IPR-CRC Altera, IPR-CRC Datasheet - Page 24

• Manufacturer Part Number: IPR-CRC
• Description: IP CORE Renewal Of IP-CRC
• Manufacturer: Altera

Specifications of IPR-CRC

• Software Application: IP CORE, Interface And Protocols, COMMUNICATION
• Supported Families: Arria GX, Cyclone, HardCopy, Stratix
• Core Architecture: FPGA
• Core Sub-architecture: Arria, Cyclone, Stratix
• Rohs Compliant: NA
• Lead Free Status / RoHS Status: na

3–8
Figure 3–11. Testbench Architecture
Running the Testbench Example
CRC Compiler User Guide
Data generator
The packet generator module creates sample message words (packets without CRCs).
The CRC generator creates a checksum, which the merge module appends to the end
of the packet. The merge module delays the data to account for generator processing
time. The result is a codeword. The channel module inserts errors in the codewords,
as indicated by the errorInserted signal. The CRC checker indicates the presence
of errors in the received codewords. The testbench shows detected errors using the
errorDetected signal.
In this section you run the testbench example to illustrate how you do the following
tasks:
■
■
■
■
When you create a MegaCore function variation and turn on the Generate
Simulation Model option on the EDA page, the Quartus II software generates the
simulation model in the project directory. The simulation model is an Intellectual
Property Functional Simulation (IPFS) model with a file extension of .vo or .vho,
depending on the language you select. It also creates an example design in the
testbench subdirectory. The testbench subdirectory contains the data generator,
merge, and channel modules for the example testbench in the following files:
■
■
■
■
Create a testbench project using the Quartus II New Project Wizard
Create simulation models for the generator and checker using the MegaWizard
interface
Set EDA Tool Settings to simulate your testbench project
Run compilation and analysis
A top-level simulation file, tb.v or tb.vhd.
crcdemo.v(hd) for a single channel MegaCore function or
crcdemo_multichan.v(hd) for a multichannel MegaCore function
A generator variation file, crcgen.v(hd) for a single channel MegaCore function or
crcgen_multichan.v(hd) for a multichannel MegaCore function.
The corresponding checker variation file, crcchk.v(hd) for a single channel
MegaCore or crcchk_multichan.v(hd) for a multichannel MegaCore.
Generator
Message
CRC
word
Merge
Preliminary
Codeword
Channel
Codeword
+ errors
© November 2009 Altera Corporation
CRC checker
Chapter 3: Functional Description
Running the Testbench Example
status
Error