Wiz550io no socket control

Question

I seemed to have lost almost all control over the socket registers. I cannot set the IP address or destination port number on any of the sockets. I also see no status change when I send the “OPEN” command. I can change the socket mode and source port number. I have tried altering other sockets with the same result. I can read and write other registers freely (like common register or even transmit and receive memory on any of the sockets). I had it working before but now I’m completely blocked. I’ve been rewriting code for days, checking wiring, tried multiple Wiz550io modules (fresh out of the box) . . . No luck! What could possibly be preventing me from changing socket destination parameters yet still allow me to change practically everything else? I’m using an ATmega324A chip. Code is attached. I suspect there’s a simple explanation that I just can’t see because I’m looking to close at the wrong spot. src.zip (9.37 KB)

hjjeon0608 · Answer

Hi, Destination port and IP can be read after TCP connection is established. First, try to connect and then check registers. Thanks.

outlaw314 · Answer

Thank you. Now I understand. So I’m able to see registers now but still can’t seem to connect like I did before. I’m getting a timeout flag on the socket. My firewall shows no packets coming from the switch. I suspect the issue is with something other than the Wiz550io now, but in case I’m missing something obvious again, here are the settings I’m using. Subnet mask: 255.255.255.0 Gateway IP: 192.168.2.1 Source IP: 192.168.2.3 Socket 0 TCP IP address: 192.168.2.2 Source/Destination port: 31415 Everything else uses default values set by hardware reset.

outlaw314 · Answer

Ignore that last post. I just connected. I suspect I tried to connect too soon after giving the “open” command. Thanks again.