W6100 datasheet(113/149 Pages) WIZNET

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W6100 – Hardwired Dual TCP/IP Stack Controller

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dest_ip[0:15] = destination_address[2:17];

/* read UDP DATA */

goto 6.2.1 TCP SERVER: Receiving Process with get_size = data_size;

}

 Sending DATA? / Sending Process

Data to send must not exceed SOCKET n TX buffer free size. If data size is larger than MSS,

HOST must split the lager data into multiple MSS units.

MSS of IPRAW6 mode cannot be larger than 1460, MSS of IPRAW mode cannot be larger than

1480.

IPRAW4 Mode :

{

/* set Destination IP Address, 192.168.0.11 */

Sn_DIPR[0:3] = {0xC0, 0xA8, 0x00, 0x0B};

goto 6.2.1 TCP SERVER: Sending Process;

}

IPRAW6 Mode :

{

/* set destination IP address, FE80::10D:FC:34A:EF90 */

Sn_DIP6R[0:15] = {0xFE, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00

0x01, 0x0D, 0x00, 0xFC, 0x03, 0x4A, 0xEF, 0x90};

goto 6.2.1 TCP SERVER: Sending Process;

}

 Complete sending? / Timeout?

ARP/ND-process is performed before first DATA packet is sent to by Sn_CR[SEND] or

Sn_CR[SEND6] or before DATA packet is sent to different destination from the previous

destination.

In ARP/ND-process, Sn_IR[TIMEOUT] may occur and the corresponding DATA packet is discarded.

Since IPRAW4 or IPRAW6 supports 1:N communication like as UDP, SOCKET n doesn’t close even

if Sn_IR[TIMEOUT] occurs (Refer to 0

Retransmission).

{

/* check TIMEOUT Interrupt */

W6100 Datasheet(PDF) 113 Page - WIZnet Co., Ltd