Macro-Based Register Config Helper

Code

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

// Define macros here
#define SET_ENABLE_BIT(reg, enable) (reg = reg | enable)
#define SET_MODE_FIELD(reg, mode) (reg = reg | (mode << 1))
#define SET_SPEED_FIELD(reg, speed) (reg = reg | (speed << 3))

uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed)
{
    uint16_t control_register = 0;
    SET_ENABLE_BIT(control_register,enable);
    SET_MODE_FIELD(control_register,mode);
    SET_SPEED_FIELD(control_register,speed);
    return control_register;
}

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