On Nov 28, 2007, at 11:23 PM, Klaus Rudolph wrote:
Hi, I am searching for the documentation of gschem and especially for creating subcircuits with geschem. I need a subcircuit 16 times on a pcb, so I want to use that feature. Long time ago I have used it, but could not find any documentation anymore. All what I found is the geda-wiki which contains a lot of dead links and circular links to it self but not the information I need. And yes, I want it in a printable version like pdf or ps. Yes, here are two questions: 1) where is the printable documentation gone 2) how to create subcircuits for gschm->pcb toolchain.
In gschem:Make a symbol representing the subcircuit. Include the attribute source=whatever.sch, where whatever.sch is the schematic of the subcircuit. In whatever.sch, attach input and output symbols from the "io" symbol library. The refdes= attributes of these symbols should match the corresponding pinlabel= attribute of the subcircuit symbol. You may then put in as many of the subcircuit symbols as you wish into your higher level design. Works with other flows, too: you're not restricted to pcb.
Here's a simple example:
Attachment:
SeqCell.sym
Description: Binary data
Attachment:
SeqCell.sch
Description: Binary data
John Doty Noqsi Aerospace, Ltd. http://www.noqsi.com/ jpd@xxxxxxxxx
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