mikrokontrollersystemer-prosjekt/prosjekt.X/voltage.c

#include "voltage.h"
#include "uart.h"

void ADC0_init(void) {
    /* Initializing ADC0 pin*/
    /*Voltage reading on pin pd6*/ 
    PORTD.PIN6CTRL &= ~PORT_ISC_gm;
    PORTD.PIN6CTRL |= PORT_ISC_INPUT_DISABLE_gc; /* Disable  */
    PORTD.PIN6CTRL &= PORT_PULLUPEN_bm;
    
    /* Voltage reading T2 */
    PORTD.PIN2CTRL &= ~PORT_ISC_gm;
    PORTD.PIN2CTRL |= PORT_ISC_INPUT_DISABLE_gc; /* Disable  */
    PORTD.PIN2CTRL &= PORT_PULLUPEN_bm;
    
    /* Voltage reading T1 */
    PORTD.PIN1CTRL &= ~PORT_ISC_gm;
    PORTD.PIN1CTRL |= PORT_ISC_INPUT_DISABLE_gc; /* Disable  */
    PORTD.PIN1CTRL &= 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;
}

uint16_t photodiode_voltage_read() {
    /* Gets value for the diode */
    uint8_t adcVal = ADC0_read();

    return adcVal;
}

uint16_t internal_voltage_read() {
    /* Gets value for the internal voltage reffreance*/

    VREF.ADC0REF = VREF_REFSEL_VDD_gc;
}