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Re: Trying to jump in stm32l496 bootloader from application

Erwan Gouriou
 

Hi Philippe,

There could be multiple reasons, but we'd need reported errors to be able to help.
Also, maybe you can open a github discussion and provide details (errors, build  environment, ...)
for following up.

BR
Erwan



On Thu, 10 Jun 2021 at 22:24, Philippe O'Reilly <poreilly@...> wrote:

Hi,

 

I wrote a small application for the STM32L496 processor. The application simply jumps in the ROM bootloader of the CPU.

When I compile my application within STM32Cube IDE (version 1.6.0), it works properly.

When I compile it with zephyr, using west metatool, it does not work.

 

Here is the code of my application:

 

    void (*SysMemBootJump)(void);

    volatile uint32_t addr = 0x1FFF0000;

    HAL_RCC_DeInit();

    SysTick->CTRL = 0;

    SysTick->LOAD = 0;

    SysTick->VAL = 0;

    __HAL_RCC_SYSCFG_CLK_ENABLE();

 

    __disable_irq();

    SCB->VTOR=0;

 

    __HAL_SYSCFG_REMAPMEMORY_SYSTEMFLASH();

 

    SysMemBootJump = (void (*)(void)) (*((uint32_t *)(addr + 4)));

    __set_MSP(*(uint32_t *)addr);

 

    SysMemBootJump();

       while(1);

 

 

I can not find out what makes it fail on Zephyr. If I could get some help on that problem, I would really appreciate.

 

Thanks

Philippe O’Reilly

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