org.lsst.ccs.drivers.dataforth

Class Maq20DiscretePulse

java.lang.Object

org.lsst.ccs.drivers.dataforth.Maq20Discrete

org.lsst.ccs.drivers.dataforth.Maq20DiscreteFunc

org.lsst.ccs.drivers.dataforth.Maq20DiscretePulse

public class Maq20DiscretePulse
extends Maq20DiscreteFunc

Control a Dataforth MAQ20 discrete I/O module pulse counter.

Author:

Owen Saxton

Field Summary

Fields inherited from class org.lsst.ccs.drivers.dataforth.Maq20DiscreteFunc

TIMEBASE_MSECS, TIMEBASE_SECS, TIMEBASE_USECS

Method Summary

Modifier and Type	Method and Description
void	enable(int chan) Enables the pulse counter.
int	getPulsesPerRevn(int chan) Gets the pulses per revolution.
boolean	isEnabled(int chan) Gets whether the pulse counter is enabled.
int	readFrequency(int chan) Reads the frequency.
int	readPulseCount(int chan) Reads the pulse count
int	readRPM(int chan) Reads the RPM.
void	resetPulseCount(int chan) Resets the pulse count
void	setPulsesPerRevn(int chan, int count) Sets the pulses per revolution.

Methods inherited from class org.lsst.ccs.drivers.dataforth.Maq20DiscreteFunc

armFunction, disarmFunction, isFunctionArmed, saveConfig

Methods inherited from class org.lsst.ccs.drivers.dataforth.Maq20Discrete

getDiscDefault, getDiscDefault, getDiscDefault, readDiscIn, readDiscIn, readDiscIn, readDiscOut, readDiscOut, readDiscOut, saveDiscDefaults, setDiscDefault, setDiscDefault, setDiscDefault, writeDisc, writeDisc, writeDisc

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

enable

public void enable(int chan)
            throws org.lsst.ccs.drivers.commons.DriverException

Enables the pulse counter.

Parameters:

chan - The function channel (0 or 1)

Throws:

org.lsst.ccs.drivers.commons.DriverException

isEnabled

public boolean isEnabled(int chan)
                  throws org.lsst.ccs.drivers.commons.DriverException

Gets whether the pulse counter is enabled.

Parameters:

chan - The function channel (0 or 1)

Returns:

Whether anabled

Throws:

org.lsst.ccs.drivers.commons.DriverException

readPulseCount

public int readPulseCount(int chan)
                   throws org.lsst.ccs.drivers.commons.DriverException

Reads the pulse count

Parameters:

chan - The function channel (0 or 1)

Returns:

The pulse count

Throws:

org.lsst.ccs.drivers.commons.DriverException

resetPulseCount

public void resetPulseCount(int chan)
                     throws org.lsst.ccs.drivers.commons.DriverException

Resets the pulse count

Parameters:

chan - The function channel (0 or 1)

Throws:

org.lsst.ccs.drivers.commons.DriverException

readFrequency

public int readFrequency(int chan)
                  throws org.lsst.ccs.drivers.commons.DriverException

Reads the frequency.

Parameters:

chan - The function channel (0 or 1)

Returns:

The pulse count

Throws:

org.lsst.ccs.drivers.commons.DriverException

readRPM

public int readRPM(int chan)
            throws org.lsst.ccs.drivers.commons.DriverException

Reads the RPM. The module's calculation of the RPM loses precision in early versions of the firmware, so in this case the value is calculated from the frequency measurement.

Parameters:

chan - The function channel (0 or 1)

Returns:

The pulse count

Throws:

org.lsst.ccs.drivers.commons.DriverException

setPulsesPerRevn

public void setPulsesPerRevn(int chan,
                             int count)
                      throws org.lsst.ccs.drivers.commons.DriverException

Sets the pulses per revolution.

Parameters:

chan - The function channel (0 or 1)

count - The number of pulses per revolution

Throws:

org.lsst.ccs.drivers.commons.DriverException

getPulsesPerRevn

public int getPulsesPerRevn(int chan)
                     throws org.lsst.ccs.drivers.commons.DriverException

Gets the pulses per revolution.

Parameters:

chan - The function channel (0 or 1)

Returns:

The number of pulses per revolution

Throws:

org.lsst.ccs.drivers.commons.DriverException