mikrokontrollersystemer-prosjekt/prosjekt.X/voltage.c

#include "voltage.h"

void sensor_init(void) {
    /* Disable digital input buffer */
}

void ADC0_init(void) {
    PORTD.PIN6CTRL &= ~PORT_ISC_gm;
    PORTD.PIN6CTRL |= PORT_ISC_INPUT_DISABLE_gc;
    PORTD.PIN6CTRL &= PORT_PULLUPEN_bm;

    ADC0.CTRLC = ADC_PRESC_DIV4_gc;
    VREF.ADC0REF = VREF_REFSEL_VDD_gc; /* Internal reference */
    ADC0.CTRLA = ADC_ENABLE_bm /* ADC Enable: enabled */
            | ADC_RESSEL_10BIT_gc; /* 10-bit mode */
    /* Select ADC channel */
    ADC0.MUXPOS = ADC_MUXPOS_AIN6_gc;
}

uint16_t ADC0_read(void) {
    /* Start ADC conversion */
    ADC0.COMMAND = ADC_STCONV_bm;
    /* Wait until ADC conversion done */
    while (!(ADC0.INTFLAGS & ADC_RESRDY_bm)) {
        ;
    }
    /* Clear the interrupt flag by writing 1: */
    ADC0.INTFLAGS = ADC_RESRDY_bm;
    return ADC0.RES;
}

uint8_t voltage_values(void) {
    uint8_t adcVal = ADC0_read();
    VREF.ADC0REF = VREF_REFSEL_VDD_gc;
    return adcVal;
}