Macro-Based Register Config Helper

Code

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

// Define macros here
#define set_enable(value) ((value & 0x1) << 0)
#define set_mode(value)   ((value & 0x3) << 1) 
#define set_speed(value)  ((value & 0x7) << 3)

// #define get_enable

uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    // Use macros to set fields
    // return 0;
    return set_enable(enable) | set_mode(mode) | 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