LabVIEW - Accelerometer Bricklet¶

Simple¶

Download (Example Simple.vi)

Callback¶

Download (Example Callback.vi), Download (Example Callback - Acceleration Callback.vi)

Threshold¶

Download (Example Threshold.vi), Download (Example Threshold - AccelerationReached Callback.vi)

Graph¶

Download (Example Graph.vi), Download (Example Graph - Acceleration Callback.vi)

Basic Functions¶

BrickletAccelerometer(uid, ipcon) → accelerometer¶

Input:	uid -- String ipcon -- .NET Refnum (IPConnection)
Output:	accelerometer -- .NET Refnum (BrickletAccelerometer)

Creates an object with the unique device ID uid. This object can then be used after the IP Connection is connected (see examples above).

BrickletAccelerometer.GetAcceleration() → x, y, z¶

Output:	x -- Int16 y -- Int16 z -- Int16

Returns the acceleration in x, y and z direction. The values are given in g/1000 (1g = 9.80665m/s²), not to be confused with grams.

If you want to get the acceleration periodically, it is recommended to use the AccelerationCallback callback and set the period with SetAccelerationCallbackPeriod().

BrickletAccelerometer.GetTemperature() → temperature¶

Output:	temperature -- Int16

Returns the temperature of the accelerometer in °C.

BrickletAccelerometer.LEDOn()¶

Enables the LED on the Bricklet.

BrickletAccelerometer.LEDOff()¶

Disables the LED on the Bricklet.

BrickletAccelerometer.IsLEDOn() → on¶

Output:	on -- Boolean

Returns true if the LED is enabled, false otherwise.

Advanced Functions¶

BrickletAccelerometer.SetConfiguration(dataRate, fullScale, filterBandwidth)¶

Input:	dataRate -- Byte fullScale -- Byte filterBandwidth -- Byte

Configures the data rate, full scale range and filter bandwidth. Possible values are:

• Data rate of 0Hz to 1600Hz.
• Full scale range of ±2g up to ±16g.
• Filter bandwidth between 50Hz and 800Hz.

Decreasing data rate or full scale range will also decrease the noise on the data.

The default values are 100Hz data rate, ±4g range and 200Hz filter bandwidth.

The following constants are available for this function:

• BrickletAccelerometer.DATA_RATE_OFF = 0
• BrickletAccelerometer.DATA_RATE_3HZ = 1
• BrickletAccelerometer.DATA_RATE_6HZ = 2
• BrickletAccelerometer.DATA_RATE_12HZ = 3
• BrickletAccelerometer.DATA_RATE_25HZ = 4
• BrickletAccelerometer.DATA_RATE_50HZ = 5
• BrickletAccelerometer.DATA_RATE_100HZ = 6
• BrickletAccelerometer.DATA_RATE_400HZ = 7
• BrickletAccelerometer.DATA_RATE_800HZ = 8
• BrickletAccelerometer.DATA_RATE_1600HZ = 9
• BrickletAccelerometer.FULL_SCALE_2G = 0
• BrickletAccelerometer.FULL_SCALE_4G = 1
• BrickletAccelerometer.FULL_SCALE_6G = 2
• BrickletAccelerometer.FULL_SCALE_8G = 3
• BrickletAccelerometer.FULL_SCALE_16G = 4
• BrickletAccelerometer.FILTER_BANDWIDTH_800HZ = 0
• BrickletAccelerometer.FILTER_BANDWIDTH_400HZ = 1
• BrickletAccelerometer.FILTER_BANDWIDTH_200HZ = 2
• BrickletAccelerometer.FILTER_BANDWIDTH_50HZ = 3

BrickletAccelerometer.GetConfiguration() → dataRate, fullScale, filterBandwidth¶

Output:	dataRate -- Byte fullScale -- Byte filterBandwidth -- Byte

Returns the configuration as set by SetConfiguration().

