STM32f407 HardFault

licencje1 · ‎2015-06-03

Posted on June 04, 2015 at 00:35

Can somebody explain me how to find cause of hardfault? I try to use solution from

http://blog.frankvh.com/2011/12/07/cortex-m3-m4-hard-fault-handler/

but buffer is empty.

Here are core registers dump (from keil UI):

SP = 0x20001178

LR = 0xFFFFFFF1

PC = 0x08006604

xPSR = 0x61000003

MSP = 0x20001178

PSP = 0x00000000

Is it possible to find instruction that cause hard fault?

#stm32 #hardfault #m4

Tesla DeLorean · ‎2015-06-03

Posted on June 04, 2015 at 00:54

If I were doing it manually, I'd look at the code pointed at by the PC (Program Counter)

I'd dump the 32-bit words are the top of the stack (SP), and look for addresses in the 0x08000000 FLASH memory.

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licencje1 · ‎2015-06-03

Posted on June 04, 2015 at 01:07

I don't understand what you meat writing ''

I'd dump the 32-bit words are the top of the stack (SP), and look for addresses in the 0x08000000 FLASH memory.'' Could you explain it clearly for me?

waclawek.jan · ‎2015-06-04

Posted on June 04, 2015 at 13:47

SP is the stack pointer and the stack grows downwards, so dump the memory above SP (look at it in the debugger) and investigate. The old program counter is stored at [SP + 0x18].