Macro-Based Register Config Helper

Code

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

// Define macros here
#define WRITE_ENABLE(status, b) (status ^= (b))
#define WRITE_MODE(status, b) (status ^= (b<<1))
#define WRITE_SPEED(status, b) (status ^= (b<<3))
#define READ_ENABLE(status) (status%(1<<1))
#define READ_MODE(status) ((status>>1)%(1U<<2))
#define READ_SPEED(status) ((status>>3)%(1U<<3))


uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    // Use macros to set fields
    uint16_t tmp = 0;
    WRITE_ENABLE(tmp, enable);
    WRITE_MODE(tmp, mode);
    WRITE_SPEED(tmp, speed);

    return (tmp);
}

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