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 res=0;
    res |= (enable>>0);
    for(int i=0;i<2;i++)
    {
        uint8_t val=((mode>>i)  & 1);
        res |= (val<<(i+1));
    }
    for (int i=0;i<3;i++)
    {
        uint8_t bit=((speed >> i) & 1);
        res |= (bit<<(i+3));
    }
    return res;
}

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