33 lines
577 B
C++
33 lines
577 B
C++
#include "adu.h"
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void ADU::init() volatile
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{
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// externe Referenz an AREF
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ADMUX = 0;
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// ADC aktiviert, Interruptbetrieb, prescaler = 128
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ADCSRA = _BV(ADEN) | _BV(ADIE) | _BV(ADPS2) | _BV(ADPS1) | _BV(ADPS0);
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}
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void ADU::handleConversionComplete() volatile
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{
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active = false;
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}
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uint16_t ADU::getValue(uint8_t channel) volatile
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{
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while(active);
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active = true;
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// lege Kanal fest
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ADMUX = (ADMUX & 0xE0) | channel;
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// starte Konvertierung
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ADCSRA |= _BV(ADSC);
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// warte auf Ende der Konvertierung
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while(active);
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return ADCW;
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}
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