on_midi_receive(std::function<void(const MidiEvent&)> cal
void UsbMidiTransport::send_note_on(uint8_t channel, uint8_t note, uint8_t velocity) {
if (!initialized) return;
uint8_t packet[4] = {0x09, (uint8_t)(0x90 | (channel - 1)), note, velocity};
usb_midi.writePacket(packet);
Serial.printf("[MIDI OUT] Ch:%d NOTE_ON:%d:%d\n", channel, note, velocity);
usb_midi_daw.writePacket(packet);
Serial.printf("[MIDI OUT DAW] Ch:%d NOTE_ON:%d:%d\n", channel, note, velocity);
}
void UsbMidiTransport::send_note_off(uint8_t channel, uint8_t note, uint8_t velocity) {
if (!initialized) return;
uint8_t packet[4] = {0x08, (uint8_t)(0x80 | (channel - 1)), note, velocity};
usb_midi.writePacket(packet);
Serial.printf("[MIDI OUT] Ch:%d NOTE_OFF:%d:%d\n", channel, note, velocity);
usb_midi_daw.writePacket(packet);
Serial.printf("[MIDI OUT DAW] Ch:%d NOTE_OFF:%d:%d\n", channel, note, velocity);
}
void UsbMidiTransport::send_cc(uint8_t channel, uint8_t cc, uint8_t value) {
if (!initialized) return;
uint8_t packet[4] = {0x0B, (uint8_t)(0xB0 | (channel - 1)), cc, value};
usb_midi.writePacket(packet);
Serial.printf("[MIDI OUT] Ch:%d CC:%d:%d\n", channel, cc, value);
usb_midi_daw.writePacket(packet);
Serial.printf("[MIDI OUT DAW] Ch:%d CC:%d:%d\n", channel, cc, value);
}
bool UsbMidiTransport::is_connected() {