Hello Everyone, I am doing a project on Implementing 10/100 ethernet mac on a fpga using vhdl. I saw the link on fpga4fun.com, its implemented in verilog and also i am not sure why he included ipaddreses and udp header. i guess mac addresses of PC and fpga board should be sufficient. I have many questions on this. Infact i would like to speak with or chat with anyone who know something about this. I would really appreciate if you could give your messenger id or telephone number so that i can discuss about this for sometime.
MY MAIN OBJECTIVE AND FEW QUESTIONS:
I am implementing Ethernet MAC(ethernet packet transmit and receive modules) on fpga using vhdl and i am trying to transfer the data between the xilinx virtex 4 fpgaboard and the PC through the ethernet cable. There is a DP83847 Ethernet PHY chip on the fpga board. I need to test this chip, by sending and receiving ethernet frames between fpga and PC. I am attaching the xilinx virtex-4 fpga manual(page
17-ethernet) and the DP83847 ethernet data sheet for your reference. I am able to hardware reset the PHY on the fpga board. when i connect the fpga to PC through ethernet cable, i can see the link active on the PC. And also , by default whenever the PHY is being reset, its in full duplex mode.I understand that i need to write a small state machine, which creates an ethernet frame ie (preamble, destination address, source address, length/type, data, pad zero, crc) and send it 4 bits every clock cycle(txclock -MII interface) by making the transmit enable high. I didnt quite understand about implementing the analog part in the fpga, that you were saying in the end.
1)My ethernet frame consists of Preamble, destination address, source address, length/type, data, padded zeros, crc The destination and source address i am using the physical MAC address and not ip addresses, is it okay?2)How do i view on my PC , what ethernet frames are being sent from the fpga board. Is there any software which can detect the ethernet frame's sent to the pc. If yes, Please suggest?( ethernet frame consists of only mac addresses and no ip addresses).
thanks ashwin