Virtuoso AMS Environment User Guide

Setting Up the AMS Environment

After this change, the information displays like this.

The error pointer now points to the last character in the initial statement, as it should.

Preparing to Use AMS Designer from the Hierarchy Editor

As noted in several places in this document, you can use AMS Designer in various ways according to your needs. One method, especially useful when you are using a design configuration, is to control AMS Designer from the menu of the hierarchy editor. To prepare AMS Designer for this approach,

1.Start the Cadence hierarchy editor.

There are several ways to do this. For example, you can use either of the following methods.

From the CIW, choose File – Open and then select a config view.

Type cdsHierEditor at the UNIX command line.

Virtuoso AMS Environment User Guide

Setting Up the AMS Environment

The Cadence hierarchy editor window appears.

2.If necessary, choose File – Open to select a design configuration. You must have an open design configuration before proceeding to the next step.

3.Choose Plug-Ins – AMS to display the AMS menu in the menu bar.

All the choices in the AMS menu bar except Run Directory are disabled until, in the next step, you select a run directory.

Run directories allow you to tailor the AMS environment for different simulation runs of a design and to track the data associated with each run. Elements of AMS Designer that can vary as you change run directories include:

AMS Designer behaviors having to do with connect rules, analog simulation control files, and SimVision.

Virtuoso AMS Environment User Guide

Setting Up the AMS Environment

The analog simulation control file used for simulation.

The destination directory for error logs.

The directory that holds waveforms.

The cds_globals module associated with the design.

The simulation snapshot that is used.

4.Choose AMS – Run Directory in the hierarchy editor.

The AMS Run Directory form appears.

5. Fill in the Run directory field.

Virtuoso AMS Environment User Guide

Setting Up the AMS Environment

If you want to use an existing run directory, you can choose the directory from the upper Existing run directories cyclic field or click the upperBrowse button to search the hierarchy for the directory you want to use.

If you want to use a new run directory, type the path and name in the Run directory

field.

6.(Optional) Turn on Always use this run directory for this configuration.

Turning on this field tells AMS Designer to use the specified run directory every time you open this configuration in the hierarchy editor and install theAMS menu. In this case, AMS Designer knows which run directory to use and so all the entries in the AMS menu are enabled immediately.

7.(Optional) Copy setup information from an existing run directory to a new run directory.

The fields in theCopy Run Directory Setup pane provide a way for you to copy setup information such as ams.env and amsSC.scs files to a newly created run directory.

a.Select the run directory to serve as the source of setup files. You can do any one of the following:

Type the path and file name into theFrom this run directory field.

Click the lower Browse button and select a path and file name.

Choose an existing run directory from the lower Existing run directories cyclic field.

b.Use the arrow buttons between the Copy and Do not copy lists to specify the files to be copied

8.Click OK.

Virtuoso AMS Environment User Guide

Setting Up the AMS Environment

AMS Designer enables all the choices in the AMS menu.

AMS Menu Choices