topic 回复： s32k312 init sram ecc from jlink? in S32K

s32k312 init sram ecc from jlink?

victory — Tue, 12 Nov 2024 03:12:59 GMT

Hi Nxp,

i'm working on a ramcode application using jlink. currently i found a problem on in virgin chip. after jlink connect to chip, sram in some area is '----' unaccessible, it probably a ecc sram not initialized, and i cant write ramcode to sram.

so my question is how to init these sram on jlink at begining, is there a mininum reference code, or which code is MUST do in startup_cm7.s before lable "RamInit" , thanks.

回复： s32k312 init sram ecc from jlink?

victory — Tue, 12 Nov 2024 05:09:38 GMT

append:

i've found segger wiki https://wiki.segger.com/NXP_S32K3xx#ECC_RAM, is it possible for me to use jlink initial the reset region of sram, currently i just use jlink write memory api(32bit /64bit) will fail to write.

Re: s32k312 init sram ecc from jlink?

petervlna — Tue, 12 Nov 2024 08:52:34 GMT

Hello,

I am not familiar with Jlink, but seems that user can execute debugger scripts.

https://wiki.segger.com/J-Link_script_files

I know that Lauterbach offers possibilities to fully control RAM init in statup scripts.

This is rather question for Segger then NXP.

Best regards,

Peter

Re: s32k312 init sram ecc from jlink?

victory — Tue, 12 Nov 2024 10:23:52 GMT

i found s32ds have a jlinkscript to use eDMA to init ecc ram, copy it and works.