Macro-Based Register Config Helper

Code

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

#define SET_ENABLE(x) ((x & 0x01) <<0)
#define SET_MODE(x)  ((x& 0x03)<<1)
#define SET_SPEED(x) ((x&0x07)<<3)


uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) 
{
  uint16_t reg= 0;
  reg = reg | SET_ENABLE(enable);
  reg = reg | SET_MODE(mode);
  reg = reg | SET_SPEED(speed);
    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