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
    uint8_t frame = 0x7f & data;
    if(ctrl->parity_enable == 0)
        return frame;
    else{
        uint8_t reg=frame;
        uint8_t cnt=0;
        while(reg){
            if (reg & 0x1) cnt++;
            reg=reg>>1;
        }

        if(ctrl->parity_type==0){
            if(cnt%2==0)
                return frame;
            else 
                return frame | (1<<7);
                }
        if(ctrl->parity_type==1){
            if(cnt%2==0)
                return frame | (1<<7);
            else 
                return frame;}
    }
    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