STM32L151 custom bootloader problem with HAL_UART_ErrorCallback

[Alexor]

Hi all! I use STM32L151VDT7X, CubeMX HAL and Atollic TrueSTUDIO® for STM32 9.3.0 in my project. I need to upgrade my firmware on-the-air and so I made “bootloader + image�? application:

1)     Edited in bootloader linker file:

MEMORY
{
RAM (xrw)     : ORIGIN = 0x20000000, LENGTH = 80K
FLASH (rx)     : ORIGIN = 0x8000000, LENGTH = 0xA100
FLASH2 (rx)     : ORIGIN = 0x8040000, LENGTH = 0
}

2)     Edited in image linker file:

MEMORY
{
RAM (xrw)     : ORIGIN = 0x20000000, LENGTH = 80K
FLASH (rx)     : ORIGIN = 0x800A100, LENGTH = 192K - 0xA100
FLASH2 (rx)     : ORIGIN = 0x8040000, LENGTH = 192K
}

3)     Created simple test bootloader:

void JumpToApplication(uint32_t VT_Address) {
              __disable_irq();
              HAL_RCC_DeInit();
              HAL_DeInit();
              void (*Int_Entry) (void);
              uint32_t sp = *(uint32_t *)(VT_Address + STACK_POINTER); // STACK_POINTER == 0
              __set_MSP(sp);
	// INT_PROGRAM_START == 4
              Int_Entry = (void(*)())(*(uint32_t *)(VT_Address + INT_PROGRAM_START)); 
              (*Int_Entry)();
}
 
 
int main(void)
{
 /* USER CODE BEGIN 1 */
              JumpToApplication(IMAGE_VECTOR_TABLE); //IMAGE_VECTOR_TABLE == 0x0800A100
              return 0;

4)     In image program the first action:

void RemapVectorTable(uint32_t VT_Address) {
              __disable_irq();
              SCB->VTOR = VT_Address;
              __enable_irq();
}
 
 
int main(void)
{
//IMAGE_VECTOR_TABLE == 0x0800A100        
RemapVectorTable(IMAGE_VECTOR_TABLE);
..
HAL_Init();

 Program without bootloader works fine (started from 0x8000000 address). The result “bootloader + image�? program starts, works, but falls into HardFault_Handler at the point HAL_UART_ErrorCallback. I use DMA UART4. Program without bootloader passes HAL_UART_ErrorCallback and continues to work.

What’s wrong with HAL_UART_ErrorCallback or with the bootloader?

[Tesla DeLorean · Accepted solution]

Double check VTOR implementation, if it needs to be 512 byte boundary to accommodate size of table.

[Alexor]

Thanks for the quick response! Could you tell me how can I check it? In map file? Do I need to edit ".isr_vector" section in the linker script?

[Alexor]

Thanks!!! It works. I didn't know this limitation:

"There are also limitations on the offset address value, which must be aligned to multiples of 512 bytes."