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67 lines
1.1 KiB
67 lines
1.1 KiB
10 years ago
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;tohle ceka az bude na PB0 dlouho jednicka a pak invertuje PB1 a ceka na nulu na PB0
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.device attiny13
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.def cnt=r19
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.org 0x0000 ;RESET
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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 r16,0b00011110 ;smer portu
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out DDRB,r16
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ldi r16,0
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out PORTB,r16
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clr r16
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clr r17
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clr r18
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clr cnt
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sei ;Global Interrupt Enable
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LOOP: ;cekam na 0
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in r16,PINB
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sbrs r16,0
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rjmp pinset
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rjmp LOOP
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pinset: ;cekej, az bude hodne cyklu po sobe 0 na PB0
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clr cnt
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pinset2:
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clr r20
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pinset2b:
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clr r21
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pinset2c:
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in r16,PINB
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sbrc r16,0
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rjmp loop
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inc r21
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cpi r21,2
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brne pinset2c
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inc r20
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cpi r20,255
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brne pinset2b
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inc cnt
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cpi cnt,255
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brne pinset2
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sbi PINB,1 ;invertuj to co je na PB1
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odrus0: ;cekam na 1
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in r16,PINB
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sbrc r16,0
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rjmp w2
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rjmp odrus0
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w2: ;cekani pro odruseni zakmitu
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inc cnt
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cpi cnt,255
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brne w2
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rjmp LOOP ;skok na loop
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