Set Baud Rate Field in Control Register

Code

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

#define BAUD_POS_IN_UART_CTRL_REG       8

uint32_t set_baud_rate(uint32_t reg, uint8_t baud) {
    // Prepare mask to clear all bits from pos 8 to 11 (0-indexed)
    uint32_t baud_clear_mask = ~(0xF << BAUD_POS_IN_UART_CTRL_REG);
    reg &= baud_clear_mask;

    // set new baud in reg
    reg |= (baud << BAUD_POS_IN_UART_CTRL_REG);

    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