19 lines
417 B
C
19 lines
417 B
C
#include "adc.h"
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#include <stdint.h>
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#include <avr/interrupt.h>
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#include <avr/io.h>
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#include <util/delay.h>
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void adc_init() {
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DDRC=0x0; // does not exist but is default?
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ADCSRA = (1<<ADEN)|(1<<ADPS1)|(1<<ADPS2);
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ADMUX = (1<<REFS0);
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}
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uint16_t adc_read(uint8_t channel) {
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ADMUX &= 0xf0;
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ADMUX |= (channel & 0x0f);
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ADCSRA |= (1<<ADSC);
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while((ADCSRA&(1<<ADIF))==0);
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return ADCL + (ADCH << 8);
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}
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