W6100 datasheet(121/149 Pages) WIZNET

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W6100 – Hardwired Dual TCP/IP Stack Controller

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6.6.3 ARP6 (ND, Neighbor Discovery)

SLCR[ARP6] transmits ICMPv6 NS (Neighbor Solicitation) packet to destination IP address

specified by SLDIP6R and it is similar to ARP-process. If NA (Neighbor Advertisement) is

received from destination, SLIR[ARP6] is set and destination hardware address is saved in

SLDHAR. If there is no response until the retransmission time, SLIR[TOUT] is set.

Refer to 6.7 Retransmission.

 Configuration

Configure retransmission time, ARP6 & TOUT interrupt mask and destination IP address.

{

START :

/* set SOCKET-less Retransmission Timer, 100ms(0x03E8) (Unit 100us) */

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

/* set SOCKET-less Retransmission Counter, 5 */

//SLRCR = 0x05;

/* set Interrupt Mask Bit */

//SLIMR[ARP6] = ‘1’; /* ARP6 Interrupt Mask Bit */

//SLIMR[TOUT] = ‘1’; /* TIMEOUT Interrupt Mask Bit */

/* set Target IP Address, FE80::1D0:AABB:CCDD */

SLDIP6R[0:15] = { 0xFE, 0x80, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00,

0x13, 0x22, 0x33, 0xFF, 0xFE, 0xAA, 0xBB, 0xCC };

}

 SOCKET-less Command

SLCR[ARP6] command transmits NS packet

{

SLCR[ARP6] = ‘1’; /* set ARP6 Command */

while(SLCR != 0x00) ; /* Wait until ARP6 Command is completed*/

}

 Response?

If there is NA packet from the destination, SLIR[ARP6] is set.

{

/* check ND Interrupt */

W6100 Datasheet(PDF) 121 Page - WIZnet Co., Ltd