How to become a senior digital IC Design Engineer (6-7) digital IC Verification: debug skills

One 、DEBUG Ideas

         Before simulation , The simulator needs to understand Simulation Pattern Main test contents of 、 Test method and control process , These contents exist in PatternList in ;

         In the design Pattern When , Can increase Pattern Goto Printing of , It is very necessary , On the one hand, it can help the simulator locate the current Pattern Operating condition , On the other hand, it can also prove that the software program is executed as scheduled .

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Two 、FAIL  situation

        1、 One is to show Finish, however mem_compare Failed： such CASE Need to view mem_compare.txt file , There will be a prompt indicating which segment of address data comparison is wrong , Then you need to confirm the type of error , For example, it is only a few bytes wrong or a large segment wrong , Or it's all wrong , According to the law of mistakes , Inverse inference CPU perhaps Master act , What kind of unreasonable configuration may lead to such errors , Then find out where the error started from the intermediate nodes , So as to locate the cause ;

        2、 One is direct Failed： such CASE yes Pattern There are some status or data judgments , It's not as expected , So I printed it directly Pattern Gogo Make the simulation fail directly , In this case, you can directly trace the printing error to the point of difference , So as to locate the cause ;

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