W5100 datasheet(53/72 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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53 / 72 page

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Received DATA?

It can be checked as below if data is received from remote peer.

First method :

{

if (Sn_RX_RSR != 0x0000) goto Receiving Process stage;

}

Second Method :

{

If (Sn_IR(RECV bit) == ‘1’) goto Receiving Process 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). */

}

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Receiving Process

Received data can be processed as below. In case of UDP, 8byte header is attached to

receiving data. The structure of the header is as below.

{

/* first, get the received size */

get_size = Sn_RX_RSR;

/* calculate offset address */

get_offset = Sn_RX_RD & gSn_RX_MASK;

/* calculate start address(physical address) */

get_start_address = gSn_RX_BASE + get_offset;

/* read head information (8 bytes) */

header_size = 8;

W5100 Datasheet(PDF) 53 Page - WIZnet Co., Ltd