prac6

#include <xc.h>
#include "config.h"

void setup();
void avansar_led();
void retrocedir_led();


void interrupt low_priority int_low()
{
    if (INTCON3bits.INT2IF) {
        INTCON3bits.INT2IF = 0;
        retrocedir_led();
    }
    return;
}

void interrupt high_priority int_high()
{
    if (INTCON3bits.INT1IF) {
        INTCON3bits.INT1IF = 0;
        avansar_led();
    }
    return;
}


void main(void)
{
    setup();
    while (1) ;
}

void avansar_led()
{
    if (PORTD == 0) {
        PORTD = 1;
    } else {
        PORTD <<= 1;
    }
}

void retrocedir_led()
{
    if (PORTD == 0) {
        PORTD = 0x80;
    } else {
        PORTD >>= 1;
    }
}

void setup()
{
    ADCON1 = 0x0F;
    TRISD = 0x00;
    TRISB = 0xFF;
    PORTD = 0;
    RCONbits.IPEN = 1;
    //Enable all unmasked interrupts
    //Enable all high-priority interrupts
    INTCON = 0b11001000;
    //Enable INT1 and INT2
    INTCON3 = 0b01011000;
}