[Distributed temperature and humidity acquisition system] + STM32H7-IAR environment online simulation RAM operation

lansebuluo

[Distributed temperature and humidity acquisition system] + STM32H7-IAR environment online simulation RAM operation [Copy link]

 

Debugging platform STM32H745XI-DISCO, software IAR9.10.2

1> Define the starting address of the interrupt space vector table in the ICF file

define symbol __ICFEDIT_intvec_start__ = 0x24000000;

2> Define the start and end addresses of the code area in the ICF file

define symbol __ICFEDIT_region_ROM_start__ = 0x24000000;
define symbol __ICFEDIT_region_ROM_end__ = 0x2403FFFF;

3> In IAR's Workspace->Project->Option->Debugger->Download, check Use falsh loader

I feel like it's all right now. I tried compiling it. It works fine at first, but once an interrupt occurs, the program crashes. What's going on?

Although we compiled the program to the starting address of the interrupt space vector table, when the CPU runs, it has a default address of 0x0800 0000.

This requires us to change this register, SCB->VTOR, during initialization.

4>In IAR's Workspace->Project->Option->C/C++ Compiler's Preprocessor under Defined symbols,

Added USER_VECT_TAB_ADDRESS, VECT_TAB_SRAM.

The starting point is to change SCB->VTOR to 0x24000000.

When the program runs to the main function, it needs to have some initialization code, some key configurations, including stack, variables that need to be initialized, etc.

火辣西米秀

After changing this register, SCB->VTOR, the program will not fly?

lansebuluo

Hot Ximi Show posted on 2023-3-5 22:11 After changing this register, SCB->VTOR, will the program stop flying?

You can try it, maybe this is the only step missing. From my debugging experience, modifying SCB->VTOR is a necessary step, so pay attention to it.