Meadow.Foundation.ICs.IOExpanders.Mcp3004

Mcp3004
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

Mcp3004 mcp;

IAnalogInputPort port;

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

    IDigitalOutputPort chipSelectPort = Device.CreateDigitalOutputPort(Device.Pins.D01);

    mcp = new Mcp3004(Device.CreateSpiBus(), chipSelectPort);

    port = mcp.CreateAnalogInputPort(mcp.Pins.CH0, 32, TimeSpan.FromSeconds(1), new Voltage(3.3, Voltage.UnitType.Volts), Mcp3xxx.InputType.SingleEnded);

    port.Updated += (s, result) =>
    {
        Resolver.Log.Info($"Analog event, new voltage: {result.New.Volts:N2}V, old: {result.Old?.Volts:N2}V");
    };

    var observer = IAnalogInputPort.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Analog observer triggered; new: {result.New.Volts:n2}V, old: {result.Old?.Volts:n2}V");
        },
        filter: result =>
        {
            if (result.Old is { } oldValue)
            {
                return (result.New - oldValue).Abs().Volts > 0.1;
            }
            else { return false; }
        }
    );
    port.Subscribe(observer);

    return base.Initialize();
}

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

    port.StartUpdating();

    return Task.CompletedTask;
}

Sample project(s) available on GitHub

Code Example​

Code Example