NO DATA SEND IN UDP PACKET

Question

Hello everyone, I’m very much new to VHDL programming and as a part of my final year project I am required to use the W5500 LAN module to transmit data. To test my code I used socket zero and loaded data xFF and ran the program, but on the Wireshark, the UDP data received shows no data just the headers. I don’t understand why the data is not sent with the UDP/IP packet. The program I developed worked as follows, Loaded data into tx buffer selected mode of the socket opened the socket send the data is the order wrong? Should I load the data only after opening the socket?

irina · Answer

We recommend that you load data into the tx buffer after opening a socket use it. I think num1 should be done in the order between num3 and num4.

irina · Answer

I think I recommend to see you 4.4 UDP in as below link . docs.wiznet.io w5100s_ds_v127e.pdf 1492.54 KB Also, you should write the value in the SHAR( Mac address) .

Abraham George · Answer

I tried doing the process in the same order as mentioned in the pdf still the data is not being transferred only the headers I also tried changing the socket from 0 to 1, what could be the potential reasons for this ? UDP1920×1080 204 KB

Abraham George · Answer

Is just wanted to clarify a doubt I tried sending the data through the ethernet cable to another computer without changing my code. I received the UDP packet same as before with no data but how can the data still come to the computer when the hardware and IP address of the new computer is different ?

Abraham George · Answer

I just added a new block for clock and it is corrected

saran4589 · Answer

Thanks for the prompt reply, but where did you add the block for clock? In your VHDL code or while initializing the registers? Could you maybe give some more details?

Abraham George · Answer

I added the clock to the block which loaded data to the register

Gokul · Answer

Hi Saran, I’m new to VHDL and trying to send or receive data from FPGA using W5500 Module. I’m not sure how to start, any help would be highly appreciable…