Macro-Based Register Config Helper

Code

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

uint16_t ans = 0;
// Define macros here
#define set_enable(en)    (ans += en)
#define value_mode(mod)   (ans += (mode << 1u))
#define value_speed(sped) (ans += (sped << 3u))



uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    // Use macros to set fields
    set_enable(enable);
    value_mode(mode);
    value_speed(speed);
    return ans;
}

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

didn't work for reserved bits guys