ADC_STEPS
start_step = ADC_STEPS - sc->sc_coord_readouts + 1;
start_step = ADC_STEPS - (sc->sc_coord_readouts*2 + 2) + 1;
start_step = ADC_STEPS - (sc->sc_coord_readouts + 2) + 1;
start_step = ADC_STEPS - (sc->sc_coord_readouts*2 + 2) + 1;
end_step = ADC_STEPS;