W5100 WIZnet, W5100 Datasheet - Page 53

• Manufacturer Part Number: W5100
• Description: Ethernet ICs 3-IN-1 ENET CONTR TCP/IP+MAC+PHY
• Manufacturer: WIZnet

Specifications of W5100

• Rohs: yes
• Product: Ethernet Controllers
• Data Rate: 10 Mb/s, 100 Mb/s
• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 3 V
• Maximum Operating Temperature: + 80 C
• Package / Case: LQFP-80
• Ethernet Connection Type: 10Base-T, 100Base-TX
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Standard Supported: 802.3, 802.3u

© Copyright 2009-2010 WIZnet Co., Inc. All rights reserved.
/* if overflow socket RX memory */
if ( (get_offset + header_size) > (gSn_RX_MASK + 1) )
{
}
else
{
}
/* update get_start_address */
get_start_address = gSn_RX_BASE + get_offset;
/* save remote peer information & received data size */
peer_ip = header[0 to 3];
peer_port = header[4 to 5];
get_size = header[6 to 7];
/* if overflow socket RX memory */
if ( (get_offset + get_size) > (gSn_RX_MASK + 1) )
{
/* copy upper_size bytes of get_start_address to header_addr */
upper_size = (gSn_RX_MASK + 1) – get_offset;
memcpy(get_start_address, header_addr, upper_size);
/* update header_addr*/
header_addr += upper_size;
/* copy left_size bytes of gSn_RX_BASE to header_addr */
left_size = header_size – upper_size;
memcpy(gSn_RX_BASE, header_addr, left_size);
/* update get_offset */
get_offset = left_size;
/* copy header_size bytes of get_start_address to header_addr */
memcpy(get_start_address, header_addr, header_size);
/* update get_offset */
get_offset += header_size;
/* copy upper_size bytes of get_start_address to destination_addr */
upper_size = (gSn_RX_MASK + 1) – get_offset;
memcpy(get_start_address, destination_addr, upper_size);
/* update destination_addr*/
destination_addr += upper_size;
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