CCS/TMS320F28075: About SYS/BIOS timers

Alvin Kim

Prodigy 50 points

Part Number: TMS320F28075
Other Parts Discussed in Thread: SYSBIOS

Tool/software: Code Composer Studio

Hello,

I have a question about SYS/BIOS timers.

I am using TMS320F28075 and SYS/BIOS 6.73.

I know that TMS320F28075 has 3 cpu timers(0~2). And SYS/BIOS uses cpu timer 0 basically.

I want to use cpu timer 0 for another function.

So I changed SYS/BIOS timer from 0 to 2 as below.

============================================

var Clock = xdc.useModule('ti.sysbios.knl.Clock');
Clock.timerId = 2;

============================================

And I defined timer 0 as below.

========================================================================================

var ti_sysbios_hal_Timer0Params = new ti_sysbios_hal_Timer.Params();
ti_sysbios_hal_Timer0Params.instance.name = "ti_sysbios_hal_Timer0";
ti_sysbios_hal_Timer0Params.period = 260;
Program.global.ti_sysbios_hal_Timer0 = ti_sysbios_hal_Timer.create(null, "&cpu_timer0_isr", ti_sysbios_hal_Timer0Params);

========================================================================================

But SYS/BIOS doesn't works well.

Task and timer are not executed. And I think hwiStack is overflowed.

I checked hwiStackpeak via RTOS Object View(ROV). hwiStackpeak and hwiStackSize are same

I increased the stack size. But It's same.

This is summary for my question.

1. How do i use cpu timer 0 for another function?? How do i change SYS/BIOS timer?

2. I defined cpu timer handler(cpu_timer0_isr). How do i use this handler? Do i have to define this handler on my .c file??

Please advice.

Thank you for your support.

over 6 years ago

0 ToddMullanix over 6 years ago

TI__Guru* 96960 points

US is on holiday on 5/27. Your thread will be answered soon.

0 ToddMullanix over 6 years ago in reply to ToddMullanix

TI__Guru* 96960 points

My apologies!! I went on vacation and just realized I had not assigned this to an engineer. I'm assigning it now and you'll get a response within 24 hours. Sorry again.

Todd

0 Alan DeMars over 6 years ago in reply to ToddMullanix

TI__Mastermind 30830 points

To reduce the number of variables, can you confirm that simply setting Clock.timerId to 2 works by itself without also creating the Timer 0 instance?

Alan

0 Alvin Kim over 6 years ago in reply to Alan DeMars

Prodigy 50 points

Hi, Alan

Thank you for your reply.

Yes, I set Clock.timerId to 2 without creating the Timer 0 instance.

It's working well.

Please advice.

Thank you.

0 Alan DeMars over 6 years ago in reply to Alvin Kim

TI__Mastermind 30830 points

I built and ran a test case locally with the same configuration and it ran indefinitely without errors.

Timer 0 period = 260, Timer 2 period = 1000;

The worst case Hwi stack depth was 118 bytes.

The worst case Idle task stack depth was 78 bytes. My test case only has an Idle task.

My Timer ISR was doing nothing, however.

Can you share what your timer ISR is up to?

'cpu_timer0_isr' should be a plain old Void C function with one argument:

Void cpu_timer0_isr(UArg arg);

Do not use the 'interrupt' keyword modifier with it.

Alan

0 Alvin Kim over 6 years ago in reply to Alan DeMars

Prodigy 50 points

Hi, Alan

Thank you very much!!
As you mentioned I defined cpu_timer0_isr() with 'interrupt' keyword.
It's working well now.

Thank you again for your support.

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CCS/TMS320F28075: About SYS/BIOS timers