Construct UART Data Frame with Parity Bit

Code

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

typedef struct {
    uint8_t parity_enable : 1;
    uint8_t parity_type   : 1;
    uint8_t reserved      : 6;
} UART_Control;

uint8_t create_uart_frame(uint8_t data, UART_Control *ctrl) {
    // Your logic here
    if(ctrl->parity_enable == 0)
    {
        return data;
    }
    else
    {
        if(ctrl-> parity_type == 0)
        {
            int cnt_even = 0;
            for(int i = 0; i < 7; i++)
            {
                if(((data>>i) & 0x01) == 1)
                {
                    cnt_even++;
                }
            }
            if(cnt_even % 2 == 0)
            {
                return data;
            }
            else return data | 0x80;
        }
        else 
        {
            int cnt_odd = 0;
            for(int i = 0; i < 7; i++)
            {
                if(((data>>i) & 0x01) == 1)
                {
                    cnt_odd++;
                }
            }
            if(cnt_odd % 2 == 0)
            {
                return data | 0x80;
            }
            else return data;
        }
    }
}

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