Decode Status Register into Human-Readable Flags

Code

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

#define BIT_PRINT(r, b, s) if(r & (1 << b)) printf("%s\n", s)

void decode_status(uint8_t status_reg) {
    BIT_PRINT(status_reg, 0, "Power On");
    BIT_PRINT(status_reg, 1, "Error");
    BIT_PRINT(status_reg, 2, "Tx Ready");
    BIT_PRINT(status_reg, 3, "Rx Ready");
    BIT_PRINT(status_reg, 4, "Overheat");
    BIT_PRINT(status_reg, 5, "Undervoltage");
    BIT_PRINT(status_reg, 6, "Timeout");
    BIT_PRINT(status_reg, 7, "Reserved");
}

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

Solving Approach