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AR# 34136

System Generator for DSP 11.4 - When I select interpolation or decimation in the FIR Compiler GUI the corresponding rate change field remains grayed out

Description

When I select interpolation or decimation for the filter type in the System Generator FIR Compiler v5.0 GUI the corresponding "Decimation Rate Value" or "Interpolation Rate Value" field is grayed out and I am not able to enter a value.

Solution

This can occur if you are trying to specify a new filter type without having the coefficient vector populated with a defined value. This is a known issue with the FIR Compiler 5.0 as implemented in System Generator for DSP.

To work around this issue, ensure that your coefficient vector variable is defined in the workspace before opening the FIR Compiler GUI and making changes to the filter type. If you have already done this and cannot enable the field, you can select either interpolation or decimation (whichever one is currently not selected) and then change back to the desired value. This should enable the appropriate "Rate Value" field in the GUI.

This issue is scheduled to be resolved in a future release.

Linked Answer Records

Master Answer Records

AR# 34136
Date Created 01/14/2010
Last Updated 12/15/2012
Status Active
Type General Article