Package edu.wpi.first.hal

Class DigitalGlitchFilterJNI

java.lang.Object

edu.wpi.first.hal.JNIWrapper

edu.wpi.first.hal.DigitalGlitchFilterJNI

public class DigitalGlitchFilterJNI
extends JNIWrapper

Digital Glitch Filter JNI functions.

See Also:

• "hal/DIO.h"

Nested Class Summary

Nested classes/interfaces inherited from class edu.wpi.first.hal.JNIWrapper

JNIWrapper.Helper

Method Summary

Modifier and Type	Method	Description
static int	getFilterPeriod(int filterIndex)	Gets the filter period for the specified filter index.
static int	getFilterSelect(int digitalPortHandle)	Reads the filter index from the FPGA.
static void	setFilterPeriod(int filterIndex, int fpgaCycles)	Sets the filter period for the specified filter index.
static void	setFilterSelect(int digitalPortHandle, int filterIndex)	Writes the filter index from the FPGA.

Methods inherited from class edu.wpi.first.hal.JNIWrapper

forceLoad, suppressUnused

Methods inherited from class java.lang.Object

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

Method Details

setFilterSelect

public static void setFilterSelect(int digitalPortHandle,
 int filterIndex)

Writes the filter index from the FPGA.

Set the filter index used to filter out short pulses.

Parameters:

digitalPortHandle - the digital port handle

filterIndex - the filter index (Must be in the range 0 - 3, where 0 means "none" and 1 - 3 means filter # filterIndex - 1)

See Also:

• "HAL_SetFilterSelect"

getFilterSelect

public static int getFilterSelect(int digitalPortHandle)

Reads the filter index from the FPGA.

Gets the filter index used to filter out short pulses.

Parameters:

digitalPortHandle - the digital port handle

Returns:

the filter index (Must be in the range 0 - 3, where 0 means "none" and 1 - 3 means filter # filterIndex - 1)

See Also:

• "HAL_GetFilterSelect"

setFilterPeriod

public static void setFilterPeriod(int filterIndex,
 int fpgaCycles)

Sets the filter period for the specified filter index.

Sets the filter period in FPGA cycles. Even though there are 2 different filter index domains (MXP vs HDR), ignore that distinction for now since it complicates the interface. That can be changed later.

Parameters:

filterIndex - the filter index, 0 - 2

fpgaCycles - the number of cycles that the signal must not transition to be counted as a transition.

See Also:

• "HAL_SetFilterPeriod"

getFilterPeriod

public static int getFilterPeriod(int filterIndex)

Gets the filter period for the specified filter index.

Gets the filter period in FPGA cycles. Even though there are 2 different filter index domains (MXP vs HDR), ignore that distinction for now since it complicates the interface.

Parameters:

filterIndex - the filter index, 0 - 2

Returns:

The number of FPGA cycles of the filter period.

See Also:

• "HAL_GetFilterPeriod"