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 have the following issue: I am trying to run an ocean script (diffopamp.ocn) inside an interactive session in a linux shell.
The ocean script diffopamp.ocn have the lines:
And the script skillafv.il has the procedure:
procedure(AFVtestInit(file "t")let((ps line key (fp infile(file)) (count 0))AnalogTests = ’unboundAnalogTests = makeTable(’AnalogTests nil)if(fp thenwhile((line=lineread(fp))println(line)count++;;AnalogTests is equivilent to a record which is indexed on a key;; that contains a value and two other fields, pass and fail;; value@keyslot pass failps = linewhen(length(ps) < 3printf("Field formats are:\n testkey m value\n testkey x value\ntestkey r lowerLimit upperLimit\n")printf("Where testkey is the name of the test.\n character m meansminimum value\n character x means maximum value\n character r means range of2 values\n")error("Test specification requires THREE or more fields; line %d\ncontains %s\n"count line))key = get_pname(car(ps))AnalogTests[key] = tconc(AnalogTests[key] get_pname(cadr(ps)))AnalogTests[key] = lconc(AnalogTests[key] cddr(ps))AnalogTests[key] = lconc(AnalogTests[key] list(0))AnalogTests[key] = lconc(AnalogTests[key] list(0))AnalogTests[key] = lconc(AnalogTests[key] list(0));;this gets the tconc formatted list and stuffs it in the tableAnalogTests[key] = car(AnalogTests[key]))elseerror("Cannot OPEN file %s \n" file))))
When I load the ocean script inside the CIW session using: load("diffopamp.ocn") there are no issues, and I can execute the procedure inside the skill script. But when I tried to use an interactive session called in a unix shell, and after typing:
I got the error:
*Error* eval: unbound variable - AnalogTests
Can somebody please help me?
I finished finding the issue. I had copied the original script from a pdf tutorial and for some reason the line:
AnalogTests = makeTable('AnalogTests nil) was having some issue. Not sure what, but after typing the lines manually on the batch mode I found that the line has an issue. I basically edited the original script typing again the line and voila!! Now it is working.
In reply to angelmariag:
I suspect there was some strange control character on the line. Doing "cat -vet file.il" would show anything abnormal.
By the way, there's no need for the line:
AnalogTests = ’unbound
before the assignment - it is completely superflous.
In reply to Andrew Beckett:
Thanks a lot Andrew !!!
I copied again the original text from the pdf and after typing the command that you suggested:
"cat -vet sillafv.il"
This was the output:
procedure(AFVtestInit(file "t")$let((ps line key (fp infile(file)) (count 0))$AnalogTests = M-bM-^@M-^Yunbound$AnalogTests = makeTable(M-bM-^@M-^YAnalogTests nil)$if(fp then$while((line=lineread(fp))$println(line)$count++$;;AnalogTests is equivilent to a record which is indexed on a key$;; that contains a value and two other fields, pass and fail$;; value@keyslot pass fail$ps = line$when(length(ps) < 3$printf("Field formats are:\n testkey m value\n testkey x value\n$testkey r lowerLimit upperLimit\n")$printf("Where testkey is the name of the test.\n character m means$minimum value\n character x means maximum value\n character r means range of$2 values\n")$error("Test specification requires THREE or more fields; line %d\n$contains %s\n"$count line)$)$key = get_pname(car(ps))$AnalogTests[key] = tconc(AnalogTests[key] get_pname(cadr(ps)))$AnalogTests[key] = lconc(AnalogTests[key] cddr(ps))$AnalogTests[key] = lconc(AnalogTests[key] list(0))$AnalogTests[key] = lconc(AnalogTests[key] list(0))$AnalogTests[key] = lconc(AnalogTests[key] list(0))$;;this gets the tconc formatted list and stuffs it in the table$AnalogTests[key] = car(AnalogTests[key])$)$else$error("Cannot OPEN file %s \n" file)$)$)$)$
And yes, even when I was not seeing the strange control characters on the file, there were there and with the command now I can see that they are there (curiously inside the CIW, there was no issue):
AnalogTests = M-bM-^@M-^Yunbound$
AnalogTests = makeTable(M-bM-^@M-^YAnalogTests nil)$
Thanks a lot again, and I am going to follow your suggestion about the superflous line.
I see that you are an active member in many forums and i hope you can help me to solve my issue.
I have developed a script containing the following procedures ( i created a Matrice with i lines and j columns using Tables )
procedure( Storage_Results(i lifetime Unit_lifetime VT deltaVT gm_max vargm id0_sat varid0 Id1_lin varId1)
V = vector(sprintf(lifetime "%f" lifetime) Unit_lifetime desVar("Vdd") desVar("Vg") sprintf(VT "%f" VT) sprintf(deltaVT "%f" deltaVT) sprintf(gm_max "%f" gm_max) sprintf(vargm "%f" vargm) sprintf(id0_sat "%f" id0_sat) sprintf(varid0 "%f" varid0) sprintf(Id1_lin "%f" Id1_lin) sprintf(varId1 "%f" varId1))
myTable[i] = makeTable("table" 0)
for(j 0 length(V)-1
setarray(myTable[i] j V[j]))
); end procedure
for( j 0 length(myTable[i])-1
fprintf( myport " %s " myTable[i][j]))
fprintf( myport "\n")
); end procedure
And i have the same problem of angelmaria. when i loaded my script, i got this error "*Error* eval: unbound variable - myTable" Knowing that at first it works many times then it does not without changing any thing in my script.
so i tapped again the line (myTable[i] = makeTable("table" 0)) as angelmaria did. But this trick works sometimes not often.
i also did (cat -vet myscript_09.il) to show anything abnormal. and i removed all the strange control characters. but this didn't resolve my problem.
So, can you tell me what can i do please.
thank you alot in advance.
In reply to insaf:
The forum guidelines ask you not to append on the end of old threads, and this isn't really related to the previous post. It's unlikely to be anything to do with strange characters in your code.
My assumption is that you've never defined myTable anywhere. Inside Storage_Results, it's doing myTable[i]=... and so this is trying to store a new table into the index "i" of myTable. Somewhere you'll need to initialize myTable by doing (for example):
ok thank you for your information. I'm a new member here and i don't know the forum guidelines.
thank you very much again for your usuful response. it seems to be working.
I don't understand yet why it's working sometimes without initialized myTable. However, that's not important anyway.
If you look at the list of posts in each forum (at least in the custom IC, RF and mixed signal forums) you'll see that the topmost post covers the guidelines.
As for how this can work sometimes and not others, it can only be because the variable is being initialised somewhere. Given that the variable is a global variable, maybe it is in somebody else's code and you're dependent upon whether that other code has been run. The dangers of global variables...
thanks a lot Andrew for this explanation :)