mirror of https://github.com/midilab/uClock
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/* Uart MIDI Sync Box
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*
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* This example demonstrates how to change the Uart MIDI
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* device name on ESP32 family.
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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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*
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*/ |
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#include <uClock.h> |
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// MIDI clock, start and stop byte definitions - based on MIDI 1.0 Standards.
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#define MIDI_CLOCK 0xF8 |
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#define MIDI_START 0xFA |
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#define MIDI_STOP 0xFC |
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// the blue led
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#define LED_BUILTIN 2 |
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volatile bool _midi_clk_income = false; |
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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 compass step will flash longer
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bpm_blink_timer = 8; |
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digitalWrite(LED_BUILTIN, HIGH); |
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} else if ( !(tick % (24)) ) { // each quarter led on
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bpm_blink_timer = 1; |
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digitalWrite(LED_BUILTIN, HIGH); |
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} else if ( !(tick % bpm_blink_timer) ) { // get led off
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digitalWrite(LED_BUILTIN, LOW); |
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} |
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} |
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// Internal clock handlers
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void ClockOut96PPQN(uint32_t tick) { |
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// Send MIDI_CLOCK to external gears
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//Serial.write(MIDI_CLOCK);
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_midi_clk_income = true; |
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handle_bpm_led(tick); |
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} |
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void onClockStart() { |
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Serial.write(MIDI_START); |
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} |
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void onClockStop() { |
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Serial.write(MIDI_STOP); |
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} |
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void setup() { |
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// Initialize serial communication at 31250 bits per second, the default MIDI serial speed communication:
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Serial.begin(31250); |
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// A led to count bpms
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pinMode(LED_BUILTIN, OUTPUT); |
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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.setClock96PPQNOutput(ClockOut96PPQN); |
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// Set the callback function for MIDI Start and Stop messages.
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uClock.setOnClockStartOutput(onClockStart);
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uClock.setOnClockStopOutput(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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// watch for income signal from uClock to fire the clock over midi
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if (_midi_clk_income) { |
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Serial.write(MIDI_CLOCK); |
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noInterrupts(); |
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_midi_clk_income = false; |
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interrupts(); |
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} |
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} |
@ -1,10 +1,10 @@ |
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name=uClock |
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version=1.1.4 |
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version=1.2.0 |
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author=Romulo Silva <contact@midilab.co> |
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maintainer=Romulo Silva <contact@midilab.co> |
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sentence=BPM clock generator for Arduino platform. |
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paragraph=A Library to implement BPM clock tick calls using hardware interruption. Supported and tested on AVR boards(ATmega168/328, ATmega16u4/32u4 and ATmega2560) and ARM boards(Teensy and Seedstudio XIAO M0) |
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paragraph=A Library to implement BPM clock tick calls using hardware interruption. Supported and tested on AVR boards(ATmega168/328, ATmega16u4/32u4 and ATmega2560) and ARM boards(Teensy, Seedstudio XIAO M0 and ESP32) |
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category=Timing |
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url=https://github.com/midilab/uClock |
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architectures=avr,arm,samd |
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architectures=avr,arm,samd,esp32 |
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includes=uClock.h |
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