Macro-Based Register Config Helper

Code

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

// Define macros here
#define SetMode(reg,n) ((reg)|=(n<<(1)))
#define SetEN(reg,n) ((reg)|=(n<<(0)))
#define SetSPEED(reg,n) ((reg)|=(n<<(3)))
#define SetRE(reg,n) ((reg)&=~(n<<(6)))

uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    // Use macros to set fields
    uint16_t Current_reg=0;
    
    SetEN(Current_reg,enable);
    SetMode(Current_reg,mode);
    SetSPEED(Current_reg,speed);
    SetRE(Current_reg,2);
    return Current_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