W6100 datasheet(111/149 Pages) WIZNET

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W6100 – Hardwired Dual TCP/IP Stack Controller

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if(Sn_SR != SOCK_IPRAW6) goto START;

}

IPRAW6 Mode :

{

START :

Sn_PNR = protocol_num;

/* set Protocol Number(Next Header) */

Sn_MR[3:0] = ‘1001’;

/* set IPRAW6 Mode */

Sn_CR[OPEN] = ‘1’;

/* set OPEN Command */

while(Sn_CR != 0x00); /* wait until OPEN Command is cleared */

/* check SOCKET for IPRAW Mode */

if(Sn_SR != SOCK_IPRAW) goto START;

}

 Received DATA?

Refer to 6.2.1 TCP SERVER: Received DATA?

 Receiving Process

IPRAW4/IPRAW6 mode receives IP DATA packets from one or more sender. To distinguish each

sender, DATA packet is stored in the SOCKET n RX buffer block with preceding ‘PACKET INFO’

as shown in Figure 27 or Figure 28. ‘PACKET INFO’ has different formats according to

IPRAW4/IPRAW6 mode as shown in Table 8 and Table 9.

If the received DATA is larger than SOCKET n RX buffer free size, it is discarded. Thus, the HOST

must be read in unit of Figure 27 or Figure 28.

Figure 27 Received DATA in IPRAW4 Mode SOCKET RX Buffer Block

Table 8 parameters of ‘PACKET INFO’ in IPRAW4 Mode

PACKET INFO

Description

DATA Length

The length of *IPRAW DATA

Destination IPv4 Address

Destination IPv4 Address (4 Byte)

W6100 Datasheet(PDF) 111 Page - WIZnet Co., Ltd