[SOLVED] J-Flash - CRC checksum does not compute as instructed

eBrock · Nov 21st 2019, 10:32pm

I'm using J-Flash 6.44e and when I deselect the UICR memory range, nothing changes with the CRC checksum. In fact, the log still says that it is using 3 ranges
when it should be using only 1 range according to the configuration. I've tried saving the project and exiting the program many times. No change. A couple times
it actually changed after closing the program and restarting. But I think this was random luck.

Log with some project info deleted:

Application log started
- J-Flash V6.44e (J-Flash compiled Apr 5 2019 16:16:51)
- JLinkARM.dll V6.44e (DLL compiled Apr 5 2019 16:15:03)
Opening project file [C:\Users\...\nrf52810.jflash] ...
- Project opened successfully
Opening data file [C:\Users\...] ...
- Data file opened successfully (5231 bytes, 3 ranges, CRC of data = 0xE453A72F, CRC of file = 0xDF27C783)
Opening data file [C:\Users\...] ...
- Data file opened successfully (5231 bytes, 3 ranges, CRC of data = 0xE453A72F, CRC of file = 0xDF27C783)

I would appreciate some work-around suggestions. Even a suggestion to a separate program for computing a CRC32 checksum for a firmware image.

SEGGER - Alex · Nov 26th 2019, 9:53am

Hi,

Not sure what you are trying to do.
Disabling a bank in flash does not change the CRC of your data file.
The data file will still hold data for 3 ranges and therefore the same CRC.
If you want to remove a region from the data file, you can go through the
Edit -> Delete range...
menu point. This will modify the ranges available in the data file and therefore also the CRC of the data file.

[SOLVED] J-Flash - CRC checksum does not compute as instructed

[SOLVED] J-Flash - CRC checksum does not compute as instructed

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