Mikroelektronika MIKROE-742 데이터 시트

This code shows how to use the AVR mini Ethernet library : 

- the board will reply to ARP & ICMP echo requests 
- the board will reply to UDP requests on any port : 

returns the request in upper char with a header made of remote host IP & port number 

- the board will reply to HTTP requests on port 80, GET method with pathnames : 

/ will return the HTML main page 
/s will return board status as text string 
/t0 ... /t7 will toggle P3.b0 to P3.b7 bit and return HTML main page 
all other requests return also HTML main page. 

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- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 6

Ethernet module has to be initialized. See Spi_Ethernet_Init.

This function is internally called by the library and should not be called by the
user's code.

function Spi_Ethernet_UserUDP(remoteHost : ^byte; remotePort :
word; destPort : word; reqLength : word) : word;

- 

0

- there should not be a reply to the request. 

- Length of UDP reply data field - otherwise. 

This is UDP module routine. It is internally called by the library. The user
accesses to the UDP request by using some of the Spi_Ethernet_get routines.
The user puts data in the transmit buffer by using some of the Spi_Ethernet_put
routines. The function must return the length in bytes of the UDP reply, or 0 if
nothing to transmit. If you don't need to reply to the UDP requests, just define
this function with a return(0) as single statement. 

Parameters:

- 

remoteHost

: client's IP address. 

- 

remotePort

: client's port. 

- 

destPort

: port to which the request is sent. 

- 

reqLength

: UDP request data field length. 

Note: The function source code is provided with appropriate example projects.
The code should be adjusted by the user to achieve desired reply.

Ethernet module has to be initialized. See Spi_Ethernet_Init.

This function is internally called by the library and should not be called by the
user's code.