Macro-Based Register Config Helper

Code

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

// Define macros here
#define REG (enable<<0)|(mode<<1)|(speed<<3)

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

    //Method 1
    // temp |= (enable<<0);
    // temp |= (mode<<1);
    // temp |= (speed<<3);

    //Method 2
    //temp |= (enable<<0)|(mode<<1)|(speed<<3);
    
    //Method 3
    temp |= REG;
    return temp;
}

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