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Chapter 3: Design Rules and Procedures
Updating HDL Import Blocks
Updating HDL Import Blocks
The HDL Import blocks in your design may need updating if you upgrade from a
previous software version or move a design to a different workstation.
You can use the alt_dspbuilder_refresh_hdlimport command to update these
blocks. This command checks that the referenced HDL files (or Quartus II project)
exists. If it finds the references, the HDL Import dialog box opens and a compilation is
automatically invokes to regenerate the Simulink model. If it finds neither, but there is
an existing simulation netlist, it uses this netlist for simulation.
To run the command, follow these steps:
1. Start the MATLAB or Simulink software.
2. Open a Simulink model that contains imported HDL.
3. Run the command by typing the following at the MATLAB prompt:
alt_dspbuilder_refresh_hdlimport r
You can optionally select a HDL Import block to run the command on only the selected
subsystem.
Analyzing the Hardware Resource Usage
To analyze the hardware resources required for your design with a Resource Usage
block, follow these steps:
1. Select the AltLab library from the Altera DSP Builder BlockSet folder in the
Simulink Library Browser.
2. Drag and drop a Resource Usage block into your model and double-click on the
block to open the Resource Usage dialog box.
DSP Builder Handbook
Volume 2: DSP Builder Standard Blockset
November 2013 Altera Corporation
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