TMS320F28388D: How to configure CPU TIMER0 registers in CM ?

Hidehiko Kaya

Tool/software:

Hi experts

I need to set CPU Timer0 in CM like following code.

    CPUTimer_setPeriod( CPUTIMER0_BASE, 2500);  /* 2,500clk = 20,000 ns */
    CPUTimer_clearOverflowFlag( CPUTIMER0_BASE);
    CPUTimer_stopTimer( CPUTIMER0_BASE);
    Interrupt_setPriority( INT_TIMER0, 1);
    Interrupt_registerHandler( INT_TIMER0, Timer0IntHandler);
    Interrupt_enable( INT_TIMER0);
    CPUTimer_startTimer( CPUTIMER0_BASE);
    CPUTimer_enableInterrupt( CPUTIMER0_BASE);

However CPU Timer 0 registers are not enabled to configure.

It might be to block to write.

These registers have write protection in CM.

But I do not find a wait to unlock a protection in a technical document .

Could you please let us know how to unlock protect ?

Best regards,

Hidehiko

over 1 year ago

0 Benjamin Collier over 1 year ago

TI__Mastermind 36526 points

Hi,

Please allow me to get back to you next week, I apologize for the delay.

Best Regards,

Ben Collier

0 Benjamin Collier over 1 year ago

TI__Mastermind 36526 points

Hi,

You should be able to put the following line before you try to write to the register:

EALLOW;

You can relock with:

EDIS;

Best Regards,

Ben Collier

0 Hidehiko Kaya over 1 year ago in reply to Benjamin Collier

Intellectual 700 points

Hi Ben,

I need a way to configure in CM.

When I added "EALLOW; ... EDIS;" on my code,

it caused a build error.

EALLOW and EDIS are undefined.

Best regards,

Hidehiko

0 Benjamin Collier over 1 year ago in reply to Hidehiko Kaya

TI__Mastermind 36526 points

Hi Hidehiko,

Could you take a look at the CM driverilb functions for timer operations?

Please also take a look at this thread: https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/1228115/tms320f28388d

Thanks,

Ben Collier

0 Hidehiko Kaya over 1 year ago in reply to Benjamin Collier

Intellectual 700 points

Hi Ben,

I do not find description about CM driverlib functions.

CPU1,CPU2 = TI DSP

CM = ARM

SPNU151W.pdf(ARM Optimizing C/C++ Compiler)

It does not describe about EALLOW.

EALLOW is TI DSP(TMS320C28x) C/C++ Compiler Instruction in spru514y.pdf (C2000 compiler manual)

Best regards,

Hidehiko

0 Benjamin Collier over 1 year ago in reply to Hidehiko Kaya

TI__Mastermind 36526 points

Hi,

Did you try writing these registers without trying to unlock them?

I'm looking at the driverlib functions and there is nothing addressing the write protections.

Set period function:

static inline void CPUTimer_setPeriod(uint32_t base, uint32_t periodCount)
{
    ASSERT(CPUTimer_isBaseValid(base));

    //
    // Load the MSB period Count
    //
    HWREG(base + CPUTIMER_O_PRD) = periodCount;
}

Best Regards,

Ben Collier

0 Hidehiko Kaya over 1 year ago in reply to Benjamin Collier

Intellectual 700 points

Hi Ben,

Do you mean that those registers do not need EALLOW ?

Are they miss description about Write Protection ?

Best regards,

Hidehiko

0 Benjamin Collier over 1 year ago in reply to Hidehiko Kaya

TI__Mastermind 36526 points

Hidehiko,

Hidehiko Kaya said:
Are they miss description about Write Protection ?

I think that may be the case, could you try writing them?

Thanks,

Ben Collier

0 Hidehiko Kaya over 1 year ago in reply to Benjamin Collier

Intellectual 700 points

Ben,

Thank you for your comment.

I understand that "write protection" includes miss-description.

Best regards,

Hidehiko

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TMS320F28388D: How to configure CPU TIMER0 registers in CM ?