osci.txt
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.equ PINA = 0x00 ; définition des adresses des ports
.equ DDRA = 0x01
.equ PORTA = 0x02
.equ PINC = 0x06
.equ DDRC = 0x07
.equ PORTC = 0x08
.equ PIND = 0x09
.equ DDRD = 0x0A
.equ PORTD = 0x0B
.equ SREG = 0x3F
.equ EIMSK = 0x3D
.equ EICRA = 0x69
.equ EICRB = 0x6A
.equ TCNT0 = 0x46
.equ OCR0A = 0x47
.equ OCR0B = 0x48
.equ TTCR0A = 0x24
.equ TTCR0B = 0x25
.equ TMSK0 = 0x6e
.equ RAMEND = 0x21FF
.equ SPH = 0x3E ; initialisation de la pile
.equ SPL = 0x3D
.org 0x000
; Vecteur RESET
jmp debut
.org 0x0002 ; INT0
jmp bouton
.org 0x0004 ; INT1
jmp bouton
.org 0x0006 ; INT2
jmp bouton
.org 0x0008 ; INT3
jmp bouton
.org 0x002E ; Timer Overflow
jmp timer
.org 0x0080
afficheur:
.DB 0x3F, 0x30, 0x6D, 0x79, 0x72, 0x5B, 0x5F, 0x31, 0x7F, 0x7B
; 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
debut:
DDRA@IO <- 0xFF
DDRC@IO <- 0xFF
;DDRD@IO <- 0x00
EIMSK <- 0b00001111
EICRA <- 0b10101010 ; TODO Oscillations annulables ?
EICRB <- 0b00000000
; Timer
;TTCR0A@IO <- 0b00000001
;TTCR0B@IO <- 0b00000011
;TMSK0 <- 0b00000011
;OCR0A <- 100
SEI
PORTC@IO <- 0x00
PORTA@IO <- 0x3F
r20 <- 0
boucle:
sleep
saut boucle
valider:
inc r20
si r20 > 9 alors r20 <- 0
PORTA@IO <- afficheur@ROM[r20]
reti
bouton:
;TCNT0 <- 0
jmp valider
reti:
reti
timer:
;si (PORTD@IO & 0x01) = 0 saut valider
;r20 <- PORTC@IO
;inc r20
;PORTC@IO <- r20
;PORTA@IO <- PIND@IO
reti
tca:
reti
tempo:
ldi r24,8
tempoA:
subi r22,1
sbci r23,0
sbci r24,0
brcc tempoA
ret