Data Sheet

iEthernet

W5200

/* sets IP raw mode */

Sn_MR = 0x03;

/* sets OPEN command */

Sn_CR = OPEN;

/* wait until Sn_SR is changed to SOCK_IPRAW */

if (Sn_SR != SOCK_IPRAW) Sn_CR = CLOSE; goto START;

}

Check received data

Refer to the “5.2.2.1 Unicast & Broadcast.”

Receiving process

Process the IPRAW data which is received in internal RX memory. The structure of

received IPRAW data is as below.

Figure 15 The receive IPRAW data Format

The IPRAW data consists 6 bytes PACKET-INFO and DATA packet. The PACKET-INFO

contains information about the transmitter (IP address) and the length of the DATA-

packet. The data reception of IPRAW is the same as UDP data reception except

processing the port number of the transmitter in UDP PACKET-INFO. Refer to the

“5.2.2.1 Unicast & Broadcast.” If the transmitted DATA size is larger than RX memory

free size of Socket n , user cannot receive that DATA and also cannot receive

fragmented DATA.

Checks send data / Sending process

The size of DATA which user wants to transmit cannot be larger than Internal TX

memory and default MTU. The transmission of IPRAW data is the same as transmission

of UDP data except setting ‘Destination port number’. Refer to the “5.2.2.1 Unicast &

Broadcast.”

Complete sending / Timeout

Same as UDP, please refer to the “5.2.2 UDP.”

Check finished / SOCKET closed

Same as UDP, please refer to the “5.2.2 UDP.”