HardFault exception problem

[mcho.19]

I make boot loader for jump to 0x08020000

And, I make program that start from 0x08020000, also same vector table address(0x08020000)

It works well, but sometimes(when program modified), it doesn't work

I use debugger, and get result below

//Fault exception viewer

HardFault exception.

The processor has escalated a configurable-priority exception to HardFault.

  A precise data access error has occurred (CFSR.PRECISERR, BFAR) at data address 0x1fff8001.

Exception occured at PC = 0x80216ae, LR = 0x802b61d

See the call stack for more information.

//Debug Log

The stack pointer for stack 'CSTACK' (currently 0x200025C8) is outside the stack range (0x20009170 to 0x2000A170) 

What is the problem?

Can you help me?

[AvaTar]

Have you tried to pinpoint the exact location (instruction) where the fault happens ?

Perhaps you tried to access peripherals not yet enabled ?

[mcho.19]

Thank you AvaTar

But, I don't know what i can

I try to debug program only, it works well.

I try to set program address and vector table 0x0800 0000, it works well.

Therefore, I guess set register or interrupt error when jump from 0x08000000(boot loader) to 0x08020000(program)

I made program it works well,

And, add 2lines in any function, uint8_t buf[10] and memset ( buf, 0x00, 10)

then, program halt and same issue

It work well at 0x08000000 or 0x08020000 starting by debugger

It's so hard to solve

[AvaTar]

Does the application set it's own vector table properly ?

Sounds like it uses the BL table.

In a similar application I have, the application sets the VTOR as one of the very first things in the reset handler.

[mcho.19]

I set icf file

define symbol __ICFEDIT_intvec_start__ = 0x08020000;

/*-Memory Regions-*/

define symbol __ICFEDIT_region_ROM_start__ = 0x08020000;

define symbol __ICFEDIT_region_ROM_end__  = 0x080FFFFF;

I set stm32f2xx.c file

​#define VECT_TAB_OFFSET 0x20000 

void SystemInit(void)

{

 RCC->CR |= (uint32_t)0x00000001;

 RCC->CFGR = 0x00000000;

 RCC->CR &= (uint32_t)0xFEF6FFFF;

 RCC->PLLCFGR = 0x24003010;

 RCC->CR &= (uint32_t)0xFFFBFFFF;

 RCC->CIR = 0x00000000;

 SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */

}

#define FLASH_BASE      0x08000000U /*!< FLASH(up to 1 MB) base address in the alias region             */

[AvaTar]

Our BL-loaded firmware does this as the very first thing in the reset handler:

 ; relocate the VTAB to the location in the firmware (0x30000)

LDR    R0, =__vector_table          ; get pointer to vector table

LDR    R1, =0xE000ED08              ; store the table address to NVIC VTOR register

STR    R0, [R1] ; Vector Table Relocation in Internal FLASH

IAR WB, but for another (non-ST) MCU, though. And your application project needs to map the vector table there, of course.

[mcho.19]

Where should I insert that code?

[AvaTar]

I showed this code just as example. I hope you understood that addresses do not match - it is actually for a Cypress FM4 MCU.

> Where should I insert that code?

For our application, we created a derived startup code (using the IAR-supplied "startup_***.s" as starting point), which relocates the vector table, and sets the stack pointer from that table.

Afterwards, SystemInit and __iar_program_start are called (as usual).

[mcho.19]

Ok, I see, I know that is example code (vtor 0x30000)

This is my startup code

-----------------------------------------------------------------

    MODULE ?cstartup

    ;; Forward declaration of sections.

    SECTION CSTACK:DATA:NOROOT(3)

    SECTION .intvec:CODE:NOROOT(2)

    EXTERN __iar_program_start

    EXTERN SystemInit

    PUBLIC __vector_table

    DATA

__vector_table

    DCD   sfe(CSTACK)

    DCD   Reset_Handler       ; Reset Handler

    DCD   NMI_Handler        ; NMI Handler

....

-------------

SystemInit() calls here, and SystemInit() set vtor