89 lines
1.2 KiB
NASM
89 lines
1.2 KiB
NASM
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.equ PINA = 0x00 ; d<>finition des adresses des ports
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.equ DDRA = 0x01
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.equ PORTA = 0x02
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.equ RAMEND = 0x21FF
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.equ SPH = 0x3E ; initialisation de la pile
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.equ SPL = 0x3D
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.equ SREG = 0x3F
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.equ ADMUX = 0x7C
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.equ ADCSRB = 0x7B
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.equ ADCSRA = 0x7A
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.equ ADCH = 0x79
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.equ ADCL = 0x78
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.org 0x000
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; Vecteur RESET
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jmp debut
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.org 0x003A
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jmp irqadc
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.org 0x0080
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codeAff:
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.db 0b1111110, 0b001100
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.db 0b0110111, 0b0011111
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.db 0b1001101, 0b1011011
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.db 0b1111011, 0b0001110
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.db 0b1111111, 0b1011111
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debut:
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ldi r28, low(RAMEND)
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ldi r29, high(RAMEND)
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out SPL, r28
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out SPH, r29
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; DDRA@IO <- 0xFF
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LDI R16,0xFF
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OUT DDRA,R16
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; ADMUX <- 0b01100000
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LDI R16,0b01100000
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STS ADMUX,R16
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; ADCSRB <- 0b00000000
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LDI R16,0b00000000
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STS ADCSRB,R16
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; ADCSRA <- 0b11101111
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LDI R16,0b11101111
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STS ADCSRA,R16
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sei
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boucle:
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sleep
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jmp boucle
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irqadc:
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; PORTA@IO <- codeAff@ROM[ADCH/27]
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LDS R16,ADCH
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LDI R17,27
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SER R18
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eti0:
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INC R18
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SUB R16,R17
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BRCC eti0
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MOV R16,R18
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LDI R30,low(codeAff<<1)
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LDI R31,high(codeAff<<1)
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CLR R17
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ADD R30,R16
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ADC R31,R17
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LPM R16,Z
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OUT PORTA,R16
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reti
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