Re: [Emc-users] Why not use USB to replace the Printer Port

2007-11-04 Thread Stephen Wille Padnos
[EMAIL PROTECTED] wrote: > I am puzzled by the issues raised of DMA and interrupts as a problem > in using USB. I think that was part of the RT ethernet discussion, but I could be wrong :) > In the WinXP system a common way of using USB connections is to > handle it as a 'Virtual Comm Port' (

Re: [Emc-users] Why not use USB to replace the Printer Port

2007-11-04 Thread Jeff Epler
EMC does not use Linux device drivers for realtime control of motor position. It uses special "real time" drivers. A specific real-time driver must be written for each type of hardware interface. Jeff - This SF.net email is

[Emc-users] Why not use USB to replace the Printer Port

2007-11-04 Thread [EMAIL PROTECTED]
I am puzzled by the issues raised of DMA and interrupts as a problem in using USB. In the WinXP system a common way of using USB connections is to handle it as a 'Virtual Comm Port' (VCP). When you plug in your USB device it is assigned a Comm port number. After that the data link behaves exact