Macro-Based Register Config Helper

Code

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

// Define macros here

#define SET_BIT(Reg, Pos)  Reg |= (1 << pos)
#define CLR_BIT(Reg, Pos)  Reg &= ~(1 << pos)
#define TOGGLE_BIT(Reg, Pos)  Reg ^= (1 << pos)
#define GET_BIT(Reg, Pos)  ((Reg >> pos) & 1)


uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    // Use macros to set fields
    uint16_t reg_val = 0;
    reg_val = (enable << 0) | (mode<< 1) | (speed <<3);

    return reg_val;
}

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