Meadow.Foundation.ICs.IOExpanders.Nxp74HC4051

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)

Class Nxp74HC4051

Represents an NXP 74HC4051 8-channel analog multiplexer

Assembly: AnalogMux.dll

View Source

Declaration

public class Nxp74HC4051 : AnalogMuxBase, IAnalogInputMultiplexer

Inheritance: System.Object -> Meadow.Foundation.ICs.IOExpanders.AnalogMuxBase

Implements:
Meadow.Foundation.ICs.IOExpanders.IAnalogInputMultiplexer

Properties

S0

The port connected to the mux's S0 selection pin

View Source

Declaration

public IDigitalOutputPort S0 { get; }

S1

The port connected to the mux's S1 selection pin

View Source

Declaration

public IDigitalOutputPort? S1 { get; }

S2

The port connected to the mux's S2 selection pin

View Source

Declaration

public IDigitalOutputPort? S2 { get; }

Methods

SetInputChannel(int)

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

View Source

Declaration

public override void SetInputChannel(int channel)

Parameters

Type	Name
System.Int32	channel

Exceptions

System.ArgumentOutOfRangeException

Implements

• Meadow.Foundation.ICs.IOExpanders.IAnalogInputMultiplexer