The following constants are available for this function:

• BrickletAccelerometer.DATA_RATE_OFF = 0
• BrickletAccelerometer.DATA_RATE_3HZ = 1
• BrickletAccelerometer.DATA_RATE_6HZ = 2
• BrickletAccelerometer.DATA_RATE_12HZ = 3
• BrickletAccelerometer.DATA_RATE_25HZ = 4
• BrickletAccelerometer.DATA_RATE_50HZ = 5
• BrickletAccelerometer.DATA_RATE_100HZ = 6
• BrickletAccelerometer.DATA_RATE_400HZ = 7
• BrickletAccelerometer.DATA_RATE_800HZ = 8
• BrickletAccelerometer.DATA_RATE_1600HZ = 9
• BrickletAccelerometer.FULL_SCALE_2G = 0
• BrickletAccelerometer.FULL_SCALE_4G = 1
• BrickletAccelerometer.FULL_SCALE_6G = 2
• BrickletAccelerometer.FULL_SCALE_8G = 3
• BrickletAccelerometer.FULL_SCALE_16G = 4
• BrickletAccelerometer.FILTER_BANDWIDTH_800HZ = 0
• BrickletAccelerometer.FILTER_BANDWIDTH_400HZ = 1
• BrickletAccelerometer.FILTER_BANDWIDTH_200HZ = 2
• BrickletAccelerometer.FILTER_BANDWIDTH_50HZ = 3

BrickletAccelerometer.GetAPIVersion() → apiVersion¶

Output:	apiVersion -- Byte[3]

Returns the version of the API definition (major, minor, revision) implemented by this API bindings. This is neither the release version of this API bindings nor does it tell you anything about the represented Brick or Bricklet.

BrickletAccelerometer.GetResponseExpected(functionId) → responseExpected¶

Input:	functionId -- Byte
Output:	responseExpected -- Boolean

Returns the response expected flag for the function specified by the function ID parameter. It is true if the function is expected to send a response, false otherwise.

For getter functions this is enabled by default and cannot be disabled, because those functions will always send a response. For callback configuration functions it is enabled by default too, but can be disabled by SetResponseExpected(). For setter functions it is disabled by default and can be enabled.

Enabling the response expected flag for a setter function allows to detect timeouts and other error conditions calls of this setter as well. The device will then send a response for this purpose. If this flag is disabled for a setter function then no response is send and errors are silently ignored, because they cannot be detected.

The following constants are available for this function:

• BrickletAccelerometer.FUNCTION_SET_ACCELERATION_CALLBACK_PERIOD = 2
• BrickletAccelerometer.FUNCTION_SET_ACCELERATION_CALLBACK_THRESHOLD = 4
• BrickletAccelerometer.FUNCTION_SET_DEBOUNCE_PERIOD = 6
• BrickletAccelerometer.FUNCTION_SET_CONFIGURATION = 9
• BrickletAccelerometer.FUNCTION_LED_ON = 11
• BrickletAccelerometer.FUNCTION_LED_OFF = 12

BrickletAccelerometer.SetResponseExpected(functionId, responseExpected)¶

Input:	functionId -- Byte responseExpected -- Boolean

Changes the response expected flag of the function specified by the function ID parameter. This flag can only be changed for setter (default value: false) and callback configuration functions (default value: true). For getter functions it is always enabled.

Enabling the response expected flag for a setter function allows to detect timeouts and other error conditions calls of this setter as well. The device will then send a response for this purpose. If this flag is disabled for a setter function then no response is send and errors are silently ignored, because they cannot be detected.

The following constants are available for this function:

• BrickletAccelerometer.FUNCTION_SET_ACCELERATION_CALLBACK_PERIOD = 2
• BrickletAccelerometer.FUNCTION_SET_ACCELERATION_CALLBACK_THRESHOLD = 4
• BrickletAccelerometer.FUNCTION_SET_DEBOUNCE_PERIOD = 6
• BrickletAccelerometer.FUNCTION_SET_CONFIGURATION = 9
• BrickletAccelerometer.FUNCTION_LED_ON = 11
• BrickletAccelerometer.FUNCTION_LED_OFF = 12

BrickletAccelerometer.SetResponseExpectedAll(responseExpected)¶

Input:	responseExpected -- Boolean

Changes the response expected flag for all setter and callback configuration functions of this device at once.

BrickletAccelerometer.GetIdentity() → uid, connectedUid, position, hardwareVersion, firmwareVersion, deviceIdentifier¶

Output:	uid -- String connectedUid -- String position -- Char hardwareVersion -- Byte[3] firmwareVersion -- Byte[3] deviceIdentifier -- Int32

Returns the UID, the UID where the Bricklet is connected to, the position, the hardware and firmware version as well as the device identifier.

The position can be 'a', 'b', 'c' or 'd'.

The device identifier numbers can be found here. There is also a constant for the device identifier of this Bricklet.

Callback Configuration Functions¶

BrickletAccelerometer.SetAccelerationCallbackPeriod(period)¶

Input:	period -- Int64

Sets the period in ms with which the AccelerationCallback callback is triggered periodically. A value of 0 turns the callback off.

