36 lines
562 B
C
36 lines
562 B
C
#include "adc.h"
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uint16_t readADC(uint8_t channel) {
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uint16_t result;
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uint8_t i;
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//ADC aktiv, Prescaler 16
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ADCSRA = (1 << ADEN) | (1 << ADPS2);
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//ADC0 kein mutiplexing
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ADMUX = channel;
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// AVcc als Versorgungspannung
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ADMUX |= (1 << REFS0);
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//ADC starten mit Dummyreadout
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ADCSRA |= (1 << ADSC);
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while(ADCSRA & (1 << ADSC));
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result = 0;
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for(i = 0; i < ADC_READ_CYCELS; i++) {
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ADCSRA |= (1 << ADSC);
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while(ADCSRA & (1 << ADSC));
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result += ADCW / ADC_READ_CYCELS;
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_delay_us(1);
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}
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//ADC aus
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ADCSRA &= ~(1 << ADEN);
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return result;
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}
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