Mikroelektronika MIKROE-738 Datenbogen

mikroC PRO for PIC32

MikroElektronika

477

SPI_Ethernet_24j600_UserUDP

unsigned  int  SPI_Ethernet_24j600_UserUDP(unsigned  char  *remoteHost, 

unsigned  int  remotePort,  unsigned  int  destPort,  unsigned  int  reqLength, 

TEthj600PktFlags *flags);

Description 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_24j600_get routines. The user puts data in the transmit buffer by 

using some of the SPI_Ethernet_24j600_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. 

- 

localPort

: port to which the request is sent. 

- 

reqLength

: UDP request data field length. 

- 

flags

: structure consisted of two bit fields :  

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typedef struct {

  unsigned canCloseTCP: 1;  // flag which closes TCP socket (not relevant 

  unsigned isBroadcast: 1;  // flag which denotes that the IP package has 

} TEthj600PktFlags;

- 

0

 - there should not be a reply to the request. 

- Length of UDP reply data field - otherwise. 

Ethernet module has to be initialized. See SPI_Ethernet_24j600_Init.

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

The function source code is provided with appropriate example projects. The code should be adjusted 

by the user to achieve desired reply.

SPI_Ethernet_24j600_getIpAddress

unsigned char * SPI_Ethernet_24j600_getIpAddress();

Description This  routine  should  be  used  when  DHCP  server  is  present  on  the  network  to  fetch  assigned  IP 

address.

Parameters None.
Returns

Pointer to the global variable holding IP address.

Ethernet module has to be initialized. See SPI_Ethernet_24j600_Init.

unsigned char ipAddr[4];  // user IP address buffer

... 

memcpy(ipAddr, SPI_Ethernet_24j600_getIpAddress(), 4); // fetch IP address

User should always copy the IP address from the RAM location returned by this routine into it’s own IP 

address buffer. These locations should not be altered by the user in any case!