Table Of Contents

FIFO Property (Clock-Driven Logic)

Last Modified: February 27, 2020

Gets various properties associated with the selected FIFO.

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FIFO reader and writer in

Reference to the FIFO.

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error in

Error conditions that occur before this node runs.

The node responds to this input according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error error in contains an error
If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Default: No error

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FIFO reader and writer out

Reference to the FIFO.

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error out

Error information.

The node produces this output according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error error in contains an error
If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.
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used elements

Number of elements currently stored in the FIFO.

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full threshold met?

Boolean value that indicates whether the number of elements available for read operations is greater than or equal to the full threshold of this FIFO.

True The number of elements available for read operations is greater than or equal to the full threshold of this FIFO.
False The number of elements available for read operations is less than the full threshold of this FIFO.
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free elements

Number of unused elements contained in this FIFO.

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empty threshold met?

Boolean value that indicates whether the number of elements available for write operations is greater than or equal to the empty threshold of this FIFO.

True The number of elements available for write operations is greater than or equal to the empty threshold of this FIFO.
False The number of elements available for write operations is less than to the empty threshold of this FIFO.

Where This Node Can Run:

Desktop OS: none

FPGA: All devices

Web Server: Not supported in VIs that run in a web application


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