Compiler/TMS320F28035: Issue with C++ compiler

S.Ibarra

Tool/software: TI C/C++ Compiler

Hi, All

I need to pruduce a sinusioidal signal. Then, I did generate a table with values that i will load in the CMPA register of the ePWM module. The load will be each 33us with control of the interrupt subrutine of ePWM. I did define the Table in the main.c file and the data of this table were loaded in flash memory. The build of my programm runs fine, but when, in the routine of service the interruption, I include the following code line " EPwm4Regs.CMPA.half.CMPA=SinTable[j] " the build process generate the follow error message " identifier "SinTable" is undefined".

Thanks in advance

Sebastián

over 8 years ago

0 Christopher Chiarella over 8 years ago

TI__Mastermind 30255 points

Hello

Are you including all the headers you need? Have you defined SinTable in the appropriate scope?
Are you using C++? I'm less familiar with that and may be beneficial to check out a C++ guide to make sure you are setting it up how it should be.

Best regards
Chris

0 S.Ibarra over 8 years ago in reply to Christopher Chiarella

Intellectual 655 points

Hi Christopher

I did define the table in the main.c file and in file.cmd I did define the flash memory section where I did put the data of the table. I am using the like a framework an example of the a workshop. Do you belive that it's necessary try to programm in assembly language?

Thankyou very much

Sebastián

0 Christopher Chiarella over 8 years ago in reply to S.Ibarra

TI__Mastermind 30255 points

Hello

No, it's not necessary to use assembly. Are you not seeing the table populated into flash? Make sure it is defined as "const".
Providing some code snip-its would help.

Best regards
Chris

0 S.Ibarra over 8 years ago in reply to Christopher Chiarella

Intellectual 655 points

Hello Christopher
I can see the values that I did calculate in the flash memory. I send 3 screenshot of my programm.

Thankyou very much for your help.

Sebastián

0 S.Ibarra over 8 years ago in reply to Christopher Chiarella

Intellectual 655 points

Hello Christopher
I can see the values that I did calculate in the flash memory. I send 3 screenshot of my programm.

Thankyou very much for your help.

Sebastián

0 Christopher Chiarella over 8 years ago in reply to S.Ibarra

TI__Mastermind 30255 points

Hello

Since SinTable is declared in a different source file than it is being used, in the source file of the ISR you need to the "extern" it at the top of the file.

Ex: extern const unsigned long SinTable[];

Additionally, you need a "*" between i and j for multiplication.

Best regards

Chris

0 S.Ibarra over 8 years ago in reply to Christopher Chiarella

Intellectual 655 points

Hello Chris
I can build my programm without error. Thanks a lot. Sebastián

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Compiler/TMS320F28035: Issue with C++ compiler