ADC Interrupt issue when CLA task is not empty

vadim piskun

Hi Lori,

I am using two identical filtering procedures in CLA tasks

__interrupt void Cla1Task1 ( void )
{
__mdebugstop();
int i;
float fTemp = 0;
fTemp = 0;
#pragma UNROLL(49)
for(i=FILTER_LEN-1;i>0;i--)
{
fDelayLine1[i] = fDelayLine1[i-1];
fTemp += W1[i]*fDelayLine1[i];
}
fDelayLine1[0] = (float)xn1; //convert to single precision float
fTemp += W1[0]*fDelayLine1[0];
yn1 = (int)fTemp;
__mdebugstop();
}
__interrupt void Cla1Task2 ( void )
{
__mdebugstop();
/* int i;
float fTemp = 0;
fTemp = 0;
#pragma UNROLL(49)
for(i=FILTER_LEN-1;1>0;i--)
{
fDelayLine2[i] = fDelayLine2[i-1];
fTemp += W2[i]*fDelayLine2[i];
}
fDelayLine2[0] = (float)xn2; //convert to single precision float
fTemp += W2[0]*fDelayLine2[0];
yn2 = (int)fTemp;*/
yn2 = xn2; // just to bypass filtering
__mdebugstop();

}

I am calling those tasks from adc_int

interrupt void adca_isr(void)
{
xn1 = AdcaResultRegs.ADCRESULT0;
Cla1ForceTask1andWait();
DacbRegs.DACVALS.all = yn1;//left
}

interrupt void adcb_isr(void)
{
xn2 = AdcbResultRegs.ADCRESULT0;
Cla1ForceTask2andWait();
DaccRegs.DACVALS.all = yn2;//right
}

And clear interrupt here

__interrupt void cla1Isr1 ()
{
AdcaRegs.ADCINTFLGCLR.bit.ADCINT1 = 1;
PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
PieCtrlRegs.PIEACK.all = M_INT11;
// asm(" ESTOP0");
}

//
// cla1Isr1 - CLA1 ISR 2
//
__interrupt void cla1Isr2 ()
{
AdcbRegs.ADCINTFLGCLR.bit.ADCINT1 = 1;
PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
PieCtrlRegs.PIEACK.all = M_INT11;
// asm(" ESTOP0");
}

The problem is if I uncomment the second CLA task filter it stops issuing both adca and adcb interrupt

thanks vadim

over 4 years ago

0 Lori Heustess over 4 years ago

TI__Guru* 92780 points

vadim said:
The problem is if I uncomment the second CLA task filter it stops issuing both adca and adcb interrupt

When this happens what state is the CLA in?

If, for example, the CLA is stopped on an mdebugstop() then the cla1Isr1/isr2 would not not be called and no more interrupts from the ADC would come in (because the ADC flag is cleared in the cla ISRs). I see that the mdbugstop() is in both tasks, but perhaps the debug was connected when this happened?

If that is not the case, then try to narrow it down the state of the ADC and CLA for clues. What flags are set (both CLA and ADC). Does it look like the CLA is running (MIRUN bit is set) or is it idle, as an example.

Regards

Lori

0 Lori Heustess over 4 years ago in reply to Lori Heustess

TI__Guru* 92780 points

Vadim,

Please use the syntax highlighter for code inserted into a post. It makes it much easier to read. It looks like < / > in the editor options.

Thank you

Lori

0 vadim piskun over 4 years ago in reply to Lori Heustess

Expert 2230 points

Hi Lori,

How do I highlight syntax?

thanks vadim

0 Lori Heustess over 4 years ago in reply to vadim piskun

TI__Guru* 92780 points

vadim said:
How do I highlight syntax?

Please see this FAQ for a description of how to insert code with syntax highlighting.

e2e.ti.com/.../812271

Thank you

Lori

0 vadim piskun over 4 years ago in reply to Lori Heustess

Expert 2230 points

Hi Lori

I tried all options but it comes like this after I copy the code from CCS and paste it according to the thread.

thanks vadim

#include <msp430.h>

#include <msp430.h>

int main(void)
{
  WDTCTL = WDTPW | WDTHOLD;                 // Stop WDT

  // Configure Comparator input & output
  P1SEL0 |= BIT1;                           // Select eCOMP input function on P1.1/C1
  P1SEL1 |= BIT1;
  P2DIR |= BIT0;
  P2SEL1 |= BIT0;                           // Select CPOUT function on P2.0/COUT

0 Lori Heustess over 4 years ago in reply to vadim piskun

TI__Guru* 92780 points

Vadim,

Thank you. the MSP430 code in your last post is much easier to read than previous code fragments. It seems to have worked.

Regards

Lori

0 vadim piskun over 4 years ago in reply to Lori Heustess

Expert 2230 points

Hi Lori,

I see a lot of posting in color with lines numbering. how can I do it?

thanks vadim

0 Lori Heustess over 4 years ago in reply to vadim piskun

TI__Guru* 92780 points

1) click on the </> button

2) paste the code into the box

3) hit insert - once the reply is made the syntax highlighting will take effect.

void
pto_initEQEP(void)
{

    GPIO_setPinConfig(GPIO_10_EQEP1A);
    GPIO_setPadConfig(10, GPIO_PIN_TYPE_STD);
    GPIO_setQualificationMode(10,GPIO_QUAL_SYNC);