Wednesday, 2020-11-11

« Tuesday, 2020-11-10 Index Thursday, 2020-11-12 »
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-_whitenotifier-f- [symbiflow-arch-defs] HackerFoo opened issue #1768: CI is broken - https://git.io/JkIw109:28
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-_whitenotifier-f- [sphinx_symbiflow_theme] mithro opened issue #45: Todo block not being themed? - https://git.io/JkLEg18:02
sf-slack4<olof.kindgren> I installed the quicklogic SymbiFlow 1.3.0 version on a new computer and have some issues. 1) All the tools now seem to have a symbiflow_ prefix which means the Edalize backend is broken 2) The Block RAM rules still require 50% efficiency despite the release notes says this was changed19:10
sf-slack4<kgugala> @olof.kindgren I was pretty sure the RAM fix was merged. I'll take a look at this19:34
sf-slack4<kgugala> sorry for the name change - this is to make QL toolchain in line with xc7 one19:35
sf-slack4<kgugala> will open a PR fixing edalize19:35
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sf-slack4<olof.kindgren> Thanks @kgugala20:14
sf-slack4<olof.kindgren> Damn.Now I'm facing my next problem. I had a somewhat complicated way of programming the board with a custom bistream but I forgot how I did it20:15
sf-slack4<kgugala> updating BS in a binary?20:15
sf-slack4<kgugala> I recall we discussed this some time ago20:15
sf-slack4<olof.kindgren> I think there was a python command that turned my bitstream into a .h file in the helloworld example project and then recreated the combined hw/sw image20:16
sf-slack4<kgugala> yes, there is sth like that20:16
sf-slack4<olof.kindgren> Yes, we talked about it, but I don't think I ever wrote down how I did it and now it's lost from my bash history20:16
sf-slack4<kgugala> IRC channel is publically logged20:17
sf-slack4<kgugala> and slack channel is bridged with IRC20:17
sf-slack4<olof.kindgren> Ok, got it. I run this from the GCC_Project subdir `cp ~/projects/serv/workspace/build/servant_1.0.2/quickfeather-symbiflow/servant_qf.bit ../fpga/rtl/build/helloworldfpga.bit && rm ../fpga/rtl/helloworldfpga_bit.h && make`20:33
sf-slack4<olof.kindgren> Oh, and don't forget to change pincfg_table.c to pass control of the user button to the FPGA20:33
sf-slack4<olof.kindgren> Now I just need to remember how to run the programmer20:34
sf-slack4<olof.kindgren> Oh, come on `ModuleNotFoundError: No module named 'serial.tools'`20:35
sf-slack4<olof.kindgren> Ahh, I had the conda stuff on the path so it picked that python version20:37
sf-slack4<olof.kindgren> Worked from a fresh terminal20:38
sf-slack4<olof.kindgren> Still have this weird issue where I need to replug the board. Otherwise the programmer takes like a minute before it starts programming20:43
sf-slack4<olof.kindgren> ehm.. what the hell is going on here. My gclkbuff, and with that pretty much all logic, gets removed20:55
sf-slack4<kgugala> can you link to the desing?20:56
sf-slack4<olof.kindgren> Here you go. I checked the json file with netlistsvg and it seems like Sys_Clk0 isn't connected in the json file21:03
sf-slack4<olof.kindgren> Does this work?21:04
sf-slack4<olof.kindgren> Tried to paste a link to the svg, but the url was 25000 characters too long :)21:04
sf-slack4<olof.kindgren> There's not even any mention of removing Sys_Clk0 in the yosys log so I really don't know what's going on21:06
sf-slack4<kgugala> yep, I have the file21:10
sf-slack4<olof.kindgren> ok, so it looks like if I use the clk wire in the toplevel it will stop optimizing it away21:19
sf-slack4<olof.kindgren> But I'm not completely sure about this21:20
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sf-slack4<olof.kindgren> Hm... I'm starting to worry that the problem might be related to default parameter values. In that case SERV won't run until we get rid of the symbiflow_synth bash script and call yosys directly21:40
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sf-slack4<olof.kindgren> ok, so it seems I'm not reading back the expected values from the on-chip RAMs. Is preloading memories supported?21:43
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sf-slack4<olof.kindgren> I'm not completely sure about this, since I'm doing debugging with a LED that gets lit up on different conditions. The one I'm checking now is to see if the first instruction gets read back and if it is the expected opcode with this `(wb_ibus_adr == 32'h00000000) & wb_ibus_cyc & wb_ibus_ack & (wb_ibus_rdt == 40000537)`21:46
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sf-slack4<olof.kindgren> This one fails21:46
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sf-slack4<olof.kindgren> It works if I remove the wb_ibus_rdt condition, which makes me suspect it's not reading the correct instruction from RAM21:47
sf-slack4<olof.kindgren> It also fails if I change wb_ibus_adr to 4, which indicates it never tries to fetch another instruction21:47
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sf-slack4<olof.kindgren> I give up for now. Perhaps I need to do some netlist simulations. I really have no idea what's going on22:08
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