Macro-Based Register Config Helper

Code

#include <stdio.h>
#include <stdint.h>
   #define SET_ENABLE(x) ((uint16_t)(x & 0x1)<<0);
#define SET_MODE(x) ((uint16_t)(x & 0x3)<<1);
#define SET_SPEED(x) ((uint16_t)(x & 0x7)<<3);

// Define macros here

uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    // Use macros to set fields
  uint16_t reg=0;
  reg |=SET_ENABLE(enable);
  reg |=SET_MODE(mode);
  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