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Chapter 4: Using MegaCore Functions
4–3
MegaCore Function Design Example
Parameterizing the MegaCore Function Variation
Double-click the MegaCore function block to open the IP Toolbench or MegaWizard
interface.
1
You can also double-click on a block to re-open and modify a previously
parameterized MegaCore function variation.
Generating the MegaCore Function Variation
Before you can connect the block to your design, generate a MegaCore function
variation after you have parameterized the MegaCore function.
Click Generate in IP Toolbench (or Finish in the MegaWizard interface) to generate
the necessary files for your MegaCore function variation.
DSP Builder also performs an additional step of optimizing your model for use in
Simulink.
Connecting the MegaCore Function Variation Block to the Design
The Simulink block now has the required input and output ports as parameterized in
IP Toolbench or the MegaWizard interface. You can connect these ports to other Altera
DSP Builder blocks in your Simulink design.
Simulating the MegaCore Function Variation in the Model
You can simulate the Simulink block representing the MegaCore function variation
like any other block from the Simulink Library Browser.
1
Ensure that the Simulink simulation engine is set to use the discrete solver by
selecting fixed-step type under Solver Options in the Configuration Parameters
dialog box.
You should reset the MegaCore function at the start of the simulation to avoid any
functional discrepancy between RTL simulation and Simulink simulation ( “Startup &
Initial Conditions” on page 3–17 ).
MegaCore Function Design Example
This tutorial shows how to create a custom low-pass FIR filter MegaCore function
variation using the IP Toolbench interface.
1
This tutorial assumes that your PC has the Altera MegaCore IP Library.
Creating a New Simulink Model
To create a new Simulink workspace, follow these steps:
1. Start DSP Builder in MATLAB, on Windows OS, click on Start , point to All
Programs , click Altera <version> , click DSP Builder , and click Start in MATLAB
version XX .
November 2013
Altera Corporation
DSP Builder Handbook
Volume 2: DSP Builder Standard Blockset
发布紧急采购，3分钟左右您将得到回复。
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