gistfile1.txt

uint8_t ultrasound_filter(char pin) {
    filt = (average>>1);
    adc = ADCH;
    for (j = 0; j <= 16; j++){
        if (ADCH > average + 100)
        {
            adc = (ADCH>>1) + filt;
        }
        if (ADCH < average - 100){
            adc = (ADCH>>1) + filt;
        }
        rollAverage[j] = adc;
    }
    for (j = 0; j <= 16; j++){
        average += rollAverage[j];
    }
    average = average>>4;
    return average;
}