green.c

#include <mega32.h>
#include <delay.h>
#include <stdlib.h>
#include <alcd.h>
#define push1 PINA.1
#define push2 PINA.2
#define push3 PINA.3
#define push4 PINA.4


float adc_data;
char up[5], low[5];
float up_limit=25, low_limit=18;

void disp_limit()
{
      delay_ms(110);  
      ftoa(low_limit,0,low);
      ftoa(up_limit,0,up);     
      lcd_gotoxy(0,1);
      lcd_puts("Limits: ");
      lcd_puts(low);
      lcd_puts(" - ");
      lcd_puts(up);                    

}
interrupt [ADC_INT] void adc_isr(void)
{

    char disp[16];
    // Read the AD conversion result
    adc_data=ADCW/4; //1.5/10.24;
    ftoa(adc_data,2,disp);
    lcd_gotoxy(0,0);
    lcd_puts("Temp: ");
    lcd_puts(disp);
    lcd_puts(" C");
    
}
void main(void)
{


ADMUX=0b11000000;
ADCSRA=(1<<ADEN) | (0<<ADSC) | (0<<ADATE) | (0<<ADIF) | (1<<ADIE) | (1<<ADPS2) | (1<<ADPS1) | (1<<ADPS0);


lcd_init(16);
lcd_clear();
#asm("sei")
DDRA =0b11000000;





while (1)
      {      
      delay_us(10);
      ADCSRA |= (1<<ADSC);
      delay_ms(10);   
            
      if(adc_data<low_limit)  
      { 
           PORTA = 0b10000000;
      }
      else if(adc_data>up_limit)  
      { 
            PORTA = 0b01000000;
               
      }
        else 
        {
            PORTA = 0b00000000;
            
        }
      
      //limit
      disp_limit();
      if(push1==0&&up_limit>low_limit) {
        low_limit+=1;
        disp_limit();
        }
      if(push2==0) {
       low_limit-=1;
       disp_limit();
        }
      if(push3==0&&up_limit>low_limit) {
        up_limit-=1;
        disp_limit();
        }
      if(push4==0) {
       up_limit+=1;
       disp_limit();
        }
                    
      }
}