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From:	Mike Bushroe <mbushroe AT gmail DOT com>
Date:	Sun, 16 Nov 2014 12:21:00 -0700
Message-ID:	<CA+CyYa1+9Cgv7BTMKWKcRyNidZfYoW8LMqJAjyBG1QtmT2LRYQ@mail.gmail.com>
Subject:	[geda-help] Hierarchical Sheets sharing slots on a single chip
To:	geda-help AT delorie DOT com
Reply-To:	geda-help AT delorie DOT com

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gschem 1.8.2 (g875406c)
gsch2pcb 1.6
xgsch2pcb 0.1.3
pcb version 20140316 Compiled on Aug 29 2014 at 07:56:58
Ubuntu 14.10 (just up from 10.04 through 12.04)
Toshiba 5.7GiB Core 2 Duo 2.2GHzx2 64bit

I am trying to make a single phase to 3 phase inverter. There is a
wonderful chip that seems to made exactly for this purpose. It has 3 slots,
one for each phase. However, the power conditioning on the chip only needs
to be done once, and the inputs have to be level shifted with
opto-isolators so that is a lot of 'per-channel' "stuf" between the control
circuitry and the 3phase driver, and then *lots* more stuff on the output
side with the high and low N-channel MOSFETS, back EMF diodes, caps, dummy
load resistors, analog reference voltage, and leg active LED. So the slot
for each leg of the 3phase has lots of distinct components for each leg to
go in the sub-schematic page, but it wants to make 4 separate footprtints
for the single device with one per phase plus one for the main sheet. Is
there a way yet to have the actual foot print and power connections
instance of the chip be on the top page, and then some way to tell each
instance of the sub-schematic which slot to use internally?

  Currently the symbol for a slotted part is just a template for each
instance of the slot with the power, chip select, etc pins being hidden. Is
there some way, or plans to add a way to have an extra slot defenition that
would not show the signal pins but would show the power and other pins?
Using the current symbol build process (using gschem, but probably
comparable ways scritps) to put both power and signal pins in the symbol
"template", then have 'p' or '0' slot that listed only the power pins and
the remaining slots list just the I/O pins and then gschem would only
display the portion of the symbol 'template' that was needed for the
current slot type.

Allowing different patterns of special pins for special slots would
probably open up other special devices for similar separation of repeated
slot usages from single power, chip select, level-shift or other special
controls.  Being able to control which instance of a sub-schematic used
which slot of a multi-slot device would allow 4 sub-sections to use only 1
slot each of a quad logic gate instead of using a whole chip per instance.

Once again there is probably already a way to do this that I just haven't
found yet. If someone could point me to the right section of the proper
webpage I will go back to studying the tutorials and manuals to try and fix
what I have. Thanks again for all the help.
--=20
"Creativity is intelligence having fun." =E2=80=94 Albert Einstein

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<div dir=3D"ltr"><br clear=3D"all"><div><div>gschem 1.8.2 (g875406c)<br>gsc=
h2pcb 1.6<br>xgsch2pcb 0.1.3<br>pcb version 20140316 Compiled on Aug 29 201=
4 at 07:56:58<br>Ubuntu 14.10 (just up from 10.04 through 12.04)<br>Toshiba=
 5.7GiB Core 2 Duo 2.2GHzx2 64bit<br><br></div>I
 am trying to make a single phase to 3 phase inverter. There is a=20
wonderful chip that seems to made exactly for this purpose. It has 3=20
slots, one for each phase. However, the power conditioning on the chip=20
only needs to be done once, and the inputs have to be level shifted with
 opto-isolators so that is a lot of &#39;per-channel&#39; &quot;stuf&quot; =
between the=20
control circuitry and the 3phase driver, and then <i>lots</i> more stuff
 on the output side with the high and low N-channel MOSFETS, back EMF=20
diodes, caps, dummy load resistors, analog reference voltage, and leg=20
active LED. So the slot for each leg of the 3phase has lots of distinct=20
components for each leg to go in the sub-schematic page, but it wants to
 make 4 separate footprtints for the single device with one per phase=20
plus one for the main sheet. Is there a way yet to have the actual foot=20
print and power connections=C2=A0 instance of the chip be on the top page,=
=20
and then some way to tell each instance of the sub-schematic which slot=20
to use internally?<br><br>=C2=A0 Currently the symbol for a slotted part is=
=20
just a template for each instance of the slot with the power, chip=20
select, etc pins being hidden. Is there some way, or plans to add a way=20
to have an extra slot defenition that would not show the signal pins but
 would show the power and other pins? Using the current symbol build=20
process (using gschem, but probably comparable ways scritps) to put both
 power and signal pins in the symbol &quot;template&quot;, then have &#39;p=
&#39; or &#39;0&#39;=20
slot that listed only the power pins and the remaining slots list just=20
the I/O pins and then gschem would only display the portion of the=20
symbol &#39;template&#39; that was needed for the current slot type. <br><b=
r>Allowing
 different patterns of special pins for special slots would probably=20
open up other special devices for similar separation of repeated slot=20
usages from single power, chip select, level-shift or other special=20
controls.=C2=A0 Being able to control which instance of a sub-schematic use=
d=20
which slot of a multi-slot device would allow 4 sub-sections to use only
 1 slot each of a quad logic gate instead of using a whole chip per=20
instance.<br><br></div>Once again there is probably already a way to do=20
this that I just haven&#39;t found yet. If someone could point me to the=20
right section of the proper webpage I will go back to studying the=20
tutorials and manuals to try and fix what I have. Thanks again for all=20
the help.<br>-- <br><div class=3D"gmail_signature"><div dir=3D"ltr"><span s=
tyle=3D"font-family:arial,sans-serif;font-size:11pt">&quot;Creativity is in=
telligence having fun.&quot; =E2=80=94 Albert Einstein</span></div></div>
</div>

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