23. Set Baud Rate Field in Control Register

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

uint32_t set_baud_rate(uint32_t reg, uint8_t baud) {
    
    const uint32_t BAUD_RATE_POS = 8;
    const uint32_t BAUD_RATE_MASK = 0b1111 << BAUD_RATE_POS;

    reg &= ~BAUD_RATE_MASK;

    reg |= ((uint32_t)baud << BAUD_RATE_POS) ;  

    return reg;
}

int main() {
    uint32_t reg;
    uint8_t baud;
    scanf("%u %hhu", &reg, &baud);
    printf("%u", set_baud_rate(reg, baud));
    return 0;
}