| # I have some trouble when running Openroad tools for foreign pdk. |
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| Tool: Initialize Floorplan |
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| Subcategory: Floorplan initialization issue |
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| ## Conversation |
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| ### OuDret |
| Hello, I have been reading documentation and trying stuff with given pdks for about two weeks. My goal was to run OpenRoadFlowScripts but, since there is a lot of stuff, I’ve took its makefile, config files and scripts and just extracted the openroad commands that I really need, so I can exactly know what args and what files i need and create them. Also running the commands 1 by 1 alongside GUI application helps me understanding what’s going on.
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| When calling the commands tho, I had some issues i could not solve. If you have an idea of any of the following problems I'm facing or any advice let me know.
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| **1. I didn’t manage to initialize floorplan with custom die area. It doesn’t matter which values I use as die_are or core_area, it just doesn’t work properly.**
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| When I run something like the command below, having stdSite size defined as 400 by 400 um it just does nothing. The verilog file provided is a simple inverter already synthesized using yosys into a single NAND cell which size is set in .lef as 200 by 200.
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| <img width="368" alt="Screenshot 2023-09-15 101107" src="https://github.com/The-OpenROAD-Project/OpenROAD/assets/74424277/3e31cb25-5394-40b2-86be-92df69e3e751">
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| Meanwhile, if I just let openroad to decide what size to give it just works for small core utilization value, which kinda makes sense.
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| <img width="356" alt="Screenshot 2023-09-15 101209" src="https://github.com/The-OpenROAD-Project/OpenROAD/assets/74424277/e4fb9b00-9224-44a5-8771-2688296f0bf6">
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| Do you think I’m forgetting any step? The commands I run before getting to that point are the following:
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| ```
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| read_liberty /path/lib/NandCellLibrary.lib
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| read_lef /path/lef/NandCellLibrary.tech.lef
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| read_lef /path/lef/NandCellLibrary.macro.lef
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| read_verilog /path//inverter.v
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| link_design inverter
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| read_sdc /path/constraint.sdc
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| initialize_floorplan -die_area {0 0 10000 10000} -core_area {1000 1000 5000 5000} -site stdSite
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| ```
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| **2. I have no macros stored in odb despite having them declared in lef/NandCellLibrary.macro.lef**
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| If I just use utilization_area **floorplan_initialization** and keep running the following commands all seems to be working properly
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| ```
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| make_tracks met1 -x_offset 10 -x_pitch 10 -y_offset 10 -y_pitch 10
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| make_tracks met2 -x_offset 10 -x_pitch 10 -y_offset 10 -y_pitch 10
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| make_tracks met3 -x_offset 10 -x_pitch 10 -y_offset 10 -y_pitch 10
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| remove_buffers
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| place_pins -hor_layer met2 -ver_layer met3 -random
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| global_placement -density 0.5 -pad_left 0 -pad_right 0
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| ```
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| <img width="343" alt="Screenshot 2023-09-15 101442" src="https://github.com/The-OpenROAD-Project/OpenROAD/assets/74424277/5367aa8f-4e66-4fe4-97b1-a0e7fed6f10d">
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| until I try to run macro placement
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| <img width="350" alt="Screenshot 2023-09-15 101654" src="https://github.com/The-OpenROAD-Project/OpenROAD/assets/74424277/35713305-ea34-4e1e-b481-b7402269ea8e">
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| the error raised means that when running the following tcl procedure it has not found any macro
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| ```
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| proc find_macros {} {
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| set macros ""
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| set db [ord::get_db]
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| set block [[$db getChip] getBlock]
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| foreach inst [$block getInsts] {
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| set inst_master [$inst getMaster]
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| # BLOCK means MACRO cells
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| if { [string match [$inst_master getType] "BLOCK"] } {
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| append macros " " $inst
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| }
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| }
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| return $macros
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| }
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| ```
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| the thing is that I have the NAND macro and another one called FILL defined in my .lefs and .lib . Then why could it be that there is no macro in db ?
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| **Some things to be said.**
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| When running **read_liberty**, it prints 1 into terminal. Does it mean that there’s an error? It seems I can keep running things. If so, is there any way to properly debug it?
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| It also happens if I run **check_status** command after reading all input files, which I didn’t even find in documentation, so I just ignored it.
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| Again, if you had any idea or advice of what I’m doing wrong, if I skipt some important step, etc. let me know, please.
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| If i manage to make it work i will try to post the whole flow command by command. It may help someone someday
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| Thank you.
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| ### maliberty |
| What is the size of stdSite? Is this a PDK you can share or is it proprietary?
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| Do you have any instances of the macro in your netlist? |
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| ### maliberty |
| ```
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| SITE stdSite
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| SYMMETRY Y ;
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| CLASS CORE ;
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| SIZE 500 BY 500 ;
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| END stdSite
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| ```
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| is a huge site (500um x 500um) - I'm guessing that is a mistake though it doesn't explain the problem. |
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| ### maliberty |
| Your LEF is missing the units for " DATABASE MICRONS \<val\>;". There is a bug when this is unspecified that I'll fix but you should set it (the LEF default value is very old). |
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