Код: Выделить всё
.include "m16def.inc"
; Registers aliases - для удобства восприятия
.def A = r16
.def ctrl = r17 ; здесь маска включенных светодиодов (0xff - включены все)
.def bright = r18 ; это яркость (скважность ШИМ)
.cseg
; Interrupt vectors
.org 0x0 ;Reset Vector
rjmp Reset
.org INT0addr ; External Interrupt Request 0
reti
.org INT1addr ; External Interrupt Request 1
reti
.org OC2addr ; Timer/Counter2 Compare Match
reti
.org OVF2addr ; Timer/Counter2 Overflow
reti
.org ICP1addr ; Timer/Counter1 Capture Event
reti
.org OC1Aaddr ; Timer/Counter1 Compare Match A
reti
.org OC1Baddr ; Timer/Counter1 Compare Match B
reti
.org OVF1addr ; Timer/Counter1 Overflow
reti
.org OVF0addr ; Timer/Counter0 Overflow
rjmp OVF0_int
.org SPIaddr ; Serial Transfer Complete
reti
.org URXCaddr ; USART, Rx Complete
reti
.org UDREaddr ; USART Data Register Empty
reti
.org UTXCaddr ; USART, Tx Complete
reti
.org ADCCaddr ; ADC Conversion Complete
reti
.org ERDYaddr ; EEPROM Ready
reti
.org ACIaddr ; Analog Comparator
reti
.org TWIaddr ; 2-wire Serial Interface
reti
.org INT2addr ; External Interrupt Request 2
reti
.org OC0addr ; Timer/Counter0 Compare Match
rjmp OC0_int
.org SPMRaddr ; Store Program Memory Ready
reti
Reset:
; set Stack Pointer to top of RAM
ldi A, high(RAMEND)
out SPH, A
ldi A, low(RAMEND)
out SPL, A
; initialize consts
clr r0 ; r0 = 0
clr r1
dec r1 ; r1 = 0xFF
; I/O setup
out DDRA, r1 ; set all PORTA lines as output (DDRA=0xFF)
out PORTA, r0 ;
; timer0 setup
ldi A,(1<<OCIE0)|(1<<TOIE0) ; enable timer1 interrupts
out TIMSK, A
; clear timer0 counter
out TCNT0, r0
; set 50% PWM
ldi bright, 0x7F
out OCR0, bright
; set timer0 to Fast PWM mode
ldi A, (1<<WGM01)|(1<<WGM00)|(1<<CS01)
out TCCR0, A ; Start timer0, prescaler=8
sei ; enable interrupts
ser ctrl ; switch-on all LEDs
; main loop
loop: nop
; здесь пишем остальной код - проверка нажатия кнопок, реакция на кнопки итд
rjmp loop
OVF0_int:
in r2, SREG ; save status
out PORTA, ctrl ; set all PA lines to ctrl
out SREG, r2 ; restore status
reti
OC0_int:
in r2, SREG ; save status
out PORTA, r0 ; set all PA lines to 0
out SREG, r2 ; restore status
reti
