Compiler/TMS320F28335: using the same compiler but have different result

Strong ZHANG

Part Number: TMS320F28335

Tool/software: TI C/C++ Compiler

Customer report a very strange problem, they use CCS5.4 and the complier 6.14, build a Sub-project and create a lib file, and add the lib file to their main project and do the test. It seems that the lib file created today is different from that created one month ago, while the source code, the configuration of complier and CCS are all the same.

Below figure are the AD sample value got from CCS graph when using the lib file created one month ago, the input AD voltage is triangle waveform, and we can see it has big distortion.

The second one is correct waveform with the same voltage input when using the lib file created today.

Customer claim that everything is the same except the build time, so will it have this case that by using the same complier it will have different output file even the source code and the configuration is the same?

over 8 years ago

0 Keith Barkley over 8 years ago

Guru 42215 points

This really looks like a hardware problem, or a variation in interrupt timing. Can you toggle a pin during the A/D conversion to ensure that the sample times are the same?

0 George Mock over 8 years ago

TI__Guru**** 251230 points

Strong ZHANG said:
Customer claim that everything is the same except the build time

Consider doing a comparison with the objdiff utility from the cg_xml package. It can compare object files, libraries, and executables. Meta-data like build time is ignored by default.

Thanks and regards,

-George

0 Strong ZHANG over 8 years ago in reply to Keith Barkley

TI__Expert 4500 points

Hi Keith,

Thanks for your reply, it is not a hardware problem, it can work well if they use the lib file bulit last week.

0 Strong ZHANG over 8 years ago in reply to George Mock

TI__Expert 4500 points

Hi George,

I alrady download the cg_xml package, but I don't know how to use it.

Which stable version of complier we can propose the customer to use for 28335?

Strong ZHANG

0 George Mock over 8 years ago in reply to Strong ZHANG

TI__Guru**** 251230 points

Strong ZHANG said:
I alrady download the cg_xml package, but I don't know how to use it.

Once the package is installed, use your favorite web browser to view the file index.htm in the root directory. That is documentation for all the scripts in the package, including objdiff.

Strong ZHANG said:
Which stable version of complier we can propose the customer to use for 28335?

That depends on your circumstances. Guidance in this matter is in the article Compiler Version Numbers and What They Mean.

Thanks and regards,

-George

Code Composer Studio™︎

Code Composer Studio forum

Compiler/TMS320F28335: using the same compiler but have different result