HDLC有单独的库的,HDLC有勘误表的用之前要看看 。
https://bbs.21ic.com/forum.php?mod=attachment&aid=MTE3NzIwNHw2NjliODg4MnwxNzYxNDUwNzY4fDB8
https://bbs.21ic.com/forum.php?mod=attachment&aid=MTE3NzIwNnxiZWIxODE0NnwxNzYxNDUwNzY4fDB8
https://bbs.21ic.com/forum.php?mod=attachment&aid=MTE3NzIwOHw5YzEyMmI4MnwxNzYxNDUwNzY4fDB8
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