LAUNCHXL-F28379D: HWREG or HWREGH not working inside the CLA

Anurag Singh

Part Number: LAUNCHXL-F28379D
Other Parts Discussed in Thread: C2000WARE

Hi,

My CLA task 1 looks like follows -

__interrupt void Cla1Task1 ( void )
{
    float sigma;

    HWREGH(GPIODATA_BASE + GPIO_O_GPADAT) |= GPIO_GPADAT_GPIO10;
    __mdebugstop();

    vg_sense = (float)HWREGH(ADCARESULT_BASE + ADC_O_RESULT0 + 0U);
    iL_sense = (float)HWREGH(ADCBRESULT_BASE + ADC_O_RESULT0 + 0U);

    // Calculation of Sliding Surface Equation
    sigma = K*(vg_Ref - vg_sense) + (iL_sense - iL_Ref);

    if(sigma > HighL)
    {
        // Do something
    }
    else if (sigma < LowL)
    {
        // Do something else
    }

    // GPIO for profiling
    HWREGH(GPIODATA_BASE + GPIO_O_GPADAT) |= GPIO_GPADAT_GPIO10;
}

The HWREGH instruction don't work inside the CLA even though they do work in the C28x (if place in any ISR). I'm not sure why this is happening. Can someone advise me on this.

Update :

I imported the asin_cla project from c2000ware for the F28379D and used the same HWREG function for GPIO toggle and it works there. This is really inconsistent behavior.

over 1 year ago

0 Veena Kamath over 1 year ago

TI__Mastermind 32585 points

Hi,

Just to clarify, are you seeing HWREG macro is working but the HWREGH is not working on the same register?

Regards,

Veena

0 Anurag Singh over 1 year ago in reply to Veena Kamath

Prodigy 95 points

Hi Veena,

Actually, from what I understand it should be HWREG macro for the GPIO set/clear and HWREGH macro for the ADC result registers. This was the change that I did in my code after posting this question. But still, both of them doesn't work - neither for GPIO nor for the ADC.

I saw the CLA code in disassembly (with the memory browser) and found that strangely the MR0 register was not being populated with the memory content or any value that is written to it.

The other thing which I did was - I took the C2000ware example project for F2837x - "asin_cla" and the same GPIO instruction works in that project when placed in the CLA task1.

0 Veena Kamath over 1 year ago in reply to Anurag Singh

TI__Mastermind 32585 points

HWREG is a 32 bit access and HWREGH is a 16 bit access. Since ADC registers are 16 bit, it should use HWREGH.

Are you included the hw_types.h header file in the .cla file?

Regards,

Veena

0 Anurag Singh over 1 year ago in reply to Veena Kamath

Prodigy 95 points

No I haven't included that file. But I did include driverlib.h

Could you please tell what all files need to be included, I will just check once on my side.

0 Veena Kamath over 1 year ago in reply to Anurag Singh

TI__Mastermind 32585 points

driverlib.h includes the hw_types.h header. This header has the definition of those macros.

For the GPIO writes, have you configured the GPIO owner as CLA?

Regards,

Veena

0 Anurag Singh over 1 year ago in reply to Veena Kamath

Prodigy 95 points

Yes, I did configure the GPIO owner as CLA. Actually I looked at the MR0 register which is loaded with GPIO address (when we write the HWREGH instruction) and it was not loading even after the instruction was in execution stage.