mirror of
https://github.com/felis/USB_Host_Shield_2.0.git
synced 2024-03-22 11:31:26 +01:00
111 lines
2.3 KiB
C++
111 lines
2.3 KiB
C++
/*
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*******************************************************************************
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* Legacy Serial MIDI and USB Host bidirectional converter
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* Copyright (C) 2013-2016 Yuuichi Akagawa
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*
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* for use with Arduino MIDI library
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* https://github.com/FortySevenEffects/arduino_midi_library/
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*
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* Note:
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* - If you want use with Leonardo, you must choose Arduino MIDI library v4.0 or higher.
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* - This is sample program. Do not expect perfect behavior.
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*******************************************************************************
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*/
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#include <MIDI.h>
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#include <usbh_midi.h>
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#include <usbhub.h>
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// Satisfy the IDE, which needs to see the include statment in the ino too.
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#ifdef dobogusinclude
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#include <spi4teensy3.h>
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#include <SPI.h>
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#endif
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//Arduino MIDI library v4.2 compatibility
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#ifdef MIDI_CREATE_DEFAULT_INSTANCE
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MIDI_CREATE_DEFAULT_INSTANCE();
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#endif
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#ifdef USBCON
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#define _MIDI_SERIAL_PORT Serial1
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#else
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#define _MIDI_SERIAL_PORT Serial
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#endif
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//////////////////////////
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// MIDI Pin assign
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// 2 : GND
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// 4 : +5V(Vcc) with 220ohm
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// 5 : TX
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//////////////////////////
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USB Usb;
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USBH_MIDI Midi(&Usb);
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void MIDI_poll();
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void doDelay(unsigned long t1, unsigned long t2, unsigned long delayTime);
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void setup()
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{
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MIDI.begin(MIDI_CHANNEL_OMNI);
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if (Usb.Init() == -1) {
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while (1); //halt
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}//if (Usb.Init() == -1...
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delay( 200 );
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}
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void loop()
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{
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unsigned long t1;
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uint8_t msg[4];
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Usb.Task();
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t1 = micros();
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if ( Usb.getUsbTaskState() == USB_STATE_RUNNING )
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{
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MIDI_poll();
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if (MIDI.read()) {
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msg[0] = MIDI.getType();
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if ( msg[0] == 0xf0 ) { //SysEX
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//TODO
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//SysEx implementation is not yet.
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} else {
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msg[1] = MIDI.getData1();
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msg[2] = MIDI.getData2();
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Midi.SendData(msg, 0);
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}
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}
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}
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//delay(1ms)
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doDelay(t1, micros(), 1000);
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}
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// Poll USB MIDI Controler and send to serial MIDI
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void MIDI_poll()
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{
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byte outBuf[ 3 ];
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uint8_t size;
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if ( (size = Midi.RecvData(outBuf)) > 0 ) {
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//MIDI Output
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_MIDI_SERIAL_PORT.write(outBuf, size);
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}
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}
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// Delay time (max 16383 us)
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void doDelay(unsigned long t1, unsigned long t2, unsigned long delayTime)
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{
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unsigned long t3;
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if ( t1 > t2 ) {
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t3 = (4294967295 - t1 + t2);
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} else {
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t3 = t2 - t1;
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}
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if ( t3 < delayTime ) {
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delayMicroseconds(delayTime - t3);
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}
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}
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