MIDI THRU 示例

MIDI Thru 简单易用。正常工作后，你将能够在两个 MIDI 设备之间安装 Arduino 项目，MIDI IN 到 MIDI OUT，你将能够验证两个设备是否一起运行。如果你能够测量延迟，则会看到由于串行缓冲区捕获和重新发送指令而导致的增加。

// This is a simple MIDI THRU.  Everything in, goes right out.
// This has been validate on an Arduino UNO and a Olimex MIDI Shield  

boolean byteReady; 
unsigned char midiByte;

void setup() {
    // put your setup code here, to run once:
    //  Set MIDI baud rate:
    Serial.begin(31250);
    byteReady = false;
    midiByte = 0;  
}

// The Loop that always gets called...
void loop() {
   if (byteReady) {
        byteReady = false;
        Serial.write(midiByte);
    }
}

// The little function that gets called each time loop is called.  
// This is automated somwhere in the Arduino code.
void serialEvent() {
  if (Serial.available()) {
    // get the new byte:
    midiByte = (unsigned char)Serial.read();
    byteReady = true;
  }
}