Set Baud Rate Field in Control Register

Code

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

#include <stdint.h>

uint32_t set_baud_rate(uint32_t reg, uint8_t baud) {
    int startP = 8;      // baud field starts at bit 8
    int bitSize = 4;     // baud field width = 4 bits

    // Create a mask to clear the baud field
    uint32_t mask = ((1U << bitSize) - 1) << startP;
    reg &= ~mask;  // clear bits 8–11

    // Insert baud value into cleared field
    uint32_t baudVal = ((uint32_t)baud<<8) & mask;
    reg |= baudVal;

    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