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DE2-70 User Manual
79
address in the packet is identical to the MAC address of the DE2-70 board. If the packet received
does have the same MAC address or is a broadcast packet, the DM9000A will accept the packet and
send an interrupt to the Nios II processor. The processor will then display the packet contents in the
Nios II IDE console window.
Figure 6.11. Packet sending and receiving using the Nios II processor.
Demonstration Setup, File Locations, and Instructions
• Project directory: DE2_70_NET
• Bit stream used: DE2_70_NET.sof
• Nios II Workspace: DE2_70_NET\Software
• Plug a CAT5 loop-back cable into the Ethernet connector of DE2-70
• Load the bit stream into the FPGA
• Run the Nios II IDE under the workspace DE2_70_NET
• Click on the Compile and Run button
• You should now be able to observe the contents of the packets received (64-byte packets
sent, 68-byte packets received because of the extra checksum bytes)
Figure 6.12 illustrates the setup for this demonstration.