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MSP430FR5739: Timer A capture mode not triggering on input

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Part Number:MSP430FR5739

Hi,

I try to get the Timer A working in capture mode:

#include <msp430.h> 
#include <stdint.h>



/**
 * main.c
 */
uint32_t count_rotate = 0;
uint16_t count_time = 0;

int main(void){
    WDTCTL = WDTPW | WDTHOLD; // stop watchdog timer

    CSCTL0_H = 0xA5;                         // Unlock Clock Door
    CSCTL1 |= DCORSEL + DCOFSEL0 + DCOFSEL1; // DCO on 24 MHz for MSP DCORSEL = 1 , DCOFSEL = 11
    CSCTL2 = SELA_0 + SELS_0 + SELM_3;       // ACLK(Periph) -> XT1CLK / SMCLK(Periph) -> XT1CLK / MCLK -> DCOCLK
    CSCTL3 = DIVA_0 + DIVS_0 + DIVM_0;       // Div = 0 -> FULL SPEED
    CSCTL4 |= XT1DRIVE_0;                    // Enable LOW POWER
    CSCTL4 &= ~XT1OFF;                       // XT1 enable

    P1DIR &= ~BIT0;
    P1SEL0 |= BIT0;  // Enable CCI1A on 1.2
    P1SEL1 &= ~BIT0;

    P3DIR = BIT4;    // Enable LED
    P3OUT ^= BIT4;

    TA0CCTL1 = CM_1 + CCIS_0 + SCS + CAP + CCIE;             // Capture On Rising Edge + Capture Mode + Capture Interrupt + CCI1A + Sync
    TA0EX0 = TAIDEX_3; //Divide by 4 -> get 1024
    TA0CTL = TASSEL_1 + MC_2 + ID__8;                 // ACLK(32kHz), continuous mode  -> 32768 / 8 -> 4096
    //TA0CTL |= TACLR;    // Reset Timer
    for (;;)
    {

    }

    return 0;
}

#pragma vector = TIMER0_A0_VECTOR
__interrupt void Timer0_A0_ISR(void)
{
    switch (__even_in_range(TA0IV, 0x0E)) //Check which interrupt was selected
    {
    case 2:{ //CCR1
        P3OUT ^= BIT4;
        count_rotate++;
        count_time = TA0CCR1;
    }
    }                        
}

The Counter is counting up in TA0R when I watch the registers in Debug but it will not copy the value to TA0CCR1 when a raising edge is coming..

Also the CCI in TA0CCTL1 always stays on '1' independently from P1.0.

Someone see the error?

Greetings

Eric

 


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