TX Key Line Events Over Winkey/Serial

[joshuarubin]

I'm writing a winkey client that I'd like to be able to generate its own sidetone through the computer audio interface. I recognize that I'll have to generate the tone and deal with the os side of things myself. That said, I just want to make sure there is no way to get real time tx key line events via winlink (or any other way) over serial.

Presuming there isn't, I was thinking of overriding the WINKEY_2_SUPPORT status message (0xC8), with a feature flag, to indicate when the tx line state changes so that I know when to start/stop the sidetone on the computer. This is obviously breaking the winkey standard, so I may also add a, also non-standard, command that has to be called to enable it once the host is opened.

Do you see any issues with this approach? I recognize that 1200 baud is pretty slow to get accurate timing out of this, but I'm hoping that with the 9600 "high" baud mode that it'll be good enough.

Thanks a bunch!