Problem with usb serial port ordering.

[Steven W. Orr]

I have two usb devices which I shall call spm and fp. They end up at 
ttyUSB0 and ttyUSB1 but the order that they get accessed causes us to not 
know which device we're talking to until they are first referenced.

Does anyone know if there's a way to cause a specific device to always 
come up on a specified ttyUSB? e.g., if spm happens to want to come up as 
ttyUSB1 and I want it to be on ttyUSB0, is there a way?

-- 
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steveo at syslang.net