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RTT_Config.hh
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#ifndef COSA_RTT_CONFIG_HH
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#define COSA_RTT_CONFIG_HH
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// Real-Time Timer Configuration
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#define COUNT 250
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#define PRESCALE 64
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#define TIMER_MAX (COUNT - 1)
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#define US_PER_TIMER_CYCLE (PRESCALE / I_CPU)
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#define US_PER_TICK (COUNT * US_PER_TIMER_CYCLE)
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#define MS_PER_TICK (US_PER_TICK / 1000)
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#define US_DIRECT_EXPIRE (800 / I_CPU)
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#define US_TIMER_EXPIRE (US_PER_TICK - 1)
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// Real-Time Timer Registers. Use Timer2 if available to keep
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// timer running in low power mode
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#if defined(TIMER2_COMPA_vect)
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#define timern_enable timer2_enable
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#define timern_disable timer2_disable
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#define TCCRnB TCCR2B
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#define CSn _BV(CS22)
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#define TCCRnA TCCR2A
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#define OCRnA OCR2A
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#define OCRnB OCR2B
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#define TIMSKn TIMSK2
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#define TCNTn TCNT2
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#define TIFRn TIFR2
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#define TIMERn_COMPA_vect TIMER2_COMPA_vect
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#define TIMERn_COMPB_vect TIMER2_COMPB_vect
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#elif defined(TCNT0)
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#define timern_enable timer0_enable
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#define timern_disable timer0_disable
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#define TCCRnB TCCR0B
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#define CSn (_BV(CS01) | _BV(CS00))
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#define TCCRnA TCCR0A
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#define OCRnA OCR0A
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#define OCRnB OCR0B
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#define TIMSKn TIMSK0
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#define TCNTn TCNT0
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#define TIFRn TIFR0
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#define TIMERn_COMPA_vect TIMER0_COMPA_vect
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#define TIMERn_COMPB_vect TIMER0_COMPB_vect
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#endif
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#endif
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RTT_Config.hh
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