Teensy UART MIDI Input Skeleton Code

// Teensy UART MIDI Input

// MIDI input variables
byte channel;
byte pitch;
byte velocity;
byte ccnumber;
byte ccvalue;
byte ccvalue2;
byte bendLSB;
byte bendMSB;
byte rstat;
byte dataIn;
int flag_previous = 0;

// Initialise hardware

HardwareSerial Uart = HardwareSerial();



void setup() {
  Uart.begin(31250);
}




void loop() { 
    if(Uart.available() > 0) {

    dataIn = Uart.read();
    if(dataIn < 0x80 && flag_previous == 0) {
      doMidiIn(rstat);
    }
    doMidiIn(dataIn);
  }
}

void doNote(byte channel, byte pitch, byte velocity) {
}

void doNoteOff(byte channel, byte pitch, byte velocity) {
}


void doCC(byte channel, byte ccnumber, byte ccvalue) {
}

void doBend(byte channel, unsigned int bend_usb) {
}






void doMidiIn(byte data) {
    
    // running status set
   
   if((data >= 0x80) && (data < 0xf0) && (flag_previous == 0)) {
     rstat = data;
   }
   
    // deal with note on
    if((data >= 0x90) && (data < 0xa0) && (flag_previous == 0)) {
      channel = data & B00001111;
      flag_previous = 1;
    }
    else if((data < 0x80) && (flag_previous == 1)) {     
      pitch = data;
      flag_previous = 2;
    }
    else if((data < 0x80) && (flag_previous == 2)) {
      velocity = data;
      doNote(channel, pitch, velocity);
      flag_previous = 0;
    }
    // done with note on

    // deal with note off (as discrete status byte)
    else if((data >= 0x80) && (data < 0x90) && (flag_previous == 0)) {
      channel = data & B00001111;
      flag_previous = -1;
    }
    else if((data < 0x80) && (flag_previous == -1)) {
      pitch = data;
      flag_previous = -2;
    }
    else if((data < 0x80) && (flag_previous == -2)) {
      velocity = data;
      doNoteOff(channel, pitch, velocity);
      flag_previous = 0;
    }
    // done with note off (as discrete status byte)

    // deal with cc data
    else if((data >= 0xb0) && (data < 0xc0) && (flag_previous == 0)) {
      channel = data & B00001111;
      flag_previous = 3;
    }
    else if((data < 0x80) && (flag_previous == 3)) {
      ccnumber = data;
      flag_previous = 4;
    }
    else if((data < 0x80) && (flag_previous == 4)) {
      ccvalue = data;
        doCC(channel, ccnumber, ccvalue);
      flag_previous = 0;
    }
    // done with cc data

    // deal with bend data
    else if((data >= 0xe0) && (data < 0xf0) && (flag_previous == 0)) {
      channel = data & B00001111;
      flag_previous = 5;
    }
    else if((data < 0x80) && (flag_previous == 5)) {
      bendLSB = data;
      flag_previous = 6;
    }
    else if((data < 0x80) && (flag_previous == 6)) {
      bendMSB = data;
      doBend(channel, bendLSB + (bendMSB << 7));
      flag_previous = 0;
    }
    // done with bend data
   
}