W5500 unable to connect TCP server

Question

Hello, I am working with W5500, and want to operate it as TCP client. I set the following registers as follows, but my client is unable to join any server. Please review my commands, shall I set something different? Common register block 0000 04 00 C0A80001 FFFFFF00 9A98DC010203 C0A800CA 0000 FF 40 00 01 0FA0 07 00C8 AA Socket register block 0000 0C 01 00 1F 00 4B10 FFFFFFFFFFFF 0CA80020 Open socket 0001 0C 01 Check status 0003 08 00 = 0x13 Open as client 0001 0C 04 Check status 0003 08 00 = 0x15 after 30 s it changes 0x00, no connection to the server. My network settings: mask: 255.255.255.0 gateway: 192.168.0.1 What should I set different?

Sandor Banoczy · Answer

Update: w5500 send proper TCP messages in server mode, for client requests, (syn/ack) kép1146×107 9.14 KB while send mac broadcast instead of TCP SYN packet in client mode while try to join a server… kép (1)1129×268 12.5 KB The same setting I use for borh (expect tcp mode for sure) Strange… Did somebody had the same before?

Sandor Banoczy · Answer

OK solved. SW/HW resets were the problem, I guess. HW reset for at least ~100ms is necessary, continue it with SW reset, and do not modify basic memory settings (timing TOS TTL) just write the data as follows for common regs and S0… Default common register settings 0000 04 80 **SW reset 0001 04 C0A80001 FFFFFF00 9A98DC010203 C0A800CA **gateway, subnet, sIP 002e 04 88 **PHY Default socket_0 register settings for TCP 0000 0C 01 ** TCP mode 0004 0C 1388 **sPORT 000C 0C C0A80020 1388 **dIP, dPORT Open Socket 0001 0C 01 Check SOCKET 0 is in INIT STATE 0003 08 00 ?= 0x13 (SOCK_INIT) Send Connect request 0001 0C 04 Check SOCKET 0 if SOCK_SYNSENT 0003 08 00 ?= 0x17 (ESTABLISHED)