"Tom Brown" <[EMAIL PROTECTED]>
| Hey people, | | I've written a python app that r/w eight serial ports to control eight devices | using eight threads. This all works very nicely in Linux. I even put a GUI on | it using PyQt4. Still works nicely. | | Then I put the app on on a virtual Windows machine running inside of vmware on | the same Linux box. Vmware only lets me have four serial ports so I run the | app against four serial ports using four threads. The app did not respond | quick enough to data from the serial ports and eventually hung. | | So, I tried one serial port and the app still did not respond quick enough to | the single serial port. It eventually hangs. | | When the app hung, in each case, it was not hogging the cpu nor reading any | data off the serial ports. The task manager didn't show it was doing anything | at all. | | When it runs on Windows, could it be: | | 1) Just struggling to run inside of VMware? | | 2) Using threads with Qt on Windows is a problem? | | 3) Threads in python on Windows is a problem? | | Any ideas? | | Thanks, | Tom I cant help you really, but I can put what little weight I have behind you - I am also struggling with serial port implementation - I posted here some time ago and got some answers - and my intermittent failure is now down to about once a week. I found that while python's file handling and the GUI stuff works seamlessly across platforms, the serial port handling seems quirky and platform dependant : It is extraordinarly difficult to write non blocking reads that will work 'out of the box' across platforms - in fact I dont know if it is possible.. And making a pipe non blocking is poison... - Hendrik -- http://mail.python.org/mailman/listinfo/python-list
