Hello Everyone I am running my Verilog code using openroad f open-source-silicon.dev #openroad

Hello Everyone, I am running my Verilog code using...

Deepak

07/12/2023, 1:54 PM

Hello Everyone, I am running my Verilog code using openroad flow for RTL2GDS. I got this error(attached image) in floorplan stage. I did not get what needs to be done to debug the strap width issue with metal 4? Any suggestions??

Mitch Bailey

07/12/2023, 4:55 PM

Maybe use a fixed die area in the

config.json

file? Example

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"DIE_AREA"                 : "0 0 900 600",

Deepak

07/13/2023, 4:32 AM

@Mitch Bailey, it have added this in my config... same issue still persists

Vijayan Krishnan

07/13/2023, 6:08 AM

@Deepak Are you using latest ORFS?

Deepak

07/13/2023, 6:10 AM

I have installed it two months back

Vijayan Krishnan

07/13/2023, 6:12 AM

Update once try again. Same problem mean share a test case by running

make pdn_issue

Deepak

07/13/2023, 6:57 AM

ok will update you after updating ORFS

Deepak

07/13/2023, 2:38 PM

pdn_ripple_sky130hd_base_2023-07-13_18-46.zip

Michael Strothjohann

07/14/2023, 12:56 PM

Its a very small design. 'export CORE_UTILIZATION = 1' solves your problem (instead of your 'export CORE_UTILIZATION = 60'). Alternatively, you can leave CORE_ULITIZATION undefined.

Vijayan Krishnan

07/14/2023, 1:05 PM

@Deepak Can you share your

<http://config.mk|config.mk>

Vijayan Krishnan

07/14/2023, 1:09 PM

it is tiny design. It has only 2 std cells. If you go with CORE_UTILIZATION it size only 8x8um. It is not valid to place power grid with default flow. So comment that variable and use

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export DIE_AREA   = 0 0 100 100
export CORE_AREA  = 10 10 90 90

<http://config.mk|config.mk>

and run the flow again

Vijayan Krishnan

07/14/2023, 1:17 PM

seems you define

export CORE_AREA='100 100 900 900'

, but automated flow give priority to

CORE_UTILIZATION

variable. So remove this from

<http://config.mk|config.mk>

and try again with only

DIE_AREA

and

CORE_AREA

variables

Deepak

07/14/2023, 1:20 PM

okay, Now i have put these in config file and commented DIE AREA and CORE AREA ,it is running the flow till end

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export CORE_UTILIZATION  = 30
export CORE_ASPECT_RATIO = 1
export CORE_MARGIN       = 2
export PLACE_DENSITY     = 0.70

Deepak

07/14/2023, 1:20 PM

Thanks @ @Vijayan Krishnan, @Michael Strothjohann

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