Hi Andy, > -----Original Message----- > From: andy pugh [mailto:bodge...@gmail.com] > Sent: September-20-19 1:58 AM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] MESA 7i92H Power > > On Fri, 20 Sep 2019 at 07:03, John Dammeyer <jo...@autoartisans.com> > wrote: > > > > > However the problem is that under MACH3 I can select which pin is the > PWM > > and which pin is the direction and I can't do that with the 7i92H. > > > > It seems that the Smoothstepper has a utility that can map functions to > individual pins, though pins are dedicated in direction (with some > bidirectional) > > On the Mesa cards the IO pins can all be configured as input or output, but > this is all set by the firmware rather than configured by a utility. (Or > maybe the Smoothstepper utility creates a firmware on the fly?) > > To re-allocate pins on the Mesa card you need to create a different bit > file. (so, once again, the LinuxCNC option is much more configurable, but > much more difficult to configure...) > > It is possible to create custom bitfiles, I have done it, but it's not > trivial and needs utilities from the FPGA manufacturer. (Xylinx) > > The pragmatic answer might be a couple of D-sub headers and some > point-to-point wiring to make a pin-swapper. > > Which pin do you want the PWM to be on? You might find a firmware to suit > by grep-ing (or using find-in-files in Geany or Notepad++) the .vhd files.
I may not have explained it well in the previous posting. My apologies. Currently the allocation for the PWM section of the FPGA can be mapped (or just used as a output) onto the DB-25 Pin 14 which I want for SPINDLE RPM. IO Connections for P2 Pin# I/O Pri. func Sec. func Chan Pin func Pin Dir 14 1 IOPort PWM 0 PWM (Out) Pin 16 is simply set as an output and I'd map it as the direction for the Spindle r if I used the R990x2D pin file it's already set that way. And in 7i92_C11Gx2D.pin 16 5 IOPort None Or in 7i92_R990x2D.pin 16 5 IOPort PWM 0 Dir (Out) However, the PWM module from PMDX is hard wired for PWM on pin 16 and PWM Direction on pin 14. I suspect in the source code for the FPGA this is a two line change. And that's all I really need done. Thanks John > > I did once consider the idea of an Amazon VM that would build a custom > bitfile on-demand (and got s far as setting up an instance that could build > bitfiles, then stalled at the point where a web interface was needed) > > -- > atp > "A motorcycle is a bicycle with a pandemonium attachment and is designed > for the especial use of mechanical geniuses, daredevils and lunatics." > � George Fitch, Atlanta Constitution Newspaper, 1916 > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
