Hi everyone I asked this already in a

Question

Hi everyone I asked this already in < C016G7Z8GDR|general> and was redirected here so here is my question again I have a problem with OpenLane and building a VERY small example It fails with an error message during Generating PDN process The log is attached The two core error messages are Error cannot open openroad which seems to be normal and Unexpected error can t read stripe locs met4 GROUND no such element in array I tried the process using these two guides Both fail with the same error However the make test worked flawlessly What I basically did $ flow tcl design my design init design config Edit designs my design src my design v see attached file $ flow tcl design my design Any suggestions

Fabian Schwartau · Answer

Syntax highlighting in Slack helps I had a typo its input not intput Strange message for a syntax error

Fabian Schwartau · Answer

Now PDN passes and he failes with Error Util exceeds 100 Please double check your die row size

Fabian Schwartau · Answer

To solve my own problem The die size was not large enough basically what the messaged said but figuring out how to increase it was a pain In the end please correct me if there are better solutions I added these two lines to my config tcl set env FP SIZING absolute set env DIE AREA 0 0 30 50 Interestingly the die area has to be given in mm here instead of µm what the documentation says Then I came accross a second error complaining that the clk net was not found Although it existed it was not considered a clock net because it was driving only a single target which is correct for my very small design So I added a second input and output pin connected them though a flip flop in the verlog code and everything works now slightly smiling face

aryap · Answer

have you seen this you could have tried changing the PDN pitch offset too <https github com efabless openlane wiki>

Fabian Schwartau · Answer

There should be a wiki with all the abbreviations used throughout this project I am completely new to chip design and I noticed that OpenLane is not the right place to start with

Fabian Schwartau · Answer

So yes I saw that page but it does not help me yum