Meadow.Foundation.Sensors.Motion.Mma7660fc

Mma7660fc
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

Mma7660fc sensor;

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

    // create the sensor driver
    sensor = new Mma7660fc(Device.CreateI2cBus());

    // classical .NET events can also be used:
    sensor.Updated += (sender, result) =>
    {
        Resolver.Log.Info($"Accel: [X:{result.New.X.MetersPerSecondSquared:N2}," +
            $"Y:{result.New.Y.MetersPerSecondSquared:N2}," +
            $"Z:{result.New.Z.MetersPerSecondSquared:N2} (m/s^2)]" +
            $" Direction: {sensor.Direction}" +
            $" Orientation: {sensor.Orientation}");
    };

    // Example that uses an IObservable subscription to only be notified when the filter is satisfied
    var consumer = Mma7660fc.CreateObserver(
        handler: result => Resolver.Log.Info($"Observer: [x] changed by threshold; new [x]: X:{result.New.X:N2}, old: X:{result.Old?.X:N2}"),
        // only notify if there's a greater than 0.5G change in the Z direction
        filter: result =>
        {
            if (result.Old is { } old)
            {
                return ((result.New - old).Z > new Acceleration(0.5, AU.Gravity));
            }
            return false;
        });
    sensor.Subscribe(consumer);

    return Task.CompletedTask;
}

public async override Task Run()
{
    //==== one-off read
    var result = await sensor.Read();
    Resolver.Log.Info("Initial Readings:");
    Resolver.Log.Info($"Accel: [X:{result.X.MetersPerSecondSquared:N2}," +
        $"Y:{result.Y.MetersPerSecondSquared:N2}," +
        $"Z:{result.Z.MetersPerSecondSquared:N2} (m/s^2)]");

    sensor.StartUpdating(TimeSpan.FromMilliseconds(1000));
}

Sample project(s) available on GitHub

Class Mma7660fc

Represents Mma7660fc 3-axis accelerometer

Assembly: Mma7660fc.dll

View Source

Declaration

public class Mma7660fc : ByteCommsSensorBase<Acceleration3D>, IObservable<IChangeResult<Acceleration3D>>, IDisposable, IAccelerometer, ISamplingSensor<Acceleration3D>, ISensor<Acceleration3D>, ISensor, ISamplingSensor, II2cPeripheral

Inheritance: System.Object -> Meadow.Foundation.ObservableBase<UNIT>

Implements:
System.IObservable<Meadow.IChangeResult<Meadow.Units.Acceleration3D>>, System.IDisposable, Meadow.Peripherals.Sensors.Motion.IAccelerometer, Meadow.Peripherals.Sensors.ISamplingSensor<Meadow.Units.Acceleration3D>, Meadow.Peripherals.Sensors.ISensor<Meadow.Units.Acceleration3D>, Meadow.Peripherals.Sensors.ISensor, Meadow.Peripherals.Sensors.ISamplingSensor, Meadow.Hardware.II2cPeripheral

Properties

DefaultI2cAddress

The default I2C address for the peripheral

View Source

Declaration

public byte DefaultI2cAddress { get; }

Acceleration3D

Current Acceleration3d value

View Source

Declaration

public Acceleration3D? Acceleration3D { get; }

Direction

Get the current direction value

View Source

Declaration

public Mma7660fc.DirectionType Direction { get; set; }

Orientation

Get the current orientation

View Source

Declaration

public Mma7660fc.OrientationType Orientation { get; set; }

Methods

SetSampleRate(SampleRate)

Set sample rate in samples per second

View Source

Declaration

public void SetSampleRate(Mma7660fc.SampleRate rate)

Parameters

Type	Name	Description
Meadow.Foundation.Sensors.Motion.Mma7660fc.SampleRate	rate	sample rate

ReadSensor()

Read sensor data from registers

View Source

Declaration

protected override Task<Acceleration3D> ReadSensor()

Returns

System.Threading.Tasks.Task<Meadow.Units.Acceleration3D>

Implements

• System.IObservable<Meadow.IChangeResult<Meadow.Units.Acceleration3D>>
• System.IDisposable
• Meadow.Peripherals.Sensors.Motion.IAccelerometer
• Meadow.Peripherals.Sensors.ISamplingSensor<Meadow.Units.Acceleration3D>
• Meadow.Peripherals.Sensors.ISensor<Meadow.Units.Acceleration3D>
• Meadow.Peripherals.Sensors.ISensor
• Meadow.Peripherals.Sensors.ISamplingSensor
• Meadow.Hardware.II2cPeripheral