Version 1.2 (R14SP2) Filter Design HDL Coder™ Release Notes

Version 1.2 (R14SP2) Filter Design HDL Coder

This table summarizes what's new in V1.2 (R14SP2):

New features and changes introduced in this version are

• Additional Multirate and Discrete Filter Types Supported

• Code Generation Support for Interpolating Filters in Cascades

• InitializeRealSignals Property and GUI Option Removed

Additional Multirate and Discrete Filter Types Supported

The coder now adds code generation support for the following multirate and discrete filter types:

• Direct-Form FIR Polyphase Interpolator (mfilt.firinterp)

• Direct-Form FIR Polyphase Decimator (mfilt.firdecim)

• FIR Hold Interpolator (mfilt.holdinterp)

• FIR Linear Interpolator (mfilt.linearinterp)

• Discrete-Time Scalar (dfilt.scalar)

For a complete list of filter structures supported for code generation, see Key Features and Components in the Filter Design HDL Coder online documentation.

Code Generation Support for Interpolating Filters in Cascades

In the previous release, only decimators and/or single-rate filter structures could be included in a cascade for code generation purposes.

The coder now supports code generation for cascades that include interpolators. You can generate code for cascades that combine the following filter types:

• Decimators and/or single-rate filter structures

• Interpolators and/or single-rate filter structures

Code generation for cascades that include both decimators and interpolators is not currently supported, however.

See also Generating Code for Cascade Filters in the Filter Design HDL Coder online documentation.

InitializeRealSignals Property and GUI Option Removed

The coder now always initializes signals of type REAL with a value of 0.0.

In previous releases, initialization code for real signals was generated optionally. Generation of such initialization code was controlled by the InitializeRealSignals property and the corresponding Initialize real signals option in the Advanced pane of the HDL Options dialog box. The Initialize real signals option is no longer supported and has been removed from the Advanced pane. The InitializeRealSignals property is set to 'on' and is no longer user settable.

Compatibility Considerations

Consider removing code that sets the InitializeRealSignals property.

Version 1.3 (R14SP3) Filter Design HDL Coder Software

Compatibility Summary for Filter Design HDL Coder Software