Macro-Based Register Config Helper

Code

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

#define SET_MODE(x)         ((0x03 & x) << 1)
#define SET_SPEED(x)        ((0x07 & x) << 3)


uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    uint16_t result = 0;
    result |= (enable << 0);
    result |= SET_MODE(mode);
    result |= SET_SPEED(speed);
    return result;
}

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