//#define HS_Osc //The board has the High Speed = 20MHz Crystal Oscillator
//#include "16F876a.h" // device dependent interrupt definitions
//#pragma config|= 0x3F32 //HS Ocs

//the following line is to not overwrite the PIC boot loader part in the program memory

#pragma origin 4

#define RELAY PORTA.1
#define OFF 0
#define ON 1

//RX routine for receiving data over the Serial Port
unsigned char ReadByte(void) {
   // wait to receive character
   while(!RCIF);
   // return received character
   return RCREG;
}


void main(void) {

   unsigned char command;

   INTCON = 0x0;// Disable inerupt

   CMCON = 0x07;// Comparators Off
   ADCON1 = 0x06;// Port as Digital IO
   TRISA = 0b.0000.0000;//0 = Output, 1 = Input
   TRISB = 0b.1110.1111;// All as input, except LED pin
   TRISC = 0b.1000.0000;//RC7 is RX which is input and RC6 is TX which is output

   // RX Setting, 8bit, enable receive,
  RCSTA = 0x90;
   // TX Setting, 8bit, Asynchronous mode, High speed
   TXSTA = 0x24;
   // Set Baudrade - 9600 (from datasheet baudrade table)
   SPBRG = 129;

   while(1) {
     command = ReadByte();//receive a character
     if(command == 27) { //if the character is TV ON, 0x27
       RELAY = ON; //Turning ON the pin that is connected to the relay
     }  
     else if (command == 28) {
       RELAY = OFF;
     }
   }
}