TMS320F280049: VCU CRC32 calculation

Michael Fainshtein

Part Number: TMS320F280049

Hi,

My goal is to calculate the standard CRC32 (poly = 0x4C11DB7, init = 0xFFFFFFFF, reflect in, reflect out, xorOut 0xFFFFFFFF).

I managed to do this with VCRC on F28388. Now I need to do the same with VCU1 (0) on F280049.

While in the VCU-2 library there was a possibility to choose the "input bits reflected" option, I see no way to do the same in this case.

Is there any way to solve this? Or maybe I missed something?

over 4 years ago

0 Sira Rao80 over 4 years ago

TI__Mastermind 26895 points

Hi, the expert on this topic is on vacation for a couple of days. We appreciate your patience - you should receive a reply early next week.

Thanks,

Sira

0 Shanty over 4 years ago

TI__Expert 5410 points

Hi,

The bit reflected option is only supported on VCU2.

-Shantanu

0 Michael Fainshtein over 4 years ago

Prodigy 60 points

Thanks for your answers,

As far as I understand, the "getCRC32_vcu" function for VCU0 is written in assembly and includes VCRC32L_1 and VCRC32H_1 instructions.

I guess that all that need is to change the bits order (flip) and to swap the octets before using these functions. Maybe there is a ready implementation of such "reflected" function? I think it would be useful to include such function to the library.

Michael.