If we want upgrademyself bootloader ，Have additional S32K344 BootRom?

[Garey]

If there is a reserved BootLoader FLASH, where is it?
If not, is there any way to modify the BootLoader of the S32K344?

[lukaszadrapa · Accepted solution]

Hi,

Sorry for delayed response, we are overloaded due to summer vacations.

Let me share what we have:

There’s a support in HSE firmware. You can download HSE FW and HSE demo app, HSE OTADEMO for A/B Swap from S32K3 Standard Software and S32K3 Reference Software packages:

https://www.nxp.com/webapp/swlicensing/sso/downloadSoftware.sp?catid=SW32K3-STDSW-D

https://www.nxp.com/webapp/swlicensing/sso/downloadSoftware.sp?catid=SW32K3-REFSW-D

OTADEMO for A/B Swap uses this memory layout:

int_flash               : ORIGIN = 0x00400000, LENGTH = 0x00100000    /* 1024K */

int_flash_app           : ORIGIN = 0x00500000, LENGTH = 0x000D4000    /* 1024K - 176K (sBAF + HSE). Used for the application binary to flash (OTA) */

int_flash_Passive       : ORIGIN = 0x00600000, LENGTH = 0x001D4000    /* 2048K - 176K (sBAF + HSE) */

Then we provide Unified bootloader which can be downloaded here (no HSE is used):

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

This one uses this area for bootloader:

int_flash               : ORIGIN = 0x00400000, LENGTH = 0x00040000       /* 256K*/

And this for an application:

int_flash               : ORIGIN = 0x00440200, LENGTH = 0x007FFFFF - 0x00040200

If you have own bootloader, you can follow layout of Unified bootloader to use first possible location of IVT at 0x00400000.

Regards,

Lukas

[Garey]

This is a question that confused me, hope this question could be responded to ASAP.