RT1062 bootloader jump to App,not working properly

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RT1062 bootloader jump to App,not working properly

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shengbing
Contributor I

Hi! Please Look at this problem for me.

In the bootloader,the code is:

uint32_t *appVectorTable = (uint32_t *)APPLICATION_ADDRESS;
applicationAddress = appVectorTable[kInitialPC];
stackPointer = appVectorTable[kInitialSP];

jump_to_application(applicationAddress,stackPointer);

void jump_to_application(uint32_t applicationAddress, uint32_t stackPointer)
{
#if BL_FEATURE_OTFAD_MODULE
quadspi_cache_clear();
oftfad_resume_as_needed();
#endif

shutdown_cleanup(kShutdownType_Shutdown);

// Create the function call to the user application.
// Static variables are needed since changed the stack pointer out from under the compiler
// we need to ensure the values we are using are not stored on the previous stack
static uint32_t s_stackPointer = 0;
s_stackPointer = stackPointer;
static void (*farewellBootloader)(void) = 0;
farewellBootloader = (void (*)(void))applicationAddress;

// Set the VTOR to the application vector table address.
SCB->VTOR = (uint32_t)APP_VECTOR_TABLE;

// Set stack pointers to the application stack pointer.
__set_MSP(s_stackPointer);
__set_PSP(s_stackPointer);

// Jump to the application.
farewellBootloader();
// Dummy fcuntion call, should never go to this fcuntion call
shutdown_cleanup(kShutdownType_Shutdown);
}

This file named MIMXRT1062xxxxx_flexspi_nor.scf is in the App.

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jingpan
NXP TechSupport
NXP TechSupport

Hi @shengbing ,

It seems no problem in these code. Is the bootloader work in RAM and jump to flash base app? Is the PC and stack address read back correct?

 

Regards,

Jing 

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shengbing
Contributor I

Hi,@Jing,

The bootloader is working in external flash.The PC and stack address are 0x60040415 and 0x20020000, respectively, by reading back.

微信图片_20230710162125.png

Please see the file named <MIMXRT1062xxxxx_flexspi_nor.scf>  for the relevant configuration.

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jingpan
NXP TechSupport
NXP TechSupport

Hi @shengbing ,

I tested your bootloader. At first it can't work too. Then I set the compile optimization option to -O1. It can work. After that, Then I exchange the __set_MSP() and __set_PSP() position and return back to -O0, it can work too.

__ISB() and __DSB() is useless to this case. So I think this is compiler problem but I don't know why.

 

Regards,

Jing

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