Arduino做midi键盘出现问题

用Arduino做的midi键盘，然后用loopmidi来生成port口，然后再用hairlessMidi来转换，但是出现问题，求大神解决！

+0.89 - Warning: got a status byte when we were expecting 1 more data bytes, sending possibly incomplete MIDI message 0x80


可能是串口的收发不稳定？


void setup() {
  // Set MIDI baud rate:
  Serial.begin(31250);
}

void loop() {
  // play notes from F#-0 (0x1E) to F#-5 (0x5A):

    //Note on channel 1 (0x90), some note value (note), middle velocity (0x45):
    noteOn(0x90, 0x3C, 0x45);
    delay(100);
    //Note on channel 1 (0x90), some note value (note), silent velocity (0x00):
    noteOn(0x90, 0x3C, 0x00);
    delay(100);
    Serial.write(cmd, ,pitch, ,velocity);
}

// plays a MIDI note. Doesn't check to see that cmd is greater than 127, or that
// data values are less than 127:
void noteOn(int cmd, int pitch, int velocity) {
  Serial.write(cmd);

  Serial.write(pitch);

  Serial.write(velocity);
}
这是上面的示例程序

Arduino只有ATMega32U4,ATMega8U4（如Pro mini，Pro micro，Leonardo）才支持USB MIDI哦

arduino leonardo性价比高