DFD FXP Modeling VI

Digital Filter Design VIs and Functions

DFD FXP Modeling VI

Owning Palette: Fixed-Point Tools VIs

Installed With: Digital Filter Design Toolkit

Creates a fixed-point filter model according to the input and output word length settings.

Note To avoid errors in generating code from a fixed-point filter, ensure that you configure the quantizers according to the guidelines in the Details section of the DFD FXP Set Quantizer VI.

Place on the block diagram

Find on the Functions palette

filter in specifies the input filter.

input word length specifies the word length, in number of bits, that this VI uses to represent the input signal. The valid range is [1, 32]. The default is 16.

output word length specifies the word length, in number of bits, that this VI uses to represent the output signal. The valid range is [1, 32]. The default is 16.

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.

output rounding mode specifies the rounding mode this VI uses in the output quantizer.

0	Nearest—Rounds to the closest representable number.
1	Truncation (default)—Rounds to the closest representable number less than the original value.

filter out returns a fixed-point filter.

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.

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