[PIC] Hi, I'm using the sofware UART lib.. but the problem is that if there is no characat

char i, error, byte_read;                 // Auxiliary variables

void main(){

  ADCON1=7;
  TRISB = 0x00;                           // Set PORTB as output (error signalization)
  PORTB = 0;                              // No error
  TRISC=0;
  PORTC=0;
  error = Soft_UART_Init(&PORTC, 7, 6, 9600, 0); // Initialize Soft UART at 14400 bps
  Soft_UART_Write('2');
  while(1) {                              // Endless loop
    byte_read = Soft_UART_Read(&error);   // Read byte, then test error flag still waiting in thise function

      Soft_UART_Write(byte_read);         // If error was not detected, return byte read
      if(byte_read=='0')PORTB = 0;
      if(byte_read=='1')PORTB = 1;
      if(byte_read=='2')PORTB = 2;
      PORTC=~PORTC;
    }
}