#include <pic.h>
#include "biosdem.h"
__CONFIG(0X3539);
#define CHAUFFAGE RB3

void main(void)
	{
		int  cons=20 , hyst = 4, delta = 1;
		int temp;
	    static	bit b=0 ;
	    char unit = 'C' ;
		TRISB = 0xF1 ;
		PORTB = 0 ;	
		adc_on();
		DelayMs(100);
		lcd_init();
		lcd_clear();
	    if ( !RA4 )
	       {
	         unit = 'F' ;
	         cons = 68 ;
	         hyst = 7 ;
	         delta = 2 ;
	         lcd_printf("Using Fahrenheit");
	       
	         lcd_goto(LCD_LINE_TWO);
	         lcd_printf("  Depress S2 ! ");    
	         while ( !RA4 )
	            ;
	         lcd_clear();         
	       } 
		for ( ; ; )
			{
			 temp = -128 + (int) adc_read_8b(0);
			 if ( unit == 'F')
			   {
			       temp = (9.0 * temp)/5.0 + 32 ; 
			     }
			 if ( !RA4 && RB0 )
			 	{
			 	   if (cons < 100 && !b)
			 	      {
			 	       cons -= delta ;
			 	       b=1 ;
			 	      }
			 	}
			    else
			    {
			      if (!RB0 && RA4)
			          {
			            if ( cons > -10 && !b)
			            	{
			            	  cons += delta ;
			            	  b=1;
			            	}
			          }
			       else
			        {
			          if (!RB0 && !RA4 && !b)
			             {
			                cons = (unit=='C') ? 20:68  ;
			             }
			          else
			             {
			               b=0;
			             }
			        }
			    }
		     lcd_goto(LCD_LINE_TWO+0);
			 lcd_printf("Cons : %4d %c ",cons,unit);
			 lcd_goto(LCD_LINE_ONE+0);
	   		 lcd_printf("Temp : %4d %c ",temp,unit);
		
		 if ( temp > cons + hyst )
			   {
			      CHAUFFAGE = 0 ;
			      lcd_goto(LCD_LINE_ONE+15);
			      lcd_putchar('+');
			   }
			 else
			   {
			     if (temp < cons - hyst )
			       {
			          CHAUFFAGE = 1 ;
			          lcd_goto(LCD_LINE_ONE+15);
			          lcd_putchar('-');
			       }
			   else
			    {
			       lcd_goto(LCD_LINE_ONE+15);
			       lcd_putchar('o');   
			    }
			   }
			
			
		
	     }
	}