LPCXpresso IDEのトピックRe: ROS for lpcXpresso

ROS for lpcXpresso

lpcware — Thu, 16 Jun 2016 01:03:05 GMT

Content originally posted in LPCWare by lukkezeh on Wed Feb 03 16:46:02 MST 2010
Hello all,

I am looking for a real time operating system wich i can run on my lpcXpresso. Does someone know wich one i could use?

thanks,

Re: ROS for lpcXpresso

lpcware — Thu, 16 Jun 2016 01:03:06 GMT

Content originally posted in LPCWare by CodeRedSupport on Thu Feb 04 01:05:28 MST 2010
There are a number of RTOSs that you can use, but one that we know works well with LPCXpresso is FreeRTOS. www.freertos.org.

Note that this is not (yet?) supported on LPC11xx - mainly because they are such small ram/flash footprint devices, after the RTOS, there will be hardly any room for your application!

Re: ROS for lpcXpresso

lpcware — Thu, 16 Jun 2016 01:03:07 GMT

Content originally posted in LPCWare by rkiryanov on Thu Feb 04 01:27:03 MST 2010

Quote: CodeRedSupport
there will be hardly any room for your application!

my own OS (speed optimization):

    Module              ro code  ro data  rw data
    ------              -------  -------  -------
    OS.o                  2 640               244
    OS_low_level.o           88                32

It has many inline code, so application code grows instead of OS code, but I can move it to OS.cpp. I think, it is applicable for 32k flash devices.

Re: ROS for lpcXpresso

lpcware — Thu, 16 Jun 2016 01:03:07 GMT

Content originally posted in LPCWare by rkiryanov on Thu Feb 04 01:33:47 MST 2010

Quote: lukkezeh

scmRTOS

Re: ROS for lpcXpresso

lpcware — Thu, 16 Jun 2016 01:03:08 GMT

Content originally posted in LPCWare by kendwyer on Thu Feb 04 20:23:38 MST 2010
Segger also have a basic port done for the LPC111x devices but it is an IAR project....
http://www.segger.com/cms/download_embos-cm0-iar.html

Re: ROS for lpcXpresso

lpcware — Thu, 16 Jun 2016 01:03:08 GMT

Content originally posted in LPCWare by lukkezeh on Fri Feb 05 06:33:32 MST 2010
Maybe i had to say that i'm having an xpresso 1343

Re: ROS for lpcXpresso

lpcware — Thu, 16 Jun 2016 01:03:09 GMT

Content originally posted in LPCWare by Gerrit on Wed Feb 17 04:13:24 MST 2010
All,
Please find attached a very very quick FreeRTOS port for the LPC1343. This is done very quickly, so no garantees.
Scheduling + schedule call works.

This might be a good starting point for you app.

Cheers

Re: ROS for lpcXpresso

lpcware — Thu, 16 Jun 2016 01:03:10 GMT

Content originally posted in LPCWare by brucesegal on Wed Feb 17 09:19:57 MST 2010

Quote: rkiryanov
my own OS (speed optimization):

    Module              ro code  ro data  rw data
    ------              -------  -------  -------
    OS.o                  2 640               244
    OS_low_level.o           88                32

It has many inline code, so application code grows instead of OS code, but I can move it to OS.cpp. I think, it is applicable for 32k flash devices.

HI,

When do you think you will have the M0 port up on sourceforge?

I don't mind testing a alpha/beta version.

Bruce

Re: ROS for lpcXpresso

lpcware — Thu, 16 Jun 2016 01:03:10 GMT

Content originally posted in LPCWare by rkiryanov on Wed Feb 17 10:07:38 MST 2010

Quote: brucesegal
When do you think you will have the M0 port up on sourceforge?

Hi, Bruce!

Never. It hasn't any rocket technologies. Read "ARMv6-M Architecture
Reference Manual" and other OS source code. It is simple.

Re: ROS for lpcXpresso

lpcware — Thu, 16 Jun 2016 01:03:11 GMT

Content originally posted in LPCWare by rkiryanov on Wed Feb 17 10:15:07 MST 2010

Quote: brucesegal

Use scmRTOS, it's tiny and free.

Re: ROS for lpcXpresso

lpcware — Thu, 16 Jun 2016 01:03:12 GMT

Content originally posted in LPCWare by Gerrit on Thu Feb 18 00:58:21 MST 2010
All,
If you have a scmRTOS port for the LPC1000 families, could you please share with us?

Thanks!

Re: ROS for lpcXpresso

lpcware — Thu, 16 Jun 2016 01:03:12 GMT

Content originally posted in LPCWare by rkiryanov on Thu Feb 18 02:01:32 MST 2010

Quote: Gerrit
port for the LPC1000 families

This is the reason for OS development :) to get OS for dedicated core and with good interface and features. If you have port for M3, try build it for M0. Very little part should be ported from M3 to M0.

