Refactor into files

MidiDriver.cpp

@@ -0,0 +1,49 @@
+#include "MidiDriver.h"
+
+// MIDI UART Pins (GP0/GP1)
+#define PIN_MIDI_TX 0
+
+MidiDriver midi;
+
+MidiDriver::MidiDriver() {
+}
+
+void MidiDriver::begin() {
+    mutex_init(&_mutex);
+    Serial1.setTX(PIN_MIDI_TX);
+    Serial1.begin(31250);
+    Serial.println(F("MIDI Serial initialized on GP0/GP1"));
+}
+
+void MidiDriver::lock() {
+    mutex_enter_blocking(&_mutex);
+}
+
+void MidiDriver::unlock() {
+    mutex_exit(&_mutex);
+}
+
+void MidiDriver::sendNoteOn(uint8_t note, uint8_t velocity, uint8_t channel) {
+    uint8_t status = 0x90 | (channel - 1);
+    Serial1.write(status);
+    Serial1.write(note);
+    Serial1.write(velocity);
+}
+
+void MidiDriver::sendNoteOff(uint8_t note, uint8_t channel) {
+    uint8_t status = 0x80 | (channel - 1);
+    Serial1.write(status);
+    Serial1.write(note);
+    Serial1.write((uint8_t)0);
+}
+
+void MidiDriver::sendRealtime(uint8_t status) {
+    Serial1.write(status);
+}
+
+void MidiDriver::panic(uint8_t channel) {
+    uint8_t status = 0xB0 | (channel - 1);
+    Serial1.write(status);
+    Serial1.write(123); // All Notes Off
+    Serial1.write((uint8_t)0);
+}