Re: [lwip-users] etharp_tmr(), ip_reass_tmr()...

[Adib Taraben]

Hello Mats,

those functions might be called indirectly. All what I need is in the 
main-loop:

// poll ethernet
cs8900if_service(&myethif);             // AX88796 driver (polling mode)

// poll ethernet slow timer every 250ms
if(core_get_tick() > (eth_tick + 2500))
{
        tcp_tmr();
        eth_tick += 2500;
}

This code polls the Ethernet chip and handles accordingly via call-back 
functions.
Periodically tcp_tmr() is called to clean unused blocks etc.. You might 
look where this function is called ....

Adib.
---


Mats Randgaard wrote:
> In our project we use lwIP to send UDP packets, and lwIP also handle 
> ARP, ICMP, IP fragmentation... All example code and documentation I have 
> read include a timer in the projects, but I have tested our design 
> without timer, and it works fine. Do I have to include a timer in the 
> project?
>
> I have read that etharp_tmr() and ip_reass_tmr() must be called. Our 
> system is working fine without, but will it crash later because we don't 
> call the timer functions? Do we have to call them or do the Xilinx 
> adapter functions call them? I have tried to read the source code for 
> lwIP, and it seems like the timer functions are called only if NO_SYS = 
> 0. Am I right? Are there other timer functions we have to call?
>
> We use lwIP 1.3.0 on a MicroBlaze processor without OS on a Spartan 3A 
> DSP 1800 FPGA.
>
>
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