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 a = 0;
    if(enable & (1<<0))
        a |= 1;
    for(int i = 0;i<2;i++)
        if(mode & (1<<i))
            a |= (1<<(i+1));
    for(int j = 0; j<3;j++)
        if(speed & (1<<j))
            a |= (1<<(j+3));
    
    return a;
}

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