Remarks

Nxp74HC4051
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

private Nxp74HC4051 mux;

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

    mux = new Nxp74HC4051(
        Device.CreateAnalogInputPort(Device.Pins.A00),      // input
        Device.CreateDigitalOutputPort(Device.Pins.D00),    // s0
        Device.CreateDigitalOutputPort(Device.Pins.D01),    // s1
        Device.CreateDigitalOutputPort(Device.Pins.D02),    // s2
        Device.CreateDigitalOutputPort(Device.Pins.D03)     // enable
        );

    return base.Initialize();
}

public override Task Run()
{
    Task.Run(ReadRoundRobin);

    return base.Run();
}

public async Task ReadRoundRobin()
{
    while (true)
    {
        for (var channel = 0; channel < 8; channel++)
        {
            mux.SetInputChannel(channel);
            var read = await mux.Signal.Read();
            Resolver.Log.Info($"ADC Channel {channel} = {read.Volts:0.0}V");
            await Task.Delay(1000);
        }
    }
}

Sample project(s) available on GitHub

Wiring Example

To wire a Nxp74HC4051 to your Meadow board, connect the following:

Nxp74HC4051	Meadow Pin
GND	GND
VCC	3V3
SCL	D08 (SCL Pin)
SDA	D07 (SDA Pin)

Characteristic	Locus
Inheritance	System.Object AnalogMuxBase > Nxp74HC4051
Implements	IAnalogInputMultiplexer
Inherited Members	AnalogMuxBase.SyncRoot AnalogMuxBase.EnablePort AnalogMuxBase.Signal AnalogMuxBase.Enable() AnalogMuxBase.Disable()
Namespace	Meadow.Foundation.ICs.IOExpanders
Assembly	AnalogMux.dll

Syntax

public class Nxp74HC4051 : AnalogMuxBase, IAnalogInputMultiplexer

Constructors

Nxp74HC4051(IAnalogInputPort, IDigitalOutputPort, Nullable<IDigitalOutputPort>, Nullable<IDigitalOutputPort>, Nullable<IDigitalOutputPort>)

Creates a new Nxp74HC4051 object using the default parameters

Declaration

public Nxp74HC4051(IAnalogInputPort z, IDigitalOutputPort s0, IDigitalOutputPort? s1 = null, IDigitalOutputPort? s2 = null, IDigitalOutputPort? enable = null)

Parameters

Type	Name	Description
IAnalogInputPort	z
IDigitalOutputPort	s0
System.Nullable<IDigitalOutputPort>	s1
System.Nullable<IDigitalOutputPort>	s2
System.Nullable<IDigitalOutputPort>	enable

Properties

S0

The port connected to the mux's S0 selection pin

Declaration

public IDigitalOutputPort S0 { get; }

Property Value

Type	Description
IDigitalOutputPort

S1

The port connected to the mux's S1 selection pin

Declaration

public IDigitalOutputPort? S1 { get; }

Property Value

Type	Description
System.Nullable<IDigitalOutputPort>

S2

The port connected to the mux's S2 selection pin

Declaration

public IDigitalOutputPort? S2 { get; }

Property Value

Type	Description
System.Nullable<IDigitalOutputPort>

Methods

SetInputChannel(Int32)

Sets the channel input (Y pin) that will be routed to the mux output (Z pin)

Declaration

public override void SetInputChannel(int channel)

Parameters

Type	Name	Description
System.Int32	channel

Overrides

AnalogMuxBase.SetInputChannel(Int32)