Mikroelektronika MIKROE-742 데이터 시트

390

- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 6

procedure Spi_Ethernet_getBytes(ptr : ^byte; addr : word; n :
byte);

Nothing.

This is MAC module routine. It fetches equested number of bytes from

ENC28J60

RAM starting from given address. If value of 

0xFFFF

is passed as the

address parameter, the reading will start from current 

ENC28J60

read pointer

(

ERDPT

) location.

Parameters:

- 

ptr

: buffer for storing bytes read from ENC28J60 RAM. 

- 

addr

: ENC28J60 RAM start address. Valid values: 0..8192. 

- 

n

: number of bytes to be read. 

Ethernet module has to be initialized. See Spi_Ethernet_Init.

buffer : 

array[16] of byte;

...
Spi_Ethernet_getBytes(buffer, 0x100, 16); // read 16 bytes,

starting from address 0x100

function Spi_Ethernet_UserTCP(remoteHost : ^byte; remotePort :
word; localPort : word; reqLength : word) : word;

- 

0

- there should not be a reply to the request. 

- Length of TCP/HTTP reply data field - otherwise. 

This is TCP module routine. It is internally called by the library. The user accesses to
the TCP/HTTP 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 TCP/HTTP reply, or 0 if there is nothing
to transmit. If there is no need to reply to the TCP/HTTP requests, just define this
function with return(0) as a single statement. 

Parameters:

- 

remoteHost

: client's IP address. 

- 

remotePort

: client's TCP port. 

- 

localPort

: port to which the request is sent. 

- 

reqLength

: TCP/HTTP 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.