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1  Using Arduino / Networking, Protocols, and Devices / Re: OBD-II help (J1850 PWM) on: February 04, 2013, 03:05:25 pm
Code:
void getResponse(void){
  char inChar=0;
  //Keep reading characters until we get a carriage return
  while(inChar != '\r'){
    //If a character comes in on the serial port, we need to act on it.
    if(Serial1.available() > 0){
      //Start by checking if we've received the end of message character ('\r').
      if(Serial1.peek() == '\r'){
        //Clear the Serial buffer
        inChar=Serial1.read();
        //Put the end of string character on our data string
        rxData[rxIndex]='\0';
        //Reset the buffer index so that the next character goes back at the beginning of the string.
        rxIndex=0;
      }
      //If we didn't get the end of message character, just add the new character to the string.
      else{
        //Get the new character from the Serial port.
        inChar = Serial1.read();
        //Add the new character to the string, and increment the index variable.
        rxData[rxIndex++]=inChar;
      }
    }
  }


Im kinda curious you say that its printing the response before it has been fully received.
who is that possible, as far as i can see it has a while loop that is checking to see if the \r is received
why is that not enough ? how is it escaping from that ? and why will it work to add a flag and another while loop that essentially does the same check?
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