Set Baud Rate Field in Control Register

Code

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

#define len 4
#define pos ((1U << (((11 - 8) + 1)) - 1))

uint32_t set_baud_rate(uint32_t reg, uint8_t baud) {
    // Your code here
    uint32_t mask = (1U << len) - 1;
    reg &= ~(mask << pos);
    reg |= (baud & mask)<<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;
}



/*

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

#define BAUD_POS 8      // starting bit position
#define BAUD_LEN 4      // field width

uint32_t set_baud_rate(uint32_t reg, uint8_t baud) {
    uint32_t mask = (1U << BAUD_LEN) - 1;  // 0b1111
    reg &= ~(mask << BAUD_POS);            // clear bits [11:8]
    reg |= (baud & mask) << BAUD_POS;      // set new baud value
    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