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

[Diecol]

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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