David wrote: > I'm wondering if python is capable of fairly precise timing and also sending > data out the parallel port. > > For example ; making a 7.5 KHz square wave come out of one of the data pins > on the printer port. > > I've tried to help myself with this one but searching in the "Python Library > Reference" that installed with my version, [ Python 2.4.1. ] yielded > nothing on the subject of either timing or parallel port.
What are you trying to use this for? What kind of jitter does your specification allow? (That is, since you can't get the edge transitions exactly 66.6 microseconds apart all the time, how much variation are you able to handle?) What will happen if, say, once every five or ten seconds the OS hiccups and prevents your task from running for a full second? Doing this kind of high-speed realtime control on a non-realtime operating system is generally difficult or impossible, but it does depend on how precise you need to be, and how "soft" your realtime requirements are. My gut feeling is that you cannot achieve what you want using Python on Windows (or Linux!), but it depends on your needs, not my gut. :-) -Peter -- http://mail.python.org/mailman/listinfo/python-list
