W5300 datasheet(99/128 Pages) WIZNET

Part #	W5300

Description	High-Performance Internet Connectivity Solution

PDF	128 Pages

Scroll/Zoom	100%

Manufacturer	WIZNET [WIZnet Co., Ltd]

Direct Link	https://www.wiznet.io/ko/Product/

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99 / 128 page

for (i = 0; i < write_cnt; i++)

{

Sn_TX_FIFOR = data_buf[i]; /* data_buf is array of 16bit */

}

/* check previous SEND command completion */

if (is first send ?) ; /* skip check Sn_IR(SENDOK) */

else

{

while(Sn_IR(SENDOK)=

=‘0’)

{

if(Sn_SSR

SOCK_CLOSED)

goto

CLOSED

state;

check

connection

establishment */

}

Sn_IR(SENDOK) = ‘1’; /* clear previous interrupt of SEND completion */

}

/* sets transmission data size to Sn_TX_WRSR */

Sn_TX_WRSR = send_size;

/* set SEND command */

Sn_CR = SEND;

}



ESTABLISHED : Received FIN?

It checks if disconnect-request(FIN packet) is received or not. It can be checked as below.

First method :

{

f (Sn_IR(DISCON) == ‘1’) Sn_IR(DISCON)=‘1’; goto CLOSED stage;

/* In this case, if the interrupt of SOCKETn is activated, interrupt occurs. Refer to IR, IMR

Sn_IMR and Sn_IR. */

}

Second method :

{

if (Sn_SSR == SOCK_CLOSE_WAIT) goto CLOSED stage;

}

W5300 Datasheet(PDF) 99 Page - WIZnet Co., Ltd