Macro-Based Register Config Helper

Code

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

// Define macros here
#define SET_ENABLE(ena) (ena & 0x3F)
#define SET_MODE(mode) ((mode << 1)& 0x3F)
#define SET_SPEED(speed) ((speed << 3)& 0x3F)


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

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