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)){
        return data;
    }
    else{

        int count = 0;
        for(int i = 0; i < 8; i++){
            if(data & (1<<i)){
                count++;
            }
        }

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