W5500 Multicast 관련 질문
Ethernet Chips
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RE: W5500 Multicast 관련 질문
by irina WIZnet ·
샘플코드라면 어떤걸 받으신건가요?
송신처리 구문이 끝나기전이라는 건, Sn_CR = Send 를 내리기전에 수신인터럽터가 들어왔다는건가요?
join packet을 확인하실 때 어떤 방식으로 확인하셨나요?
join packet은 local 기기들로 broadcast 되기 때문에 pc 가 연결된 허브에 디바이스를 연결하시면 pc에서 wireshark로 확인이 가능합니다.
udp multicast group mac 주소는 생성방법이 따로 존재합니다.
broadcast의 mac 주소가 ff:ff:ff:ff:ff:ff 인것 처럼
multicast의 mac 주소는 01:00:5e: ( 0bit + multicast IP address의 하위 23bits ) 입니다.
multicast 통신에 대한 자세한 내용은 아래 자료를 참고하시면 도움이 되실겁니다.
https://forum.wiznet.io/forum/legacyFile.asp?path=nyQQ5ZJcs4dAt11JksePXPUfVTn.pdf