Remarks

ADXL362
Status	Not Tested
Source code	GitHub
NuGet package	Not published

ADXL362 is an ultra-low power, 3-axis MEMS accelerometer that consumes less than 2 μA at a 100 Hz output data rate and 270 nA when in motion triggered wake-up mode.

The ADXL362 is controlled via I2C.

Sample projects available on GitHub

Purchasing

The ADXL362 is available on a small breakout board:

• Sparkfun ADXL362 Breakout Board

Usage

The ADXL362 can operating in interrupt and polling mode. Polling applications are responsible for determining when a sensor is read. Interrupt applications will be notified when the sensor reading changes by + / - a threshold value.

Wiring Example

Characteristic	Locus
Inheritance	System.Object > Adxl362
Inherited Members	System.Object.ToString() System.Object.Equals(System.Object) System.Object.Equals(System.Object, System.Object) System.Object.ReferenceEquals(System.Object, System.Object) System.Object.GetHashCode() System.Object.GetType() System.Object.MemberwiseClone()
Namespace	Meadow.Foundation.Sensors.Motion
Assembly	ADXL362.dll

Syntax

public class Adxl362

Constructors

Adxl362(IIODevice, ISpiBus, IPin, UInt16)

Create a new ADXL362 object using the specified SPI module.

Declaration

public Adxl362(IIODevice device, ISpiBus spiBus, IPin chipSelect, ushort speed = 10)

Parameters

Type	Name	Description
IIODevice	device
ISpiBus	spiBus	Spi Bus object
IPin	chipSelect	Chip select pin.
System.UInt16	speed

Fields

_adxl362

ADXL362 sensor object.

Declaration

protected readonly ISpiPeripheral _adxl362

Field Value

Type	Description
ISpiPeripheral

Properties

ActivityDetected

Indicate if any activity has been detected over the specified threshold.

Declaration

public bool ActivityDetected { get; }

Property Value

Type	Description
System.Boolean

ActivityInactivityControl

Activity / Inactivity control register (see page 29 of the data sheet).

Declaration

public byte ActivityInactivityControl { get; set; }

Property Value

Type	Description
System.Byte

Awake

Indicate if the sensor is awake or inactive.

Declaration

public bool Awake { get; }

Property Value

Type	Description
System.Boolean

DataReady

Indicate of data is ready to be read.

Declaration

public bool DataReady { get; }

Property Value

Type	Description
System.Boolean

DeviceID

Read the device ID, MEMS ID, Part ID and silicon revision ID and encode the value in a 32-bit integer.

Declaration

public int DeviceID { get; }

Property Value

Type	Description
System.Int32

FIFOOverrun

Indicate if the FIFO buffer has overrun (newly generated data is overwriting data already stored in the FIFO buffer.

Declaration

public bool FIFOOverrun { get; }

Property Value

Type	Description
System.Boolean

FIFOReady

Indicate if there is any data in the FIFO buffer.

Declaration

public bool FIFOReady { get; }

Property Value

Type	Description
System.Boolean

FIFOWatermark

Indicate if there are at least the desired number of samples in the FIFO buffer.

Declaration

public bool FIFOWatermark { get; }

Property Value

Type	Description
System.Boolean

FilterControl

Get / set the filter control register (see page 33 of the data sheet).

Declaration

public byte FilterControl { get; set; }

Property Value

Type	Description
System.Byte

InactivityDetected

Indicate if the sensor has detected inactivity or a free fall condition.

Declaration

public bool InactivityDetected { get; }

Property Value

Type	Description
System.Boolean

SelfTest

Set the value of the self test register. Setting this to true will put the device into self test mode, setting this to false will turn off the self test.

Declaration

public bool SelfTest { set; }

Property Value

Type	Description
System.Boolean

Status

Read the status register.

Declaration

public byte Status { get; }

Property Value

Type	Description
System.Byte

Temperature

Sensor temperature.

Declaration

public double Temperature { get; }

Property Value

Type	Description
System.Double

X

X-axis sensor reading.

Declaration

public short X { get; }

Property Value

Type	Description
System.Int16

Remarks

Read must be called before this property is valid.

Y

Y-axis sensor reading.

Declaration

public short Y { get; }

Property Value

Type	Description
System.Int16

Remarks

Read must be called before this property is valid.

Z

Z-axis sensor reading.

Declaration

public short Z { get; }

Property Value

Type	Description
System.Int16

Remarks

Read must be called before this property is valid.

Methods

ConfigureActivityThreshold(UInt16, Byte)

Configure the activity threshold and activity time. Once configured it will be necessary to set the activity/inactivity control and interrupts if required.

Declaration

public void ConfigureActivityThreshold(ushort threshold, byte numberOfSamples)

Parameters

Type	Name	Description
System.UInt16	threshold	11-bit unsigned value for the activity threshold.
System.Byte	numberOfSamples	Number of consecutive samples that must exceed the threshold

ConfigureInactivityThreshold(UInt16, UInt16)

Configure the inactivity threshold and activity time. Once configured it will be necessary to set the activity/inactivity control and interrupts if required.

Declaration

public void ConfigureInactivityThreshold(ushort threshold, ushort numberOfSamples)

Parameters

Type	Name	Description
System.UInt16	threshold	11-bit unsigned value for the activity threshold.
System.UInt16	numberOfSamples	Number of consecutive samples that must exceed the threshold

ConfigureInterrupts(IIODevice, Byte, IPin, Byte, IPin)

Configure the interrupts for the ADXL362.

Declaration

public void ConfigureInterrupts(IIODevice device, byte interruptMap1, IPin interruptPin1, byte interruptMap2 = 0, IPin interruptPin2 = null)

Parameters

Type	Name	Description
IIODevice	device
System.Byte	interruptMap1	Bit mask for interrupt pin 1
IPin	interruptPin1	Pin connected to interrupt pin 1 on the ADXL362.
System.Byte	interruptMap2	Bit mask for interrupt pin 2
IPin	interruptPin2	Pin connected to interrupt pin 2 on the ADXL362.

Reset()

Reset the sensor.

Declaration

public void Reset()

Start()

Start making sensor readings.

Declaration

public void Start()

Stop()

Stop sensor readings.

Declaration

public void Stop()

Update()

Read the sensors and make the readings available through the X, Y and Z properties.

Declaration

public void Update()

Events

AccelerationChanged

Event to be raised when the acceleration is greater than the activity registers.

Declaration

public event SensorVectorEventHandler AccelerationChanged

Event Type

Type	Description
SensorVectorEventHandler