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W5100 Datasheet(PDF) 55 Page - WIZnet Co., Ltd

Part # W5100
Description  Single-chip Internet-enabled 10/100 Ethernet Controller
PDF  72 Pages
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Manufacturer  WIZNET [WIZnet Co., Ltd]
Direct Link  https://www.wiznet.io/ko/Product/
Logo WIZNET - WIZnet Co., Ltd

W5100 Datasheet(HTML) 55 Page - WIZnet Co., Ltd

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© Copyright 2009-2011 WIZnet Co., Inc. All rights reserved.
54
/* copy left_size bytes of gSn_RX_BASE to destination_addr */
left_size = get_size – upper_size;
memcpy(gSn_RX_BASE, destination_addr, left_size);
}
else
{
/* copy get_size bytes of get_start_address to destination_addr */
memcpy(get_start_address, destination_addr, get_size);
}
/* increase Sn_RX_RD as length of get_size+header_size */
Sn_RX_RD = Sn_RX_RD + get_size + header_size;
/* set RECV command */
Sn_CR = RECV;
}
◼
Send Data? / Sending Process
Data transmission process is as below.
{
/* first, get the free TX memory size */
FREESIZE:
get_free_size = Sn_TX_FSR;
if (get_free_size < send_size) goto FREESIZE;
/* Write the value of remote_ip, remote_port to the Socket n Destination IP Address
Register(Sn_DIPR), Socket n Destination Port Register(Sn_DPORT). */
Sn_DIPR = remote_ip;
Sn_DPORT = remote_port;
/* calculate offset address */
get_offset = Sn_TX_WR & gSn_TX_MASK;
/* calculate start address(physical address) */
get_start_address = gSn_TX_BASE + get_offset;
/* if overflow socket TX memory */
if ( (get_offset + send_size) > (gSn_TX_MASK + 1) )
{



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