Construct UART Data Frame with Parity Bit

MI mi 

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

typedef struct {
    uint8_t parity_enable : 1;
    uint8_t parity_type   : 1;
    uint8_t reserved      : 6;
} UART_Control;
int countBits(uint8_t n)
{   int count=0;
    while (n > 0) {
    n &= (n - 1);
    count++;
}
return count;
}
uint8_t create_uart_frame(uint8_t data, UART_Control *ctrl) {
     if(ctrl-> parity_enable==0)
     {
        return data & 0x7F;
     }
     else
     {
        
        if(ctrl-> parity_type == 0)
        {
          if(countBits(data)%2==0) return data & 0x7F;
          else
             return data | 0x80;
        }
        else
        {
            if(countBits(data)%2==1) return data & 0x7F;
          else
             return data | 0x80;
        }
     }
    return 0;
}

int main() {
    uint8_t data;
    scanf("%hhu", &data);  // 7-bit input

    uint8_t parity_enable, parity_type;
    scanf("%hhu %hhu", &parity_enable, &parity_type);

    UART_Control ctrl;
    ctrl.parity_enable = parity_enable;
    ctrl.parity_type = parity_type;

    uint8_t frame = create_uart_frame(data, &ctrl);
    printf("frame = 0x%02X", frame);

    return 0;
}

Solving Approach