Jon Elson wrote: > John Kasunich wrote: >> Jon Elson wrote: >>> One way out of this would be to have this GPIO on a separate EPP >>> port (unless the GPIO hardware is the same as the motion hardware). >> >> We are talking about the Mesa FPGA based boards, with 72 I/O pins on one >> board. So yes, the GPIO is on the same EPP bus (and the same chip) as >> the encoders, PWM, step generators, etc. > OK, same problem as my PPMC line, then. But, 1 KHz isn't fast > enough? Or, does handling the Mesa's 72 I/O points take a lot > longer than my 24?
I haven't done speed tests of the 7i43 with hostmot2 for a while, but i think low ones of KHz update rates are reasonable. Say 1-4 KHz or so. That's for reading all the encoders, stepgens, and gpios, and writing all the pwmgens, stepgens, and gpios. -- Sebastian Kuzminsky Cryogenic travel has improved since then... I woke screaming in a translucent box. “There, there,” said the box. “Everything will be all right. Have some coffee.” -- Ken Macleod, "Who's afraid of Wolf 359" <http://outofthiseos.typepad.com/blog/files/KenMacleodWhosAfraidofWolf359.htm> ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
