W5100 datasheet(44/72 Pages) WIZNET

Part #	W5100

Description	Single-chip Internet-enabled 10/100 Ethernet Controller

PDF	72 Pages

Scroll/Zoom	100%

Manufacturer	WIZNET [WIZnet Co., Ltd]

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

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44 / 72 page

/* sets OPEN command */

Sn_CR = OPEN;

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

}

◼

LISTEN

Set the LISTEN command to the command register. The related register is below.

Socket n Command Register (Sn_CR)

{

/* listen socket */

Sn_CR = LISTEN;

if (Sn_SR != SOCK_LISTEN) Sn_CR = CLOSE; goto START; // check socket status

}

◼

ESTABLISHED ?

If connection request is received from remote peer (the status of SOCK_SYNRECV), W5100

sends ACK packet and changes to SOCK_ESTABLISHED status. This status can be checked

as below.

First method :

{

If (Sn_IR(CON bit) == ‘1’) goto ESTABLISHED stage;

/* In this case, if the interrupt of Socket n is activated, interrupt occurs. Refer to

Interrupt Register(IR), Interrupt Mask Register (IMR) and Socket n Interrupt Register

(Sn_IR). */

}

Second method :

{

If (Sn_SR == SOCK_ESTABLISHED) goto ESTABLISHED stage;

}

As connection is established, data transmission and receipt can be performed.

W5100 Datasheet(PDF) 44 Page - WIZnet Co., Ltd