How to change Main stack pointer value

AnwarSheik — Tue, 11 Oct 2022 12:12:32 GMT

Hi,

I recently started working on bootloader for s32k144. I am using s32ds for arm

can some one guide me how to change the MSP value to jump from bootloader to user application

@JozefKozon @jann_ @guoweisun @TomasVaverka @lukaszadrapa

Re: How to change Main stack pointer value

Senlent — Wed, 12 Oct 2022 01:50:02 GMT

Hi@AnwarSheik

you can refer to AN12218 and AN12218SW,

https://www.nxp.com/search?keyword=AN12218&start=0

and below demo code can be found in AN12218SW

/** * Used to jump to the entry point of the user application * The Vector table of the user application must be located at 0x1000 * * */ void JumpToUserApplication( unsigned int userSP, unsigned int userStartup) { /* Check if Entry address is erased and return if erased */ if(userSP == 0xFFFFFFFF){ return; } /* Set up stack pointer */ __asm("msr msp, r0"); __asm("msr psp, r0"); /* Relocate vector table */ S32_SCB->VTOR = (uint32_t)APP_START_ADDRESS; /* Jump to application PC (r1) */ __asm("mov pc, r1"); }

topic How to change Main stack pointer value in S32K

How to change Main stack pointer value

Re: How to change Main stack pointer value