CCS/MSP430FR6972: msp430fr6972

Tool/software: Code Composer Studio

Hello ,

I am making CAPTURE PROGRAM.

I am using MSP430FR6972 (I am making a pulse counter)

My intention is  1) to take the analog Value through capture program,

                       2) and then send to value to scope (to check the frequency).

I am also using UART program , and checking the "Tx data" to scope 

( I am not sure...i am doing correct or not ......  The data received by CAPTURE .....is sending via uart)

But I am getting some random value at SCOPE ( some time MHz, sometimes KHz)

unsigned int timerAcapturePointer = 0;
int main(void)
{
  WDTCTL = WDTPW | WDTHOLD;                 // Stop watchdog timer

    
  PM5CTL0 &= ~LOCKLPM5;

 //===============================PIN DEFINED===========================================

          P1SEL0 |=BIT3 ;                    // Pulse Capture
          P1SEL1 &=~BIT3;
          P1DIR &=~BIT3;


  //====================================CLOCK==============================================
/*
  // Clock System Setup
  CSCTL0_H = CSKEY >> 8;                    // commented
  CSCTL2 |= SELA_7;                          //commented
  CSCTL2 |= SELA__VLOCLK;                   // commented
  CSCTL0_H = 0x00;                          // commented

//  __delay_cycles(1000);                     // commented
*/


              CSCTL0_H = CSKEY >> 8;
             CSCTL1 = DCOFSEL_0;
             CSCTL2 = SELA__LFXTCLK | SELS__DCOCLK | SELM__DCOCLK;
             CSCTL3 = DIVA__1 | DIVS__1 | DIVM__1;
             CSCTL4 &= ~LFXTOFF;
             do
             {
               CSCTL5 &= ~LFXTOFFG;
               SFRIFG1 &= ~OFIFG;
             }while (SFRIFG1&OFIFG);
             CSCTL0_H = 0;


//=======================================================================================

//        LCD_init();                      //commented
        uart_init();
//        adc();                           //commented

 //=================CAPTURE ============================================================
  // Timer0_A3 Setup
  TA0CCTL2 = CM_1 | CCIS_1 | SCS | CAP | CCIE;   // Capture rising edge,Use CCI2B=ACLK,Synchronous capture,Enable capture mode,Enable capture interrupt

  TA0CTL = TASSEL__SMCLK | MC__CONTINUOUS;  // Use SMCLK as clock source,Start timer in continuous mode

   while(1)
   {
  __bis_SR_register(LPM3_bits | GIE);
   }
}



TIMER INTERRUPT  :


#pragma vector = TIMER0_A1_VECTOR
__interrupt void Timer0_A1_ISR(void)
{
  switch (__even_in_range(TA0IV, TA0IV_TAIFG)) {
    case TA0IV_TA0CCR1:


      break;
    case TA0IV_TA0CCR2:
        timerAcapturePointer = TA0CCR2;
      
           putchar(timerAcapturePointer);

      __delay_cycles(100000);
        LPM3_EXIT;
      break;
    case TA0IV_TA0IFG:
      break;
    default:
      break;
  }
}

I am using  MSP430FR6972.
And I want to check the Frequency on the "SCOPE".
There is NO PROBLEM with UART.

CAN YOU PLEASE CHECK IT,,

AND PLEASE TELL ME  .....

where Am I doing wrong?

(I m not sure of the program too......so please response)

Regards,

Srijit.