> On Jun 5, 2015, at 4:57 PM, Roland King <[email protected]> wrote: > > a plugged-in USB serial device, I usually use the callout device > /dev/cu.usbmodemxxxxx, the tty I think is the dial in device. Usually it’s > the callout you want to open.
That’s an interesting point. I have two different types of devices I’m connecting: one is a data-outputting GPS device, and the other is a (mostly) data-accepting controller board. Is the general usage to specify kIODialinDeviceKey to obtain a /dev/tty for incoming traffic (data-outputting devices), and kIOCalloutDeviceKey to obtain a /dev/cu for outgoing traffic (data-accepting devices)? What are kIOTTYDeviceKey and kIOSerialBSDTypeKey used for? I can’t find any documentation on these keys. (This sounds like it harkens back to the days of RS232 flow control, which probably isn’t an issue with USB/serial devices.) -Carl
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