VADC_CALIB_RATIOMETRIC
adc->graph[VADC_CALIB_RATIOMETRIC].dx = VADC_RATIOMETRIC_RANGE;
adc->graph[VADC_CALIB_RATIOMETRIC].dy =
adc->graph[VADC_CALIB_RATIOMETRIC].gnd = read_nomux_rsv4;
adc->graph[VADC_CALIB_RATIOMETRIC].dy);
ch->calibration = VADC_CALIB_RATIOMETRIC;
vadc->graph[VADC_CALIB_RATIOMETRIC].dx = VADC_RATIOMETRIC_RANGE;
vadc->graph[VADC_CALIB_RATIOMETRIC].dy = read_1 - read_2;
vadc->graph[VADC_CALIB_RATIOMETRIC].gnd = read_2;
prop->calibration = VADC_CALIB_RATIOMETRIC;