open-source-silicon.dev

How can I get the coordinates of a given port name in the currently selected subcell?

Indirectly.  Say the port name is "A".  Then:
```goto A
box```
If you want to pass back the coordinates to do something with in another command, then
```set rect [box values]```
This will give you the coordinates of the box shape to which the label is attached.  If you want a point, then you will have to compute the center or use the lower left corner.  Values will be in internal coordinates;  you can convert from internal units to microns using `magic::i2u &lt;value&gt;`.

Thanks Tim! It doesn't seem to work for a label inside a subcell.

What I'm basically trying to do is:

I have two subcells, and I want to connect their `clk` port together by drawing a metal2 wire via a script

so that's why I need to get the coordniates of the `clk` ports that are inside the subcells

`goto instance_0/clk`, then, where `instance_0` is the instance name, and do the same thing, then `goto instance_1/clk`, repeat.

Awesome! I see that there's also a `corner` command that helps me do L shapes when routing. Are there any other commands that are similarly useful when I lay down wires through a scripts?

This is what the code currently looks like:

```proc port_coords {name} {
  goto $name
  set coords [box values]
  return [list [magic::i2u [lindex $coords 0]] [magic::i2u [lindex $coords 1]] [magic::i2u [lindex $coords 2]] [magic::i2u [lindex $coords 3]]]
}

# Route clk net
goto x2/clk
box grow left 1u
paint metal1
goto x3/clk
box grow left 1u
paint metal1
set start_point [port_coords x2/clk]
set end_point [port_coords x3/clk]
box [lindex $start_point 0]u [lindex $start_point 3]u [lindex $end_point 2]u [lindex $end_point 1]u
box move left 1u
paint metal1```

this is what the resulting wire looks like:

image.png

so the code works, but there might be an easier way I'm missing

`wire segment &lt;layer&gt; &lt;width&gt; &lt;x1&gt; &lt;y1&gt; &lt;x2&gt; &lt;y2&gt; [-noendcap]`

The interactive wiring in magic is just a loop around a set of command options for the command `wire`, so it can be scripted as well as done interactively, although I have not tried that approach before.

There is also the command `polygon &lt;layer&gt; &lt;x1&gt; &lt;y1&gt; &lt;x2&gt; &lt;y2&gt; ...`

(I just tried using the interactive commands and the problem is that they behave according to the pointer position, and I think this is an issue with `logcommands` meaning that I am missing command options to make the interactive wiring able to be logged, which would require the ability to express the statement with a cursor position, like `wire horizonal at 500 0`.  But that doesn't exist and won't until I code it up.)