Macro-Based Register Config Helper

Code

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

// Define macros here

#define ENABLE 0U
#define MODE 1U
#define SPEED 3U

#define SET_ENABLE(REG,VAL)     (REG |= (VAL<<ENABLE))
#define SET_MODE(REG,VAL)       (REG |= (VAL<<MODE))
#define SET_SPEED(REG,VAL)      (REG |= (VAL<<SPEED))



uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    // Use macros to set fields
    uint16_t reg =0;

    SET_ENABLE(reg,enable);
    SET_MODE(reg,mode);
    SET_SPEED(reg,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