/*-----------------------------------------------------------------------------
ROUTINE Name : ADC_Get_8bits

Description:	Return 8 bits resolution ADC value only, averaged over 8 samples.
Input/Output:	u8/u8 (channel number/result of conversion)
Comments: 		None
-----------------------------------------------------------------------------*/
u8 ADC_Get_8bits(u8 Channel)
{
  u16 result=0;
  u8 i;

  ADMUX = Channel;                   //Set AD-Channel
  ClrBit(ADMUX,REFS1);               //VCC is Referencevoltage
  ClrBit(ADMUX,REFS0);
  SetBit(ADMUX,ADLAR);               //adjust ad-result to the left

  SetBit(ADCSR,ADEN);                //Enable ADC
  ClrBit(ADCSR,ADPS2);               //Select Prescaler
  SetBit(ADCSR,ADPS1);
  SetBit(ADCSR,ADPS0);
  ClrBit(ADCSR,ADFR);                //no freerunning
  SetBit(ADCSR,ADIF);
  SetBit(ADCSR,ADSC);                //start conversion
  while(!(ADCSR&(1<<ADIF)));         //wait till end of conversion
  ADCH;                              //ignore first result
  SetBit(ADCSR,ADIF);                //clear flag

 for (i=0;i<=7;i++)                  //take 8 Samples
  {
   SetBit(ADCSR,ADSC);               //start conversion
   while(!(ADCSR&(1<<ADIF)));        //wait till end of conversion
   result+= ADCH;                    //add result
   SetBit(ADCSR,ADIF);               //clear flag
  }
  ClrBit(ADCSR,ADEN);                //Disable ADC peripheral
  result = result >> 3;              //div/8, smooth result
  return((u8)result);
}