Issue with GF180 PDK and symbols import into Xschem and incompatibility with definitions in sm141064.spice

[spnadig]

Expected Behavior

ngspice needs to run with no errors

Actual Behavior

error:

NETLIST

sch_path: /usr/local/google/home/nigelcoburn/MixedSignal/Designs/TopLevel_oscillator.sch .subckt TopLevel_oscillator X1 VDD GND Vout Vin Buffer Vdd VDD GND 1.8 .save i(vdd) Vin Vin GND pulse(0 1.8 1ns 1ns 1ns 4ns 10ns) .save i(vin) **** begin user architecture code

blabla

.tran 0.01n 1u .saveall

name=TT_MODELS1 only_toplevel=false .include /usr/local/google/home/nigelcoburn/MixedSignal/silicon-env/share/pdk/gf180mcuC/libs.tech/ngspice/design.ngspice .lib /usr/local/google/home/nigelcoburn/MixedSignal/silicon-env/share/pdk/gf180mcuC/libs.tech/ngspice/sm141064.ngspice typical

** end user architecture code .ends

• expanding symbol: Designs/Buffer.sym # of pins=4 sym_path: /usr/local/google/home/nigelcoburn/MixedSignal/Designs/Buffer.sym sch_path: /usr/local/google/home/nigelcoburn/MixedSignal/Designs/Buffer.sch .subckt Buffer VP VN Y A .iopin VP .iopin VN .ipin A .opin Y X1 VP VN net1 A Inverter X2 VP VN Y net1 Inverter .ends

• expanding symbol: Designs/Inverter.sym # of pins=4 sym_path: /usr/local/google/home/nigelcoburn/MixedSignal/Designs/Inverter.sym sch_path: /usr/local/google/home/nigelcoburn/MixedSignal/Designs/Inverter.sch .subckt Inverter VP VN Y A .ipin A .iopin VP .iopin VN .opin Y XM3 Y A VP VP pfet_03v3 L=0.28u W=0.22u nf=1 ad='int((nf+1)/2) W/nf 0.18u' as='int((nf+2)/2) W/nf 0.18u'

• pd='2int((nf+1)/2) (W/nf + 0.18u)' ps='2int((nf+2)/2) (W/nf + 0.18u)' nrd='0.18u / W' nrs='0.18u / W'

• sa=0 sb=0 sd=0 m=1 XM4 Y A VN VN nfet_03v3 L=0.28u W=0.22u nf=1 ad='int((nf+1)/2) W/nf 0.18u' as='int((nf+2)/2) W/nf 0.18u'

• pd='2int((nf+1)/2) (W/nf + 0.18u)' ps='2int((nf+2)/2) (W/nf + 0.18u)' nrd='0.18u / W' nrs='0.18u / W'

• sa=0 sb=0 sd=0 m=1 .ends

.GLOBAL GND .GLOBAL VDD .end

Steps to Reproduce the Problem

Specifications

• Version:
• Platform:

[proppy]

@msaligane did you have it for OpenFASoC?

[spnadig]

edit - to be clear, the error persists after deleting line blala from netlist. the issue is we cannot find symbols for devices example - pmos3p3 in our components-> /devices which is consistent with sm141064.spice

[mithro]

Could this be related to https://github.com/google/globalfoundries-pdk-libs-gf180mcu_fd_pr/pull/6 ?

[msaligane]

@proppy We do not use a schematic editor in the normal openfasoc flow.

If it is regarding "blabla", yes, my student encountered this error before, but it was resolved. If there is a syntax error while specifying the ngspice model path this happens.

[spnadig]

@proppy - this is the path we use

@msaligane - we cannot find pfet03v3 nfet03v3 under components ->/devices like you do in your designs. Did you do something specific in your PDK imports to xschem? Our 0_top.sch has test_pfetxxx and these symbols have no terminals and I cannot use them in my schematics

[msaligane]

Are you using an old version of the PDK? The naming rule is different, in that repo, check pmos_3p3 and nmos_3p3.

We are using the latest version installed by volare. This is the version of gf180pdk: b8c6129fb60851c452a3136c2b8c603bb92cb180

@madhulikal @StanleyAlwaysLoveYou - can you please help? Thanks!

[proppy]

@spnadig can you print the result of:

conda list | grep open_pdks
find $CONDA_PREFIX/share/pdk

[spnadig]

@proppy - dump.txt

[madhulikal]

@spnadig - This syntax should help resolve the issue without manually deleting 'blabla' everytime. format="tcleval(@value )" value=".lib and .include model filepaths".

Also, can you check if the path of device models in xschemrc file is referencing to the correct pdk? In older version too, if the xschemrc file is correct, this error should be resolved.

[proppy]

I think the path to the model in xschemrc needs to be fixed with:

sed -i -e 's/ngspice\/models/gf180mcuC\/libs.tech\/ngspice/'   ~/silicon-env/share/pdk/gf180mcuC/libs.tech/xschem/xschemrc 

[proppy]

Fixed with https://github.com/google/globalfoundries-pdk-libs-gf180mcu_fd_pr/pull/91