Sending multiple bytes over wire

Projects Programming
9

I have improved the code, but still have not fixed every problem. I am trying to copy a code from JHaskell's blog. I will aslo send the sender code.

// Wire Master Reader
// by Nicholas Zambetti <http://www.zambetti.com>

// Demonstrates use of the Wire library
// Reads data from an I2C/TWI slave device
// Refer to the "Wire Slave Sender" example for use with this

// Created 29 March 2006

// This example code is in the public domain.
// Written by Nick Gammon
// May 2012

#include <Wire.h>
#define DATABUFFERSIZE      6
char dataBuffer[DATABUFFERSIZE + 1]; //Add 1 for NULL terminator
byte dataBufferIndex = 0;
char startChar = '%'; // or '!', or whatever your start character is
char endChar = '&';

void setup() {
  Wire.begin();        // join i2c bus (address optional for master)
  Serial.begin(9600);  // start serial for output
}
void loop() {
  Wire.requestFrom(8, 6);
  char startChar = '%'; // or '!', or whatever your start character is
  char endChar = '&';
  if (getSerialString()) {
    //String available for parsing.  Parse it here
    boolean getSerialString() {
      static byte dataBufferIndex = 0;
      while (Wire.available() > 0) {
        char incomingbyte = Wire.read();
        if (incomingbyte == startChar) {
          dataBufferIndex = 0;  //Initialize our dataBufferIndex variable
          storeString = true;
        }
        if (storeString) {
          //Let's check our index here, and abort if we're outside our buffer size
          //We use our define here so our buffer size can be easily modified
          if (dataBufferIndex == DATABUFFERSIZE) {
            //Oops, our index is pointing to an array element outside our buffer.
            dataBufferIndex = 0;
            break;
          }
          if (incomingbyte == endChar) {
            dataBuffer[dataBufferIndex] = 0; //null terminate the C string
            //Our data string is complete.  return true
            return true;
          }
          else {
            dataBuffer[dataBufferIndex++] = incomingbyte;
            dataBuffer[dataBufferIndex] = 0; //null terminate the C string
          }
        }
        else {
        }
      }

      //We've read in all the available Serial data, and don't have a valid string yet, so return false
      return false;
    }
  }
  boolean storeString = false; //This will be our flag to put the data in our buffer
  while (Wire.available() > 0) {
    char incomingbyte = Wire.read();
    if (incomingbyte == startChar) {
      dataBufferIndex = 0;  //Initialize our dataBufferIndex variable
      storeString = true;
    }
    if (storeString) {
      //Let's check our index here, and abort if we're outside our buffer size
      //We use our define here so our buffer size can be easily modified
      if (dataBufferIndex == DATABUFFERSIZE) {
        //Oops, our index is pointing to an array element outside our buffer.
        dataBufferIndex = 0;
        break;
      }
      if (incomingbyte == endChar) {
        //Our data string is complete.  Parse it here
        storeString = false;
      }
      else {
        dataBuffer[dataBufferIndex++] = incomingbyte;
        dataBuffer[dataBufferIndex] = 0; //null terminate the C string
      }
    }
  }
  Serial.print(c);

}

Serial.println(" ");
delay(500);