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.
Hi,Could anyone help to debug this issue is it a tool issue or code issue.....I'm getting the following error for simulation....the code compiles fine..i have written a separate interface file along with clocking block in it....code for interface file is not shown here.....
ncelab: *F,INTERR: INTERNAL ERROR
TOOL: ncelab 05.82-p002
`timescale 1ns/1nsmodule top;bit Clk24 = 0;bit ResetN = 0;always #12 Clk24 = ~Clk24; gfsktx_top_if tx_gfsk_if(Clk24);
GfskTxTop dut ( .Clk(Clk24), .ResetN(tx_gfsk_if.ResetN), .S2PIn(tx_gfsk_if.S2PIn), .ValidIn(tx_gfsk_if.ValidIn), .TxEnable(tx_gfsk_if.TxEnable), .Gfsk2DacI(tx_gfsk_if.Gfsk2DacI), .Gfsk2DacQ(tx_gfsk_if.Gfsk2DacQ), .ValidOut(tx_gfsk_if.ValidOut) );
//virtual gfsktx_top_if sigs; //function new //function new(virtual gfsktx_top_if sigs); // tx_gfsk_if = sigs; //endfunction: new
//task reset sequence task resetsequence(); //semaphore sem = new(1); //if(!sem.try_get(1)) $stop;
$write("task reset sequence entered\n"); tx_gfsk_if.ResetN <= 1'b0; tx_gfsk_if.S2PIn <= $random; tx_gfsk_if.TxEnable <= $random; tx_gfsk_if.ValidIn <= $random; repeat (2) @top.Clk24; //sem.put(1);
endtask: resetsequence //checking reset task resetcheck();
//semaphore sem_1 = new(1); //if(!sem_1.try_get(1)) $stop; @Clk24; assert(tx_gfsk_if.Gfsk2DacQ == 'b0); assert(tx_gfsk_if.Gfsk2DacI == 'b0); assert(tx_gfsk_if.ValidOut == 1'b0); @Clk24;
task load_data(integer count); int cnt;
cnt = count; //semaphore sem_2 = new(1); //if(!sem_2.try_get(1)) $stop;
tx_gfsk_if.ResetN <= 1'b1; tx_gfsk_if.S2PIn <= $random; tx_gfsk_if.TxEnable <= 1'b1;
while(cnt != 0) begin tx_gfsk_if.ValidIn <= 1'b1; @Clk24; tx_gfsk_if.ValidIn <= 1'b0; repeat(23)@Clk24; cnt--; end
gfsktx_bfm gfsktx;//gfsktx_test gfsktx_test();initial begin gfsktx.resetsequence(); repeat(20) @Clk24; gfsktx.resetcheck(); repeat(20) @Clk24; gfsktx.load_data(20); repeat(300) @Clk24; $finish; end endmodule: top
Hello,I noticed that you are running with the IUS5.82-p002 release so first I suggest you try to get the latest release. I added an empty DUT and a simple interface definition to you test and it ran without an internal error.. Just two assertion errors.So... the problem could be in the interface definition or the DUT. I've attached my simple files. Try running with this on your testcase so we can determine if the problem is with the IUS5.82 release or the other code.interface gfsktx_top_if(input bit clk); logic ResetN, S2PIn, ValidIn, TxEnable, Gfsk2DacI, Gfsk2DacQ, ValidOut;endinterface : gfsktx_top_ifmodule GfskTxTop (input bit Clk, ResetN, S2PIn, ValidIn, TxEnable, Gfsk2DacI, Gfsk2DacQ, output bit ValidOut);endmodule
Hello kameade,Thanks for your help. Its the tool problem. This code runs fine in the next version of the tool(IUS5.83-s001).Cheers
Excellent!Have a great weekend.Kathleen
Can I suggest that, once you have the error figured out, you submit a SourceLink request for this? They are very good about changing "INTERNAL ERROR" messages into helpful messages if you can show them the problem. This means that the next poor bloke who runs into this will get a meaningful error message.Dave F.