Arduino读取串口数据并进行字符串分割

String comdata = "";

int numdata[6] = {0}, PWMPin[6] = {3, 5, 6, 9, 10, 11}, mark = 0;

void setup()

{

  for(int i = 0; i < 6; i++) pinMode(PWMPin[i], OUTPUT);

  Serial.begin(9600);

}

void loop()

{

  int j = 0;

  while (Serial.available() > 0)

  {

    comdata += char(Serial.read());

    delay(2);

    mark = 1;

  }

  if(mark == 1)

  {

    Serial.println(comdata);

    Serial.println(comdata.length());

    for(int i = 0; i < comdata.length() ; i++)

    {

      if(comdata[i] == ',')

      {

        j++;

      }

      else

      {

        numdata[j] = numdata[j] * 10 + (comdata[i] - '0');

      }

    }

    comdata = String("");

    for(int i = 0; i < 6; i++)

    {

      Serial.print("Pin ");

      Serial.print(PWMPin[i]);

      Serial.print(" = ");

      Serial.println(numdata[i]);

      analogWrite(PWMPin[i], numdata[i]);

      numdata[i] = 0;

    }

    mark = 0;

  }

}