#include <avr/io.h>
#include <lcd.h>
#include <lcd.c>
#include <stdint.h>
#include <stdlib.h>
#include <avr/delay.h>
#include <avr/interrupt.h>
//#define F_CPU 10000000

 
  double result;
  double volt;
  char Ausgabe[1];
unsigned int i = 0;
unsigned char t_high = 0;
unsigned char t_low = 0;
unsigned int timer=0;		
unsigned int rpm=0;
unsigned int zwischen_erg;
unsigned char g_temp[40];
unsigned char sreg;
  
int main(void)
{
  DDRD = 0x00;
  DDRC = 0xF8;
  DDRB = 0xFF;
  DDRA = 0x00;
  PORTA = 0x00;
  
  
  lcd_init(LCD_DISP_ON);
  SREG |= (1<<7);						//Global Interrupt Enable
  
  TCCR1B = (1<<ICNC1) | (1<<ICES1) | (1<<CS11) | (1<<CS10); //Input Capture Edge = steigende 								Flanke, Timer Prescaler = 64
 
  ADCSRA = (1<<ADEN) | (1<<ADPS2) | (1<<ADPS1);// | (1<<ADPS0);
  ADMUX |= (1<<MUX0);					//ADC1 auswählen
  ADCSRA |= (1<<ADSC);              	//eine ADC-Wandlung sarten
  
 while(!(ADCSRA & (1<<ADIF)));
   volt = 0;
   result = 0;
  
   while(0)
   {
    lcd_home();
	volt = 0;
	result = 0;
    ADCSRA |= (1<<ADSC);            	// eine Wandlung "single conversion"
    while(!(ADCSRA & (1<<ADIF)));   	// auf Abschluss der Konvertierung warten (ADIF-bit)
    result = ADC;    					// Wandlungsergebnisse aufaddieren
    ADCSRA |= (1<<ADIF);
    
   
    volt = result*0.0147;   			//Faktor: Vref/1023
    dtostrf(volt, 5, 2, Ausgabe);  	//rechnet Volt als String(Ausgabe)
    lcd_puts(Ausgabe);
	lcd_gotoxy(6, 0);
	lcd_puts("Volt");
	_delay_ms(160);
  }
	while(1){
	i++;
		if(i>200){
		
		lcd_clrscr();
		i = 0;
		
		
		if(TOV1==1){
		
		sreg = SREG;
		cli();
		TCNT1H = 0;
		TCNT1L = 0;
	
		ICR1H = 0;
		ICR1L = 0;
		lcd_gotoxy(0,0);
		lcd_puts("Motor aus");
		
		TIFR |= (1<<TOV1);
		SREG = sreg;
		}
		
		if(ICF1==1){
		
		sreg = SREG;
		cli();
		t_low = ICR1L;
		t_high = ICR1H;
		TCNT1H = 0;
		TCNT1L = 0;
		
		ICR1H = 0;
		ICR1L = 0;
		
		TIFR |= (1<<ICF1);
		
		timer=t_high;
		timer=timer*256+t_low;
		zwischen_erg=78125/timer;	
		zwischen_erg=zwischen_erg*60;
			
		
		lcd_gotoxy(0,0);
				
		sprintf(g_temp," RPM %d",zwischen_erg);
		lcd_puts(g_temp);
				
		SREG =sreg;
		}
    	}
	
   }
 }