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How are the power and ground routed from `user_project_wrapper` to `user_proj_example`? They both ha...
# caravel
m
How are the power and ground routed from 
user_project_wrapper
to 
user_proj_example
? They both have the 
vccd*, vdda*, vssd*, vssa*
connections, but these signals don't connect to any gates. The actual power connections in 
user_proj_example
are VPWR and VGND, but show up as floating in the extracted abstract 
user_project_wrapper/runs/user_project_wrapper/results/magic/user_project_wrapper.spice
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+ wbs_sel_i[2] wbs_sel_i[3] wbs_stb_i wbs_we_i mprj/VPWR mprj/VGND user_proj_example
t
I'm not sure this is finalized yet. There was some change yesterday but don't think they are final yet.
General idea is that the 
user_proj_example
exposes contacts on 
met4
and doesn't use 
met5
at all (so no horizontal straps). Then when the PDN grid is generated in 
user_project_wrapper
during the drawing of all the horizontal 
met5
straps, every time it goes over a 
met4
exposed contact by the macro, it adds a via down.
Of course that relies on the fact you have large enough grid in your project so that large contacts are exported to span the pitch between contacts ...
m
@Anish I don't think caravel/user_project_wrapper LVS is possible until the power is connected.
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