Macro-Based Register Config Helper

Code

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

// Define macros here
#define SET_ENABLE_BIT(REG, ENABLE_BIT) (REG|ENABLE_BIT)
#define SET_MODE_BITS(REG, MODE_BITS) REG|(MODE_BITS<<1)
#define SET_SPEED_BITS(REG, SPEED_BITS) REG|(SPEED_BITS<<3)



uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    // Use macros to set fields
    uint16_t result;
    result = SET_ENABLE_BIT(result, enable);
    result = SET_MODE_BITS(result, mode);
    result = SET_SPEED_BITS(result, speed);
    return result;
}

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