example_avr.asm

example_avr.asm

; ===== Registerlarni belgilash =====
.equ DDRD   = 0x2A
.equ DDRB   = 0x24
.equ PORTB  = 0x25
.equ PIND   = 0x29

; ===== Asosiy dastur =====
.org 0x0000 ; Dasturning boshlang‘ich nuqtasi
rjmp RESET ; Portlarni sozlash uchn reset sektoriga o‘tish

RESET:
    ; 1. Kirish va chiqish portlarini sozlash
    ldi r16, 0b00000000      ; PD2, PD3 kirish (boshqa bitlar ham 0)
    out DDRD, r16

    ldi r16, 0b00000011      ; PB0 va PB1 chiqish
    out DDRB, r16

MAIN_LOOP:
    ; 2. Kirish holatini o‘qish
    in r17, PIND             ; PD2 = bit2, PD3 = bit3

    ; 3. Faqat PD2 va PD3 ni izolyatsiya qilish (bit mask)
    andi r17, 0b00001100     ; faqat 3-chi va 2-chi bitlar

    ; 4. Chiqish qiymatini tayyorlash
    clr r18                  ; r18 = 0 → chiqish portga yuboriladi

    ; Agar PD2 (bit 2) = 1 bo‘lsa → PB0 = 1
    sbrc r17, 2              ; tozalangan bitni o‘tkazish yuborish
    ori r18, 0b00000001      ; PB0 = 1

    ; Agar PD3 (bit 3) = 1 bo‘lsa → PB1 = 1
    sbrc r17, 3
    ori r18, 0b00000010      ; PB1 = 1

    ; 5. PORTB ga natijani yuborish
    out PORTB, r18

    rjmp MAIN_LOOP           ; takrorlash