frc::DutyCycle Class Reference

Class to read a duty cycle PWM input. More...

#include <frc/DutyCycle.h>

Inheritance diagram for frc::DutyCycle:

Public Member Functions
	DutyCycle (DigitalSource &source)
	Constructs a DutyCycle input from a DigitalSource input.
	DutyCycle (DigitalSource *source)
	Constructs a DutyCycle input from a DigitalSource input.
	DutyCycle (std::shared_ptr< DigitalSource > source)
	Constructs a DutyCycle input from a DigitalSource input.
	DutyCycle (DutyCycle &&)=default
DutyCycle &	operator= (DutyCycle &&)=default
	~DutyCycle () override=default
	Close the DutyCycle and free all resources.
int	GetFrequency () const
	Get the frequency of the duty cycle signal.
double	GetOutput () const
	Get the output ratio of the duty cycle signal.
units::second_t	GetHighTime () const
	Get the raw high time of the duty cycle signal.
unsigned int	GetOutputScaleFactor () const
	Get the scale factor of the output.
int	GetFPGAIndex () const
	Get the FPGA index for the DutyCycle.
int	GetSourceChannel () const
	Get the channel of the source.
Public Member Functions inherited from wpi::Sendable
virtual constexpr	~Sendable ()=default
Public Member Functions inherited from wpi::SendableHelper< DutyCycle >
constexpr	SendableHelper (const SendableHelper &rhs)=default
constexpr	SendableHelper (SendableHelper &&rhs)
constexpr SendableHelper &	operator= (const SendableHelper &rhs)=default
constexpr SendableHelper &	operator= (SendableHelper &&rhs)

Protected Member Functions
void	InitSendable (wpi::SendableBuilder &builder) override
	Initializes this Sendable object.
Protected Member Functions inherited from wpi::SendableHelper< DutyCycle >
constexpr	SendableHelper ()=default
constexpr	~SendableHelper ()

Friends
class	AnalogTrigger
class	DMA
class	DMASample

Detailed Description

Class to read a duty cycle PWM input.

PWM input signals are specified with a frequency and a ratio of high to low in that frequency. There are 8 of these in the roboRIO, and they can be attached to any DigitalSource.

These can be combined as the input of an AnalogTrigger to a Counter in order to implement rollover checking.

Constructor & Destructor Documentation

DutyCycle() [1/4]

frc::DutyCycle::DutyCycle ( DigitalSource & source )

explicit

Constructs a DutyCycle input from a DigitalSource input.

This class does not own the inputted source.

Parameters

source

The DigitalSource to use.

DutyCycle() [2/4]

frc::DutyCycle::DutyCycle ( DigitalSource * source )

explicit

Constructs a DutyCycle input from a DigitalSource input.

This class does not own the inputted source.

Parameters

source

The DigitalSource to use.

DutyCycle() [3/4]

frc::DutyCycle::DutyCycle ( std::shared_ptr< DigitalSource > source )

explicit

Constructs a DutyCycle input from a DigitalSource input.

This class does not own the inputted source.

Parameters

source

The DigitalSource to use.

DutyCycle() [4/4]

frc::DutyCycle::DutyCycle ( DutyCycle && )

default

~DutyCycle()

frc::DutyCycle::~DutyCycle ( )

overridedefault

Close the DutyCycle and free all resources.

Member Function Documentation

GetFPGAIndex()

int frc::DutyCycle::GetFPGAIndex

(

)

const

Get the FPGA index for the DutyCycle.

Returns

the FPGA index

GetFrequency()

int frc::DutyCycle::GetFrequency

(

)

const

Get the frequency of the duty cycle signal.

Returns

frequency in Hertz

GetHighTime()

units::second_t frc::DutyCycle::GetHighTime

(

)

const

Get the raw high time of the duty cycle signal.

Returns

high time of last pulse

GetOutput()

double frc::DutyCycle::GetOutput

(

)

const

Get the output ratio of the duty cycle signal.

0 means always low, 1 means always high.

Returns

output ratio between 0 and 1

GetOutputScaleFactor()

unsigned int frc::DutyCycle::GetOutputScaleFactor

(

)

const

Get the scale factor of the output.

An output equal to this value is always high, and then linearly scales down to 0. Divide a raw result by this in order to get the percentage between 0 and 1. Used by DMA.

Returns

the output scale factor

GetSourceChannel()

int frc::DutyCycle::GetSourceChannel

(

)

const

Get the channel of the source.

Returns

the source channel

InitSendable()

void frc::DutyCycle::InitSendable ( wpi::SendableBuilder & builder )

overrideprotectedvirtual

Initializes this Sendable object.

Parameters

builder

sendable builder

Implements wpi::Sendable.

operator=()

DutyCycle & frc::DutyCycle::operator= ( DutyCycle && )

default

Friends And Related Symbol Documentation

AnalogTrigger

friend class AnalogTrigger

friend

DMA

friend class DMA

friend

DMASample

friend class DMASample

friend

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The documentation for this class was generated from the following file:

• frc/DutyCycle.h