Decode Status Register into Human-Readable Flags

Code

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

#define FLAG_POWER_ON      (1u << 0)
#define FLAG_ERROR         (1u << 1)
#define FLAG_TX_READY      (1u << 2)
#define FLAG_RX_READY      (1u << 3)
#define FLAG_OVERHEAT      (1u << 4)
#define FLAG_UNDERVOLTAGE  (1u << 5)
#define FLAG_TIMEOUT       (1u << 6)
#define FLAG_RESERVED      (1u << 7)

void decode_status(uint8_t status_reg)
{
    if (status_reg & FLAG_POWER_ON)
        printf("Power On\n");

    if (status_reg & FLAG_ERROR)
        printf("Error\n");

    if (status_reg & FLAG_TX_READY)
        printf("Tx Ready\n");

    if (status_reg & FLAG_RX_READY)
        printf("Rx Ready\n");

    if (status_reg & FLAG_OVERHEAT)
        printf("Overheat\n");

    if (status_reg & FLAG_UNDERVOLTAGE)
        printf("Undervoltage\n");

    if (status_reg & FLAG_TIMEOUT)
        printf("Timeout\n");

    if (status_reg & FLAG_RESERVED)
        printf("Reserved\n");
}


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

Solving Approach