Macro-Based Register Config Helper

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

// Define macros here
#define Enable(r,b,c) ((r) |= ((b)&0x01)<<(c))
#define Mode(r,b,c) ((r) |= ((b)&0x03)<<(c))
#define Speed(r,b,c) ((r) |= ((b)&0x07)<<(c))



uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    // Use macros to set fields

    uint16_t love=0;
    Enable(love,enable,0);
    Mode(love,mode,1);
    Speed(love,speed,3);

    return love;
}

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;
}