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89 lines
2.3 KiB
89 lines
2.3 KiB
/*
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* USB/Uart MIDI Sync Box
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*
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* This example code is in the public domain.
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*
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*/
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#include <Adafruit_TinyUSB.h>
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#include <MIDI.h>
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#include <uClock.h>
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// Instantiate the MIDI interfaces
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Adafruit_USBD_MIDI usb_midi;
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MIDI_CREATE_INSTANCE(Adafruit_USBD_MIDI, usb_midi, MIDI_USB);
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MIDI_CREATE_INSTANCE(HardwareSerial, Serial1, MIDI);
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// Do your rpi 2040 has a ws2812 RGB LED? set the pin!
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// otherwise keep it commented for normal LED_BUILTIN led blinking
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#define WS2812_BUILTIN_LED 16
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uint8_t bpm_blink_timer = 1;
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void handle_bpm_led(uint32_t tick)
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{
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// BPM led indicator
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if ( !(tick % (96)) || (tick == 1) ) { // first of 4 quarter pulse will flash longer
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bpm_blink_timer = 8;
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ledOn();
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} else if ( !(tick % (24)) ) { // each quarter led on
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bpm_blink_timer = 1;
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ledOn();
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} else if ( !(tick % bpm_blink_timer) ) { // get led off
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ledOff();
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}
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}
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// Internal clock handlers
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void onSync24Callback(uint32_t tick) {
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// Send MIDI_CLOCK to external gears
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MIDI.sendRealTime(midi::Clock);
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MIDI_USB.sendRealTime(midi::Clock);
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// blink tempo
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handle_bpm_led(tick);
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}
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void onClockStart() {
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MIDI.sendRealTime(midi::Start);
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MIDI_USB.sendRealTime(midi::Start);
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}
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void onClockStop() {
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MIDI.sendRealTime(midi::Stop);
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MIDI_USB.sendRealTime(midi::Stop);
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}
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void setup() {
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#if defined(ARDUINO_ARCH_MBED) && defined(ARDUINO_ARCH_RP2040)
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// Manual begin() is required on core without built-in support for TinyUSB such as mbed rp2040
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TinyUSB_Device_Init(0);
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#endif
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// Initialize USB midi stack
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MIDI_USB.begin(MIDI_CHANNEL_OMNI);
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// Initialize UART midi stack
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MIDI.begin(MIDI_CHANNEL_OMNI);
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// Initialize builtin led for clock timer blinking
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initBlinkLed();
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// Setup our clock system
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// Inits the clock
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uClock.init();
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// Set the callback function for the clock output to send MIDI Sync message.
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uClock.setOnSync24(onSync24Callback);
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// Set the callback function for MIDI Start and Stop messages.
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uClock.setOnClockStart(onClockStart);
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uClock.setOnClockStop(onClockStop);
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// Set the clock BPM to 126 BPM
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uClock.setTempo(126);
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// Starts the clock, tick-tac-tick-tac..
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uClock.start();
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}
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// Do it whatever to interface with Clock.stop(), Clock.start(), Clock.setTempo() and integrate your environment...
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void loop() {
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// handle midi input?
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MIDI.read();
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MIDI_USB.read();
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}
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