Re: This is my same confusion (Port#2 re-visited)

["Patrick Riedlinger" <patr-at-precidesign.com>]

First I want to thank Marc Christensen, Ray Henry and Tim Goldstein for
attempting to tutor me in EMC I/O theory. But Jason put in the same snippit
from the same INI file that confused me. Please note below:

ESTOP_SENSE_INDEX         =     1

This means that S1 on this particular parallel port is an input, right?

Ok, now observe this:

SPINDLE_FORWARD_INDEX     =     1

This implies that the same D1 line is being used as an output.

Then finally,

ESTOP_WRITE_INDEX         =     10
SPINDLE_BRAKE_INDEX       =     11

Are these two C2 and (Bar) C3?

THIS IS WHY I AM CONFUSED. I am assuming that the numbers that are in the
INI file associated with these input and output fuctions are the (data) line
numbers. D0, D1, D2, etc.

So if I am assuming correctly, SPINDLE_FORWARD_INDEX  is really D1 (Pin 3)

And, ESTOP_SENSE_INDEX is really (S1 in IO_Show.tcl) or S4 (Pin 13) in
www.ktmarketing.com/CNC.html

And...ESTOP_WRITE_INDEX         =     C2 (Pin 16)
SPINDLE_BRAKE_INDEX       =     C3 (Pin 17)

So...am I still confused? I look at KT marketing's fine port pinout and I
realize the nameing conventions are not the same as in IO_show.tcl (Kudos to
the efforts of everyone who made these tools...I am a newbie, I need
spoon-feeding)


BTW, I am planing to use Steppers. Does it make a difference in how the IO
signals are interpreted?

Please someone confirm my assumptions or spoon it out...What I really want
is a diagram that shows which IO_Show.tcl signal numbers go for each par.
port pin.

I hope that I am not exhuasting people's patience. I want to wire this
project correctly.

Pat Riedlinger




----- Original Message -----
From: J Bury <dpm-at-peopleweb.com>
To: Multiple recipients of list <emc-at-nist.gov>
Sent: Monday, May 06, 2002 11:45 PM


>
> Hey there.
>
>  I use EMC with a servo-to-go card. In the INI there is
> a section for specifying which pin certain signals get
> written to or read from. In the emc.ini snippet below there
> appear to be 3 sections ("digital in", "digital out", and
> "analog out"). What STG port do these sections map to
> (Port A, B, C, D, or none of the above)?
>
> Quick example:
>  *IF* "digital out" goes to Port C, and my servo-to-go
>  base address is 0x200 then:
>
>  The effective address of port C becomes 0x200 + 0x404 = 0x604
>
>  So SPINDLE_FOWARD_INDEX occupies bit 1 of the byte
>  at 0x604
>
>  Which I would then read as voltage at the real world pin 13
>  of connector P1
>
>  ..... does this sound right?
>
>
> Im really having trouble relating these ambiguous "INDEX" INI
> variables to physical pins. Can anyone help?
>
>
> -Jason
>
> emc.ini snippet: ----
>
> [EMCIO]
>
> ; digital in bits
>
> ESTOP_SENSE_INDEX         =     1
> LUBE_SENSE_INDEX          =     2
>
> ; digital out bits
>
> SPINDLE_FORWARD_INDEX     =     1
> SPINDLE_REVERSE_INDEX     =     0
> MIST_COOLANT_INDEX        =     6
> FLOOD_COOLANT_INDEX       =     7
> SPINDLE_DECREASE_INDEX    =     8
> SPINDLE_INCREASE_INDEX    =     9
> ESTOP_WRITE_INDEX         =     10
> SPINDLE_BRAKE_INDEX       =     11
>
> ; analog out bits
>
> SPINDLE_ON_INDEX          =     3
>
>
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