I went through this learning curve last year and did essentially the same thing (for a very different board environment). The basic steps are:
1. Create a cc.h for your port. This is straight-forward and involves choosing types for u8, u16, u32, etc. as well as setting endianness 2. Create a sys_arch.h for your port. For a no-OS (NOSYS=1) environment, this is trivial. 3. Create an lwipopts.h for your port. Some is straight-forward; some is tricky even though the file is not large. It requires you to make choices about several things that you probably don't know enough about to make competent choices (at least that was the case for me when I started); you may need to ask questions on the list about this. 4. Create a driver for your network adapter. This is very device-specific and probably a pretty large task, especially if you're starting from nothing. This needs to: A. Find and initialize the adapter and get it ready for operation (probably prime it with buffers to receive into). B. Pull received frames from your network adapter and place each into an LWIP pbuf, then pass those up the stack into LWIP C. Provide an entry point for LWIP that can take a frame contained within a pbuf and transmit it to your network adapter. 5. Call LWIP init function, add your driver above as a netif under LWIP. 6. Create your main loop that essentially polls your driver, and periodically calls the LWIP housekeeping function. I've attached a sanitized version of my LWIP port files in case it's helpful as a model. Note that my system has gobs of memory available and the LWIP performance is not critical so my lwipopts.h settings are likely completely unsuitable for you. Jeff On Thu, Nov 4, 2010 at 9:23 AM, Kieran Mansley <[email protected]> wrote: > On Thu, 2010-11-04 at 06:14 -0700, André wrote: >> That is why we are looking for porting directly to the board. But I >> realy don't know how I do this. > > Porting to a new board, tool chain, etc is not a good way to start with > lwIP: the learning curve is steep and the documentation is limited. I > would start here: > > http://lwip.wikia.com/wiki/LwIP_Platform_Developers_Manual > > but I would expect you will need a lot of help to get going. > > Kieran
mch_lwip.tgz
Description: GNU Zip compressed data
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