Macro-Based Register Config Helper

Code

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

// Define macros here
#define SET_BIT(a, v, p) ((a)|=((v) << (p)))

uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    // Use macros to set fields
    uint16_t mask = 0x00;
    SET_BIT(mask, enable, 0);
    SET_BIT(mask, mode, 1);
    SET_BIT(mask, speed, 3);
    
    return mask;
}

int main() {
    uint8_t enable, mode, speed;
    scanf("%hhu %hhu %hhu", &enable, &mode, &speed);

    uint16_t reg = build_register(enable, mode, speed);
    printf("%u", reg);
    return 0;
}

Solving Approach