Macro-Based Register Config Helper

Code

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


#define set_enable(x) ((x&0x1U)<<0)
#define set_mode(x) ((x&0x3U)<<1)
#define set_speed(x) ((x&0x7u)<<3)

uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
  uint8_t reg=0;
  reg|=set_enable(enable)|set_mode(mode)|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