FreeRTOS port for K12

[Hab]

Hello all, a few questions:

Does anyone have or know where I can find a freeRTOS port for the K12 processor using IAR?

If there is a K10 port, would it cover the K12?

Yes I have checked freeRTOS.org, the only thing I can find there is a K60 IAR port.

Specifically I am using the MK12DX256

Thanks,

Hab

[BlackNight]

You can use the KL25Z port, as the K12/K15 is the same core (Cortex M0+).

There is even a Processor Expert version of it:

http://mcuoneclipse.com/2013/01/31/tutorial-iar-freertos-freedom-board/

Additionally, that GitHub site has static (without Processor Expert) ports.

I hope this helps,

Erich

[Hab]

Much thanks for responding.  I am not sure I can use this because of the following concerns:

1. The K12 is an M4, the KL25 I belive is an M0.

2. The URL describes the need for 3 different software packages, IAR, PE driver suite, and additional PE components.  We require all firmware be written in IAR.

But since you mentioned an M0, freeRTOS does have a K60 IAR demo project.  The K60, like the K12 is an M4, but with more stuff.  Can I use that port?  If so, do you know if there anything I must do to the port to make it work for a K12 device?

Thanks,

Hab

[BlackNight]

Hi Hab,

yes, I realize that this is a M4, not an M0.

>>We require all firmware be written in IAR.

So IAR writes all your code? ;-) I guess you mean that your code is *compiled* with IAR. And this is the case for above case :-). IAR is still the tool you are using. And you can simply copy the code and place it into your project.

And yes, you could use that K60 port. Altough I think it might be somewhat outdated.

Or you could take the most recent port from

https://github.com/ErichStyger/mcuoneclipse/tree/master/Examples/FreeRTOS_Ports/IAR/FreeRTOS_FRDM-KL...

And then in the FreeRTOSconfig.h you change the core to M4. Should be very simple.

Erich

[Hab]

Any feedback on this?

Does this mean there is not a solution for Kinetis K1X on FreeRTOS?

[BlackNight]

I'm sorry, I missed your first reply. I see now your problem. Working on it right now.

[BlackNight]

Hello,

I have fixed the guilty portasm.s (attached), and it works now for me with IAR 6.50.

I have attached as well my project for the FRDM-K20D50M for reference.

This should solve the problem.

Otherwise, let me know.

[Hab]

Much thanks for your patience and support.

The supplied portasm.s complied, but the scheduler crashes when I run.  vTaskStartScheduler() fails on a call to vPortStartFirstTask().  The processor fails on 2 vectors within vPortStartFirstTask():  Vector 11 on

line 199: svc 0

And the hard fault Vector 3

line 200: nop

To accomodate for the K12 (specificaly I am using the MK12DX256) I am making only 3 changes to the FreeRTOSConfig.h you supplied

line 93: #define configCPU_CLOCK_HZ                        50000000u // WAS 48MHz

line 94: #define configBUS_CLOCK_HZ                        50000000u // WAS 48MHz

line 172: #define configCPU_FAMILY                     configCPU_FAMILY_ARM_M4 // WAS configCPU_FAMILY_ARM_M0P

Help...

[BlackNight · Accepted solution]

Have you assigned the following three vectors in your vector table?

	DCD	vPortSVCHandler ;SVC_Handler
	DCD	0
	DCD	0
	DCD	vPortPendSVHandler; PendSV_Handler
	DCD	vPortTickHandler; SysTick_Handler

(depends how you define your vector table, but you need to have above vectors set)

I hope this helps.

[Hab]

I added the 3 handlers to my IRQ Vector Table and the two simple tasks I created for testing started working.

Many, many thanks for your time and your help!!!

Next I will add a few ISR to ready tasks just to make sure all works as it should.  If I have any additional questions can I post to this thread or should I start a new?

[Hab]

Much thanks for responding.

I modified my project and added the FreeRTOS to my project from the link.  (First time using GitHub so that was an experience - painful).  I changed FreeRTOSconfig.h to use M4 core as suggested.

Defining the M4 core in FreeRTOSconfig.h causes the file portasm.s to require a definition for pxCurrentTCBConst and pxCurrentTCBConst2 which are undefined.  I searched the FreeRTOS directory and the project but could not find a definition for these - Help...

Thanks,

Hab