You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
uClock/examples/ESP32UartMasterMidiClock/ESP32UartMasterMidiClock.ino

84 lines
2.1 KiB

/* Uart MIDI Sync Box
*
* This example demonstrates how to change the Uart MIDI
* device name on ESP32 family.
*
* This example code is in the public domain.
*
* ...
*
*/
#include <uClock.h>
// MIDI clock, start and stop byte definitions - based on MIDI 1.0 Standards.
#define MIDI_CLOCK 0xF8
#define MIDI_START 0xFA
#define MIDI_STOP 0xFC
// the blue led
#define LED_BUILTIN 2
volatile bool _midi_clk_income = false;
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, HIGH);
} else if ( !(tick % (24)) ) { // each quarter led on
bpm_blink_timer = 1;
digitalWrite(LED_BUILTIN, HIGH);
} else if ( !(tick % bpm_blink_timer) ) { // get led off
digitalWrite(LED_BUILTIN, LOW);
}
}
// Internal clock handlers
void ClockOut96PPQN(uint32_t tick) {
// Send MIDI_CLOCK to external gears
//Serial.write(MIDI_CLOCK);
_midi_clk_income = true;
handle_bpm_led(tick);
}
void onClockStart() {
Serial.write(MIDI_START);
}
void onClockStop() {
Serial.write(MIDI_STOP);
}
void setup() {
// Initialize serial communication at 31250 bits per second, the default MIDI serial speed communication:
Serial.begin(31250);
// A led to count bpms
pinMode(LED_BUILTIN, OUTPUT);
// Setup our clock system
// Inits the clock
uClock.init();
// Set the callback function for the clock output to send MIDI Sync message.
uClock.setClock96PPQNOutput(ClockOut96PPQN);
// Set the callback function for MIDI Start and Stop messages.
uClock.setOnClockStartOutput(onClockStart);
uClock.setOnClockStopOutput(onClockStop);
// Set the clock BPM to 126 BPM
uClock.setTempo(126);
// Starts the clock, tick-tac-tick-tac...
uClock.start();
}
// Do it whatever to interface with Clock.stop(), Clock.start(), Clock.setTempo() and integrate your environment...
void loop() {
// watch for income signal from uClock to fire the clock over midi
if (_midi_clk_income) {
Serial.write(MIDI_CLOCK);
noInterrupts();
_midi_clk_income = false;
interrupts();
}
}