Port for Cortex-R5

Kernel
1

zealhero wrote on Wednesday, September 03, 2014:

Hi.

I searched a way of porting for RM57L843 and found it. The ways is it porting Cortex-R4 is similar with it so modify it…
I used FreeRTOS on RM48 before. So I tried it but I think it is not finished completely…
because it works strangly a little.
My system works if I make two simple task. But only one task is run when they have same priorities.
Scheduler is not start normally when I make a task, do more works. But it worked well previous system(RM48)

What files are needed change or revision?
Especially, I don’t know how can I make a sys_link.cmd file for memory allocation.

I use HALCoGen 4.0 of TI for making all of base files, then combine with OS files.

Please give me a tip for port for RM57.

I’m using FreeRTOS 8.0 and using Code Composer Studio 6.0.

Thank you.

2

rtel wrote on Wednesday, September 03, 2014:

But only one task is run when they have same priorities.

Lets start with a simple scenario and then increase the complexity to see at which point it stops behaving as it should.

Set configUSE_PREEMPTION to 0 in FreeRTOSConfig.h to stop the tick interrupt trying to switch between the two tasks.

Next create two task as follows:



volatile unint32_t ulTask1 = 0, ulTask2 = 0;

void vTask1( void *pvParameters )
{
    for( ;; )
    {
        ulTask1++;
        taskYIELD();
    }
}

void vTask2( void *pvParameters )
{
    for( ;; )
    {
        ulTask2++;
        taskYIELD();
    }
}

When you run this, do both tasks run? (do ulTask1 and ulTask2 both increment at the same rate).

If so, inspect xTickCount in the debugger - is that also incrementing?

Regards.

3

zealhero wrote on Thursday, September 04, 2014:

oh… I’m sorry. My system cannot create a task… because i tried to revise many things.

I will try your suggestion if it can create a task.

This is another question. Is it right to use RM48 cmd file(e.g. sys_link.cmd) for RM57?

RM57 has bigger memory…

4

rtel wrote on Thursday, September 04, 2014:

I would assume you should use the correct file for the device you are using but you might get away with it with some wasted resources if the smaller chip is a subset of the larger.

Regards.

5

zealhero wrote on Thursday, September 11, 2014:

Hi.
I found the problems and I fixed it.
It works very well.
Thank you for your help

6

rtel wrote on Thursday, September 11, 2014:

Please upload your code to http://interactive.freertos.org thanks.

Regards.