TMS320F280025: HW CRC programming using VCRC

Hi Harsha,

What is the polynomial and size you want to use ? 

Thanks

Aravindhan

Hi Aravindhan,

For now I'm using crc8 and by size do you mean the size of the flash? If yes then its complete flash bank 0 except the top small section where I will store the crc table.

How does the polynomial and size affect the above mentioned steps?

Regards,

Harsha

Harsha,

I do not know how the compiler generates the CRC values. so just wanted to know the details in case I need to check with them. Do you know the steps or want me to check with them ?

Thanks

Arav

Hi Aravindhan,

I just want to confirm if the steps I have mentioned is right for a 28002x controller cause I have tried this on a 28004x controller except I have used vcu0 instead of vcrc and it works, but when I tried the same with 28002x controller using vcrc I got errors which Im discussing in this:

 https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/1030624/tms320f280025c-flashapi-fpu32_rom_eabi-symbols-library-combines-incompatible-files-of-vcrc-library/3814046#3814046

I just want to make sure here that the error is because of incompatibility and not because I made a mistake in steps to be followed.

Regards,

Harsha

Harsha,

Let me check and see if these steps are correct. 

Thanks

Aravindhan

looks like the error is due to incompatibility.

We will take a note to update the lib in next release of C2000ware. 

Is this blocking you currently  ? if not you can wait for the release.

Hi Baskaran,

Thanks for the reply. Right now Im using vcu2 as the vcu support and Im using the vcu2 libraries and this is not throwing any error and I dint face any runtime errors I'm just getting the below 2 warnings. But so far I have not seen any blockages, but I'm not 100% sure if I will face any issue going forward because of these warnings.

Description Resource Path Location Type
#10373-D library "../VCU/c28x_vcu2_library_fpu32.lib" contains TI-COFF object files which are incompatible with the ELF output file. Ensure you are using the proper library. Bootloader_TI_Master_f28002x C/C++ Problem
#10373-D library "../VCU/c28x_vcu2_library.lib" contains TI-COFF object files which are incompatible with the ELF output file. Ensure you are using the proper library. Bootloader_TI_Master_f28002x C/C++ Problem

Regards,

Harsha 

Harsha,

For F28002x you have to use the VCRC library incase you want to do CRC computation at run-time since VCU2 is not supported on F28002x. Do you intend to run at run-time any CRC computation using the processor crc unit ?

Thanks

Aravindhan

Harsha,

Oh. okay, if you are going to be just including the header files and not use the VCRC engine then it should be fine. However, I think you should use vcu option as vcrc while compiling and not vcu2, because if in future you add any vcu library and try to run on the F28002x it will not work. Just a caution. 

Thanks

Aravindhan

Thanks Aravindhan,

I have left the vcu support option as empty as selecting vcrc throws those compatibility errors also Im not including any vcu libraries cause now Im not using it, but hopefully I get to use the vcu engine in my next project.

Regards,

Harsha

Hi Harsha,

sounds good. Can we close this thread or is there anything further you need help ?

Thanks

Aravindhan

Thanks