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 num_of_ones(uint8_t data) {
    // Your logic here
    uint8_t counter=0;
    while(data)
    {
        data = data & (data - 1);
        counter++;
    }
    return counter;
}

uint8_t create_uart_frame(uint8_t data, UART_Control *ctrl) {
    // Your logic here
    data = data&0x7F;
    if(ctrl->parity_enable)
    {
        if(ctrl->parity_type)
        {
            //parity type odd
            if(0 == (num_of_ones(data)%2))
            {
                //even
                data = data|0x80;
            }
        }
        else
        {
             //parity type even
            if(1 == (num_of_ones(data)%2))
            {
                //odd
                data = data|0x80;
            }

        }
    }
    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