Managing Databases

You can open, close, disable, enable, and display information about databases. See the following topics for more information:

• Opening a Database
• Displaying Information about Databases

• Disabling a Database

• Enabling a Database

• Closing a Database

Opening a Database

You can open two types of databases: SHM or VCD. SHM databases support probing both analog and digital signals. VCD databases support probing only digital signals.

When you open a VCD database, the software converts it to SHM format. You can export a database to VCD format.

• If you are using the Tcl command-line interface, type database -open to open either type of database.
  Partial syntax:
  database [-open] dbase_name [-shm | -vcd] [-into file_name ][-default]
See "Database" in the "Using the Tcl Command-Line Interface" chapter, of Cadence Verilog Simulation User Guide for complete syntax and details on the database command.

• If you are using the Cadence^®SimVision environment, choose File - Open Database and fill in the Open Database form.
  See "Managing Simulation Databases" in the SimVision User Guide for information about managing your databases.

You can also open a database from a digital context with the $shm_open system task in your Verilog^®-AMS code. A database opened in this way does not support probing analog signals.

Displaying Information about Databases

• If you are using the Tcl command-line interface, type database -show to display information about databases.
  Syntax:
  database -show [{ dbase_name | pattern } ...]

• If you are using the Cadence SimVision environment, choose Simulation - Show - Databases.

Disabling a Database

• If you are using the command-line interface, type database -disable to disable either type of database temporarily.
  Syntax:
  database -disable { dbase_name | pattern } ...

• If you are using SimVision, do the following:

1. 1. Choose Simulation - Show - Databases.
      
      The simulator:Databases view appears in the Properties window.
      
   2. Remove the mark from the Enabled check box for the database you want to disable.

Enabling a Database

• If you are using the command-line interface, type database -enable to enable a previously disabled database.
  Syntax:
  database -enable { dbase_name | pattern } ...

• If you are using SimVision, do the following:

1. Choose Simulation - Show - Databases.
   
   The simulator:Databases view appears in the Properties window.
   
2. Mark the Enabled check box for the database you want to enable.

Closing a Database

• If you are using the Tcl command-line interface, type database -close to close either type of database.
  Syntax:
  database -close { dbase_name | pattern } ...

• If you are using SimVision, do the following:

1. 1. Choose File - Close Database/Simulation to close a simulation database.
   2. On the Close Database/Simulator form, select the database you want to close.
   3. Click OK.