About Memory view windows

jaylou — Sat, 18 Sep 2021 05:18:56 GMT

I am learning Flash by demo flash_partitioning_s32k148, but why do my memory view windows keep showing question marks no matter which memory region I chose?

Re: About Memory view windows

lukaszadrapa — Mon, 20 Sep 2021 10:32:26 GMT

Hi,

If a debugger shows somehting like ‚??‘ or ‚XX‘, it means that the memory access was terminated by bus error. In case of flash memory, it is a result of double bit ECC error.
Generally, there are three common reasons for ECC error:
- erase or program operation is terminated by unexpected reset, so the flash is left in undetermined state
- due to over-programming when we program double word which is not fully erased
- due to flash wear-out when too many erase-program cycles have been performed or when data retention period was exceeded
If you can see the question marks everywhere, it’s caused by interrupted erase operation, most likely. The solution is to erase the flash again.

Regards,
Lukas

topic About Memory view windows in S32K

About Memory view windows

Re: About Memory view windows