Set Baud Rate Field in Control Register

Code

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

uint32_t set_baud_rate(uint32_t reg, uint8_t baud) {
    // Your code here
    uint32_t mask;
    mask = baud;
    mask = mask << 8;           // move mask into place
    reg = (reg & 0xFFFFF0FF);   // clear the hole
    reg = (reg | mask);         // insert the mask

    return reg;
}

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

Solving Approach

move the mask into place

create a hole in the register, punch out current baud rate

insert the new baud rate