int aref = AREF_GROUND; /* more on this later */
const char filename[] = "/dev/comedi0";
-/* initialize a comedi_polynomial_t so it can be used with comedi_to_physical */
+/* figure out if we are talking to a hardware-calibrated or software-calibrated board,
+ then obtain a comedi_polynomial_t which can be used with comedi_to_physical */
int get_converter(comedi_t *device, unsigned subdevice, unsigned channel,
unsigned range, comedi_polynomial_t *converter)
{