HCSR04_not_working

#include <msp430.h>

volatile unsigned int distance_in_cm = 0;
volatile unsigned int rising_edge = 0;
volatile unsigned int start_time;
volatile unsigned int total_time;

void turn_on_timer(){
    P1OUT |= 1;
}

void turn_off_timer(){
    P1OUT &= ~(1);
}


#pragma vector = TIMER0_A1_VECTOR
__interrupt void distance(void){  //TIMERA0 interrupt
    if(rising_edge){
        start_time = TACCR0;    //checks for rising edge, if so, TACCRO is the start time
    }else{
        total_time = TACCR0 - start_time; //when rising_edge = 0, your saved time the pulse went and came back is TACCR0 - start_time
        distance_in_cm = total_time/58;

    }

    TA0CTL &= TAIFG;
}

int main(void){
    DCOCTL = 0;
    BCSCTL1 = CALBC1_1MHZ;     //submain clock 1 MHZ
    DCOCTL = CALDCO_1MHZ;
    WDTCTL = WDTPW | WDTHOLD;   // stop watchdog timer

    TA0CTL = TASSEL_2 | ID_3 | MC_2 | TAIE;
    TA0CCR0 = 100;
    //   TASSEL_2 = Timer A clock source select : 2 - SMCLK
    //   ID_3 = Timer A input divider : 3 - 100*8 = 800 microseconds = 0,0008 seconds
    //   MC_2 = Timer A mode control : 2 - Continous up
    //   enable timer interrupt

    __enable_interrupt();
    P1DIR &= ~(1<<1); //echo pin
    P1DIR |= 1; //trig pin
    P1OUT &= ~1;
    P2DIR |= 1<<2;
    P2OUT &= ~(1<<2);

    P2DIR |= (1<<2 | 1<<3 | 1<<4 | 1<<5 | 1<<6 | 1<<7);
    P2OUT &= ~(1<<2 | 1<<3 | 1<<4 | 1<<5 | 1<<6 | 1<<7);
    P1IE |= 1<<1;
    P1IES &= ~1<<1;

    while(1){
        rising_edge = 1; //after pulse has been send rising_edge = 1, TACCR0 detects rising and falling edges
        turn_on_timer();
        __delay_cycles(10); //wait 10 microseconds
        turn_off_timer();
        __delay_cycles(60000); // wait long enough for the interrupt service routine to kick in. 60000 microseconds = 0,06 seconds
        TA0CTL |= TAIFG;
    }

    rising_edge != rising_edge; //after this, the rising_edge needs to be the opposite as it was
    if(distance_in_cm > 32){
        P2OUT |= 1<<3;
    }else if(distance_in_cm < 32 && distance_in_cm > 25){
        P2OUT |= 1<<4;
    }else if(distance_in_cm < 25 && distance_in_cm > 20){
        P2OUT |= 1<<5;
    }else if(distance_in_cm < 20 && distance_in_cm > 15){
            P2OUT |= 1<<6;
    }else if(distance_in_cm < 15 && distance_in_cm > 10){
        P2OUT |= 1<<7;
    }

    while(1);
}