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s6-up-tp/TP3/TP30.asm
2017-05-19 05:49:51 +02:00

82 lines
1.2 KiB
NASM

.equ PINA = 0x00 ; définition des adresses des ports
.equ DDRA = 0x01
.equ PORTA = 0x02
.equ RAMEND = 0x21FF
.equ SPH = 0x3E ; initialisation de la pile
.equ SPL = 0x3D
.equ SREG = 0x3F
.equ ADMUX = 0x7C
.equ ADCSRB = 0x7B
.equ ADCSRA = 0x7A
.equ ADCH = 0x79
.equ ADCL = 0x78
.org 0x000
; Vecteur RESET
jmp debut
.org 0x0080
codeAff:
.db 0b1111110, 0b001100
.db 0b0110111, 0b0011111
.db 0b1001101, 0b1011011
.db 0b1111011, 0b0001110
.db 0b1111111, 0b1011111
debut:
ldi r28, low(RAMEND)
ldi r29, high(RAMEND)
out SPL, r28
out SPH, r29
; DDRA@IO <- 0xFF
LDI R16,0xFF
OUT DDRA,R16
; ADMUX <- 0b01100000
LDI R16,0b01100000
STS ADMUX,R16
; ADCSRB <- 0b00000000
LDI R16,0b00000000
STS ADCSRB,R16
; ADCSRA <- 0b11100111
LDI R16,0b11100111
STS ADCSRA,R16
boucle:
; PORTA@IO <- codeAff@ROM[ADCH/25]
LDS R16,ADCH
LDI R17,25
SER R18
eti0:
INC R18
SUB R16,R17
BRCC eti0
MOV R16,R18
LDI R30,low(codeAff<<1)
LDI R31,high(codeAff<<1)
CLR R17
ADD R30,R16
ADC R31,R17
LPM R16,Z
OUT PORTA,R16
jmp boucle