Leightweight RTOS for Cortex M3 development on Linux?

[davorin]

What do people use here for developing applications under a RTOS for Cortex M0 - M4 family?

So far I only used riot-os, which is rather a nice OS but more for wireless sensor networks...
And just tried to install zephyr...well documented...not a nightmare to install..so I just deleted it again (o;

Basically I am looking for:

- leightweight, small footprint
- tcp/ip stack for small server application
- No Eclipse IDE or any other JAVA monster (o;

FInal goal is to run a GPIB TCPIP proxy on a smartfusion2 SoC which Microsemi is giving away rather cheap (o;

[krho]

FreeRtos with tcpip stack and fat stack is now MIT licensed.

[mubes]

My go-to tends to be freertos but if you fancy swimming upstream a bit then take a look at MBED-OS which appears to incorporate a MIT licenced version of Keil RTX. I've only glanced at it so far and it's on my to-do list but that list keeps on getting longer so it could be a while.

MBED itself seems to have a lot of community contributed drivers, and I'm not sure how I feel about that <Glances nervously in direction of Arduino>.

If you _do_ look into it then please report back...inquiring minds would like to know.

Dave

[mac.6]

If you don't mind GPL licence, chibiOS is another choice, quite a lot of port and drivers.

[mubes]

Yes, chibiOs, and especially it's HAL, is pretty nice, provided you happen to be on a well supported chip....unfortunately I doubt the smartfusion perhiperals will meet that criterion.

Dave

[mac.6]

It's always the same thing with RTOS+framework bundles. Either it's a fast lane with good supported chips, or a nightmare with non supported ones.
That's why I tend to use minimal FreeRTOS port with vendor provided SDK/libs.

[capt bullshot]

I've made my own ecosystem for STM32 devices, using ChibiOS, LwIP, and STM STDFW / HAL drivers (just to be able to use their CubeMX tool for pinout configuration).
No fancy IDE, everything relies on Makefiles. Quite ugly stuff, anyway ...

http://wunderkis.de/thestm32files.html

BTW:
I've done a TCP to GPIB board in ancient times, using ancient technology (this links to a German page):
http://wunderkis.de/scbrd/index.html

[Sal Ammoniac]

I have my own RTOS that I originally wrote for the M68000 and which I've ported to the ARM Cortex-M, PIC32, AVR32, etc. It has two advantages for me: 1) I know the code intimately (because I wrote it); 2) no licensing issues.

[westfw]

I'd normally thing of "an RTOS" and "a TCP/IP" stack as separate products...
A lightweight RTOS is pretty easy, and there are lots of choices.  TCP stacks... have a lot more opportunity for bloat, and I think fewer well-respected implementations. :-(

[krho]

tcp/ip stack that desn't support ipv6 now days isn't worth the bytes it occupies.

[Karel]

tcp/ip stack that desn't support ipv6 now days isn't worth the bytes it occupies.

Why? Is there any place where you can't use IPv4?