Macro-Based Register Config Helper

Code

#include <stdio.h>
#include <stdint.h>
#define REG_SET_ENABLE(val)   (((val) & 0b00000001) << 0)
#define REG_SET_MODE(val)     (((val) & 0b00000011) << 1)
#define REG_SET_SPEED(val)    (((val) & 0b00000111) << 3)
uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) 
{
        return   
          REG_SET_ENABLE(enable) |
          REG_SET_MODE(mode) |
          REG_SET_SPEED(speed);
}

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