Decode Status Register into Human-Readable Flags

Code

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

void decode_status(uint8_t status_reg) {
    const char *flags[] = {
        "Power On",
        "Error",
        "Tx Ready",
        "Rx Ready",
        "Overheat",
        "Undervoltage",
        "Timeout",
        "Reserved",
    };

    for ( int i = 0; i < 8; i++){
        if((status_reg >> i) & 1){
            printf("%s\n", flags[i]);
        }
    }
}

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

Solving Approach

• Store flag names in an array in bit order (0 → 7).
• Loop through all 8 bits (i = 0 to 7).
• Check each bit: (status_reg >> i) & 1
  • If 1 → bit is set → print corresponding flag.
  • If 0 → skip.