Questions about Software Phase Locked Loop (SPLL) using CLA solar library

Other Parts Discussed in Thread: CONTROLSUITE

HI,

<Sorry for this long message, but I have to explain to in details.>

I am now using CLA solar library with a F28069 Piccolo Experimenter Kit  to implement the Phase Locked Loop. I follow the document “CLA C Solar Library” V.1.1 to implement the SPLL. There are few questions during the development. I hope if anyone can give me a hand.

1. As described in the document page 23, the initialization function “SPLL_1ph_CLA_C_INIT(spll1, 50, (0.00005));” is put in the {ProjectName}-Main.c, I found that the function cannot gets problems. As I saw from the emulator that the variables inside the function cannot be inititialzed. Then, I put it into task 8 of the CLA ISR. The problem can be solved. I just wanna confirm is this initialization should be put into CLA task8 ISR instead of putting in the main.c?
2. After that, I still not be able to implemnt the SPLL as the variables cos1 cos0 sin1 sin0 are all become zero after SPLL_1ph_CLA_C(spll1) onetime, seems from the CCS using the emulator.

P.S. I tried the following source of AC_input, the results are the same:

1.       Using a signal generator to generate 0~3.3V sine wave with 1.165V offset and a ADC channel to pick it up:

    //adcvalue = ADCDRV_1ch_CLA_C(AdcResult.ADCRESULT1);

    //spll1.AC_input = (adcvalue - 0.5) * 2;

2.           A global variable CLA_PLLVal ( a sine value generated using float point function sin()):

    //1000 samples!

    if (OpenPll.TimeTick == 1000)

    {

         OpenPll.TimeTick=0;

         openpll_temp1 = 0;

         CLA_PLLVal = 0;

    } else {

         OpenPll.TimeTick++;

         openpll_temp1 = sin(PIX2*50*OpenPll.TimeStep*OpenPll.TimeTick);

         CLA_PLLVal = openpll_temp1;

    }

P.S2. The SPPL is put in CLA task1, triggered by PWM1 interrupt, 20kHz.

Thanks,

Barry