On Sat, 2010-12-04 at 09:38 -0800, Peter C. Wallace wrote: ... snip > Maybe a simple watchdog that avoids the noise trigger issue would be a DPLL > that locks onto the chargepump signal. Once locked it enables its output and > stops rate tracking. Any subsequent variation in rate (beyond some margin) > would trigger a watchdog bite. If run from the servo loop this rate tolerance > could be quite small so at 1 mS servo thread, the watchdog could bite at 1.1 > ms(and .9 mS). This also does not require any watchdog timeout setting > jumpers etc.
Brilliant. I could have the ATtiny sample the pump to get a short edge count and a long edge count, add a cushion, then switch to survey mode to check that the edges are within the two counts (within an error rate?). Seems kind of simple now. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA ------------------------------------------------------------------------------ What happens now with your Lotus Notes apps - do you make another costly upgrade, or settle for being marooned without product support? Time to move off Lotus Notes and onto the cloud with Force.com, apps are easier to build, use, and manage than apps on traditional platforms. Sign up for the Lotus Notes Migration Kit to learn more. http://p.sf.net/sfu/salesforce-d2d _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
