comedi_data_read_delayed — read single sample from channel after delaying for specified settling time
#include <comedilib.h>
int comedi_data_read_delayed( | comedi_t * device, |
| unsigned int subdevice, | |
| unsigned int channel, | |
| unsigned int range, | |
| unsigned int aref, | |
| lsampl_t * data, | |
unsigned int nanosec); |
Similar to
comedi_data_read
except it will wait for the
specified number of nanoseconds between setting the input
channel and taking a sample. For analog inputs, most
boards have a single
analog to digital converter which is multiplexed to be
able to read multiple channels. If the input is not allowed
to settle after the multiplexer switches channels, the
reading will be inaccurate. This function is useful
for allowing a multiplexed analog input to settle
when switching channels.
Although the settling time is specified in nanoseconds, the actual settling time will be rounded up to the nearest microsecond.