Re: [lwip-users] Where is Read()Write() functions that I must overload?

[Noam weissman]

Hi,

 

Ethernetif or similar is just the low level driver connecting LwIP with your ETH or hardware.

 

As for writing data you have tcp_write function or similar.

 

You need to read LwIP documentation and get to understand it. LwIP can work in 3 different operation mode.

You can work with like BSD (unix like), Netcom or RAW. All this are different so it depends how you are going to use it

Also check the contribution collection …

 

BR,

Noam.

 

 

From: address@hidden [mailto:address@hidden On Behalf Of ???? ?????
Sent: Tuesday, June 17, 2014 7:46 AM
To: address@hidden
Subject: [lwip-users] Where is Read()Write() functions that I must overload?

 

Hello all.

I am trying to use TCP/IP through a lwIP for communicating with a RS-232 device. The problem is that I am the third day wander in the source code, and I can't find at all where is the Read()/Write() (or something like this) functions that I should overload to make the stack work.

In the ethernetif.c file I found the low_level_output() function. As the description says "This function should do the actual transmission of the packet" -- excellent, that's exactly what I wanted! But there is a problem: in the actual code no a function with this name used at all!

I also found the sys_arch_mbox_fetch() function. I am using the sys_arch.c file from the "ports" directory, and the function that there is present seems to be a thing-in-itself -- it also doesn't do any receiving a message, it just waiting for a mbox struct to be changed -- seems, this should be changed by an otherworldly force. So this doesn't seem to be the function, I am looking for.

So, what is the functions that doing an actual transmission/receiving a data?

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