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.
The Cadence Academic Network helps build strong relationships between academia and industry, and promotes the proliferation of leading-edge technologies and methodologies at universities renowned for their engineering and design excellence.
Participate in CDNLive
A huge knowledge exchange platform for academia to network with industry. We are looking for academic speakers to talk about their research to the industry attendees at the Academic Track at CDNLive EMEA and Silicon Valley.
Come & Meet Us @ Events
A huge knowledge exchange platform for academia. We are looking for academic speakers to talk about their research to industry attendees.
Americas University Software Program
Join the 250+ qualified Americas member universities who have already incorporated Cadence EDA software into their classrooms and academic research projects.
EMEA University Software Program
In EMEA, Cadence works with EUROPRACTICE to ensure cost-effective availability of our extensive electronic design automation (EDA) tools for non-commercial activities.
Apply Now For Jobs
If you are a recent college graduate or a student looking for internship. Visit our exclusive job search page for interns and recent college graduate jobs.
Cadence is a Great Place to do great work
Learn more about our internship program and visit our careers page to do meaningful work and make a great impact.
Get the most out of your investment in Cadence technologies through a wide range of training offerings.
Overview All Courses Asia Pacific EMEANorth America
Instructor-led training [ILT] are live classes that are offered in our state-of-the-art classrooms at our worldwide training centers, at your site, or as a Virtual classroom.
Online Training is delivered over the web to let you proceed at your own pace, anytime and anywhere.
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.
I would like to make some modifications to my cellview in scratch view mode and stream that out directly from virtual memory. Is there a way for me to do it using SKILL i.e. without using the GUI (File > Export > Stream...)?
Thanks in advance!
I believe that the IC613 version and later can Stream Out from virtual memory, but I don't think this option is available for the IC5141 version.
Hope this helps.
In reply to skillUser:
Yes I'm using IC613, in the XStreamOut GUI there are 2 ways to StrmOut my design: StrmOut From Disk and StrmOut From Virtual Memory.
My first question would be what streamout command, with what switches, do I need to put in the GUI's command textbox when I'm using the StrmOut From Virtual Memory option.
The 2nd question is how can I do the StrmOut From Virtual Memory without using GUI. Is there a way to dump out my scratch cellview and somehow get strmout to pick them up?
In reply to Yaosan:
Can you check for me wheather you have the wrapper in your local bin. Just open a terminal, and type command - which strmin
In IC614, this is easier. Streaming out from virtual memory can be properly done from the GUI without needing to type in a command line, and there's also SKILL support. You can do:
xstSetField("library" "mylib")xstSetField("topCell" "mycell")xstSetField("strmFile" "mycell.gds")xstSetField("virtualMemory" "true")xstOutDoTranslate()
Note the documentation for xstOutDoTranslate leaves a little to be desired - I've pushed for this to be fixed (I requested the ability to do this from SKILL, but it seems the documentation has not been done properly).
In IC613, you need to fill in the field on the form with the same command line arguments you would give to the strmout command from the command line. e.g. "strmout -help". You could enter:
strmout -library mylib -topCell mycell -strmFile mycell.gds
in the field.
There's no public SKILL function in IC613 to do the stream out from memory (you'll need to move to IC614 for that).
In reply to Andrew Beckett:
Hi How, thanks for the reply, but I don't think using wrapper or not is making a difference here.
Thanks for the detailed reply, I already suspected there's no way to do the strmout from virtual memory using SKILL in IC613. It's good to know the feature is coming in IC614, for now I guess my only option is to copy my cellview to a new view, make the changes I need then do the streamout. I could also make changes to my existing cellview and revert the changes after the streamout is done.
Thank you for all the feedbacks!
I could potentially tell you the private SKILL function to do this in IC613, but I don't want to do that because the private function no longer exists in IC614 now that the interface has changed - so it's not really a good idea to tell you, because your code would break as soon as you went to IC614.
Could you move to IC614? It's released now...
I'm not sure when we're moving to IC614 but if it's already released then it probably won't be long before we can start using it.
I have another question that are slightly unrelated. What is the proper way of working in scratch view mode? Should I create a new view in scratch mode and copy over the object one by one before I start doing the modification I need? This seems to be quite troublesome with all the new blockages, vias and other OA objects listed under different property of cellviews.
I tried opening an existing, opened cellview in scratch mode, hoping it will be a new copy i.e. with new dbID that exists only in memory, but somehow it shares the same cellview ID as the original opened cellview. I also tried to use dbCopyCellView() but it won't let me copy to the scratch view unless I specify the overwrite flag, which will write the scratch view to disk, defeating the purpose of having one in the first place.
I'd recommend starting a new thread for a new unrelated question such as this.
In short, scratch mode is handled differently in IC61x than it is in IC51 and earlier releases. In both releases a scratch cellview cannot be saved. If I remember correctly for IC61x, a scratch cellview is obtained by opening a read-only cellview and making it writeable - changes can be made but not saved, essentially what scratch mode means.
There is sure to be a lot more discussion on this, so please start a new thread.
Is the "virtualMemory" key only supported when I call the new xstOutDoTranslate() function introduced in IC614? I would like to use the command line "strmout" function and add this key to my template file if that is possible. That's what I was using before IC614, and I would rather not to switch entirely to the new xsSetField approach to be backward compatible.
If you're running strmout from the command line (I assume you mean the UNIX command line), then this setting is irrelevant because it is being run in a separate process and so will not read Virtuoso's virtual memory. This only makes sense when run from virtuoso itself.
So as such, the key only makes sense in IC614, and even then only when you're doing the streamout within Virtuoso itself.
You're right, thanks for the reply. Now I manage to
stream out my design from the virtual memory, but once the gds is done,
a dialog box will pop up showing how many errors and warnings are found
and prompt user if they want to look at the log file. Is there a way to
prevent this dialog box from showing up?
The reason for this is
that I need to do some post processing once the gds is done but my
script cannot continue until the user interacts with this dialog box by
clicking "Yes" or "No".
Sorry for bumping this post but I would like to know if there's any way to turn off the dialog box that pops up after the streamout is done, which stops the flow of my script. To get around this, I was thinking I could use hiRegTimer() to close this dialog box automatically but I couldn't find the handle (symbol name) for it.
Any idea will be appreciated, I really hope there's a way to get this done otherwise the use of this streamout from memory feature will be very limited.
I don't think this is possible, because it's not a SKILL dialog box. I think an enhancement request to provide a template option (or similar) to control whether the dialog box is displayed or not would be a sensible idea - so you'll need to contact Customer Support to ask for this.