The AccelerationCallback callback is only triggered if the acceleration has changed since the last triggering.

The default value is 0.

BrickletAccelerometer.GetAccelerationCallbackPeriod() → period¶

Output:	period -- Int64

Returns the period as set by SetAccelerationCallbackPeriod().

BrickletAccelerometer.SetAccelerationCallbackThreshold(option, minX, maxX, minY, maxY, minZ, maxZ)¶

Input:	option -- Char minX -- Int16 maxX -- Int16 minY -- Int16 maxY -- Int16 minZ -- Int16 maxZ -- Int16

Sets the thresholds for the AccelerationReachedCallback callback.

The following options are possible:

Option	Description
'x'	Callback is turned off
'o'	Callback is triggered when the acceleration is outside the min and max values
'i'	Callback is triggered when the acceleration is inside the min and max values
'<'	Callback is triggered when the acceleration is smaller than the min value (max is ignored)
'>'	Callback is triggered when the acceleration is greater than the min value (max is ignored)

The default value is ('x', 0, 0, 0, 0, 0, 0).

The following constants are available for this function:

• BrickletAccelerometer.THRESHOLD_OPTION_OFF = 'x'
• BrickletAccelerometer.THRESHOLD_OPTION_OUTSIDE = 'o'
• BrickletAccelerometer.THRESHOLD_OPTION_INSIDE = 'i'
• BrickletAccelerometer.THRESHOLD_OPTION_SMALLER = '<'
• BrickletAccelerometer.THRESHOLD_OPTION_GREATER = '>'

BrickletAccelerometer.GetAccelerationCallbackThreshold() → option, minX, maxX, minY, maxY, minZ, maxZ¶

Output:	option -- Char minX -- Int16 maxX -- Int16 minY -- Int16 maxY -- Int16 minZ -- Int16 maxZ -- Int16

Returns the threshold as set by SetAccelerationCallbackThreshold().

The following constants are available for this function:

• BrickletAccelerometer.THRESHOLD_OPTION_OFF = 'x'
• BrickletAccelerometer.THRESHOLD_OPTION_OUTSIDE = 'o'
• BrickletAccelerometer.THRESHOLD_OPTION_INSIDE = 'i'
• BrickletAccelerometer.THRESHOLD_OPTION_SMALLER = '<'
• BrickletAccelerometer.THRESHOLD_OPTION_GREATER = '>'

BrickletAccelerometer.SetDebouncePeriod(debounce)¶

Input:	debounce -- Int64

Sets the period in ms with which the threshold callback

• AccelerationReachedCallback

is triggered, if the threshold

• SetAccelerationCallbackThreshold()

keeps being reached.

The default value is 100.

BrickletAccelerometer.GetDebouncePeriod() → debounce¶

Output:	debounce -- Int64

Returns the debounce period as set by SetDebouncePeriod().

Callbacks¶

Callbacks can be registered to receive time critical or recurring data from the device. The registration is done by assigning a function to a callback property of the device object. The available callback property and their type of parameters are described below.

event BrickletAccelerometer.AccelerationCallback(sender, x, y, z)¶

Input:	sender -- .NET Refnum (BrickletAccelerometer) x -- Int16 y -- Int16 z -- Int16

This callback is triggered periodically with the period that is set by SetAccelerationCallbackPeriod(). The parameters are the X, Y and Z acceleration.

The AccelerationCallback callback is only triggered if the acceleration has changed since the last triggering.

event BrickletAccelerometer.AccelerationReachedCallback(sender, x, y, z)¶

Input:	sender -- .NET Refnum (BrickletAccelerometer) x -- Int16 y -- Int16 z -- Int16

This callback is triggered when the threshold as set by SetAccelerationCallbackThreshold() is reached. The parameters are the X, Y and Z acceleration.

If the threshold keeps being reached, the callback is triggered periodically with the period as set by SetDebouncePeriod().

Constants¶

BrickletAccelerometer.DEVICE_IDENTIFIER¶

This constant is used to identify a Accelerometer Bricklet.

The GetIdentity() function and the IPConnection.EnumerateCallback callback of the IP Connection have a deviceIdentifier parameter to specify the Brick's or Bricklet's type.

BrickletAccelerometer.DEVICE_DISPLAY_NAME¶

This constant represents the human readable name of a Accelerometer Bricklet.