Why do some programs require x10attach?
This could change if I figure out a better way. When the project started out, the only two drivers targeted were the CM11A and the PowerLinc Serial. I put a general call out to the comp.home.automation newsgroup asking for help and it was suggested that I look at Vojtech Pavlik’s code for the input abstraction layer. This was a pretty good match for what I was doing so I adapted his approach to create my abstraction. But, for it to work, you have to have a user-space program register the TTY device with the line discipline driver. The Firecracker, on the other hand, requires direct access to the CTS and RTS lines to signal the transceiver. It isn’t a standard serial device and actually draws power and signal from the CTS and RTS pins. As a result, the line discipline driver for the FireCracker is specific to the 8240 and 16550 UART chips and accepts the port information on the command line when loading the driver. Finally, the PowerLinc USB doesn’t communicate through the TTY interface
