Mikroelektronika MIKROE-742 데이터 시트

386

- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 6

Ethernet module has to be initialized. See Spi_Ethernet_Init.

Spi_Ethernet_Disable(Spi_Ethernet_CRC or Spi_Ethernet_UNICAST);
// disable CRC checking and Unicast traffic

function Spi_Ethernet_doPacket(): byte;

- 

0

- upon successful packet processing (zero packets received or received 

packet processed successfully). 

- 

1

- upon reception error or receive buffer corruption. 

ENC28J60

controller 

needs to be restarted. 

- 

2

- received packet was not sent to us (not our IP, nor IP broadcast address). 

- 

3

- received IP packet was not IPv4. 

- 

4

- received packet was of type unknown to the library. 

This is MAC module routine. It processes next received packet if such exists. Pack-
ets are processed in the following manner:

ARP & ICMP requests are replied automatically. 
upon TCP request the Spi_Ethernet_UserTCP function is called for further
processing. 
upon UDP request the Spi_Ethernet_UserUDP function is called for further
processing. 
Note: Spi_Ethernet_doPacket must be called as often as possible in user's code.

Ethernet module has to be initialized. See Spi_Ethernet_Init.

while TRUE do

Spi_Ethernet_doPacket(); // process received packets