File content as of revision 1:ab3c75cf5906:

/*******************************************
 * ReceivePacket.h
 * @author Yuki Suga
 * @copyright Yuki Suga (ysuga.net) Nov, 10th, 2010.
 * @license LGPLv3
 *****************************************/
/********************************************
It changed a little for mbed. 
The serial buffer is not used. 
2011/7/27 @nucho
********************************************/
#include "ReceivePacket.h"
#include "Serial.h"
//#include <HardwareSerial.h>
//#include <WConstants.h>

int ReceivePacket(char* packet) {
    //int counter = 0;
    unsigned char sum = 0;
    /*
    while (Serial.available() < PACKET_HEADER_SIZE) {
        delayMicroseconds(PACKET_WAITING_DELAY);
        counter++;
        if (counter == PACKET_WAITING_COUNT) {
            return -TIMEOUT;
        }
    }*/
    //    char host = Serial.read();
    //    char target = Serial.read();

    packet[INTERFACE] = pc.getc();
    sum += packet[INTERFACE];

    packet[DATA_LENGTH] = pc.getc();
    sum += packet[DATA_LENGTH];

    /*
    while (Serial.available() < packet[DATA_LENGTH]+1) {
        //delayMicroseconds(PACKET_WAITING_DELAY);
        wait_us(PACKET_WAITING_DELAY);
        counter++;
        if (counter == PACKET_WAITING_COUNT) {
            return -DATA_TIMEOUT;
        }
    }*/

    for (int i = 0; i < packet[DATA_LENGTH]; i++) {
        packet[PACKET_HEADER_SIZE+i] = pc.getc();
        sum += packet[PACKET_HEADER_SIZE+i];
    }
    packet[PACKET_HEADER_SIZE+packet[DATA_LENGTH]] = pc.getc();
    if (sum != packet[PACKET_HEADER_SIZE+packet[DATA_LENGTH]]) {
        return -CHECKSUM_ERROR;
    }
    return PACKET_HEADER_SIZE + packet[DATA_LENGTH] + 1;
}

/*
int read_string(char* buffer, int flag=1) {
  int counter = 0;
  for(int i = 0;i < 100;i++) {
    if(Serial.available() > 0) {
      buffer[counter] = Serial.read();
      if(buffer[counter] == '^') {
    buffer[counter] = 0;
    Serial.print("AO^");
    return counter+1;
      }
      counter++;
    }
    delayMicroseconds(100);
  }
  if(flag)
  Serial.print("AE^");
  return -1;
}

*/