W5100E01-AVR WIZnet, W5100E01-AVR Datasheet - Page 68

• Manufacturer Part Number: W5100E01-AVR
• Description: Development Boards & Kits - AVR W5100 EVAL BOARD BASED ON AVR
• Manufacturer: WIZnet

Specifications of W5100E01-AVR

• Rohs: yes
• Product: Development Boards
• Tool Is For Evaluation Of: ATMEGA128
• Core: AVR8
• Interface Type: LAN, RS-232
• Operating Supply Voltage: 5 V
• Data Bus Width: 8 bit

Since web_server() is TCP server program, it is built in the similar way as loopback_tcps() as explained in
Chapter
web_server() calls proc_http() that processes HTTP request message from web browser at
SOCK_ESTABLISHED of the http socket.
After calling function proc_http(), it waits until the HTTP response message to HTTP request from web
browser, and then calls disconnect() to close the http socket.
This socket close is called Active Close and, in the case, EVB B/D requests the close to the client first. For
your reference, Passive Close is where client requests disconnection first. The reason why web server
program supports Active Close is that EVB B/D supports the connection with other clients.
Declare & Initialize Local Variables
u_char * http_request = RX_BUF
SOCK_ESTABLISHED
SOCK_CLOSE_WAIT
Select Socket Status
3.2.6.1. Difference between web_server() and loopback_tcps() is in the data communication codes.
SOCK_CLOSED?
web_server()
getSn_SR()
?
?
N
N
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Y
Y
Y
socket(ch,SOCK_STREAM,port,flag)
Wait a connetion with a client
len = getSn_RX_RSR()
Select Recieved Size
Create a TCP Socket
<Fig 3.18: web_server()>
Close Socket
NBlisten(ch)
close(ch)
RETURN
len > 0
N
Y
http_proc(ch,http_request,len)
Process the HTTP Message
recv(ch,http_request,len)
Wait for sending the HTTP
Response completely
Receive the Data
Close Socket
close(ch)
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