Meadow.Foundation.Displays.Led.SevenSegment

SevenSegment
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

A seven-segment display is a form of electronic display device used to show decimal numbers. These displays are widely used in digital clocks, electronic meters, basic calculators, and other electronic devices that display numerical information.

The SevenSegment driver is used to represent a 7-segment display controlled via GPIO.

The displays are simply a collection of single color leds in a pre-configured solutions. The segments are commonly referred to using letters, the top segment is A, and increase alphabetically as you move clockwise around the display. The center segment is G and the decimal or period is dp.

The pinouts vary from device to device, check the documentation to map the pinouts to a specific segment. The come in a wide selection of colors and may be common anode or common cathode.

Code Example

SevenSegment sevenSegment;

public override Task Initialize()
{
    Resolver.Log.Info("Initializing...");

    sevenSegment = new SevenSegment
    (
        portA: Device.CreateDigitalOutputPort(Device.Pins.D14),
        portB: Device.CreateDigitalOutputPort(Device.Pins.D15),
        portC: Device.CreateDigitalOutputPort(Device.Pins.D06),
        portD: Device.CreateDigitalOutputPort(Device.Pins.D07),
        portE: Device.CreateDigitalOutputPort(Device.Pins.D08),
        portF: Device.CreateDigitalOutputPort(Device.Pins.D13),
        portG: Device.CreateDigitalOutputPort(Device.Pins.D12),
        portDecimal: Device.CreateDigitalOutputPort(Device.Pins.D05),
        isCommonCathode: false
    );

    return base.Initialize();
}

public override Task Run()
{
    sevenSegment.SetDisplay(character: '1', showDecimal: true);

    return base.Run();
}

Sample project(s) available on GitHub

Wiring Example

To wire a Common Cathode Seven Segment Display (like the 5161AS) to your Meadow board, connect the following:

SevenSegment	Meadow Pin
portA	D14
portB	D15
PortC	D06
PortD	D07
PortE	D08
PortF	D13
PortG	D12
portDecimal	D05
Common Cathode	GND

It should look like the following diagram:

Class SevenSegment

Seven Segment Display

Assembly: SevenSegment.dll

View Source

Declaration

public class SevenSegment : IDisposable

Implements:
System.IDisposable

Properties

IsDisposed

Is the object disposed

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Declaration

public bool IsDisposed { get; }

Methods

SetDisplay(CharacterType, bool)

Displays the specified character

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Declaration

public void SetDisplay(SevenSegment.CharacterType character, bool showDecimal = false)

Parameters

Type	Name
Meadow.Foundation.Displays.Led.SevenSegment.CharacterType	character
System.Boolean	showDecimal

SetDisplay(char, bool)

Displays the specified valid character

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Declaration

public void SetDisplay(char character, bool showDecimal = false)

Parameters

Type	Name
System.Char	character
System.Boolean	showDecimal

Dispose()

Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.

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Declaration

public void Dispose()

Dispose(bool)

Dispose of the object

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Declaration

protected virtual void Dispose(bool disposing)

Parameters

Type	Name	Description
System.Boolean	disposing	Is disposing

Implements

• System.IDisposable