Macro-Based Register Config Helper

Code

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

// Define macros here
#define ENABLE(reg,x) (reg|(x<<0)) 
#define MODE(reg,x) (reg|(x<<1))
#define SPEED(reg,x) (reg|(x<<3))

uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    // Use macros to set fields
    uint16_t register_val = 0;

    register_val = ENABLE(register_val,enable);
    register_val = MODE(register_val,mode);
    register_val = SPEED(register_val,speed);

    return register_val;
}

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