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88 lines
1.3 KiB
88 lines
1.3 KiB
10 years ago
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;pracuje jako 5-ti bitovy binarni citac
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;vystupy 3 a 4 jsou prohozene kvuli desce
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.device attiny13
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.def cnt=r18
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.def cm0=r19
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.def cm1=r20
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.def cm2=r21
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.def chc=r22
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.def dirs=r23
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.org 0x0000 ;RESET
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RJMP RESET ;skok na start po resetu
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.org 0x0006 ;TC0 overflow
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RJMP CASOVAC
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.org 0x0007
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rjmp casovac
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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 r16,0b00011111 ;výstupní = 1
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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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ldi r16,0b00000011 ;TC0 prescaler na 64
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out TCCR0B,r16 ;4800000/32
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ldi r16,0b00000010 ;TC0 je v rezimu CTC
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out TCCR0A,r16
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ldi r16,20 ;overflow 22
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out OCR0A,r16 ;
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in r16, TIMSK0 ;interrupt enable
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ORI r16, 0b00000100
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out timsk0,r16
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ldi cm0,32 ;R
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ldi cm1,16 ;G
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ldi cm2,0 ;B
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clr cnt
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clr chc
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ldi dirs,0b00000000
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sei ;zapnout globalne interrupt
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LOOP:
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rjmp LOOP ;skok na loop
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CASOVAC:
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inc cnt
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cpi cnt,32
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brne nov
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clr cnt
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cbi portb,0
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cbi portb,1
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cbi portb,2
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inc chc
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cpi chc,255
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brne nov
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nov:
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cp cnt,cm0
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brne not0
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sbi portb,0
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not0: cp cnt,cm1
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brne not1
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sbi portb,1
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not1: cp cnt,cm2
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brne not2
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sbi portb,2
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not2:
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CASEND:
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reti
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