Macro-Based Register Config Helper

Code

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

// Define macros here 

uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    // Use macros to set fields
    uint8_t temp = 0;
    temp = temp | (enable & 0x01) << 0 | (mode & 0x03) << 1 | (speed & 0x07) << 3;
    uint16_t a = (uint16_t) temp;
    return a;
}

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