Re: ROS for lpcXpresso

lpcware — Thu, 16 Jun 2016 01:03:13 GMT

Content originally posted in LPCWare by rkiryanov on Thu Feb 18 03:12:56 MST 2010
"ARMv6-M Architecture Reference Manual" says following:

ARMv6-M supports the privileged application/OS software model < STROKE> when the OS Extension option is implemented. The architecture variant names for implementations with and without the OS Extension are as follows:
• where the OS extension is not present, ARMv6-M
• where the OS extension is present, ARMv6S-M.< /STROKE>

Is far as I understand, variant ARMv6-M does not exist and Cortex-M0 is always ARMv6S-M, with SysTick, PendSV and MSP/PSP. Is it correct?

Re: ROS for lpcXpresso

lpcware — Thu, 16 Jun 2016 01:03:13 GMT

Content originally posted in LPCWare by igorsk on Thu Feb 18 08:01:17 MST 2010
The M0 TRM says that SysTick is optional. Also,
"Other ARM architectures support the concept of privileged or unprivileged software execution. This processor does not support different privilege levels. Software execution is always privileged, meaning software can access all the features of the processor."
However, it does mention PSP and MSP.
M1 TRM mentions OS Extensions as a configurable option.

Re: ROS for lpcXpresso

lpcware — Thu, 16 Jun 2016 01:03:14 GMT

Content originally posted in LPCWare by SnEAky on Wed Mar 17 05:39:16 MST 2010
Is there a scmRTOS(or another) for the LPC1343 that can be imported in the software that comes with the LPCXpresso?

- SnEAky

Re: ROS for lpcXpresso

lpcware — Thu, 16 Jun 2016 01:03:14 GMT

Content originally posted in LPCWare by igorsk on Wed Mar 17 07:13:48 MST 2010
Any major RTOS should be portable. Maybe try FreeRTOS. I'm not aware of any ready-made examples specifically for LPC13xx.
Here's a book about FreeRTOS for LPC17xx which is also a Cortex-M3:
http://ics.nxp.com/literature/books/microcontrollers/pdf/using.freertos.lpc17xx.summary.pdf

Re: ROS for lpcXpresso

lpcware — Thu, 16 Jun 2016 01:03:15 GMT

Content originally posted in LPCWare by brucesegal on Wed Mar 17 08:38:28 MST 2010
I've tried CoOS from CooCox on the 1114. Very easy to get running.

I've ported SCMRtos to the 1114 and tried that as well.

ChibiOS seem to be very complete and quite quick according to a context switch test done over at Yagarto. I'm probably going to look at that one next. It is pure GPL for the unstable releases then goes to an GPL with linking exception for the stable releases. This makes it suitable for many projects as you can keep your application private as you only link to the OS.

Also

FreeRtos
TNkernel
Nut/OS

Lots to chose from.

Re: ROS for lpcXpresso

lpcware — Thu, 16 Jun 2016 01:03:15 GMT

Content originally posted in LPCWare by SnEAky on Wed Mar 17 12:47:06 MST 2010
Alright, problem is that I don't have knowledge in porting and how to do this. I did managed to get FreeRTOS running on the LPC1343 but I don't think it's 100% reliable because of some syntax warnings in queue.c :

Description Resource Path Location Type
(near initialization for 'xQueueRegistry[0]') queue.c /LPC13xx_FreeRTOS/FreeRTOS_src line 165 C/C++ Problem

+ if i try to enable IDLE_HOOK and TICK_HOOK it will give me warnings aswel.

That's why I am looking for a precompiled RTOS for the LPCXpresso 1343.

I've also tried to look how to PWM(50Hz) using a RTOS, but so far no luck. Can someone push me in the right direction?

Thanks in advance

Re: ROS for lpcXpresso

lpcware — Thu, 16 Jun 2016 01:03:16 GMT

Content originally posted in LPCWare by Mark_O on Wed Mar 17 21:50:56 MST 2010

Quote: brucesegal
I've tried CoOS from CooCox on the 1114. Very easy to get running. I've ported SCMRtos to the 1114 and tried that as well.

ChibiOS seem to be very complete and quite quick according to a context switch test done over at Yagarto. I'm probably going to look at that one next...

Also: FreeRtos, TNkernel, Nut/OS.

Bruce,

do you know of anyone who has examined (compared) overheads from task-switching (context save/restore) and scheduling amongst the many RTOS options? I'd find that information interesting, and potentially useful.

- Mark

Re: ROS for lpcXpresso

lpcware — Thu, 16 Jun 2016 01:03:17 GMT

Content originally posted in LPCWare by brucesegal on Thu Mar 18 08:50:57 MST 2010

Quote: Mark_O
Bruce,

do you know of anyone who has examined (compared) overheads from task-switching (context save/restore) and scheduling amongst the many RTOS options? I'd find that information interesting, and potentially useful.

- Mark

Mark,

The only one I saw recently was the review at Yagarto

http://www.yagarto.de/projects/rtoscomp/index.html

In the article it is mentioned that UC/OS and FreeRTOS did not wish to be part of the comparison and so are not included.