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Multi-bank support #48
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It was supported for a while, but is temporarily removed while we fix some
other issues. I hope to have it added back in the next few weeks or months.
In the interim, you can use two SRAMs and synthesize a mux to select
between the two. It is a little less efficient, but it will work.
Matt
…On Wed, Jul 10, 2019 at 6:42 AM robin-tukl ***@***.***> wrote:
Is it in the current version possible to create a SRAM with more then one
bank? I already tried to add "num_banks = 2" to my "myconfig.py" file. But
this always results in a layout with only one bank. Also i already saw that
the number of banks is not passed to "sram_config". Does that mean that
multi bank is not supported yet?
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Matthew Guthaus
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University of California Santa Cruz
https://www.soe.ucsc.edu/people/mrg
|
Thank you for the fast and helpful response. |
Hello, I am facing an error while trying to generate a multi-bank memory as well, though it is different from the one described above. The error message I get is
I'm not sure how to resolve this. The environment setup seems to be fine, as I am able to generate single-bank memories. My configuration file is attached below for reference.
Thank you :) |
We still haven't fixed multiple bank support. We are adjusting the functionality to introduce soft banks which utilize some synthesized Verilog to do the decode and mux logic rather than a hard layout. This should be available soon as we are testing it and taping one out in sky130. |
Thanks for the prompt response! That's great, I'll look forward to it. |
Any update with this? When this feature will be available? |
@bugraonal is supposed to merge it in. We are planning a major release shortly. |
Is this feature currently supported? I attempted to use the default multi-bank (2 bank) example from the repository (scn4m_subm_sram_32kbyte_1rw1r_2x32x4096_8.py) and encountered the following error during make: ERROR: file simulation.py: line 605: Could not find bl0 net in timing paths. [openram.modules.pdriver/init]: creating pdriver pdriver_7 [openram.base.hierarchy_layout/get_bbox]: Size: 7719.400000000001 x 4238.200000000001 with perimeter margin 0 |
Is it in the current version possible to create a SRAM with more then one bank? I already tried to add "num_banks = 2" to my "myconfig.py" file. But this always results in a layout with only one bank. Also i already saw that the number of banks is not passed to "sram_config". Does that mean that multi bank is not supported yet?
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