Acquire Read Region DMA FIFO (G Dataflow)

Reference to an FPGA VI.

Obtain a reference using the Open FPGA Reference node.

Size of the buffer region this node acquires.

Time, in milliseconds, that the node waits to complete before reporting a timeout error. Wire a value of –1 to this input to wait indefinitely.

Default: 5000

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

Number of elements remaining in the host buffer part of the Target to Host FIFO that are available to read.

Reference to an FPGA VI.

Reference to the array of elements the device driver allocates.

You must delete this reference using the Delete Data Value Reference node before the driver can write new data to the specified portion of the buffer.

Total number of elements in the memory region this node acquires.

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.