I have met a issue that I must transplant the tcp/ip in to KL25s chip not the K60,we know that the official only offer the MQXLite(not have TCP/IP suite) for the KL25s chip，I knew little about MQXLite&MQX and TCP/IP before， and now I get this job to be done asap. I hope you can give me some suggestion，thanks.
There is no FEC/Wi-fi controller on KL25. Thus you will need KL25 communication interface, such as SPI or UART, to communicate with an external FEC or wi-fi chip.
-you can use a chip with integrated TCP/IP stack, such as the one used on Avnet WiGo module for wi-fi communication:
(examples: Murata LBWA1ZZVK7, Qualcomm Atheros AR4100P, GainSpan GS1500m, RedPine RS9110-N-11-22-(xx)).
If you wish to run TCP/IP stack on KL25 then you can bring a standalone TCP/IP stack, such as FNET (http://fnet.sourceforge.net/), into your application project and implement the low level interface between the TCP/IP stack and the FEC/wi-fi chip.
I'm glad that you reply me.Yes,I want to run TCP/IP stack on KL25s,so the first option is not feasible.But I found that the FNET is not support the KL25 platform,the same to the MQX's RTCS or uTask,they all do not support the KL25 platform.
Does it mean that the TCP/IP stack can not run on KL25？
TCP/IP stack like FNET can run on KL25 as it is mostly C code. It only means there is no demo so you will need to port FNET to a KL25 project/development IDE and implement the low level driver on your own.
Thanks again,but I found few info about FNET online,not mention to modify its low level driver,I think it will spend a lot time to be familiar with FNET.By modifying the kernel code,Can I configure a MQXos on my own that depend on KL25s also the RTCS can run on it,HOW?