Lab 2 - Task 2.4 + 7 Segment

#include<p18F4550.inc>

CONFIG FOSC = HS ; H oscillator, HS used by USB
CONFIG WDT = OFF ; HW disabled - SW Controlled ( deactivation des watchdog timer)
CONFIG DEBUG = OFF
CONFIG MCLRE = OFF ;
CONFIG CPUDIV = OSC1_PLL2
CONFIG PBADEN = OFF

counter_value equ H'04'


RES_VECTOR CODE 0x0000;
goto init

org 0x0008 ; interrupt vector at PM address 0x0008
goto irq_handle ; go to the function for the

 INT0_interrupt
    bcf INTCON , INT0IF ; clear the flag

    bsf PORTC, RC0
    retfie

irq_handle ; --- interrupt routine
    btfsc INTCON , INT0IF
    goto INT0_interrupt ; yes , it is TMR0
    retfie ; --- no , return from interrupt

MAIN_PROG CODE

init
    clrf TRISC ; set PORTC as output
    clrf PORTC ; clear PORTC

    setf TRISB ;
    clrf PORTB ; clear PORTB

    bsf INTCON , GIE ; activate interrupts
    bsf INTCON , INT0IE ; activate external interrupt
    bsf INTCON, INTEDG0 ; interrupt on rising edge
    goto main_loop


main_loop
    bcf PORTC, RC0;
    goto main_loop ; push skipped

END