MACraw & IGMP

Question

Hi I open Socket 0 in MACRAW mode & socket 1 in Multicast mode but i cant receive any packet on my Multicast socket how can i do that???

lawrence · Answer

Hi, reza. W5200 supports multicast but needs setting some registers also. I don’t know if you follow these steps or not. To use multicast, you should assign the group you will communicate. Before opening a socket, Set Multi-group hardware address, Multi-group IP address, Multi-group port number, UDP and Multicast Enable with Sn_DHAR, Sn_DIPR, Sn_DPORT, Sn_PORT, Sn_MR. You can find more details with W5200 datasheet. wiznethome.cafe24.com/wp-content … _V130E.pdf If it is not fix your problem, please upload your code or more details about it. Thank you. Lawrence

reza · Answer

Hi, Lawrence. I had configured my multicast socket (on Socket 1) and it worked perfectly. but when i configured MACRAW mode on socket 0 , and open it, i cant receive any data on multicast socket (my Sn_RX_RSR on socket 1 is always 0). whats the problem !!!? W5200 can not work with two socket on MACRAW & Multicast modes Simultaneously !!!??? thanks for your attention.

lawrence · Answer

Hello, reza First, It works to open Socket 0 as MACRAW and Socket 1 as Multicast Socket. But the point is Sn_MR[7:0]. [quote]Sn_MR[5] set enable or disable Multicast Blocking (this bit works on only MACRAW mode [3:0]=‘0100’) 0: disable Multicast Blocking 1: enable Multicast Blocking[/quote] So, make sure if your S0_MR[5] is 0 or 1 then If it is set, Reset this bit and try again. Thank you, Lawrence