AVR A/D example.c

Jednoduchý prevod na vyžiadanie:

#include <avr/io.h>

void adc_init(void);                                   // A/D converter initialization

int main(void)
{
  unsigned int buffer;

  adc_init();                                          // Init A/D converter

  while (1)
  {
    ADCSRA |= (1<<ADSC);                               // Start A/D conversion
    while ( !(ADCSRA & (1<<ADIF)));                    // Wait until AD not finished
    buffer = ADC;                                      // Then, read result (ADCH<<8) | ADCL)
  }

}


void adc_init(void)                                    // A/D converter initialization
{
  ADMUX = 0b01000100;                                  // Ref: external, Channel 4 (ADC4) - NTC
  ADCSRA = (1<<ADEN)|(1<<ADPS2)|(1<<ADPS1)|(1<<ADPS0); // =0b10000111, A/D ON, prescaler = 128 
}

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