Package edu.wpi.first.wpilibj

Class DigitalGlitchFilter

java.lang.Object
edu.wpi.first.wpilibj.DigitalGlitchFilter
All Implemented Interfaces:
Sendable, AutoCloseable
public class DigitalGlitchFilter
extends Object
implements Sendable, AutoCloseable
Class to enable glitch filtering on a set of digital inputs. This class will manage adding and removing digital inputs from a FPGA glitch filter. The filter lets the user configure the time that an input must remain high or low before it is classified as high or low.

  • Constructor Summary

    Constructors 
    Constructor Description
    DigitalGlitchFilter()
    Configures the Digital Glitch Filter to its default settings.

  • Method Summary

    Modifier and Type Method Description
    void add​(Counter input)
    Assigns the Counter to this glitch filter.
    void add​(DigitalSource input)
    Assigns the DigitalSource to this glitch filter.
    void add​(Encoder input)
    Assigns the Encoder to this glitch filter.
    void close()  
    int getPeriodCycles()
    Gets the number of FPGA cycles that the input must hold steady to pass through this glitch filter.
    long getPeriodNanoSeconds()
    Gets the number of nanoseconds that the input must hold steady to pass through this glitch filter.
    void initSendable​(SendableBuilder builder)
    Initializes this Sendable object.
    void remove​(Counter input)
    Removes this filter from the given Counter.
    void remove​(DigitalSource input)
    Removes this filter from the given digital input.
    void remove​(Encoder input)
    Removes this filter from the given Encoder.
    void setPeriodCycles​(int fpgaCycles)
    Sets the number of FPGA cycles that the input must hold steady to pass through this glitch filter.
    void setPeriodNanoSeconds​(long nanoseconds)
    Sets the number of nanoseconds that the input must hold steady to pass through this glitch filter.

    Methods inherited from class java.lang.Object

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

  • Constructor Details

  • Method Details

    • close

      public void close()
      Specified by:
      close in interface AutoCloseable

    • add

      public void add​(DigitalSource input)
      Assigns the DigitalSource to this glitch filter.
      Parameters:
      input - The DigitalSource to add.

    • add

      public void add​(Encoder input)
      Assigns the Encoder to this glitch filter.
      Parameters:
      input - The Encoder to add.

    • add

      public void add​(Counter input)
      Assigns the Counter to this glitch filter.
      Parameters:
      input - The Counter to add.

    • remove

      public void remove​(DigitalSource input)
      Removes this filter from the given digital input.
      Parameters:
      input - The DigitalSource to stop filtering.

    • remove

      public void remove​(Encoder input)
      Removes this filter from the given Encoder.
      Parameters:
      input - the Encoder to stop filtering.

    • remove

      public void remove​(Counter input)
      Removes this filter from the given Counter.
      Parameters:
      input - The Counter to stop filtering.

    • setPeriodCycles

      public void setPeriodCycles​(int fpgaCycles)
      Sets the number of FPGA cycles that the input must hold steady to pass through this glitch filter.
      Parameters:
      fpgaCycles - The number of FPGA cycles.

    • setPeriodNanoSeconds

      public void setPeriodNanoSeconds​(long nanoseconds)
      Sets the number of nanoseconds that the input must hold steady to pass through this glitch filter.
      Parameters:
      nanoseconds - The number of nanoseconds.

    • getPeriodCycles

      public int getPeriodCycles()
      Gets the number of FPGA cycles that the input must hold steady to pass through this glitch filter.
      Returns:
      The number of cycles.

    • getPeriodNanoSeconds

      public long getPeriodNanoSeconds()
      Gets the number of nanoseconds that the input must hold steady to pass through this glitch filter.
      Returns:
      The number of nanoseconds.

    • initSendable

      public void initSendable​(SendableBuilder builder)
      Description copied from interface: Sendable
      Initializes this Sendable object.
      Specified by:
      initSendable in interface Sendable
      Parameters:
      builder - sendable builder