Hier mein Code

Code:
#include <mega128.h>

// LCD functions
#asm
   .equ __lcd_port=0x1B ;PORTA
#endasm
#include <lcd.h>

#define ADC_VREF_TYPE 0x20

                  
void lcd(unsigned char uclcd);
unsigned char read_adc(unsigned char adc_input);

unsigned char ucLDR;

void main(void)
{   
 
PORTF=0x00;
DDRF=0x00;

// ADC init
ADMUX=ADC_VREF_TYPE;
ADCSRA=0x87;

// LCD init
lcd_init(24);

        while (1)
              {
                ucLDR=read_adc(3);
                
                lcd(ucLDR);

        
              };
}

void lcd(unsigned char uclcd)
{
        unsigned char ucHundert,ucZehn,ucEiner;
        
        ucHundert=uclcd/100;
        ucZehn=((uclcd-(ucHundert*100))/10);       
        ucEiner=(uclcd-(ucHundert*100)-(ucZehn*10));
        
        
        ucHundert+=0x30;
        ucZehn+=0x30;
        ucEiner+=0x30;
        
        lcd_gotoxy(1,1);
        lcd_putchar(ucHundert);
        lcd_putchar(ucZehn);
        lcd_putchar(ucEiner);

}    

unsigned char read_adc(unsigned char adc_input)
{
        ADMUX=adc_input|ADC_VREF_TYPE;
        // Start the AD conversion
        ADCSRA|=0x40;
        // Wait for the AD conversion to complete
        while ((ADCSRA & 0x10)==0);
        ADCSRA|=0x10;
        return ADCH;
}
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