TMS570LS3137: CRC issue

BarematalProgrammer

Linker Command file crc_table(_my_crc_table, algorithm=TMS570_CRC64_ISO) It should match to TMS570LS3137 CRC Pheripheral calculated Value:

STEP 1) APPLICATION while compiling in CCS it should generate CRC64_ISO for APPLICATION Memory REGION .

This can be achieved using crc_table(_my_crc_table, algorithm=TMS570_CRC64_ISO) . But it is not matching to POLYNOMIAL 64 CRC what I Calculated in step 2 .

STEP 2)

I have to Verify APPLICATION is GOOD prior to passing control to App from Boot , so with help of following thread I implemented 2 methods(in the boot) to calculate 64 poly CRC of the Application Region .

https://e2e.ti.com/support/microcontrollers/hercules/f/312/p/755466/2805284#2805284

STEP 3)

Boot loader never pass control to APP if the CRC does not match with LINKER Generated CRC !

over 7 years ago

0 QJ Wang over 7 years ago

TI__Guru**** 199286 points

Hello Chandre,

From the screenshot, the CRC calculated using the linker command file is the CRC value of flash region of bootloader. The ResultCrcSW_u64 and ResultCrcHW_u64 are for the application.

0 BarematalProgrammer over 7 years ago in reply to QJ Wang

Expert 1715 points

Sorry that I did not provide the information clearly ,

ALL 3 Methods of CRC CALCULATIONS 1) Hardware CRC Calculation 2) Software CRC Calculation 3) Linker CRC Calculation

ARE FOR THE SAME MEMORY REGION (FLASH) NOT FOR DIFFERENT MEMORY (FLASH) REGIONS . Attached screen shot

0 BarematalProgrammer over 7 years ago in reply to QJ Wang

Expert 1715 points

providing complete Details , I have changed the code to calculate CRC of the specified region by all 3 ( ResultCrcSW_u64 ( poly 64 ) , ResultCrcHW_u64 ( poly 64 ) AND linker command file is the CRC value ( poly 64 ) )

0 QJ Wang over 6 years ago in reply to BarematalProgrammer

TI__Guru**** 199286 points

Hello Chandre,

I noticed you open another thread for this topic. I will close this one.

Arm-based microcontrollers

Arm-based microcontrollers forum

TMS570LS3137: CRC issue