cancel
Showing results for 
Search instead for 
Did you mean: 
Visitor
Visitor
284 Views
Registered: ‎07-26-2018

Why are cells hidden in a DCP

We are using write_checkpoint to save a DCP, but all the cells are flattened and "hidden".  Do you know how to disable "hidding" of cells in a DCP?

0 Kudos
5 Replies
Highlighted
Moderator
Moderator
276 Views
Registered: ‎01-16-2013

Re: Why are cells hidden in a DCP

@jszefer 

 

Can you share the snapshot showing cells present in the project before writing checkpoint and missing when using DCP? Does the design has modules that are encrypted? When doing write_checkpoint, do you see any warnings in log file?

 

--Syed

---------------------------------------------------------------------------------------------
Kindly note- Please mark the Answer as "Accept as solution" if information provided is helpful.
Give Kudos to a post which you think is helpful and reply oriented.

Did you check our new quick reference timing closure guide (UG1292)?
---------------------------------------------------------------------------------------------
0 Kudos
Highlighted
Visitor
Visitor
272 Views
Registered: ‎07-26-2018

Re: Why are cells hidden in a DCP

Hi, I found there is a "flatten_hierarchy" command in one of the tcl scripts, if you run vivado with flatten_hierarchy enabled, could that result in the cells showing up as 'hidden' in the DCP?  We are not having any encrypted modules for this part.  There are no warnings when writing checkpoint.  Thanks!

0 Kudos
Highlighted
Moderator
Moderator
262 Views
Registered: ‎01-16-2013

Re: Why are cells hidden in a DCP

@jszefer 

 

What was the value set for flatten_hierarchy? If the value is set to full then you will see nets and leaf cells under top module name. 

When you say hidden, do you see "?" symbol or the module is missing?

 

--Syed

---------------------------------------------------------------------------------------------
Kindly note- Please mark the Answer as "Accept as solution" if information provided is helpful.
Give Kudos to a post which you think is helpful and reply oriented.

Did you check our new quick reference timing closure guide (UG1292)?
---------------------------------------------------------------------------------------------
0 Kudos
Highlighted
Visitor
Visitor
187 Views
Registered: ‎07-26-2018

Re: Why are cells hidden in a DCP

Hi, thanks for reply.  The modules are missing, when using get_cells or get_nets commands, we can only see the leaf modules in our original design.  We will try -flatten_hierarchy=none to see if that helps.

0 Kudos
Highlighted
Visitor
Visitor
138 Views
Registered: ‎07-26-2018

Re: Why are cells hidden in a DCP

Hi, setting '-flatten_hierarchy none' does not help.  The cells and nets are hidden in the DCP and whole module seems to be flattened.

0 Kudos