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MMerc.1
MMerc.1
Associate III
March 18, 2022
Question

STM32L433 IAP

  • March 18, 2022
  • 4 replies
  • 1351 views

Hi,

I have 2 partitions on the STM32L433cct6 :

  1. IAP (to upgrade via USB) : 0x08000000 - 0x0800C000
  2. Application : 0x0800C000 - 0x08040000

I have a function to jump to the application :

/* Jump to user application */
JumpAddress = *(__IO uint32_t*) (USBD_DFU_APP_DEFAULT_ADD + 4);
Jump_To_Application = (pFunction) JumpAddress;
/* Initialize user application's Stack Pointer */
__set_MSP(*(__IO uint32_t*) USBD_DFU_APP_DEFAULT_ADD);
Jump_To_Application();

But it doesn't work.

Do you have any ideas ?

Best regards

This topic has been closed for replies.

4 replies

Tesla DeLorean
Tesla DeLorean
Guru
March 18, 2022

Use a debugger, follow​ the transfer of control.

Make sure SCB->VTOR​ gets set to the new address on the otherside.

Be aware of what interrupts are active, and what memory structures are used and there state.

Perhaps avoid reinitializing PLLs and clocks already in functional state.​

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MMerc.1
MMerc.1Author
Associate III
March 18, 2022

Hi,

Thank you for your reply.

I forgot to relocate the vector table... So I uncommented the following line :

#define USER_VECT_TAB_ADDRESS

I have another problem : when I place "Start_Application" function before "HAL_Init", it works fine. But, when I put the "Start_Application" function after "HAL_Init", it doesn't work.

Do you know why ?

Best regards

MMerc.1
MMerc.1Author
Associate III
March 21, 2022

Hi,

Any ideas ?

Mohamed Aymen HZAMI
Mohamed Aymen HZAMI
ST Employee
March 23, 2022

Hello @MMerc.1​,

Make sure to define the right offset of the vector table.

M Aymen

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