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.org 0x000
jmp Reset
.org 0x002
jmp Ext_int0
.org 0x02A //wymusza nastepna dyrektwe, adres z poza puli wektorow
Reset:
CLI //wylaczenie przerwan
LDI R16,HIGH(RAMEND)
OUT SPH,R16
LDI R16,LOW(RAMEND)
OUT SPL,R16 //inicjalizacja stosu
//konfiguracja
LDI R31,0b0000001
SBI DDRA,7 //ustawiam kropke z 7-segmentowego na wyjscie
LDI R23,0xff //rejestr 23 same jedynki
OUT DDRC,r23 //obsluga diod zeby wszystkie byly na wyjsciu
//OUT PORTC,R23
CBI DDRD, 2 //linia 2 portu d w trybie wejscia
SBI PORTD,2 //podciagnaie lini
LDI R16, (1<<ISC01) //ustawienie przerwań zewnętrnych
OUT MCUCR, R16
LDI R16, (1<<INT0)
OUT GICR, R16
LDI R23, 0 //wyzerowanie R23
sei //wlaczenie przerwan
;main
main:
SBI PORTA,7
call delay
CBI PORTA,7
call delay
rjmp main
delay:
ldi r18, 130
ldi r19, 222
L1: dec r19
brne L1
dec r18
brne L1
nop
ret
Ext_int0:
// call int0delay
// SBIC PIND,PIND2 //jezeli puszczono przycisk to zwieksz rejestr
INC R23 //inkrementacja rejestru //nie ma potrzeby zerowania bo
//po przekroczeniu granicy wyzeruje sie samo (overflow)
OUT PORTC,R23 //obsluga diod (zapalenie)
reti
int0delay:
ldi r18, 130
ldi r19, 222
L2: dec r19
brne L2
dec r18
brne L2
nop
ret
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