Mikroelektronika MIKROE-350 Fiche De Données

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. 

Main program code: 

include eth_enc28j60_utils 'this is where you should write implemen-
tation for UDP and HTTP
'***********************************
'* RAM variables
'*
'***********************************
dim myMacAddr   as byte[6]     ' my MAC address

myIpAddr    

as byte[4]     ' my IP address

gwIpAddr    

as byte[4]     ' gateway (router) IP address

ipMask      

as byte[4]     ' network mask (for example :

255.255.255.0)

dnsIpAddr   as byte[4]     ' DNS server IP address

' mE ehternet NIC pinout

SPI_Ethernet_Rst 

as sbit at PORTB.B4

SPI_Ethernet_CS  

as sbit at PORTB.B5

SPI_Ethernet_Rst_Direction 

as sbit at DDRB.B4

SPI_Ethernet_CS_Direction  

as sbit at DDRB.B5

' end ethernet NIC definitions

dim i as word

main:

' set PORTC as input

DDRC = 0
' set PORTD as output
DDRD = 0xFF

httpCounter = 0

381

- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 6