RTOS/TDA3MV: Task create

kenshow

Part Number: TDA3MV
Other Parts Discussed in Thread: SYSBIOS

Tool/software: TI-RTOS

We have met the following phenomena. Would you please advise me if you have any information on the phenomenon in the task creation below?

【phenomenon】
When BspOsal_taskCreate () is called, execution can not be executed if the priority is set to 16 or higher. Priority 15 can be executed.

I debugged the source code, but in BspOsal_taskCreate () it seems that Abort is occurring around Task_construct () call.
(bsp_osal.c file)

Regards,
Kenshow

over 7 years ago

0 Rishabh Garg over 7 years ago

TI__Guru 55685 points

Hi Kenshow,

SYSBIOS does not support beyond task priority 15.
What is the purpose of using task priority 16?

Regards,
Rishabh

0 kenshow over 7 years ago in reply to Rishabh Garg

Genius 3725 points

Hi Rishabh,

I believed that the task of SYSBIOS is supported at 32 levels except for 16-bit CPUs such as MSP430, C2x and C55x. Does TDA3x IPU (M4) support only 16 levels?

Regards,
Kenshow

0 Rishabh Garg over 7 years ago in reply to kenshow

TI__Guru 55685 points

Hi Kenshow,

The default number of priorities is 16. The documentation says for ARM devices this is 32.
I will check with BIOS team and get back to you.

Regards,
Rishabh

0 Rishabh Garg over 7 years ago in reply to Rishabh Garg

TI__Guru 55685 points

Hi Kenshow,

In C:/ti/<bios>/packages/ti/sysbios/knl/Task.xdc, numPriorities is set as 16. You should change it to 32 and recompile the SYSBIOS.
Steps to recompile are given in Appendix A "Rebuilding SYS/BIOS" of Bios_User_Guide.pdf (Appendix B in some older BIOS versions).
The question that still needs to be answered is if 32 levels are actually needed in the system.

Regards,
Rishabh

0 kenshow over 7 years ago in reply to Rishabh Garg

Genius 3725 points

Hi Rishabh,

Thanks for quick answer!

Regards,
Kenshow

Processors

Processors forum

RTOS/TDA3MV: Task create