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W5100 Datasheet(PDF) 56 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) 56 Page - WIZnet Co., Ltd

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© Copyright 2009-2011 WIZnet Co., Inc. All rights reserved.
55
/* copy upper_size bytes of source_addr to get_start_address */
upper_size = (gSn_TX_MASK + 1) – get_offset;
memcpy(source_addr, get_start_address, upper_size);
/* update source_addr*/
source_addr += upper_size;
/* copy left_size bytes of source_addr to gSn_TX_BASE */
left_size = send_size – upper_size;
memcpy(source_addr, gSn_TX_BASE, left_size);
}
else
{
/* copy send_size bytes of source_addr to get_start_address */
memcpy(source_addr, get_start_address, send_size);
}
/* increase Sn_TX_WR as length of send_size */
Sn_TX_WR += send_size;
/* set SEND command */
Sn_CR = SEND;
}
◼
Complete Sending?
The sending completion should be checked after SEND command.
{
If (Sn_CR == 0x00) transmission is completed.
}
◼
Timeout
Timeout occurs if remote peer does not exist or data transmission is not normally
processed. It can be checked as below.
{
If (Sn_IR(TIMEOUT bit) == ‘1’) goto next 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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