Macro-Based Register Config Helper

Code

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

// Define macros here

uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    // Use macros to set fields
    uint16_t m;
    if(enable==0){
        m &= ~(1<<0);
    }
    else{
        m |= (1<<0);
    }
    for(int i=0;i<2;i++){
        if(mode & (1<<i)){
            m |=(1<<(i+1));
        }
        else{
            m &= ~(1<<(i+1));
        }
    for(int a=0;a<3;a++){
        if(speed & (1<<a)){
            m |=(1<<(a+3));
        }
        else{
            m &= ~(1<<(a+3));
        }
    }
    m &= ~(1<<6);
    m &= ~(1<<7);
    }
    return m;
}

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