Reset to App

rmaier — Wed, 28 Feb 2024 22:48:57 GMT

Hello,

We are working on implementing a bootloader on the S32K144. The problem we are having is launching the newly bootloaded App.

The bootloader occupies the flash from 0 to 0x1FF. The application starts at 0x2000. When looking at the memory at 0x2000 the bootloaded memory and app memory look the same.

//We have this def #define PROG_START 0x00002000 //When the app is ready to launch, call this JumpToProgram(*((uint32_t *)PROG_START), *((uint32_t *)(PROG_START + 4))); void JumpToProgram(uint32_t userSP, uint32_t userStartup) { /* Set up stack pointer */ DISABLE_INTERRUPTS(); __asm("msr msp, r0"); __asm("msr psp, r0"); ENABLE_INTERRUPTS(); // Set app_start to point to the application's reset handler AppAddr resetHandle = (AppAddr)(userStartup); (resetHandle)(); }

This causes the target to reset and load back into bootloader rather than execute the App. I am using S32DS for ARM. Is there anything I am missing?

Thanks,

Robert

Re: Reset to App

danielmartynek — Mon, 04 Mar 2024 10:14:33 GMT

Hi @rmaier,

Do you mean the vector table at 0x0 and 0x2000 looks the same?

How did you build the application code? Did you modify the linker file?

Have a look at AN12218 S32K1xx Bootloader

Chapter 3. Building compatible applications

https://www.nxp.com/docs/en/application-note/AN12218.pdf

Thank you,

BR, Daniel

topic Re: Reset to App in S32K

Reset to App

Re: Reset to App