Mikroelektronika MIKROE-724 データシート

492

mikoBasic PRO for dsPIC30/33 and PIC24

MikroElektronika

SPI_Ethernet_renewDHCP

sub function SPI_Ethernet_renewDHCP(dim tmax as byte) as byte 

Description This is DHCP module routine. It sends IP address lease time renewal request to DHCP server. 
Parameters - 

tmax

: time in seconds to wait for an reply. 

- 

1

 - upon success (lease time was renewed). 

- 

0

 - otherwise (renewal request timed out). 

Ethernet module has to be initialized. See SPI_Ethernet_Init.

while true 

  ...

  if(SPI_Ethernet_doDHCPLeaseTime() <> 0) then

    SPI_Ethernet_renewDHCP(5)  ‘ it’s time to renew the IP address lease, 

                 

None.

Library Example

This code shows how to use the Ethernet mini 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 RD0 to RD7 bit and return HTML main page 

 

 

- all other requests return also HTML main page. 

Main program code: 

program HTTP_Demo

‘ ***********************************

‘ *

  SPI_Ethernet_Rst as sbit at LATF0_bit

  SPI_Ethernet_CS  as sbit at LATF1_bit

  SPI_Ethernet_Rst_Direction as sbit at TRISF0_bit

  SPI_Ethernet_CS_Direction  as sbit at TRISF1_bit

dim myMacAddr   as byte[6]   ‘ my MAC address

    myIpAddr    as byte[4]   ‘ my IP address