Like jmk, I'm wary of the idea of introducing NaNs onto hal signals. Not quite the same thing, but we've experienced in nontrivial kinematics that a NaN output from forward or inverse kins can propagate in such a way that you can't recover without shutting down and restarting LinuxCNC (e.g., "my positions are all NaNs now and I homing doesn't help")
That said, you should feel free to experiment. You can produce a NaN value with the expresion: __builtin_nan("") (gcc extension) Jeff ------------------------------------------------------------------------------ Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, more! Discover the easy way to master current and previous Microsoft technologies and advance your career. Get an incredible 1,500+ hours of step-by-step tutorial videos with LearnDevNow. Subscribe today and save! http://pubads.g.doubleclick.net/gampad/clk?id=58041391&iu=/4140/ostg.clktrk _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers