On Sun, 2011-01-09 at 12:41 -0600, Jon Elson wrote: > Kirk Wallace wrote: > > > > I'm not John, but from my study of encoder, it seems encoder is really a > > software interface and decoder, > The hal component encoder is a specific implementation of an encoder, > equivalent in function > to a general encoder counter module which might be partly implemented in > hardware or software.
I think the term encoder has been used rather loosely, but Wikipedia states: " An encoder is a device, circuit, transducer, software program, algorithm or person that converts information from one format or code to another,... " To me, that means a rotary disk and sensor encodes position information into a set of quadrature signals. Then, I consider that the quadrature signals are "decoded" by the misnamed encoder component into counts which are then stored and managed by a count/position register -- encoder => decoder => counter. It's really just mice nuts, but I'm doing jury duty right now, so I may me in a lawyer's frame of mind. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA ------------------------------------------------------------------------------ Gaining the trust of online customers is vital for the success of any company that requires sensitive data to be transmitted over the Web. Learn how to best implement a security strategy that keeps consumers' information secure and instills the confidence they need to proceed with transactions. http://p.sf.net/sfu/oracle-sfdevnl _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
