Macro-Based Register Config Helper

Code

#include <stdio.h>
#include <stdint.h>
#define SET_ENABLE(enable) enable
#define SET_MODE(mode) (mode << 1)
#define SET_SPEED(speed) (speed << 3)
uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    uint16_t tmp = 0;
    tmp |= (SET_ENABLE(enable) | SET_MODE(mode) | SET_SPEED(speed));
    return tmp;
}

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