#include <avr/io.h>

#include <avr/interrupt.h>
#define F_CPU 800000
#include <util/delay.h>






void disp(int i)
{
	switch (i)
	{
		case 1: PORTD = 0b10110111;break;
					//	  76543210
		case 2: PORTD = 0b11000010;break;
					//	  76543210
		case 3: PORTD = 0b10010010;break;
					//	  76543210
		case 4: PORTD = 0b10110100;break;
					//	  76543210
		case 5: PORTD = 0b10011000;break;
					//	  76543210
		case 6: PORTD = 0b10001000;break;
					//	  76543210
		case 7: PORTD = 0b10110011;break;
					//	  76543210
		case 8: PORTD = 0b10000000;break;
					//	  76543210
		case 9: PORTD = 0b10010000;break;
					//	  76543210
		case 0: PORTD = 0b10000001;break;
					//	  76543210
		default:PORTD = 0b11111110;break;
	}
}
void dispLeft(int i)
{
	PORTB = 0b00000001;
	disp(i);
	_delay_ms(2);
}
int dispRight(int i)
{
	PORTB = 0b00000010;
	disp(i);
	_delay_ms(2);
	return(i);
}


void InitADC()
{
ADMUX=(1<<REFS0);                         // For Aref=AVcc;
ADCSRA=(1<<ADEN)|(1<<ADPS2)|(1<<ADPS1); //Prescalar div factor =64 =>8MHz/64=125kHz
}
//|(1<<ADPS0)
uint16_t ReadADC(uint8_t ch)
{
   //Select ADC Channel ch must be 0-7
   ch=ch&0b00000111;
   ADMUX|=ch;

   //Start Single conversion
   ADCSRA|=(1<<ADSC);

   //Wait for conversion to complete
   while(!(ADCSRA & (1<<ADIF)));

   //Clear ADIF by writing one to it
   //Note you may be wondering why we have write one to clear it
   //This is standard way of clearing bits in io as said in datasheets.
   //The code writes '1' but it result in setting bit to '0' !!!

   ADCSRA|=(1<<ADIF);

   return(ADC);
}

void Wait()
{
   uint8_t i;
   for(i=0;i<20;i++)
      _delay_loop_2(0);
}

void switch_toggle(int swtch)
{
	switch (swtch)
		{
			case 0 : PORTB=0b00000000;
			break;
			case 1 : PORTB=0b00000100;
			break;
	
		}
}


void main()
{
	
	uint8_t power_state;
	uint16_t ldr_result = 512;
	uint16_t power_result = 512;
	//Initialize ADC
	InitADC();
	DDRD = 0b11111111;
	DDRB = 0b00000111;
	
	
	int count = 200;
	while(count)
	{
			PORTB = 0b00000001;
			PORTD = 0b10001110; //O
			_delay_ms(2);
			PORTB = 0b00000010;
			PORTD = 0b10101110; //n
			_delay_ms(1);
			count--;
	}

  
  while(1)
   {
      
	
		
           // Read Analog value from channel-0 and 3
	  ldr_result=ReadADC(0);
	  _delay_ms(500);
	  power_result=ReadADC(3);
	 
	uint16_t to_disp = ldr_result;
  uint8_t t1[4];
	  int i=3;
      while(i>=0)
	  {
		
		t1[i] = to_disp%10;
		to_disp/=10;
		i--;
	  }
	  i=0;
	  while(i<=3)
	  {
		int count = 100;
		while(count>0)
		{
		dispRight(t1[i]);
		_delay_ms(1);
		dispLeft(t1[i-1]);
		_delay_ms(1);
		count--;
      }
	  i++;
	  }
	  
 
	if(power_result>100)
		{
			power_state=1;
		}
	else
		{
			power_state=0;
		}	
	if(power_state==1)
		{
			switch_toggle(0);
		}
	else
		{

			if(ldr_result>300)
			{
		
				switch_toggle(0);
			}
   
			else
			{
				switch_toggle(1);
			}
		}
	} //while

} //main