Mikroelektronika MIKROE-350 Fiche De Données

374

- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 6

sub function Spi_Ethernet_doPacket() as 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.
Packets 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. 

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

...
Spi_Ethernet_doPacket() ' process received packets
...