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54 lines
985 B
54 lines
985 B
10 years ago
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.device attiny13
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.def CNT=r25
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.def LED=r24
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.org 0x0000 ;zacatek kodu
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RJMP RESET ;skok na start po resetu
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.org 0x0010
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RESET:
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LDI r16,low(RAMEND) ;nastavi stack pointer
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OUT SPL,r16
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CLI ;zakazat vsechna preruseni
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LDI LED,0
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LDI r16,0b11111110 ;PB2 je vystupni, PB0 vstupni
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OUT DDRB,r16
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LDI r16,0 ;vypnout PullUp
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OUT PORTB,r16
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LOOP:
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IN r16,PINB ;dej do r16 stav PINB
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ANDI r16,0b00000001
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CPI r16,1 ;neni-li to 1, jdi na STORNO
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BRNE STORNO
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INC CNT ;CNT+1
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CPI CNT,50 ;neni-li CNT=100, jdi na LOOP
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BRNE LOOP
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IN r16,PORTB ;r16=PORTB (vystupni port)
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LDI r17,0b00000100 ;vyxoruj r16 s 0b00000100
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EOR r16,R17
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OUT PORTB,R16 ;a vysledek dej na PORTB
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KONEC:
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IN r16,PINB ;cekani na vstup nuly do PINB0
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ANDI r16,0b00000001
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CPI r16,0
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BRNE KONEC ;neni-li r16=0, jdi na KONEC
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RJMP LOOP ;jdi na LOOP
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STORNO:
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LDI CNT,0 ;do CNT dej 0
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RJMP LOOP ;jdi na LOOP
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