Macro-Based Register Config Helper

Code

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

// Define macros here
#define ENABLE_POS   0
#define MODE_POS     1
#define SPEED_POS    3
// =====================
// Macros để thiết lập giá trị
// =====================
#define SET_ENABLE(val)   ((uint16_t)((val & 0x1U) << ENABLE_POS))
#define SET_MODE(val)     ((uint16_t)((val & 0x3U) << MODE_POS))
#define SET_SPEED(val)    ((uint16_t)((val & 0x7U) << SPEED_POS))


uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    // Use macros to set fields
    uint16_t res = 0;
    res = res | SET_ENABLE(enable) | SET_MODE(mode) | SET_SPEED(speed);
    return res;
}

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