问题
I have a document with connection information to a device over a serial port. It specifies "full duplex" as the setting for flow control. Under Windows, I have the following options for setting up the flow control:
- Xon/Xoff
- Hardware
- None
What is the equivalent of "full duplex" in the above list?
回答1:
"xon/xoff" is a synonym of "software flow control" (as opposed to "hardware flow control").
"full duplex" means "in both directions"; theoretically you can enable software flow control or hardware flow control in one direction only (i.e. "half duplex"), or in both directions ("full duplex") ... so there's not enough information to answer the question.
What kind of device is it? If I had to guess, my first guess would be "hardware" flow control, simply because "software flow control" is less compatible than "hardware flow control" with transferring binary data.
来源：https://stackoverflow.com/questions/440515/serial-port-equivalent-of-full-duplex-flow-control