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uClock/examples/RP2040UsbMasterMidiClock/RP2040UsbMasterMidiClock.ino

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/* USB MIDI Sync Box - example that also prints to serial and sends USB midi as well as blinking LED
* (usb part still needs testing to make sure it works!)
*
* This example code is in the public domain.
*
*/
#include <Adafruit_TinyUSB.h>
#include <MIDI.h>
Adafruit_USBD_MIDI usb_midi;
MIDI_CREATE_INSTANCE(Adafruit_USBD_MIDI, usb_midi, MIDI_USB);
//MIDI_CREATE_INSTANCE(HardwareSerial, Serial1, MIDI);
#include <uClock.h>
#define ATOMIC(X) { uint32_t __interrupt_mask = save_and_disable_interrupts(); X; restore_interrupts(__interrupt_mask); }
//#define LED_BUILTIN PIN_LED_B
//#define WAIT_FOR_SERIAL
#define ENABLE_MULTICORE
volatile uint32_t count = 0;
uint8_t bpm_blink_timer = 1;
void handle_bpm_led(uint32_t tick)
{
// BPM led indicator
if ( !(tick % (96)) || (tick == 1) ) { // first compass step will flash longer
bpm_blink_timer = 8;
digitalWrite(LED_BUILTIN, LOW);
} else if ( !(tick % (24)) ) { // each quarter led on
bpm_blink_timer = 1;
digitalWrite(LED_BUILTIN, LOW);
} else if ( !(tick % bpm_blink_timer) ) { // get led off
digitalWrite(LED_BUILTIN, HIGH);
}
}
// Internal clock handlers
void onSync24Callback(uint32_t tick) {
// Send MIDI_CLOCK to external gears
MIDI_USB.sendRealTime(midi::Clock);
handle_bpm_led(tick);
Serial.printf("ticked with %u\n", tick);
}
void onClockStart() {
MIDI_USB.sendRealTime(midi::Start);
}
void onClockStop() {
MIDI_USB.sendRealTime(midi::Stop);
}
#ifdef ENABLE_MULTICORE
void setup1() {
}
void loop1() {
if (count%1000==0)
ATOMIC(Serial.println("loop1()!"); Serial.flush());
}
#endif
void setup() {
#if defined(ARDUINO_ARCH_MBED) && defined(ARDUINO_ARCH_RP2040)
// Manual begin() is required on core without built-in support for TinyUSB such as mbed rp2040
TinyUSB_Device_Init(0);
#endif
MIDI_USB.begin(MIDI_CHANNEL_OMNI);
// A led to count bpms
pinMode(LED_BUILTIN, OUTPUT);
Serial.begin(115200);
#ifdef WAIT_FOR_SERIAL
while (!Serial)
delay(1);
#endif
// wait until device mounted
while( !TinyUSBDevice.mounted() ) {
Serial.println("waiting for usb..");
Serial.flush();
delay(1);
}
// Setup our clock system
// Inits the clock
Serial.println("about to uClock.init()..."); Serial.flush();
uClock.init();
// Set the callback function for the clock output to send MIDI Sync message.
uClock.setOnSync24(onSync24Callback);
// Set the callback function for MIDI Start and Stop messages.
uClock.setOnClockStart(onClockStart);
uClock.setOnClockStop(onClockStop);
// Set the clock BPM to 126 BPM
uClock.setTempo(60);
// Starts the clock, tick-tac-tick-tac..
Serial.println("about to uClock.start()..."); Serial.flush();
uClock.start();
ATOMIC(Serial.println("uClock.start()ed!"); Serial.flush();)
}
// Do it whatever to interface with Clock.stop(), Clock.start(), Clock.setTempo() and integrate your environment...
void loop() {
MIDI_USB.read();
count++;
if (millis()%1000==0)
ATOMIC(Serial.println("loop()!"); Serial.flush(););
}