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Converts an FPGA VI-specific reference to a more generic reference. You then can use common code to interact with different FPGA VIs. The FPGA targets must be of the same class. You might want to use this function if you want to evaluate different algorithms in a host VI without rewriting the host VI. You cannot use this function with DMA FIFOs. Some FPGA targets might not support this function. Refer to the specific FPGA target hardware documentation for more information.

Tip  When you pass references to subVIs or when you use references in other objects, such as constants, controls, or indicators, consider creating type definitions for the references. You can quickly update the code if you later change the FPGA VI front panel.

Details  

	FPGA VI Reference In is the reference to the FPGA VI running on the FPGA target. You must open a reference to the FPGA VI to use this parameter.
	error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node. status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE. code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source specifies the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
	FPGA VI Reference Out returns a reference to the FPGA target. If you select Interface from the shortcut menu, FPGA VI Reference Out also returns information about the VI, including controls, indicators, data types, and the connector pane, but not including the VI filename. You can bind the FPGA VI Reference Out parameter to type definitions so that LabVIEW automatically propagates configuration changes to subsequent subVIs in the data flow.
	error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error. status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred. code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

Up Cast Details

Right-click the Up Cast function and select Interface from the shortcut menu to output VI information and target information. Use the Interface option to pass data to the Read/Write Control function, Invoke Method function, or Call VI function. If you select the Interface option, the FPGA VIs and targets must meet the following requirements: the front panel windows of the FPGA VIs are the same, the control and indicator tab order matches, and you use only one clock domain on the FPGA VI block diagram.

Right-click the Up Cast function and select Target from the shortcut menu to output only target information. Use the Target option to pass data to the Invoke Method function. The default is Target.