lab_1_32_with_comments

.include "m64def.inc"

jmp init ;jmp to init procedure
loop: ;chack btn state
sbis pind, 6 ; if btn isn't pressed, then skip next cmd
rcall inc_cnt
jmp loop;

init:
ldi r16, low(ramend)
ldi r17, high(ramend)
out spl, r16
out sph, r17
ldi r16, 0x0F
out ddrc, r16
jmp loop

inc_cnt:
ldi r20, 0x01 ; load 0x01 for increment value into r31 (used as counter for output)
add r31, r20 ;add ones value with our counter value into r31
andi r31, 0x0F ;get bitmsk for counter
out portc, r31 ;get out value into portc
loop_1:  ;check btn for unpressed state
sbic pind, 6;check btn for unpressed stated
ret ;if btn is unpressed, make jmp to the rcall part of code (pc+1)
jmp loop_1 ;if btn is pressed, polling state again