71. Decode ADC Result Using Union Bitfields

#include <stdio.h>
#include <stdint.h>

typedef union {

    struct {

        uint16_t adc_value : 12;
        uint16_t channel   : 4;

    };

    uint16_t adc_reg;

} ADC_Result;

int main() {

    uint16_t reg;
    ADC_Result adc;

    scanf("%hx", &reg);

    // Fill union and print channel and adc_value
    adc.adc_reg = reg;

    printf("Channel: %d\n", adc.channel);
    printf("ADC Value: %d", adc.adc_value);


    return 0;
}