The Xilinx FDATool block provides an interface to the FDATool software available as part of the MATLAB® Signal Processing Toolbox.
The block does not function properly and should not be used if the Signal Processing Toolbox is not installed. This block provides a means of defining an FDATool object and storing it as part of a Model Composer model. FDATool provides a powerful means for defining digital filters with a graphical user interface.
Example of Use
Copy an FDATool block into a Subsystem where you would like to define a filter.
Double-clicking the block icon opens up an FDATool session and graphical user
interface. The filter is stored in an data structure internal to the FDATool
interface block, and the coefficients can be extracted using
helper functions provided as part of Model
Composer. The function call
xlfda_numerator('FDATool') returns the numerator of the transfer
function (e.g., the impulse response of a finite impulse response filter) of the
FDATool block named
'FDATool'. Similarly, the
retrieves the denominator for a non-FIR filter.
A typical use of the FDATool block is as a companion to an FIR filter block, where the
Coefficients field of the filter block is set to
xlfda_numerator('FDATool'). An example is shown in the
xlfda_numerator() can equally well be
used to initialize a memory block or a
'coefficient' variable for a masked Subsystem containing an FIR
This block does not use any hardware resources.
Double-clicking the icon in your Simulink
model opens up an FDATool session and its graphical user interface. Upon closing the
FDATool session, the underlying FDATool object is stored in the UserData parameter
of the Xilinx FDATool block. Use the
xlfda_numerator() helper function and
get_param() to extract information from the object as