95 lines
1.7 KiB
Plaintext
95 lines
1.7 KiB
Plaintext
.equ PINA = 0x00 ; définition des adresses des ports
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.equ DDRA = 0x01
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.equ PORTA = 0x02
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.equ PINC = 0x06
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.equ DDRC = 0x07
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.equ PORTC = 0x08
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.equ RAMEND = 0x21FF
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.equ SPH = 0x3E
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.equ SPL = 0x3D
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.equ SREG = 0x3F
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.equ TCCR0A = 0x24
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.equ TCCR0B = 0x25
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.equ TIMSK0 = 0x6E
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.equ TIFR0 = 0x35
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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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.def d2 = r19
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.def d1 = r20
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.def d0 = r21
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.def select = r22
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.def temp = r23
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.org 0x000
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; Vecteur RESET
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jmp debut
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.org 0x002E ; Interruption du timer
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jmp tm
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.org 0x003A ; Interruption de l'ADC
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jmp irqadc
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.org 0x0080
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codeAff: ; Représentation des chiffres sur l'afficheur 7-segments
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.db 0b1111110, 0b001100, 0b0110111, 0b0011111, 0b1001101, 0b1011011, 0b1111011, 0b0001110, 0b1111111, 0b1011111
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debut:
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; Initialisation de la pile
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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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cli
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DDRA@IO <- 0xFF
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DDRC@IO <- 0xFF
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ADMUX <- 0b01100001 ; Sélection de l'ADC1
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ADCSRB <- 0b00000000 ; Free-running mode
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ADCSRA <- 0b11101111 ; Activation des interruptions
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; Timer toutes les 2 ms
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TCCR0A@IO <- 0x00
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TCCR0B@IO <- 0x04
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TIMSK0 <- 0x01
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TIFR0 <- 0x01
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sei
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d2 <- 1
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d1 <- 2
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d0 <- 3
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select <- 0b00100000
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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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temp <- ADCH
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d2 <- temp / 100
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d1 <- temp / 10 - (temp / 100) * 10
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d0 <- temp - temp/10*10
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reti
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tm:
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PortC@IO <- select
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si select = 0b10000000 alors PortA@IO <- codeAff@ROM[d2]
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si select = 0b01000000 alors PortA@IO <- codeAff@ROM[d1]
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si select = 0b00100000 alors PortA@IO <- codeAff@ROM[d0]
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lsl select
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si select = 0 alors select <- 0b00100000
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reti
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