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76 lines
2.2 KiB
76 lines
2.2 KiB
/* USB MIDI Sync Box
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*
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* This example demonstrates how to change the USB MIDI
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* device name on Teensy LC and 3.x. When creating more
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* that one MIDI device, custom names are much easier to
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* use when selecting each device in MIDI software on
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* your PC or Mac. The custom name is in the "name.c" tab.
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*
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* Windows and Macintosh systems often cache USB info.
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* After changing the name, you may need to test on a
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* different computer to observe the new name, or take
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* steps to get your operating system to "forget" the
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* cached info. (TODO: wanted... can anyone contribute
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* instructions for these systems)
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*
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* You must select MIDI from the "Tools > USB Type" menu
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*
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* This example code is in the public domain.
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*/
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#include <uClock.h>
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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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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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bpm_blink_timer = 1;
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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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usbMIDI.sendRealTime(usbMIDI.Clock);
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handle_bpm_led(tick);
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}
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void onClockStart() {
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usbMIDI.sendRealTime(usbMIDI.Start);
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}
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void onClockStop() {
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usbMIDI.sendRealTime(usbMIDI.Stop);
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}
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void setup() {
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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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// drift for USB Teensy
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uClock.setDrift(1);
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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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}
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