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Kód: Vybrat vše

#include <avr/io.h>

uint16_t teplota;

// measure internal temperature of ATtiny202 in °C
int16_t measure_internal_temperature() {
    // setup ADC to measure temperature
    VREF.CTRLA = VREF_ADC0REFSEL_1V1_gc;
    ADC0.CTRLC = ADC_PRESC_DIV4_gc | ADC_REFSEL_INTREF_gc | ADC_SAMPCAP_bm;
    ADC0.MUXPOS = ADC_MUXPOS_TEMPSENSE_gc;
    ADC0.CTRLD = ADC_INITDLY_DLY32_gc;
    ADC0.SAMPCTRL = 25; // 32E-6 / (1/(3333333/4)) - 2
    ADC0.CTRLA = ADC_ENABLE_bm;
    ADC0.COMMAND = ADC_STCONV_bm;
    while (!(ADC0.INTFLAGS & ADC_RESRDY_bm));
    // calculate T in °C
    int8_t sigrow_offset = SIGROW.TEMPSENSE1;
    uint8_t sigrow_gain = SIGROW.TEMPSENSE0;
    int32_t tmp = ADC0.RES - sigrow_offset;
    tmp *= sigrow_gain;
    tmp += 0x80;
    tmp >>= 8;
    tmp -= 273; // °K to °C
    ADC0.CTRLA = 0; // disable ADC
    return ((int16_t) tmp);
}

int main(void) {
    /* Replace with your application code */

    teplota = measure_internal_temperature();
    asm ("nop");
    
    while (1) {
    }
}