LPC MicrocontrollersのトピックRe: Example Raw socket for MCUXpresso IDE v11.1.0

Example Raw socket for MCUXpresso IDE v11.1.0

Rainbow73 — Wed, 20 Jan 2021 17:55:32 GMT

Are there any examples that use raw sockets for the MCXpresso version (MCUXpresso IDE version v11.1.0 [Build 3209] [2019-12-12])?

Re: Example Raw socket for MCUXpresso IDE v11.1.0

frank_m — Thu, 21 Jan 2021 08:13:54 GMT

Is there nothing appropriate in the lwip example section ?

Re: Example Raw socket for MCUXpresso IDE v11.1.0

ZhangJennie — Thu, 21 Jan 2021 08:40:37 GMT

Hi frank_meyer

What's the part number? Please let me know I will check.

Thanks,

Jun Zhang

Re: Example Raw socket for MCUXpresso IDE v11.1.0

frank_m — Thu, 21 Jan 2021 10:01:19 GMT

I'm having the OM13098 (LPCXpresso 54628) development board. The SDK package for this board contains several lwip examples. I didn't try them out myself, though.

I assume the OP's hardware features a ethernet port, so the appropriate SDKs will come with the lwip examples as well.

Re: Example Raw socket for MCUXpresso IDE v11.1.0

Rainbow73 — Thu, 21 Jan 2021 11:07:36 GMT

Sorry!
I work with LPC54606, MCXpresso (version MCUXpresso IDE v11.1.0 [Build 3209] [2019-12-12])
and SDK 2.7.0 (2019-12-18).

In the "lwip_examples" section I don't find any raw socket examples.

Is that so or am I wrong?

Thanks

Re: Example Raw socket for MCUXpresso IDE v11.1.0

frank_m — Thu, 21 Jan 2021 11:22:39 GMT

Mine does not exactly contain raw socket examples either, to be honest. This might be a bit beyond the scope of normal SDK examples, I suppose.

I would try find a generic PC (Unix) example to port, there are plenty around. However, you need to check with the lwip implementation. The "lw" stands for "lightweight", so not the whole BSD socket stack is covered.

Re: Example Raw socket for MCUXpresso IDE v11.1.0

Rainbow73 — Thu, 21 Jan 2021 13:50:33 GMT

Thanks for your answer.
I was hoping there were some examples on lwip just because I didn't want to pull in a standard linux raw socket.
If there were lwip functions to manage these sockets it was certainly better.

Re: Example Raw socket for MCUXpresso IDE v11.1.0

frank_m — Thu, 21 Jan 2021 14:20:06 GMT

Perhaps you find a raw-socket lwip example for another Cortex M MCU, the lwip calls are most probably the same. Because of peripheral and pin setup, I would still start with a SDK example for the specific processor. This saves a lot of time.

In my experience, there is very rarely the perfect example that fits your application exactly.

And be aware of limited resources of Cortex M devices in general. Ethernet can be demanding. A lot of IoT application fail in real-world environment, because they cannot deal with the average office network throughput.

Re: Example Raw socket for MCUXpresso IDE v11.1.0

ZhangJennie — Fri, 22 Jan 2021 03:02:51 GMT

For LPC546xx, the only TCP/IP stack we have is SDK "lwip_examples". No Raw socket samples.

Re: Example Raw socket for MCUXpresso IDE v11.1.0

Rainbow73 — Thu, 28 Jan 2021 09:28:36 GMT

I am modifying the functions found in the raw.c file
to do a custom development that I need.
Thanks for help