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Element Icon NI Port Element
Info
Category: Communications AddIn: National Instruments
Creator: OkazoLab Team Scope: Parent Event
Owns Snippets: Triggered Usage: Runtime Screen,Snippets
NI Port element allows sending and receiving data via digital ports on the National Instruments DAQ cards. The element can be used in standard experimental tasks, for example, for sending synchronization triggers/markers to an EEG recording station.


Description

This element shares a working logic with LPT Port element. Check the wiki page of LPT Port element for a full guidance.

Generic Properties

NameDescriptionConstraintsValue TypeUpon Runtime Change
Port Settings
Port NameDefines what NI port is selected for communication String

+=== Properties inherited from clParallelPortElement === Inherited properties of clParallelPort
NameDescriptionConstraintsValue TypeUpon Runtime Change
Port Settings
Working ModeDefines a working mode for the element.Select the 'Output on event onset' mode for sending signals synchronously with an onset of the parent event,or 'Triggering on input' mode for catching the particular pattern in port input. For custom reading/writing scenarios use the 'Manual IO' mode, in which port communications can be controlled by your code.Int32
Output
Test OutputSends a test output signal through the port using the selected signal profile and the current Output Value.
Signal ProfileDefines the time-amplitude profile of the output signal. The 'Level Change', 'Pulse' and 'TTL' profiles are available. Last two can be used to send the EEG triggers. Int32
Preface DurationDefines the duration (ms) of the guarantied zero preface interval for the TTL or Pulse signals. Increase the preface duration marginally, if your recording hardware does not detect port signals. Note that a non-zero preface delays the onset of the actual signal. Double
Pulse DurationDuration of an output pulse in ms. The value is applied only, if the Pulse signal profile is selected. UInt64
Output ValueValue to be sent through the port. Can be defined in integer or binary format, e.g. Output='01010000'; or Output=255; clBinaryInteger
Send NowRuntime command that that initiates an instant transfer of the current output value through the port. Manual command calls at runtime are only required, if the element works in the Manual I/O mode.BooleanExecute the command by assigning true in code: SendNow=true;
Input
Test InputOpen a input monitor window showing real-time port input with the current settings. Use it for testing at designtime.
Input ValueReturns the current state of the port input lines. The property is not updated automatically.
Manual reading of the property value in snippets is required to obtain the current input.
The value can be read either to the integer or binary formats, e.g. 'string S=Input;' may return '01010101'.
clBinaryInteger
Triggering Inputeturns the current state of the port input lines. The property is not updated automatically. Manual reading of the property value in snippets is required to obtain the current input.
The value can be read either to the integer or binary formats, e.g. 'string S=Input;' may return '01010101'.
String
Trigger OnceReturns the current state of the port input lines. The property is not updated automatically. Manual reading of the property value in snippets is required to obtain the current input. The value can be read either to the integer or binary formats, e.g. 'string S=Input;' may return '01010101'Boolean
Runtime Status
Is TriggeredIndicates whether the element has been triggered at least once, since activation of the parent event. Triggering occurs only in the 'Input Detection' working mode.Boolean
Trigger TimeIndicates the local event time of the last element triggering. Triggering occurs only in the 'Input Detection' working mode.UInt64

+=== Properties inherited from clElement === Inherited properties of clElement
NameDescriptionConstraintsValue TypeUpon Change
Control
Is EnabledIf set to false the element is completely omitted when the experiment is run.Boolean
TitleTitle of the element.String
  Name Size
- NIPortIcon.jpg 1.78 KB
- NIPortIcon.png 1.67 KB

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