Decode Status Register into Human-Readable Flags

Code

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

typedef struct {
    uint8_t power           :1;
    uint8_t error           :1;
    uint8_t tx_ready        :1;
    uint8_t rx_ready        :1;
    uint8_t overheat        :1;
    uint8_t undervoltage    :1;
    uint8_t timeout         :1;
    uint8_t reserved        :1;
} status;

void decode_status(uint8_t status_reg) {
    status *r = (status *)&status_reg;
    if (r->power) printf("Power On\n");
    if (r->error) printf("Error\n");
    if (r->tx_ready) printf("Tx Ready\n");
    if (r->rx_ready) printf("Rx Ready\n");
    if (r->overheat) printf("Overheat\n");
    if (r->undervoltage) printf("Undervoltage\n");
    if (r->timeout) printf("Timeout\n");
    if (r->reserved) printf("Reserved\n");
    return;
}

int main() {
    uint8_t reg;
    scanf("%hhu", &reg);
    decode_status(reg);
    return 0;
}

Solving Approach