Hard fault occur stm32 imprecise data access violation true studio.

[parth kothiya]

my application code running some time inside mcu then suddenly hard fault occur so i debug my application found hard fault occur inside mcu how to solve this.

[Tesla DeLorean]

Inspect the faulting code. There is likely a write instruction a few instructions earlier that is failing, thus the "imprecise" tag.

[Pavel A.]

See this document: Cortex M3/M4,M7 Faults tutorial

[parth kothiya]

problem solved i change interrupt priority high and low not same priority of both interrupt

[NMish.1]

how can i change the priority in stm32cube ide?

[KnarfB]

In the .ioc (device configuration) view > System Core > NVIC. There are also tbas for the individual periperals.

hth

KnarfB

[chima6464]

I know I'm several years late, but could you elaborate on this solution? I am running an RTOS and I am getting the same error. I have enabled various ISR's (UART, ETH, GPIO, DAC etc) and they currently all have the same priority. What would you change based on this knowledge?

[Tesla DeLorean]

Could be something entirely different.

Just diagnose WHY your situation is faulting rather than blindly shot-gunning.

Look at what's faulting, more likely to be bad pointer or misaligned write, or an insufficiently large stack.

Dump some useful / actionable data about what the system is objecting too.

https://github.com/cturvey/RandomNinjaChef/blob/main/KeilHardFault.c

NVIC has priorities and preemption levels and you can split how the bits are allocated.