25. Pack Multiple Fields into a 16-bit Control Register

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

uint16_t pack_register(uint8_t mode, uint8_t speed, uint8_t status) {
    uint16_t temp = status;

    temp <<= 2;      // shift mode by 5 bits
    

    temp <<= 5;      // shift combined value by 8 bits
    temp += speed;
    temp<<=3;
     temp+=mode;
    return temp;
}

int main() {
    uint8_t mode, speed, status;

    scanf("%hhu %hhu %hhu", &mode, &speed, &status);

    uint16_t reg = pack_register(mode, speed, status);

    printf("%u", reg);

    return 0;
}