Stats

  • Locked Locked
  • Replies 10
  • Subscribers 66
  • Views 19778
  • Members are here 0
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Simulating Verilog-A modules, including VPI, with Spectre

fgarcia


Hello,

I am trying to instantiate a Verilog-A component which includes a VPI call to a C++ library, but I each time I run Spectre simulator I get the following error:

                  Error found by spectre during AHDL read-in.
                      ERROR (VACOMP-2259): "$hello<<--? ;"


The Verilog-A module (including VPI call) is functional and has been verified using NCVerilog and NCSim.
When trying to simulate in Spectre, this module is included with the following sentence:

                   ahdl_include "altered_non_linear_drift.va"

Which is the proper way to include this kind of elements in a standard Spectre netlist?

Thank you in advance

Parents
  • Andrew Beckett

    There is documented support in spectre for "Netlist Compiled Functions" - these are functions you can implement in C/C++ and allow to be called from a spectre netlist. I'm not sure these will quite do what you want - they are for complex calculations of netlist or model parameters - but are not for behavioural modelling (so they can't be called with non-constant expressions, such as node voltages or device currents). You can find out about them using `cds_root spectre`/tools/bin/cdnshelp and searching for "Netlist Compiled Functions".

    There is also the C Model Interface (CMI) which is for developing device models. The documentation for this is not provided out of the box - you need to have access to product 32501 (Virtuoso ® Spectre Model Interface Option). I suspect this would be overkill for your needs - it's really about integrating detailed device models into spectre.

    Apart from that, there's no foreign model interface in spectre.

    Regards,

    Andrew.

Reply
  • Andrew Beckett

    There is documented support in spectre for "Netlist Compiled Functions" - these are functions you can implement in C/C++ and allow to be called from a spectre netlist. I'm not sure these will quite do what you want - they are for complex calculations of netlist or model parameters - but are not for behavioural modelling (so they can't be called with non-constant expressions, such as node voltages or device currents). You can find out about them using `cds_root spectre`/tools/bin/cdnshelp and searching for "Netlist Compiled Functions".

    There is also the C Model Interface (CMI) which is for developing device models. The documentation for this is not provided out of the box - you need to have access to product 32501 (Virtuoso ® Spectre Model Interface Option). I suspect this would be overkill for your needs - it's really about integrating detailed device models into spectre.

    Apart from that, there's no foreign model interface in spectre.

    Regards,

    Andrew.

Children
No Data

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.