Debug Backplane Fixes (RevB errata)

[adkinsjd]

• Switch module 1 and 0 programming silkscreen (light is still correct)

[adkinsjd]

• Probably should put default off resistors on the debug LEDs

[adkinsjd]

• Nit - put the programming signals in order
• Move silkscreen out to accommodate a knurled knob

[adkinsjd]

• A big 5V warning. maybe a protection circuit

[ppannuto]

Moving from #26 here:

• Add LED for fake radio module.

[ppannuto]

• Deal with USB Hub Reset problem
  

[brghena]

USB Hub Reset

Reboot: Hub still good
Power cycle (with ten seconds physically powered off): Hub still good

I'm guessing just asserting BackplaneReset at boot will be sufficient

[bradjc]

• Doesn't say "Signpost"
• Module 0, Module 1, Controller font are not the same size.
• "MEM" -> "Storage"
• What is the empty programming switch position for?
• Move the JTAG header to the top of the board.

[brghena]

• No easily accessible ground post for probing (Oscilloscope alligator clippy thing is too big for any of the 0.1" debug headers)

[adkinsjd]

Literally every screw? Or the 4 gnd testpoints at various spots on the board?

…

On Feb 20, 2017 1:21 PM, "Branden Ghena" ***@***.***> wrote: - No easily accessible ground post for probing — You are receiving this because you were assigned. Reply to this email directly, view it on GitHub <#23 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AGIJUMtfpqvZRFuCBSI_kr8sG2lFymzuks5regPLgaJpZM4LyRZM> .

[brghena]

Sorry, first message was unclear. I edited it to include the real intent, which is the ground connections on oscilloscope leads, which are too big and would short to other pins on the 0.1" headers and cannot latch on to round-headed screws.

[ppannuto]

I'm a fan of the ground bar-like thing. Draw a rectangular poly of exposed ground metal along the edge so that leads can just clip to the pcb.