Macro-Based Register Config Helper

Code

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

#define SET_ENABLE(val, enable) ( val |= (enable << 0))
#define SET_MODE(val, mode) (val |= (mode << 1))
#define SET_SPEED(val, speed) (val |= (speed << 3))

// Define macros here

uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    // Use macros to set fields
    uint16_t uhRes = 0;
    SET_ENABLE(uhRes, enable);
    SET_MODE(uhRes, mode);
    SET_SPEED(uhRes, speed);


    return uhRes;
}

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