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154 www.xilinx.com Ethernet AVB Endpoint User Guide
UG492 July 23, 2010
Chapter 15: Detailed Example Design (Standard Format)
The data field of the frame is designed to create a simple 8-bit binary counter that continues
seamlessly across consecutive Ethernet frames. The Ethernet Frame Stimulus block is
designed to produce frames at full line rate to fully stress the core.
Ethernet Frame Checker
The following files describe the Ethernet Frame Checker logic.
VHDL
<project_dir>/<component_name>/example_design/rx_frame_checker.vhd
Verilog
<project_dir>/<component_name>/example_design/rx_frame_checker.v
This module contains the logic to check a received Ethernet frame against expected
parameters. The MAC header fields of this expected frame are defined by generics
(Destination Address, Source Address, Length/Type); the VLAN field is optional.
Additionally, the expected length of the Ethernet frame can also be set using a parameter.
The data field of the frame is expected to consist of a simple 8-bit binary counter which
continues seamlessly across consecutive Ethernet frames.
This logic is designed to check against the frames generated by the tx_frame_stimulus
module; identical parameters must be passed into both modules to obtain a match.
Loopback Module
The following files describe the Loopback module.
VHDL
<project_dir>/<component_name>/example_design/temac_loopback_shim.vhd
Verilog
<project_dir>/<component_name>/example_design/temac_loopback_shim.v
This logic implements a simple logic shim to provide a frame loopback function at the
MAC client Interface. This logic does NOT implement a MAC and should be replaced with
a real MAC in any real implementations.