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 &=~(1<<7);
    else {
        if (ctrl->parity_type == 0) {
            int check_bit = 0;
            for (int i = 0; i < 7;i++) {
                if ((data>>i)&(0x01) == 1) check_bit++;
            }
            if (check_bit % 2 == 0) return data &=~(1<<7);
            else return data |=(1<<7);
        }
        else {
            int check_bit = 0;
            for (int i = 0; i < 7;i++) {
                if ((data>>i)&(0x01) == 1) check_bit++;
            }
            if (check_bit % 2 == 0) return data |=(1<<7);
            else return data &=~(1<<7);
        }
    }
    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