emcGetFocus

NAME

emcGetFocus - Retrieve focus settings

#include "emc.h"
int emcGetFocus(EM *em, int units, double *focus);

emcGetFocus() retrieves the current focus settings

*em

points to an EM control and communications structure that was returned by the emcOpen() call.

units

the units the values are should be returned as:

`UNCALIBRATED_UNITS`	Focus is measured in units
`ANGSTROM_UNITS`	Focus is measured in angstroms
`NANOMETER_UNITS`	Focus is measured in nanometers
`MICRON_UNITS`	Focus is measured in microns

*focus

points where to store the current focus value

`EMC_OK` (0)	Success
`EMC_ERROR` (-1)	Error
`EMC_UNCALIBRATED` (-100)	Instrument not calibrated for given request
`EMC_BADUNITS` (-101)	Invalid units specified for this request
`EMC_UNSUPPORTED` (-102)	Function not supported by instrument

Page 33 of 54