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//Инициализация:
ADCSR |= (( 1 << ADEN  ) | ( 1 << ADSC  ) | ( 1 << ADPS2 ) | ( 1 << ADPS1 ));
while ( ADCSR & ( 1 << ADSC ) );          /* wait for complete conversion */


uint16_t ADCIN( uint8_t channel )
{
    ADMUX  = ( 1 << ADLAR ) | ( 1 << REFS0 ) | channel;
    ADCSRA = ( 1 << ADEN  ) | ( 1 << ADSC  );
    DELAY_US( 64 );  // 64 microseconds delay
    while ( ADCSR & ( 1 << ADSC ) );
return ADCH;
}