"Tosoni" <jp.tosoni@xxxxxxxxx> writes: >> A flag alone is no help for half-duplex devices, they would need >> a complete handshaking code. > > Not true. > This is also the view of the former maintainer of drivers/serial. It's just reality. If your IC in question does this in hardware - fine, but you still have to support it in the driver, adding a #define XXX doesn't help. "Code talks". > But > obviously neither of you used half duplex devices before. This is your "not true". I was using them, though they weren't modems. > There is no need for handshake, since half duplex is used in master/slave > situations. Not necesarily, there are CSMA/CD-style designs as well as token-ring style. > And I can insure you, that Windows handles this very well, using > only the above-mentioned RTS_TOGGLE flag. That means the DCE does all the buffering and handshaking. I'd say it's not common, most devices are simpler. -- Krzysztof Halasa - To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
