//Receive Unit

//Includes
#include<mega32.h>
#include<delay.h>
#include<.\txrx.c>
#include <stdio.h>
#asm
    .equ __lcd_port=0x15
#endasm
#include <lcd4x40.h>

//definitions
#define begin {
#define end }
#define MAX_RX_LENGTH 32
#define data_buffer 32
#define threshold 2000
//declarations

char my_rx_data[MAX_RX_LENGTH];
unsigned int time;
char done, length, i, j, k, current_line, last_replaced;
char lcd_buffer[41];    // LCD display buffer
char seen_ids[4];

//**********************************************************
//timer 0 compare ISR
interrupt [TIM0_COMP] void timer0_compare(void)
begin      
	if(time<=threshold) time++; 
end  

//**********************************************************
//initialization
void init()
begin
        //Used for LED array, output
	DDRB = 0xff;
	PORTB = 0xff; //starting off

	//PORTD used for TX.
	//d7 led, d1 TX, d0,d2..6 unused
	DDRD = 0xff;
	PORTD.7=0; //turn d7 led on as power-on led
                          
  	//set up timer 0  
  	TIMSK=2;		//turn on timer 0 cmp match ISR 
  	OCR0 = 250;  	//set the compare re to 250 time ticks
  	//prescalar to 64 and turn on clear-on-match
  	TCCR0=0b00001011;

	//LCD Setup, PORTC
        lcd_init();
        lcd_clear();
        lcd_gotoxy(0,0); 
        lcd_putsf("         WIRELESS UART RECEIVER         ");
        lcd_gotoxy(0,1); 
        lcd_putsf("         by Meghan Desai, 2005          ");
        lcd_gotoxy(0,3); 
        lcd_putsf("              ...LOADING...             ");        
        delay_ms(1500);
        lcd_clear();
        lcd_gotoxy(0,0); 
        lcd_putsf("ID  LTH NUM PAYLOAD.....................");

        //TXRX init
 	txrx_init(0,1,249,1);//RX only - 4000 baud - led on
        rx_reset(MAX_RX_LENGTH);
        
	//initialize variables
	seen_ids[0] = 0;
	seen_ids[1] = 0;
	seen_ids[2] = 0;
	seen_ids[3] = 0;
	time=0;
	done=0;
	current_line=1;
        last_replaced=1;
        #asm ("sei");  
end                                                         



//**********************************************************
void main()
{

init();

while(1)
{ 
	if(rxdone()==1)
	{
	
                k=0;
                init_getrx();
                while(rx_empty()!=1)
                {       my_rx_data[k] = get_next_rx_data();
                        k++;
                }
                // 0 - 170
                // 1 - start_char
                // 2 - ID
                // 3 - length
                // 4 - number
                // 5 to x - payload
                rx_reset(MAX_RX_LENGTH);                                   
                
                if(current_line>3))
                begin
                        current_line=1;
                end
                  
                 //ID
       	        sprintf(lcd_buffer,"%-i",decodeOne(my_rx_data[2])); 
                lcd_gotoxy(0,current_line); 
                lcd_putsf("                                        ");
                lcd_gotoxy(0,current_line); 
      	        lcd_puts(lcd_buffer); 
      	
              	//length
      	        sprintf(lcd_buffer,"%-i",my_rx_data[3]); 
                lcd_gotoxy(4,current_line); 
      	        lcd_puts(lcd_buffer); 
      	
              	//number
              	sprintf(lcd_buffer,"%-i",my_rx_data[4]); 
                lcd_gotoxy(8,current_line); 
              	lcd_puts(lcd_buffer); 
       
                //payload
                i=0; j=12;
                while(i<my_rx_data[3])
                {
                      	sprintf(lcd_buffer,"%-i",my_rx_data[(char)(i+5)]); 
                        lcd_gotoxy(j,current_line); 
              	        lcd_puts(lcd_buffer); 
              	        i++; j=j+4; 
              	        if(j >= 40) i = my_rx_data[3];
                }
		current_line++;
	}
       	if(time==threshold)
	{
		time=0;
		PORTD.7 = 1;
	}
} //while
} //main