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| so-offish | How do I add an attributes to a cell, such that I can use Python to place them? | 17:09 |
|---|---|---|
| so-offish | there's a bit of Python in Claire's presentation: if "ringosc" in cellinfo.attrs: -> how do I add an attribute like that? | 17:09 |
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| so-offish | I figured out where that bit of code (in Claire's presentation) was from - it was from an ice40 example of floorplanning. I'm investigating now (this is just so if anyone looks at the log later) | 17:26 |
| so-offish | The code to pass the attribute (from the Verilog, to the backend for use later, is here: https://github.com/gatecat/nextpnr-xilinx/blob/e69bbf9e32bf072918158d1de23da3f1c59fcf7d/ice40/examples/floorplan/floorplan.v) | 17:27 |
| jix_ | so-offish: that "(* ringosc *)" is the standard verilog syntax for an attribute, or are you asking how to add attributes that are not already in the source? | 17:30 |
| so-offish | Honestly I didn't know that - I've only used attributes that had some effect in synthesis/routing, I had no idea you could just make your own attribute up and pass it to the back end (say for placement) | 17:31 |
| so-offish | jix_ sorry forgot to add your name to the start | 17:32 |
| so-offish | jix_ Like I didn't know you could do (* my_special_block *) and then do something with it. :) | 17:32 |
| jix_ | yeah I wasn't sure whether you knew and were asking for something different or not, which is why I did explicitly mention that this is standard syntax :) | 17:35 |
| so-offish | jix_: Thank you for taking the time to clarify, I appreciate it. :) | 17:40 |
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| so-offish | It was a good day for ECP5 ring oscillators. | 22:51 |
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