Hello Mark, Ethernet is a sloppy name for IEEE 802.3, the real protocol name is Carrier Sense Multiple Access/Collision Detection (CSMA/CD). In local wireless networks, /CA is used (Collosion Avoidance) instead of /CD. Other Bus protocols are based on the same idea such as CAN bus (CSMA/CR, Collision Resolution) and others.
All these protocols have in common that they are asynchronous and data transmission is randomly timed, depending on network load. Just the same especially with serial busses like USB. Since EMC is based on exactly timed pulse generation, there is PRINCIPALLY no use trying to adapt it to the protocol systems mentioned. Why not stick to the parallel port? Best regards Peter Blodow Mark Wendt (Contractor) schrieb: > On 2/26/2011 3:35 PM, cogoman wrote: > >> On 02/24/2011 01:35 PM, emc-users-requ...@lists.sourceforge.net wrote: >> >>> It would be nice if there was a way to interface CNC equipment via USB such >>> that the timing of actions was being scheduled in the controller rather than >>> by the host O/S. >>> >>> That way it would not be necessary to run a specific version of the O/S >>> hacked up to provide real time scheduling. All that would be necessary would >>> be to have the host able to guarantee response within a few seconds. >>> >>> >>> Parallel ports are effectively obsolete these days and finding a motherboard >>> with support is starting to confine selection. So this is effectively >>> meaning I have to use an obsolete machine that I am not sure I could replace >>> in a hurry. >>> >> Sounds like the NGX BlueBoard-LPC1768-H might be all the hardware you'd >> need. >> >> http://shop.ngxtechnologies.com/product_info.php?cPath=21&products_id=65 >> <http://shop.ngxtechnologies.com/product_info.php?cPath=21&products_id=65> >> > > Hmmm, wonder if that board could be programmed to be a real time > ethernet slave? > > Mark > > ------------------------------------------------------------------------------ > Free Software Download: Index, Search & Analyze Logs and other IT data in > Real-Time with Splunk. Collect, index and harness all the fast moving IT data > generated by your applications, servers and devices whether physical, virtual > or in the cloud. Deliver compliance at lower cost and gain new business > insights. http://p.sf.net/sfu/splunk-dev2dev > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > ------------------------------------------------------------------------------ Free Software Download: Index, Search & Analyze Logs and other IT data in Real-Time with Splunk. Collect, index and harness all the fast moving IT data generated by your applications, servers and devices whether physical, virtual or in the cloud. Deliver compliance at lower cost and gain new business insights. http://p.sf.net/sfu/splunk-dev2dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
