RE: [lwip-users] Problem with use DHCP and IP fixed

[Andrew Foster]

Diego,

I apologize. I should have dug a little deeper into the stack. The files 
I was referencing were an abstraction layer added by my silicon 
manufacturer. If you are curious how they implemented the functionality 
you can download the Stellaris family SDK from Luminary. 

Sorry for the confusion.

Andrew

-----Original Message-----
From: Diecol [mailto:address@hidden 
Sent: Tuesday, December 21, 2010 09:06
To: address@hidden
Subject: RE: [lwip-users] Problem with use DHCP and IP fixed


Thanks Andrew, 

But I'm using the lwip 1.4 version, this one don't have the lwiplib.h 
file
;(

I dont know what to do anymore..
I remember that with uIP I didnt #Define the DHCP!
I used to use like that in my .h:
#ifdef UIP_DHCP_on
  static int DHCP_ON = 1;
#else
  static int DHCP_ON = 0;
#endif

And in the code I just changed the variable..
DHCP_ON = 1; or DHCP_ON = 0;
and restart the uIP!

But in this case (lwip), if I create the DHCP variable like that:  
static int DHCP_ON = 1;
I don't know why, but I can't change it in code.
When I try to do like this: DHCP_ON = 1; appear this msg:
lvalue required as left operand of assigment ;/

I already try a lot of things, Im not having any more ideas.. 
anyone?

Thanks..

Regards

Diego


 



Andrew Foster-3 wrote:
> 
> Diecol,
> 
> If I'm not mistaken you will need to leave both:
> 
>   #define LWIP_DHCP  1
>   #define LWIP_UDP   1
> 
> This will allow you to make a runtime decision on what IP mode the 
user 
> has enabled. Keep in mind, the underlying protocol for receiving DHCP 
> packets is handled by the UDP portion of the lwIP stack (or at least 
> that is the way I remember it). 
> 
> As for configuring your interface at runtime, look into lwiplib.h. It 
> contains the structure, definitions and prototypes to configure your 
> network interface for both modes.
> 
> Once you have assigned the proper parameters to the structure, you can 

> call lwIPLib_Init(lwIPLib_IPInfo_t *pInitParams).
> 
> If you need to reconfigure call:
> lwIPLib_NetworkConfigChange(
>  unsigned long ulIPAddr,  // the new IP address to be used (static)
>  unsigned long ulNetMask, // the new network mask to be used (static)
>  unsigned long ulGWAddr,  // the new Gateway address to be used 
(static)
>  unsigned long ulIPMode)  // the IP Address Mode
> 
> Hope this helps,
> 
> Andrew 
> 
> 
> -----Original Message-----
> From: Diecol [mailto:address@hidden 
> Sent: Monday, December 20, 2010 13:11
> To: address@hidden
> Subject: [lwip-users] Problem with use DHCP and IP fixed
> 
> 
> Hello there, 
> 
> I'm working with lwip on at91sam9260 board and I'm using Eclipse 
> platform.
> well, 
> 
> When I set at lwipopts.h like this:
>               #define LWIP_DHCP  1
>               #define LWIP_UDP    1
> DHCP works fine..
> And when I set like this:
>               #define LWIP_DHCP  0
>               #define LWIP_UDP    0
> My Ip fixed works fine too..
> 
> But in my code, users can changed from ip fixed to dhcp on and 
> contrariwise!
> 
> When I used uIP protocol, I just did like this:
> 
> uip_ipaddr_t ipaddr;
> uip_ipaddr(ipaddr, 0, 0, 0, 0);
> uip_sethostaddr(ipaddr);
> uip_ipaddr(ipaddr, 0, 0, 0, 0);
> uip_setdraddr(ipaddr);
> uip_ipaddr(ipaddr, 0, 0, 0, 0);
> uip_setnetmask(ipaddr);
> uip_setethaddr(MacAddress);
> dhcpc_init(MacAddress.addr, 6);
> uip_restart();
> 
> And It worked..
> But now, I needed to change to lwip and when I try to change the
> configuration It didnt work!
> 
> Someone has any idea?
> 
> Thanks
> 
> Regards
> 
> Oliveira, Diego
> 
> -- 
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> 
> 
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