Sky130 and OpenRoad Tutorial Error while Make Par

[J W]

Hello,

I'm following the Sky130 + OpenROAD Tutorial and I'm getting this error message during the Place-and-Route process:

"create_clock clock_uncore_clock -name clock_uncore_clock -period 20.0"

"[ERROR STA-0489] pin 'clock_uncore_clock' not found."

"Error: clock_constraints_fragment.sdc, 1 STA-0489"

I'm strictly following the steps and I don't know why the clock pin is not found. Please help.

Thank you!

[Yinuo Wang]

I found out the problem. The clock name should be "clock_uncore" instead of "clock_uncore_clock" in all the yml config files. Now I ran into a different error.

```
[par] [Exec ...d/bin/openroad -no_init -log /...] (hammer) detailed_placement
[par] [Exec ...d/bin/openroad -no_init -log /...] [INFO DPL-0034] Detailed placement failed on the following 2 instances:
[par] [Exec ...d/bin/openroad -no_init -log /...] [INFO DPL-0035]  system/tile_prci_domain/element_reset_domain_rockettile/frontend/icache/data_arrays_0_0/data_arrays_0_0_ext/mem_0_0
[par] [Exec ...d/bin/openroad -no_init -log /...] [INFO DPL-0035]  system/tile_prci_domain/element_reset_domain_rockettile/frontend/icache/tag_array_0/tag_array_0_ext/mem_0_0
[par] [Exec ...d/bin/openroad -no_init -log /...] [ERROR DPL-0036] Detailed placement failed.
[par] [Exec ...d/bin/openroad -no_init -log /...] Error: par.tcl, 299 DPL-0036
```

[Zhi Lin Tan]

Hi, I'm currently working on this as well and facing the same issue too. 

Will update to here once I had solved it, hope to get good news from you

[Zhi Lin Tan]

Hi, 

I found out that there is a conversation in this group had been discussed about these issues before.

The link is attached as below:
Hammer fails on PAR using OpenROAD + sky130 tutorial (google.com)

[Yinuo Wang]

Hello,

Thanks for the link. Although it doesn't really solve the problem. Are you having the the same detailed placement error?

[Zhi Lin Tan]

Hi,

I had figured out that the error is due to the lack of macro_placement throughout the Hammer flow.
I noticed this by using the step-by-step command on OpenRoad to analyze the TCL file used for PAR.

But still, I don't know how to configure the Hammer configuration file to generate the macro_placement for the design.

[Yinuo Wang]

The Maroc placement detail is configured in VLSI/example-designs/sky130-openroad.yml. Have you tried to modify some of the parameters in there?

[Alex Manley]

Hey guys,

I've run into the same issue with the failed detailed placement.
Any discoveries since the last update?

Best,

Alex

[Arun Ravindran]

Hi

I am facing the same issue of clock_uncore_clock and once the it is renamed to clock_uncore the placement failed.

Do you have any solution to this?

I am following the example as in the tutorial, but it looks like something is broken

regards

Arun