topic how does the SP PC pointer gets the stack top and reset handle value at startup_S32K144.S asm file? in S32K

how does the SP PC pointer gets the stack top and reset handle value at startup_S32K144.S asm file?

jackey267 — Tue, 26 Apr 2022 12:32:13 GMT

hi team：

for S32k148 :

1.1 when we have 3 independent firmware(s) at all 3X 512KB Pflash ，how to pick one another Pflash firmware to run instead of run at 0x0000000?

1.2 how does the SP PC pointer gets the stack top and reset handle value at startup_S32K148.S asm file?

danielmartynek — Thu, 28 Apr 2022 12:14:14 GMT

It always starts with the stack pointer and the reset vector at 0x0000 - 0x0004 because VTOR reads 0x0000_0000 by default.

You can refer to AN12218: S32K1xx Bootloader - it shows how to jump to a different firmware.

BR, Daniel