comedi_data_read_hint - tell driver which channel/range/aref you are
going to read from next
int comedi_data_read_hint (comedi_t * device, unsigned int subdevice,
unsigned int channel, unsigned int range, unsigned int aref);
Used to prepare an analog input for a subsequent call to
comedi_data_read(). It is not necessary to use this function, but it
can be useful for eliminating inaccuaracies caused by insufficient
settling times when switching the channel or gain on an analog input.
This function sets an analog input to the channel, range, and aref
specified but does not perform an actual analog to digital conversion.
Alternatively, one can simply use comedi_data_read_delayed(), which
sets up the input, pauses to allow settling, then performs a
28 October 2007