[SOLVED] All GND pins on components connected to 1V0!

Layout
1

Hi,

I am trying to add a 1V0 power port to power my FPGA (Artix 7 35k cells) as shown below:

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When I run pcbnew to layout the board and read the generated netlist, for some reason the report says all GND component pins were changed to 1V0.

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J2 is supposed to be GND, but is assigned to 1V0

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Could someone please help me out.

Thank You

2

Somewhere you have accidentally connected 1V0 to GND. Without access to the schematic we are no wiser than you are.

3

Try dragging the components between 1V and Gnd to see if there is a wire underneath

4

@bobc, @davidsrsb here is my schematic pdf

schematic_latest.pdf (1005.8 KB)

and a zip of the complete project, we are trying to modify the hackrf one to include an fpga.

noob-sdr.7z (2.4 MB)

I did that there is no wire between 1V and GND.

5

*cough*

6

By searching for “1.0V”, I found you have +1.0V connected to GND here:

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If you have two labels on the same net, KiCad picks one of them semi-randomly. So although the bug was already there, adding a new occurrence of +1.0V exposed it.

You might wonder why having different power labels on the same net doesn’t flag big red warnings, and that is a good point. I think the handling of labels and power symbols could definitely be improved.

Joan ninja’d me :slight_smile:

I would also wonder why VMGTAVCC is connected to GND… I don’t think that is what the datasheet recommends!

7

And the net highlighting in the nightly builds helps find this sort of error too.

1 Like
8

oops, thank you very much everyone.

9

I am not really using the GTP, which is why I connected it to ground.

10

Looks like you owe to @Joan_Sparky, and @bobc, and @John_Pateman a serving of their favorite malt beverage, to ensure that neither your co-workers nor your supervisor learns of this incident from them!

Dale

11

Yeah, I do owe you guys a malt :grinning:, although I think it might go bad if I have to mail it you from Bangalore. So the next best thing is probably this @davidsrsb, @Joan_Sparky, @bobc, @John_Pateman, @dchisholm

1 Like