Sigma DE2-70 User Manual

 

DE2-70 User Manual

 

78 

 

 
 

 

Figure 6.10.  The setup for the Karaoke Machine. 

 

In this demonstration, we will show how to send and receive Ethernet packets using the Fast 

Ethernet controller on DE2-70 board. As illustrated in Figure 6.11, we use the Nios II processor to 

send and receive Ethernet packets using the DM9000A Ethernet PHY/MAC Controller. The 

demonstration can be set up to use either a loop-back connection from one board to itself, or two 

DE2-70 boards connected together. 

 

On the transmitting side, the Nios II processor sends 64-byte packets every 0.5 seconds to the 

DM9000A. After receiving the packet, the DM9000A appends a four-byte checksum to the packet 

and sends it to the Ethernet port. 

On the receiving side, the DM9000A checks every packet received to see if the destination MAC