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Class Gpio

Gpio is the General Purpose IO interface to libmraa. Its features depend on the board type used, it can use gpiolibs (exported via a kernel module through sysfs), or memory mapped IO via a /dev/uio device or /dev/mem depending again on the board configuration.

Inheritance

System.Object

Gpio

Namespace:MraaSharp

Assembly:MraaSharp.dll

Syntax

public class Gpio : IDisposable

Constructors

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Gpio(Int32, MraaGpioDir, MraaGpioMode, Boolean)

Declaration

public Gpio(int pin, MraaGpioDir dir, MraaGpioMode mode, bool raw = false)

Parameters

Type	Name	Description
System.Int32	pin
MraaGpioDir	dir
MraaGpioMode	mode
System.Boolean	raw

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Gpio(Int32, MraaGpioDir, Boolean)

Declaration

public Gpio(int pin, MraaGpioDir dir, bool raw = false)

Parameters

Type	Name	Description
System.Int32	pin
MraaGpioDir	dir
System.Boolean	raw

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Gpio(Int32, Boolean)

Initialise gpio context.

Declaration

public Gpio(int pin, bool raw = false)

Parameters

Type	Name	Description
System.Int32	pin	Pin number read from the board, i.e IO3 is 3. if raw parameter is true, gpio pin as listed in SYSFS.
System.Boolean	raw	without any mapping to a pin if true.

Properties

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Direction

Gpio direction

Declaration

public MraaGpioDir Direction
{
    get;
    set;
}

Property Value

Type	Description
MraaGpioDir

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EdgeMode

the edge mode on the gpio

Declaration

public MraaGpioEdge EdgeMode
{
    set;
}

Property Value

Type	Description
MraaGpioEdge

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Mode

Gpio Output Mode

Declaration

public MraaGpioMode Mode
{
    set;
}

Property Value

Type	Description
MraaGpioMode

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Owner

Change ownership of the context.

Declaration

public bool Owner
{
    set;
}

Property Value

Type	Description
System.Boolean

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Get a pin number of the gpio, invalid will return -1

Declaration

public int Pin
{
    get;
}

Property Value

Type	Description
System.Int32

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PinRaw

Get a gpio number as used within sysfs, invalid will return -1

Declaration

public int PinRaw
{
    get;
}

Property Value

Type	Description
System.Int32

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UseMmaped

Enable using memory mapped io instead of sysfs

Declaration

public bool UseMmaped
{
    set;
}

Property Value

Type	Description
System.Boolean

Methods

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Dispose()

Declaration

public void Dispose()

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Read()

Read the Gpio value. This can be 0 or 1. A resonse of -1 means that there was a fatal error.

Declaration

public MraaGpioValue Read()

Returns

Type	Description
MraaGpioValue	Result of operation

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Write(MraaGpioValue)

Write to the Gpio Value.

Declaration

public void Write(MraaGpioValue value)

Parameters

Type	Name	Description
MraaGpioValue	value	value to write