Macro-Based Register Config Helper

Code

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


// Define macros here
#define ENABLE(val) (((val) & (0x01)) << 0 );
#define SET_MODE(val) (((val) & (0x03)) << 1);
#define SET_SPEED(val) (((val) & (0x07)) << 3 );

uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    // Use macros to set fields

    uint16_t reg = 0;
    reg |= ENABLE(enable);
    reg |= SET_MODE(mode);
    reg |= SET_SPEED(speed);
    
    return reg;

    
}

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