S12 / MagniV MicrocontrollersのトピックRe: Qestion about s12z bootloader

Qestion about s12z bootloader

Gildarai — Fri, 14 Feb 2025 08:10:49 GMT

I make bootloader with 128kbytes s12z.

I can see 'go to app(0xFE0200)' function is performed, but application does not worked.

It seems like software reset due to watchdog.

I attached my configuration of prm and map file.

Please give me your suggestion.

<<startup section at map file>>

<<prm file for Application>>

<<prm file for Bootloader>>

Re: Qestion about s12z bootloader

kef2 — Fri, 14 Feb 2025 10:17:15 GMT

There could be various reasons. Just debug it. If you didn't know, you may temporarily/permanently add bootloader code to your app binary with this line in your app prm file:

HEXFILE bootloader.s19

If your bootloader project doesn't produce s19, please look in, eh, IIRC, linker settings in your bootloader project. Sorry, don't have exact instructions, s12z got totally eliminated from our projects since lack of stock during pandemia...

With common app+boot project you could set BP at app entry and debug from start of app.

Re: Qestion about s12z bootloader

lama — Mon, 17 Feb 2025 10:59:26 GMT

Hi,

There is some info mentioned at community, however no guarantee no support but I believe it could help you if you compare it with your SW.

Because, the issue can be anywhere I would like to suggest you, as I already mentioned, to compare solutions.

I believe it will help you.

https://community.nxp.com/t5/S12-MagniV-Microcontrollers/Simple-Serial-Bootloader-for-S12Z-AN-draft/ta-p/1126452

I found also this one but I found it just now.

https://community.nxp.com/t5/S32K-Knowledge-Base/Unified-bootloader-Demo/ta-p/1423099

Best regards,

Ladislav