from typing import Literal


def format_comm_debug(
    prefix: Literal["RX", "TX"], data: bytes, include_ascii: bool = False
) -> str:
    hex_representation = " ".join(f"{byte:02X}" for byte in data)

    output = [
        f"{prefix}: ",
        hex_representation,
    ]

    if include_ascii:
        ascii_representation = "".join(
            (chr(byte) if 32 <= byte <= 126 else ".") for byte in data
        )
        output.append(" // ASCII: " + ascii_representation)

    return "".join(output)