STM32F411 HardFault

[bean li]

Posted on August 16, 2017 at 04:00

There is much information for the hard fault:

SCB->HFSR: 40000000

SCB->CFSR: 400

MSP: 2000fb58 PSP: 200193b8  LR: fffffff1

r0: 0 r1: 2000dcd0 r2: 8000529 r3: 1 r12: 0 LR: 0 PC: 8030ba0 PSR: 2100000f

what method can solve ?

it's imprecise data bus error, i don't know how to do .

can you help me ? thanks

#stm32f4 #hardfault

[Tesla DeLorean]

Posted on August 16, 2017 at 14:53

Like all hard faults, start by looking at the faulting instructions.... Disassemble the one pointed too, and those immediately prior.

Imprecise likely means the fault is from a deferred write (ie write buffers), and the STR just before the current instruction caused the fault. Look at what address it is attempting to write to.

Dig through the stack.

[bean li]

Posted on August 17, 2017 at 08:09

I printed some values that in the stack. but i don't know why the LR is 0.

i can't use J-link tools ,just can print some information through UART .

[Tesla DeLorean]

Posted on August 17, 2017 at 10:27

Then generate a listing file and review the offending code from that.