Macro-Based Register Config Helper

Code

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

// Define macros here
#define ENABLEBIT(val) ((val & 0x1)<<0) ;
#define MODEBIT(val) ((val & 0x3)<<1) ;
#define SPEEDBIT(val) ((val & 0x7)<<3) ;



uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    // Use macros to set fields
    uint16_t reg=0;
    reg |= ENABLEBIT(enable);
    reg |= MODEBIT(mode);
    reg |= SPEEDBIT(speed);
    return reg;
}

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