W6100 datasheet(101/149 Pages) WIZNET

101 / 149 page

W6100 – Hardwired Dual TCP/IP Stack Controller

101/149

{

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

dest_port = (destination_address[18] << 8) + destination_address[19];

}

/* read UDP DATA */

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

}

 Send DATA? / Sending Process

Refer to 6.2.1 TCP SERVER: Send DATA? / Sending Process

UDP4 Mode

{

/* set destination IP address, 192.168.0.11 */

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

/* set destination PORT number, 5000(0x1388) */

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

goto 6.2.1 TCP SERVER: Sending Process with Sn_CR[SEND];

}

UDP6 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};

/* set destination PORT number, 5000(0x1388) */

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

goto 6.2.1 TCP SERVER: Sending Process with Sn_CR[SEND6];

}

 Complete Sending? / Timeout?

When HOST sends data to a destination at the beginning or a different destination, ARP process

is performed prior to transmitting DATA packet. In the ARP Process, if there is no response to

ARP request from peer within the whole retransmission time, Sn_IR[TIMEOUT] interrupt occurs.

Unlike TCP, UDP SOCKET does not close by Sn_IR[TIMEOUT] because it supports 1:N

communication.

Refer to 6.7 Retransmission.

W6100 Datasheet(PDF) 101 Page - WIZnet Co., Ltd