Macro-Based Register Config Helper

Code

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

#define set_ENABLEbit(reg, enable) ((reg) | ((enable)<<0))
#define set_MODEbits(reg, mode) ((reg) | ((mode)<<1))
#define set_SPEEDbits(reg, speed) ((reg) | ((speed)<<3))
#define clear_RESERVEDbits(reg) ((reg) & ~(0b11<<6))

uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    uint16_t reg = 0;
    reg = set_ENABLEbit(reg,enable);
    reg = set_MODEbits(reg,mode);
    reg = set_SPEEDbits(reg,speed);
    reg = clear_RESERVEDbits(reg);
    return reg;
}

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