W5100S datasheet(82/110 Pages) WIZNET

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W5100S Datasheet Version1.2.5

If there is no response from Peer against of transmitted ARP Request Packet within the

Retransmission Time, TIMEOUT Interrupt is occurred. (Ref 4.8.1 ARP & PING Retransmission)

{

/* check TIMEOUT Interrupt */

if(SLIR[TIMEOUT] == 1)

{

/* clear Interrupt */

SLIR[TIMEOUT] = ‘1’;

goto END;

}

else goto Response;

}

 SUCCESS

If ARP Reply is received, Peer MAC Address is stored in SLPHAR.

{

/* get Destination MAC Address */

destination_mac[0:5] = SLPHAR[0:5];

goto END;

}

4.7.2 PING Command (SLCR [PING] = ‘1’)

PING Request Packet is transmitted by SLCR [PING] Command. Before SLCR [PING] Command,

SLPIPR, PINGSEQR and PINGIDR must be set. If PING Reply is received from Peer, SLIR [PING] is

set to ‘1’ and Peer MAC Address is written in SLPHAR. If there is no response against of PING

Request within SOCKET-less Retransmission Time, SLIR [TIMEOUT] is set to ‘1’. (Ref 4.8.1 ARP

& PING Retransmission)

 Configuration

Configure SOCKET-less Retransmission Time and PING Interrupt Mask Bit and Destination Peer

IP Address.

{

START :

/* set SOCKET-less Retransmission Time, 100ms(0x03E8) (The unit is 100us) */

SLRTR[0:1] ={ 0x03, 0xE8};

W5100S Datasheet(PDF) 82 Page - WIZnet Co., Ltd