Macro-Based Register Config Helper

Code

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

// Define macros here

#define SET_BIT_1(REG,EVENT) REG |= (EVENT & 0x01) 
#define SET_BIT_2(REG,EVENT) REG |= ((EVENT & 0x03)<<1)
#define SET_BIT_3(REG,EVENT) REG |= ((EVENT & 0x07) << 3)  

uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    // Use macros to set fields
    uint16_t result = 0;
    SET_BIT_1(result,enable);
    SET_BIT_2(result,mode);
    SET_BIT_3(result,speed);
    return result;
}

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