Components/Ethernet/IPs/MII Testbench

MII Sender

The MII Sender can read a *.eth file and sends the stored packets over a 10/100Mpbs MII Interface to the Ethernet Receiver.

Inside the *.eth file several commands are possible

MII Sender Commands

Command	Value1	Value2	Description	Example
at	integer	timebase	continue the file process at that absolut simulation time	at 1us
wait	integer	timebase	Wait processing the file for the given amount of time	wait 1 us
info	string	-	Prints string during simulation in Modelsim console	info Frame number 1
frame	data	-	Frame data to send	frame 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
crc	data	-	(Optional) CRC Data if a wrong CRC should be send. If not given the CRC will be calculated automatically	crc 01020304
error	string	-	(Optional) Specify which error to generate (RX_ERR, RX_DV)	error RX_ERR

Example Frame File

Example Frame files with predefined packet can be found in the Simulation Fodler of the EDA VHDL project.

at      1 us

info    Correct packet
frame   72 C1 14 7F 35 BC F9 EB 2C F6 
wait    3 us

info    Wrong CRC
frame   09 9D 7A 94 84 E0 48 BD 5A 54 DF F2 
crc     435E14A3
wait    3 us

info    Frame Error RX_ERR
error   RX_err
frame   35 26 9B 14 BB CC 0A D0 76 
wait    3 us

info    Frame Valid RX_DV
error   RX_DV
frame   53 96 2A 41 8C 18 41 87 B5 96 61 
wait    3 us

info    bonjour request fpga01.local
frame   01 00 5E 00 00 FB       # destination MAC address
        00 23 32 B1 21 52       # source MAC address
        08 00                   # IP Ethertype
           45 00 00 3A
           5F 11 00 00
           FF 11 DC 98          # TTL, protocol:UDP, checksum
           99 6D 05 A0          # source IP address
           E0 00 00 FB          # destination IP address
              14 E9 14 E9       # source and dest. UDP ports
              00 26 10 F0       # length, checksum
                 00 00 00 00 00 01 00 00 00 00 00 00 06 66 70 67
                 61 30 31 05 6C 6F 63 61 6C 00 00 01 00 01
wait    20 us

info    Echo 2 192.168.111.0
frame   E4 AF A1 39 02 00      # destination MAC address
        A0 A1 A2 A3 A4 A5      # source MAC address
        08 00                  # IP Ethertype
           45 00 00 2A
           00 00 40 00
           10 11 97 75         # TTL, protocol:UDP, checksum
           D0 D1 D2 D3         # source IP address
           C0 A8 6F 00         # destination IP address
              07 07 00 07      # source and dest. UDP ports
              00 16 F2 93      # length, checksu
                 48 65 6C 6C 6F 20 77 6F 6C 64 21 0D 0A 00
wait    8 us

MII Receiver

The MII Receiver can receive ethernet packets send over the MII interface and writes them in *[Number].eth file. Each frame is stored in one file, to avoid filename conflicts, on each file a continuous number is added to the filename. the bloc itself doesn't interpret the output, it only separates the Ethernet CRC from the data.

MII Receiver Output Commands

Command	Description	Example
at	Absolute simulation time the frame was received	at 7996 ns
info	Continuous frame number since beginning of simulation	info frame 1
frame	Frame data received	frame 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
crc	CRC Data of the received frame	crc A6E55D6E

Example output file

at      7996 ns
info    frame 1
frame   A0 A1 A2 A3 A4 A5 E4 AF A1 39 02 01 08 00 45 00
        00 00 00 2A 00 00 40 00 10 11 97 74 C0 A8 6F 01
        D0 D1 D2 D3 00 07 07 07 00 16 AC 73 48 65 6C 6C
        6F 20 77 6F 6C 64 64 21 0D 0A 00 00 00 00 00 00
        6C 64 21 20 48 65 6C 6C 4F 20 77 6F 72 6C 
crc     A6E55D6E