W5100S datasheet(71/110 Pages) WIZNET

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W5100S Datasheet Version1.2.5

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/* set Broadcast Address, 255.255.255.255 */

Sn_DIPR[0:3] = {0xFF, 0xFF, 0xFF, 0xFF};

/* set Destination PORT Number, 5000(0x1388) */

Sn_PORTR[0:1] = {0x13,0x88};

goto 4.3.1 TCP Server : Sending Process;

}

Subnet Broadcasting : Assume SIPR = “192.168.0.10” & SUBR = “255.255.255.0”

{

/* set Broadcast Address, 192.168.0.255 */

Sn_DIPR[0:3] = {0xC0, 0xA8, 0x00, 0xFF};

/* set Destination PORT Number, 5000(0x1388) */

Sn_PORTR[0:1] = {0x13,0x88};

goto 4.3.1TCP Server : Sending Process;

}

4.4.3 UDP Multicast

UDP Multicast is the last Communication Method in which sender is one and receiver is a group.

The Multicast-Group Address Range is 224.0.0.0 ~ 239.255.255.255 (Ref IANA_Multicast Address)

and the corresponding MAC Address is 01:00:5E:00:00:00 ~ 01:00:5E:FF:FF:FF . The Lower 23

bits of MAC Address has the same Address with the Multicast-Group Address. (Ref rfc1112)

 OPEN

Before Sn_CR [OPEN] Command, Multicast-Group Information and Sn_MR [MULTI] must be set.

IGMP (Internet Group Management Protocol) JOIN message is transmitted by Sn_CR [OPEN]

Command.

IGMP version is set as version 1 or version 2 by Sn_MR [MS].

{

START :

/* set Multicast-Group MAC Address, 01:00:5E:00:00:64 */

Sn_DHAR[0:5] = {0x01, 0x00, 0x5E, 0x00, 0x00, 0x64};

/* set Multicast-Group IP Address, 224.0.0.100 */

W5100S Datasheet(PDF) 71 Page - WIZnet Co., Ltd