S32K148 flash partitioning without deleting data flash

lwaszniowski — Tue, 30 Mar 2021 14:00:37 GMT

Hello all,

I face a problem that data flash (part of FlexNVM) is deleted during flash partitioning command 0x80 (PGMPART). I would like to flash a code to the code flash and also data to the data flash during production flashing via JTAG interface (e.g. J-link from Segger). But when the code is executed first time, it recognize that flash is not partitioned and executes flash partitioning command 0x80 (PGMPART) which erases complete FlexNVM.

Please can somebody suggest an approach to flashing data flash and flash partitioning?
Is there a way to do the flash partitioning during flashing via JTAG (without executing code calling partitioning command PGMPART)? For example by direct flashing value to SIM->FCFG1. I want to keep the production flashing process simple and fast.

I have tried also the opposite approach. I have flashed code doing flash partitioning, started this code and then flashed the data to data flash. It works, but only when I erase only sectors in the range 0x10000000 - 0x1005FFFF. When I erase more, the partitioning is corrupted and must be repeated on the next code execution. It makes sense to me. Sectors from 0x10060000 are probably used for EEE backup (64KB). I would like to ask whether this approach is save.

What else can corrupt the partitioning?

Thanks for any hints,

Libor Waszniowski

Re: S32K148 flash partitioning without deleting data flash

davidtosenovjan — Wed, 31 Mar 2021 15:22:00 GMT

Hi, I would share screenshot from AN11983.

Flash partitioning itself needs to be executed from SRAM. Then you may store data to flash.

S32KのトピックS32K148 flash partitioning without deleting data flash

S32K148 flash partitioning without deleting data flash

Re: S32K148 flash partitioning without deleting data flash