TM4C crc_table generation and validation

gary schumacher

I am using the TM4C1290CPDT processor and would like to have the linker calculate the CRC of my code (.text, .const, etc.) and put the CRC into the binary image. Once booted, the run-time image will validate this CRC. Currently I am using crc_table in my linker command file and CRCs put into a separate section on the image.

My questions are:

The default algorithm for the crc_table on this processor is TMS570_CRC64_ISO, are they any other choices?

Can I use the on-chip CRC module in the processor to validate this CRCs?

Is there any example code showing this working?

TKS.

over 10 years ago

0 Amit Ashara over 10 years ago

TI__Guru**** 244400 points

Hello Gary,

1. I am not familiar with TMS570_CRC64_ISO so you may have to check the data sheet. But AFAIK the CRC on TM4C129 is a 32bit maximum
2. Yes you can use the TM4C129x CRC module as long as the polynomial matches.
3. You can refer to the example D:\ti\TivaWare_C_Series-2.1.1.71\examples\boards\dk-tm4c129x\crc32

Regards
Amit

0 gary schumacher over 10 years ago in reply to Amit Ashara

Prodigy 225 points

The issue that I see here is that the linker doesn't have a CRC output format that is compatible with the internal CRC generator on the TM4C129.

The TM4C129 can only do a 32bit CRC and the only version option that I see from the linker is TMS570_CRC64_ISO (which I think is the same as CRC-64-ISO).

Please let me know if there are other options from the linker (ti-cgt-arm_5.2.2) and/or any example code to do the CRC-64-ISO in software.

0 Amit Ashara over 10 years ago in reply to gary schumacher

TI__Guru**** 244400 points

Hello Gary,

You can create a CRC32 exe to compute the CRC on the final file and then include it in the post build steps.

Regards
Amit

0 Chester Gillon over 10 years ago in reply to gary schumacher

Guru 92251 points

gary schumacher said:
The issue that I see here is that the linker doesn't have a CRC output format that is compatible with the internal CRC generator on the TM4C129.

The linker does have CRC output formats which are compatible with the TM4C129 CRC generator, the issue is they are missing from the documentation - see Supported CRC algorithms by the TI ARM linker

0 gary schumacher over 10 years ago in reply to Chester Gillon

Prodigy 225 points

Thanks - Just what I was looking for!

0 Amit Ashara over 10 years ago in reply to Chester Gillon

TI__Guru**** 244400 points

Hello Chester,

Thanks, that was an eye opener.

Regards
Amit

Arm-based microcontrollers

Arm-based microcontrollers forum

TM4C crc_table generation and validation