Re: [CAD_CAM_EDM_DRO] Interface options, headless boxen, and remote control ...

I've got a couple of the TI C compilers that came with my development kits.
That's what I've used before. But I like to learn a new chip at the Assembly
level. TI Assembly frustrates me.

later,
Larry E.

----- Original Message -----
From: "Carol & Jerry Jankura" <jerry.jankura@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Sunday, August 19, 2001 12:48 PM
Subject: RE: [CAD_CAM_EDM_DRO] Interface options, headless boxen, and remote
control ...


> You might consider using the TI DSP C language compiler. In the past, I've
> done some image analysis software with it and was happy with the results.
> The bonus was that I could check out a lot of the code on a PC usign
> Borland's complier and debugger, then move the code over to the DSP and
have
> it work. A much nicer situation than trying to debug on the DSP.
>
> -- Jerry Jankura
> Strongsville, Ohio
> So many toys, so little time....
>
>
> | -----Original Message-----
> | From: Larry Edington [mailto:ledington@...]
> | Sent: Sunday, August 19, 2001 1:05 PM
> | To: CAD_CAM_EDM_DRO@yahoogroups.com
> | Subject: Re: [CAD_CAM_EDM_DRO] Interface options, headless boxen, and
> | remote control ...
> |
> |
> | If it gets a DSP it will be a TI dsp. I've got several TI DSP
development
> | boards and a buddy that
> | teaches TI DSP. While I much prefer Analog Devices DSP Assembly
> | language as
> | TI's Assembly looks
> | like gobbledegook to me, I have more help available for the TI parts.
> |
> | I've just got to figure out how the DSP will fit in and be utilized.
> |
> | later,
> | Larry E.
> |
> |
> |
> | ----- Original Message -----
> | From: "Carlos Guillermo" <carlos@...>
> | To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> | Sent: Sunday, August 19, 2001 11:46 AM
> | Subject: RE: [CAD_CAM_EDM_DRO] Interface options, headless boxen,
> | and remote
> | control ...
> |
> |
> | > Go for it, Larry! -
> | >
> | > I only have one suggestion, and that is to look at the TI
> | > TMS320LC2402 for your DSP. It has lots of on-board motion control
> | > capabilities for CHEAP. I think they were saying $3-4 in 1k qtys.
> | > They also have a flash version for $9.
> | >
> | > This takes you to the TMSLC2402A:
> | >
> | > http://focus.ti.com/docs/prod/productfolder.jhtml?genericPartNumbe
> | > r=TMS320LC2402A
> | >
> | > This will take you to the product range page:
> | >
> | > http://dspvillage.ti.com/docs/catalog/misc/dspparatable.jhtml?fami
> | > lyID=322&_DARGS=%2Fdspvillage%2Fdocs%2Fcatalog%2Fmisc%2Fdsppfcrumb
> | > let.jhtml.3_A&_DAV=322
> | >
> | > HTH,
> | >
> | > Carlos Guillermo
> | > VERVE Engineering & Design
> | >
> | > -----Original Message-----
> | > From: Larry Edington [mailto:ledington@...]
> | > Sent: Sunday, August 19, 2001 12:25 PM
> | > To: CAD_CAM_EDM_DRO@yahoogroups.com
> | > Subject: Re: [CAD_CAM_EDM_DRO] Interface options, headless boxen,
> | > and remote control ...
> | >
> | > RS-422 / 485 is still a serial device. There's just so much you
> | > can do with
> | > a serial
> | > data stream with a UART or USRT that is decoded in the PC's I/O
> | > space when
> | > reading
> | > and writing to a device at the end of the pipe. I've designed
> | > motor
> | > controllers using
> | > RS-485 links with microcontrollers and they work great. But it's
> | > not a good
> | > design
> | > for a CNC control.
> | >
> | > I looked at microcontrollers hanging off a serial port. I even
> | > built one.
> | > Still it was
> | > too limited by the serial pipe. Plus you have to rewrite the code
> | > that's
> | > already been
> | > written to parse the G code and put the code to do the
> | > interpolation out in
> | > the micro.
> | >
> | > I don't care at all for the parallel port either.
> | > It's greatly limited and is a kludge for CNC due to the way it was
> | > designed
> | > for parallel
> | > printers back in the early 80's.
> | >
> | > A few years ago I designed an ISA card that provided a several 8
> | > bit ports
> | > and used a
> | > 37 pin connector like the Ahha card does. It used a simple PLD for
> | > address
> | > decoding.
> | > That was good for several axis of I/O but still was limited by the
> | > 37 pin
> | > connector. So
> | > I added another 25 pin internal ribbon cable connector and added a
> | > 25 pin
> | > slot mounted
> | > connector. It was still limited by the fact it was just a dumb
> | > I/O port.
> | > All the load is on
> | > the OS and host processor.
> | >
> | > I've been looking at this for a few years. ISA was the way to go.
> | > But those
> | > days are
> | > gone. ISA is a dead bus and is going away.
> | >
> | > Welcome to the world of PCI. There are PCI parallel multiport
> | > cards that
> | > could
> | > be used but you are still limited when you get into 4+ axis with
> | > full limit
> | > switches.
> | >
> | > I've been kicking around the idea of designing a PCI card to do
> | > CNC I/O
> | > with.
> | >
> | > So about a month ago, I decided to commit $$$ and time to it. The
> | > card will
> | > be a 32 bit PCI
> | > card with lots of on board memory for step buffer, timers,
> | > counters, encoder
> | > interfaces,
> | > spindle interfaces and lots of auxillary I/O. The design has been
> | > started
> | > and if all goes
> | > well, in a couple of months I'll have the first prototypes
> | > running. I'm
> | > thinking 6 axis but
> | > 8 axis might make it in there. It will support steppers as well as
> | > servos
> | > and could even
> | > be used to run steppers in closed loop mode with encoders.
> | >
> | > I'm also talking to a DSP guru buddy of mine about adding a DSP
> | > chip to it.
> | > I'm not a DSP expert but can see how an off board DSP could help
> | > in some
> | > of the calculations CNC requires.
> | >
> | > The PCI card will cable to a breakout box where all of the
> | > connections to
> | > the real
> | > world will be. I'm kicking around the idea of an optical interface
> | > to the
> | > breakout box.
> | > If not optical it'll be differential to the breakout box for noise
> | > immunity.
> | >
> | > I'm going to try to do it right. My hope is to end up with an
> | > interface with
> | > an open API
> | > that anyone that wants to can write code or drivers for that will
> | > be a
> | > viable interface
> | > for several years to come. But one that is affordable to build.
> | >
> | > Linux and EMC is not my first priority. I prefer Windows. But I'm
> | > sure I'll
> | > find someone that
> | > will be willing to write Linux drivers for it.
> | >
> | > If nothing else, I'll finally have the interface I have wanted for
> | > years.
> | >
> | > later,
> | > Larry E.
> | >
> | >
> | >
> | >
> | > Addresses:
> | > FAQ: http://www.ktmarketing.com/faq.html
> | > FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> | >
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> | > Moderator: jmelson@... timg@... [Moderator]
> | > URL to this page: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> | > bill,
> | > List Manager
> | >
> | >
> | >
> | > Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
> >
> >
>
>
> Addresses:
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> bill,
> List Manager
>
>
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>
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>
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