Got ps2avrGB to work with the V-USB protocol
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19 changed files with 886 additions and 17 deletions
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@ -29,25 +29,35 @@ volatile uint32_t timer_count;
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void timer_init(void)
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{
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// Timer0 CTC mode
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TCCR0A = 0x02;
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#if TIMER_PRESCALER == 1
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TCCR0B = 0x01;
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uint8_t prescaler = 0x01;
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#elif TIMER_PRESCALER == 8
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TCCR0B = 0x02;
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uint8_t prescaler = 0x02;
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#elif TIMER_PRESCALER == 64
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TCCR0B = 0x03;
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uint8_t prescaler = 0x03;
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#elif TIMER_PRESCALER == 256
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TCCR0B = 0x04;
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uint8_t prescaler = 0x04;
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#elif TIMER_PRESCALER == 1024
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TCCR0B = 0x05;
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uint8_t prescaler = 0x05;
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#else
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# error "Timer prescaler value is NOT vaild."
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#endif
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#ifndef __AVR_ATmega32A__
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// Timer0 CTC mode
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TCCR0A = 0x02;
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TCCR0B = prescaler;
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OCR0A = TIMER_RAW_TOP;
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TIMSK0 = (1<<OCIE0A);
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#else
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// Timer0 CTC mode
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TCCR0 = (1 << WGM01) | prescaler;
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OCR0 = TIMER_RAW_TOP;
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TIMSK = (1 << OCIE0);
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#endif
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}
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inline
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@ -107,7 +117,12 @@ uint32_t timer_elapsed32(uint32_t last)
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}
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// excecuted once per 1ms.(excess for just timer count?)
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ISR(TIMER0_COMPA_vect)
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#ifndef __AVR_ATmega32A__
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#define TIMER_INTERRUPT_VECTOR TIMER0_COMPA_vect
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#else
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#define TIMER_INTERRUPT_VECTOR TIMER0_COMP_vect
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#endif
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ISR(TIMER_INTERRUPT_VECTOR, ISR_NOBLOCK)
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{
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timer_count++;
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}
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