Re: [lwip-users] tcp_connect doesn't start the callback function

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Marianovich, Andre wrote:
> Ok, now I took a design from xilinx with all the necessary interrupt
> stuff, etc. and I think it should work now, but it doesn't. It's all the
> same like before. The tcp_connect function doesn't seem to call the
> callback function, and the transfer_data function will be called several
> times but than it's sticking (I added a simple print command to check,
> to where it runs).
>    
Have you tried setting up an error callback function (by calling 
tcp_err(pcb, your_err_fn) before calling tcp_connect)? Also, if you can 
read printfs from your target, you might want to enable debug output for 
TCP to see what's going on there.

Oh, and from your first example, it's not clear if the timer functions 
are getting called (at the correct interval). Especially tcp_tmr(), 
which is responsible for retransmission and connect-timeout (the 
error-callback is called if connect fails, not the connected-callback!).

Simon