76. Construct UART Data Frame with Parity Bit

#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
    {
        int x = data;
        int count = 0;
        while(x)
        {
            x = x & (x-1);
            count++;
        }
        if(ctrl->parity_type)
        {
            if(count % 2 != 0)
            {
                return data;
            } else {
            return (data | 0x80);
            }
        }
        else
        {
            if(count % 2 == 0)
            {
                return data;
            } else {
            return (data | 0x80);
            }
        }
    }
    
}

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;
}