Attiny softserial and gps

Attiny_gps_beacon.ino

/*

Original code come from Adafruit GPS logger shield kit - v1.1
http://www.adafruit.com/products/98
http://www.ladyada.net/make/gpsshield/download.html
All of this example Arduino code is Public Domain. Enjoy!
http://en.wikipedia.org/wiki/GNU_General_Public_License

Modified by DWHacks for use with U-blox PCI-5S.
Info about U-blox PCI-5S here: http://emerythacks.blogspot.ca/2013/01/u-blox-pci-5s-cheap-gps-module-for-your.html
Info about DWHacks: daynewaterlow.com

Settings for U-blox device:
RATES
Measurment period: 500ms (2 Hz)
PRT
Target: 1 UART1
Protocol in: 1 - NMEA
Protocol out: 1 - NMEA
Baudrate: 9600
Remove un neccessary data 

*/

#include <SoftwareSerial.h>
#include <Morse.h>

SoftwareSerial gpsSerial(0, 1); //RX TX connections on attiny85

Morse morse(4, 20, 1); //set up the Morse Pin, Speed, type

// Set the pins used 
#define led1Pin 2 //Get data from GPS

#define BUFFSIZE 90 //90
char buffer[BUFFSIZE];
uint8_t bufferidx = 0;
bool fix = false; // current fix data
bool gotGPRMC;    //true if current data is a GPRMC strinng
uint8_t i;

// read a Hex value and return the decimal equivalent
uint8_t parseHex(char c) {
  if (c < '0')
    return 0;
  if (c <= '9')
    return c - '0';
  if (c < 'A')
    return 0;
  if (c <= 'F')
    return (c - 'A')+10;
}


void setup() {
 // Serial.begin(115200);
  gpsSerial.begin(9600);
  //gpsSerial.print("$PSRF103,04,00,00,01*25\r\n"); // 
  //gpsSerial.print("$PMTK251,9600*27\r\n"); //force 9600bps
  //gpsSerial.print("$PMTK314,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0*2C\r\n");
  
  
   
  //Serial.println("\r\nStarting...");
  pinMode(led1Pin, OUTPUT);
  //pinMode(pin16, OUTPUT);
}

void loop() {
  
  //digitalWrite(powerLed, HIGH); //indicate teensy is getting power
  //Serial.println(Serial.available(), DEC);
  char c;
  uint8_t sum;

  // read one 'line'
  if (gpsSerial.available()) {
    c = gpsSerial.read();

    if (bufferidx == 0) {
      while (c != '$')
        c = gpsSerial.read(); // wait till we get a $
    }
    buffer[bufferidx] = c;

    if (c == '\n') {

      buffer[bufferidx+1] = 0; // terminate it

      if (buffer[bufferidx-4] != '*') {
        // no checksum?
        //Serial.print('*');
        bufferidx = 0;
        return;
      }
      // get checksum
      sum = parseHex(buffer[bufferidx-3]) * 16;
      sum += parseHex(buffer[bufferidx-2]);

      // check checksum
      for (i=1; i < (bufferidx-4); i++) {
        sum ^= buffer[i];
      }
      if (sum != 0) {
        //putstring_nl("Cxsum mismatch");
        //Serial.print('~');
        bufferidx = 0;
        return;
      }
      // got good data!

      gotGPRMC = strstr(buffer, "GPRMC"); //GPRMC
      if (gotGPRMC)
      {
        // find out if we got a fix
        char *p = buffer;
        p = strchr(p, ',')+1;
        p = strchr(p, ',')+1;       // skip to 3rd item
        
        if (p[0] == 'V') {
          digitalWrite(led1Pin, LOW);
          fix = false;
        } else {
          digitalWrite(led1Pin, HIGH);  //Turn on LED1 when we have a fix
          fix = true;
        }
      }      
      if (!fix) {
          //Serial.print('_');
          morse.sendmsg("NO FIX");
          delay(50);
          bufferidx = 0;
          return;
        }
      // rad. lets log it!
      
      //Serial.print(buffer);    //first, write it to the serial monitor
      //Serial.print('#');
      
      if (gotGPRMC)      //If we have a GPRMC string
      {
        
        // Bill Greiman - need to write bufferidx + 1 bytes to getCR/LF 
        bufferidx++;
        delay(1000); //Origonal 10000
        

        //put transmit code here
        morse.sendmsg(buffer);
        
        bufferidx = 0;    //reset buffer pointer
        
        return;

     
      }//if (gotGPRMC)
      
    }
    bufferidx++;
    if (bufferidx == BUFFSIZE-1) {
       //Serial.print('!');
       bufferidx = 0;
    }
  } else {

  }
  
}
/* End code */