Hi folks. I am making a full size keyboard using the RP2040 Hardware Design. I adapted a prototype board that had a similar issue and posted about it here: viewtopic.php?t=368240.
From what I can tell with a multimeter, the 1.1v DVDD trace is floating, and thus the board does not communicate with the PC at all.
From my testing it seems:
* The crystals, RP2040, and flash chip, all work when swapped onto the prototype board.
* The crystal does not oscillate.
* 1.1v net is floating.
* 3.3v and VBUS nets are both at normal voltage.
* There are no short circuits.
I am really lost as to what the problem could be, so any help is greatly appreciated!
Here are some screenshots of the PCB in KiCad:
Top and bottom of board with 1.1v net highlighted
Image may be NSFW.
Clik here to view.
Image may be NSFW.
Clik here to view.
Top and bottom of board with 3.3v net highlighted
Image may be NSFW.
Clik here to view.
Image may be NSFW.
Clik here to view.
Schematic:
Image may be NSFW.
Clik here to view.
Image may be NSFW.
Clik here to view.
Image may be NSFW.
Clik here to view.
Image may be NSFW.
Clik here to view.
A picture of me probing between 1.1v and gnd:
Image may be NSFW.
Clik here to view.
And I am not sure if it helps, but here is a screenshot of my working prototype:
Image may be NSFW.
Clik here to view.
From what I can tell with a multimeter, the 1.1v DVDD trace is floating, and thus the board does not communicate with the PC at all.
From my testing it seems:
* The crystals, RP2040, and flash chip, all work when swapped onto the prototype board.
* The crystal does not oscillate.
* 1.1v net is floating.
* 3.3v and VBUS nets are both at normal voltage.
* There are no short circuits.
I am really lost as to what the problem could be, so any help is greatly appreciated!
Here are some screenshots of the PCB in KiCad:
Top and bottom of board with 1.1v net highlighted
Image may be NSFW.
Clik here to view.

Image may be NSFW.
Clik here to view.

Top and bottom of board with 3.3v net highlighted
Image may be NSFW.
Clik here to view.

Image may be NSFW.
Clik here to view.

Schematic:
Image may be NSFW.
Clik here to view.

Image may be NSFW.
Clik here to view.

Image may be NSFW.
Clik here to view.

Image may be NSFW.
Clik here to view.

A picture of me probing between 1.1v and gnd:
Image may be NSFW.
Clik here to view.

And I am not sure if it helps, but here is a screenshot of my working prototype:
Image may be NSFW.
Clik here to view.

Statistics: Posted by naquino14 — Wed Oct 02, 2024 12:41 am