<d1b2>
<TomKeddie> @rwhitby Thanks, I haven't been able to keep up with all the changes, will take a look now.
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<d1b2>
<TomKeddie> @rwhitby - looks great, quite a powerful combination of features, thanks for persevering - suggest labelling the USB C connectors (or perhaps an arrow from one to the other?) - am still dubious about the ASA and ASB jumpers striking the glasgow connector, perhaps move them to the edge of the board? - since you're unlikely to use J5 without J9 and J10 without J11 it would be great to have them side by side, I think there is room and the routing seems
<d1b2>
ok - I'm not sure which combinations are valid on J8, would be good to prevent a 5V-GND short by moving them away from each other on the same connector - would be great to see some doco on the underside but perhaps there isn't room.
<d1b2>
<rwhitby> all very good points, will look at the jumper locations. 5V-GND is intentional, so you can plug an external power supply into there if Glasgow doesn't give enough grunt.
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<d1b2>
<rwhitby> @TomKeddie suggestions for the port names? Perhaps lower port is "Test Port" and upper port is "Monitor Port" or something like that? I hope someone else has an idea for better names ...
<d1b2>
<rwhitby> only trouble with moving J10 and J11 is that then there's no space for well-sized silk to label them.
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<d1b2>
<rwhitby> @TomKeddie thanks for pushing for those jumper location changes. it's a better layout as a result of your persistence.
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<d1b2>
<TomKeddie> @rwhitby sorry there isn't more time overlap for us. The new location for the ASA/ASB connectors conflicts with the shroud on the Glasgow pin header. Unfortunately they do need to move to the edge or back to where they were.
<d1b2>
<TomKeddie> @rwhitby am conscious #glasgow is getting noisy so I thought I'd add this here, feel free to respond in #glasgow to keep the flow going. I had a shot at a block diagram for the underside using the schematic editor (every tool is hammer). I think you should renumber your designators to make those J1 J2 and J3 for simplicity. I suggest drop the PORT words from the labels and use larger text, SNOOP and TARGET are fine as labels. Adding the same
<electronic_eel>
i think one point of it is wrong, and that is the location of J9 and J11
<electronic_eel>
when you open J9 or J11, the connection still goes through between the target and snoop ports
<electronic_eel>
it is just the connection to the 1.2/3.3 switch that is disconnected
<electronic_eel>
but i like the idea of putting a simplified version of the schematics on the back
<electronic_eel>
but i think the function of J8 and the VBUS_DFP should be shown too, otherwise reading the labeling on J8 is just confusing
<d1b2>
<rwhitby> I like where all this is going.
<d1b2>
<rwhitby> A7 stub is intentional, for post manuf blue wiring.
<electronic_eel>
ah, ok. but wouldn't you just solder a bodge wire on the through hole connection of the header to glasgow?
<d1b2>
<rwhitby> Will renumber stuff today, now that the functional schematic is stable. Will clean up schematic too.
<electronic_eel>
that would be my first solution, scratching soldermask off is possible, but i wouldn't do it if a nice tht hole is nearby
<d1b2>
<rwhitby> Will change ven pulldown
<d1b2>
<rwhitby> True on A7.
<d1b2>
<rwhitby> I forgot about the soldermask
<d1b2>
<rwhitby> So no more functional changes?
<electronic_eel>
I think this is a good package as it is and don't see any need for changes
<electronic_eel>
getting the silkscreen on the bottom right will maybe take a few rounds of improvement
<d1b2>
<rwhitby> Yep
<electronic_eel>
but that shouldn't interfere with layout or schematics
<d1b2>
<rwhitby> Yes, that is why I cordoned it off.
<d1b2>
<rwhitby> And moved stuff to expand the space
<electronic_eel>
it looked to me like you started with layout relatively soon in your project, so you had to do quite a lot of changes to it to accomodate different schematics
<electronic_eel>
i usually try to nail schematics first with lot's of review rounds and stuff before i start on layout
<electronic_eel>
so i usually just have very minimal changes to schematics once i started layout
<d1b2>
<rwhitby> That was intentional, to get KiCAD and pcb layout practice.
<electronic_eel>
ok, i think you got that
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<d1b2>
<rwhitby> I'm still wary of what I don't know that I don't know on that front.
<electronic_eel>
a lot of layout is practicing. you will get better with every board you do
<d1b2>
<rwhitby> Practice is fine. It's the optimisation function that I'm not sure of.
<electronic_eel>
oh, one thing i just see: you could move the usb connectors out by 1 or 2 millimeters. i think that is the suggested mounting pattern for usb-c connectors
<electronic_eel>
so that you could theoretically put a case around it
<d1b2>
<rwhitby> Ok, I thought I had it that same as Glasgow, but will check.
<electronic_eel>
i just measured 1 mm on my revC2 with the calipers
<electronic_eel>
but better check in the design files, they are probably more accurate
<d1b2>
<rwhitby> Ok
<d1b2>
<rwhitby> Is target and snoop understandable for port labelling?
<electronic_eel>
i think it is good. but i had a deep dive into the schematics of the addon first, so maybe my assessment is not the best for this
<electronic_eel>
you could copy the 3d models of the tvs diode arrays from glasgow
<electronic_eel>
then you'd have a more complete 3d view
<electronic_eel>
greg has worked on making really nice renders of the 3d data
<d1b2>
<rwhitby> I'll need to learn how to do the 3d model in KiCAD stuff.
<electronic_eel>
you just copy over the 3d model file from glasgow. then you go into the footprint editor. there is an option to reference the 3d model file
<electronic_eel>
did you copy the footprint from glasgow? if yes, the 3d model is probably already referenced, but just to a wrong path
<d1b2>
<rwhitby> Will look into this today.
<electronic_eel>
yes, it is the one from glasgow and it references a non-existing path, relative from the current dir
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<d1b2>
<rwhitby> @TomKeddie what rotation and offsets did you use for the extra connector model?
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<d1b2>
<TomKeddie> I posted the wrong image before this one has the correct model highlighted. Y=180 degrees, Z=11mm.