Cadence® system design and verification solutions, integrated under our System Development Suite, provide the simulation, acceleration, emulation, and management capabilities.
System Development Suite Related Products A-Z
Cadence® digital design and signoff solutions provide a fast path to design closure and better predictability, helping you meet your power, performance, and area (PPA) targets.
Full-Flow Digital Solution Related Products A-Z
Cadence® custom, analog, and RF design solutions can help you save time by automating many routine tasks, from block-level and mixed-signal simulation to routing and library characterization.
Overview Related Products A-Z
Driving efficiency and accuracy in advanced packaging, system planning, and multi-fabric interoperability, Cadence® package implementation products deliver the automation and accuracy.
Cadence® PCB design solutions enable shorter, more predictable design cycles with greater integration of component design and system-level simulation for a constraint-driven flow.
An open IP platform for you to customize your app-driven SoC design.
Comprehensive solutions and methodologies.
Helping you meet your broader business goals.
A global customer support infrastructure with around-the-clock help.
24/7 Support - Cadence Online Support
Locate the latest software updates, service request, technical documentation, solutions and more in your personalized environment.
Cadence offers various software services for download. This page describes our offerings, including the Allegro FREE Physical Viewer.
Get the most out of your investment in Cadence technologies through a wide range of training offerings.
This course combines our Allegro PCB Editor Basic Techniques, followed by Allegro PCB Editor Intermediate Techniques.
Virtuoso Analog Design Environment Verifier 16.7
Learn learn to perform requirements-driven analog verification using the Virtuoso ADE Verifier tool.
Exchange ideas, news, technical information, and best practices.
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.
It's not all about the technlogy. Here we exchange ideas on the Cadence Academic Network and other subjects of general interest.
Cadence is a leading provider of system design tools, software, IP, and services.
Get email delivery of the Cadence blog featured here
Prior to the SPB16.5 release, multiple designers can edit and update the same Allegro PCB Designer design without conflict notification. To prevent this situation an advisory lock feature is now available in 16.5.
Read on for more details…
When opening a design for editing, Allegro PCB Designer will generate a lock file (<design>.lck). This lock file is maintained until Allegro PCB Designer exits, opens another design or writes a new design file. If a different program attempts to open this design, a warning message is presented which allows you to override or cancel your design open request:
A similar message is presented if you attempt to overwrite a locked design:
Typically as you edit a design, you may save the design to a new name. When this occurs the lock will be removed from the original design and created on the newly saved design.For new designs (File> New), a lock file will not be created until the first time the database is written.Advisory locking is NOT supported in the free viewers. Since the viewer plus program can write a database, it supports locking.
NetrevNetrev can be initiated by the Front-End tools to update a design. It supports locking for both the input and output designs. If either design is locked, netrev will fail with an error in netrev.lst.OptionsLocking supports the variable allegro_nolocking. When this variable is set, programs will NOT create lock files, but will check for the presence of lock files before opening a design.Per Project Journal FileCurrently a program journal file (e.g. allegro.jrl) is opened in the starting directory of the program. This starting directory is typically the last directory from the last run of the program. On Windows, it is hard to track down the journal file location should the program fail.
The 16.5 release now creates a new journal file in the project directory of a design under edit. If you switch to a different design directory by opening a design in that directory, the current journal file will be closed and new journal initiated in the new project directory. The end result of this change is to associate the journal file with the project directory.
This new behavior is disabled under the following conditions: • You have specified a journal file when starting the program. • You have issued a journal command to start a new journal. The sub-directory journal option (ADS_SDLOG) and the environment variables to modify the journal file naming are supported with the per project journal change.
As always, I look forward to your feedback on using this new 16.5 feature.
Jerry "GenPart" Grzenia
Well, regardless of auto backup enabled, since the PCB .brd file is open (being edited at the time), a lock file is in place.
for 16.5, when auto backup is activated, will the auto lock also happen each time the file is saved?