On Friday 20 March 2020 10:53:49 Peter C. Wallace wrote:
> On Fri, 20 Mar 2020, Gene Heskett wrote:
> > Date: Fri, 20 Mar 2020 10:20:51 -0400
> > From: Gene Heskett <ghesk...@shentel.net>
> > Reply-To: "Enhanced Machine Controller (EMC)"
> > <emc-users@lists.sourceforge.net>
> > To: emc-users@lists.sourceforge.net
> > Subject: Re: [Emc-users] A hal question?
> >
> > On Friday 20 March 2020 09:14:08 Peter C. Wallace wrote:
> >> On Thu, 19 Mar 2020, Gene Heskett wrote:
> >>> Date: Thu, 19 Mar 2020 21:55:55 -0400
> >>> From: Gene Heskett <ghesk...@shentel.net>
> >>> Reply-To: "Enhanced Machine Controller (EMC)"
> >>> <emc-users@lists.sourceforge.net>
> >>> To: emc-users@lists.sourceforge.net
> >>> Subject: Re: [Emc-users] A hal question?
> >>>
> >>> On Thursday 19 March 2020 19:12:37 Jon Elson wrote:
> >>>> On 03/19/2020 04:02 PM, Gene Heskett wrote:
> >>>>> Greetings; I am trying to reduce the f/r error in an ATS667
> >>>>> based encoder.
> >>>>>
> >>>>> The index pulse is turned upside down by a reversal of spindel
> >>>>> direction. Tts the nature of the beast to remain in this stable
> >>>>> state until the approach of the triggering ferrous metal causes
> >>>>> the first reversal which the edge ignores, and then goes back
> >>>>> true or false as the ferrous piece crosses the center.
> >>>>>
> >>>>>
> >>>>>
> >>>>> Does anyone see any problems with that?
> >>>>
> >>>> The index pulse is only used during the initial synch to the
> >>>> spindle, then the encoder is counted
> >>>> up and down during reversals, without looking at the index
> >>>> again. So, rigid tapping doesn't care
> >>>> that the index signal from the encoder does something
> >>>> different when the spindle is running in
> >>>> reverse. It has been this way since I did the first ATS667
> >>>> encoder hack some years ago.
> >>>>
> >>>> Jon
> >>>
> >>> Thats good news, but it looks as If I'll have to burn a new card
> >>> to get the pin Peter just told me about, unless mesaflash has
> >>> grown the ability to work thru an rpspi interface. I did have a
> >>> machine with all the card firmware on it but had to put it on the
> >>> G0704 with a new SSD drive after I apparently blew a pci bus
> >>> driver during a local t-storm. The parport on that box isn't
> >>> currently in use so I'll have to see if that machine can program a
> >>> new 7i90HD since I don't believe the pi4 can w/o building a
> >>> hardware parport for it.
> >>
> >> Mesaflash works over SPI on RPI3 and RPI4 (and probably many other
> >> SBCs) because it uses the kernel SPI driver, not direct hardware
> >> access. Note that running an older hm2_rpspi driver disables the
> >> kernel SPI driver so you may have to reboot to run mesaflash if you
> >> have run LinuxCNC (this has been fixed in master a few months ago)
> >>
> >> sudo mesaflash --device 7i90 --interface spi --addr [spi device
> >> name] --readhmid
> >>
> >> (I forget what the first RPI SPI device is named, maybe
> >> /dev/spi0.0?)
> >
> > After a reboot, there are no /dev/spi anything, and the sample
> > commandline:
>
> You need to enable the spi device first with raspi-config
>
> then
>
> sudo mesaflash --device 7i90 --spi --addr /dev/spi0.0 --readhmid
>
> should work (assuming spi0.0 is the correct name)
>
same error. That made /dev/spidev0.0 and 0.1
but
pi@rpi4:~ $ sudo mesaflash --device
7i90 --spi --addr /dev/spidev0.0 --readhmid
/sbin/mesaflash: 1: /sbin/mesaflash: Syntax error: "(" unexpected
pi@rpi4:~ $ sudo mesaflash --device
7i90 --spi --addr /dev/spidev0.1 --readhmid
/sbin/mesaflash: 1: /sbin/mesaflash: Syntax error: "(" unexpected
This is from a fresh dl of 7i90.zip this morning. 2Gig rpi4b, with an
armhf version of raspbian-10.3 (buster( on it and a 4.19.71-rt24-v7l+ #1
SMP PREEMPT RT kernel. AHA! File gives answer:
pi@rpi4:~ $ file /sbin/mesaflash
/sbin/mesaflash: ELF 32-bit LSB executable, Intel 80386, version 1
(SYSV), dynamically linked, interpreter /lib/ld-linux.so.2, for
GNU/Linux 2.6.15,
BuildID[sha1]=82175bbc027ad185c469109dd1920ca9d0b9515e, with debug_info,
not stripped
I think its time I asked the missus what she wants for lunch that I can
still conjure up.
>
> Peter Wallace
> Mesa Electronics
>
>
>
> _______________________________________________
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> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users
Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
If we desire respect for the law, we must first make the law respectable.
- Louis D. Brandeis
Genes Web page <http://geneslinuxbox.net:6309/gene>
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