Measure PWM Duty Cycle with Pic

Question

I am trying to measure two PWM input signals and, based on them, turn a LED on or off. I am using a PIC16F18313 microcontroller.
I have a Futaba remote control, and through its receiver, I receive two PWM signals when toggling a switch. One signal has a pulse width of 1 ms, and the other has a pulse width of 1.5 ms. Both signals are fed into the RA2 pin. I want to turn off the LED when the input PWM is 1 ms and turn it on when the input PWM is 1.5 ms.

#include <xc.h>
#include <pic16f18313.h>

#pragma config FEXTOSC = OFF
#pragma config RSTOSC = HFINT1
#pragma config WDTE = OFF
#pragma config MCLRE = OFF

#define _XTAL_FREQ 4000000

volatile unsigned int time_diff = 0;
volatile unsigned int prev_capture = 0;
volatile unsigned int capture_value = 0;
volatile unsigned char edge_flag = 0;

void __interrupt() ISR(void) {
    if (PIR4bits.CCP1IF) {
        PIR4bits.CCP1IF = 0;
        capture_value = (CCPR1H << 8) | CCPR1L;

        if (RA2 == 1 && edge_flag == 0) {
            prev_capture = capture_value;
            edge_flag = 1;
            CCP1CON = 0b00000101;
        } else if (RA2 == 0 && edge_flag == 1) {
            time_diff = capture_value - prev_capture;
            edge_flag = 0;
            CCP1CON = 0b00000111;

            if (time_diff >= 850 && time_diff <= 1150) {
                LATA4 = 0;
            } else if (time_diff >= 1350 && time_diff <= 1650) {
                LATA4 = 1;
            }
        }
    }
}

void main(void) {
    OSCFRQ = 0x03;
    TRISA2 = 1;
    TRISA4 = 0;
    ANSELA = 0;
    T1CON = 0b00110001;
    CCP1CON = 0b00000101;
    CCP1EN = 1;
    PIR4bits.CCP1IF = 0;
    PIE4bits.CCP1IE = 1;
    INTCONbits.GIE = 1;

    while (1);
}