Quality RTOS & Embedded Software

 Real time embedded FreeRTOS RSS feed 
Quick Start Supported MCUs PDF Books Trace Tools Ecosystem TCP & FAT




Loading

Port for Cortex-R5

Posted by zealhero on September 3, 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.


Port for Cortex-R5

Posted by rtel on September 3, 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.


Port for Cortex-R5

Posted by zealhero on September 4, 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..


Port for Cortex-R5

Posted by rtel on September 4, 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.


Port for Cortex-R5

Posted by zealhero on September 11, 2014

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


Port for Cortex-R5

Posted by rtel on September 11, 2014

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

Regards.


[ Back to the top ]    [ About FreeRTOS ]    [ Sitemap ]    [ ]




Copyright (C) Amazon Web Services, Inc. or its affiliates. All rights reserved.

Latest News

FreeRTOS kernel V10 is available for immediate download. Now MIT licensed.


FreeRTOS Partners

ARM Connected RTOS partner for all ARM microcontroller cores

IAR Partner

Microchip Premier RTOS Partner

RTOS partner of NXP for all NXP ARM microcontrollers

STMicro RTOS partner supporting ARM7, ARM Cortex-M3, ARM Cortex-M4 and ARM Cortex-M0

Texas Instruments MCU Developer Network RTOS partner for ARM and MSP430 microcontrollers

OpenRTOS and SafeRTOS