//Transmit.c

#include <Mega32.h>
#include <stdio.h>
#include <.\txrx.c>

//I like these definitions
#define begin {
#define end   }

#define data_length 2
#define tx_id 111

#define countNum  20 // slow down sample rate

//General Program Variables
char newReady; //ISR communication flag
unsigned int count; //state variable to slow down sampling
int dA;
float Area, dArea;
//char PushState;
//char flag;

//declarations
char data[data_length];
unsigned char packet_count;


// /************************************************/
interrupt [TIM0_OVF] void sgen(void)
begin
    count--;
    if (count==0)
    begin
      count = countNum;
      //read ADC and send to PWM
      dA = ADCH;
      //start another conversion
      ADCSR.6=1;
      newReady = 1;
    end
end  

//**********************************************************
void generate_data(char pktcount)
begin                   
	data[0] = pktcount;
	data[1] = 100; 
end      
              
/************************************************/
//initialization
void init()
begin
  //PORTA is analog input
  DDRA = 0b0 ; //all analog inputs with pullup off.
  PORTA = 0b0;

  //Used for LED array, output
  DDRC = 0xff;
  PORTC=0xff; //starting off

  //PORTD used for TX.
  //d7 led, d1 TX, d0,d2..6 unused
  DDRD = 0xff;
  //PCB Board Test
  //DDRD.2=1;
  PORTD.2 = 0;

   //turn on pwm with period= 256*8 cycles  = 2048 cycles 
   // or 7812 samples/sec //fast PWM mode,
   TCNT0 = 0; 
   OCR0 = 128; 
   TCCR0 = 0b01101010;   
   //turn on timer 0 overflow ISR
   TIMSK = 0b00000001;

  //init the A to D converter
  //channel zero/ left adj /EXTERNAL Aref
  //!!!CONNECT Aref jumper!!!!
  ADMUX = 0b01100000;
  //enable ADC and set prescaler to 1/128*16MHz=125,000
  //and clear interupt enable
  //and start a conversion
  ADCSR = 0b11000111;

  txrx_init(1,0,249,1);//TX only - 4000 baud - led on

	//initialize variables
  packet_count=0;
	generate_data(packet_count); 
	//generate_data2(packet_count);
 	#asm ("sei");
end

/************************************************/
void main(void)
begin
   init();

   //set sample rate
   count = countNum;

   while(1)
   begin
        dArea = dA;
        if(dArea>0){
          //PORTD.2 = 0;
          Area = Area + dArea;
          //debounce();
          if(Area>1500){ 
            //Send signal to the tranceiver
            generate_data(packet_count);
            tx_me(data, data_length, tx_id);       	  
  	        PORTD.2 = 0; //Flicker-on LED for test
   		      Area = 0;
          }
        }
        else{
          Area = 0;
          PORTD.2=1;
        }
   end // end while

end  //end main