We want to light up an LED when a hard fault occurs.

[pass3master]

We want to light up an LED when a hard fault occurs.

Please tell me in which handler I should put the GPIO processing.

Also, We would like to turn on the LEDs for faults other than Hard fault, is that possible?

[Andrew Neil · Accepted solution]

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@pass3master wrote:

We want to light up an LED when a hard fault occurs.

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Good idea!

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@pass3master wrote:

Please tell me in which handler I should put the GPIO processing.

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In the Hard Fault Handler!

On debugging Cortex-M Hard Faults - in general, and STM32 specifically:

https://community.st.com/t5/community-guidelines/how-to-write-your-question-to-maximize-your-chances-to-find-a/tac-p/708193/highlight/true#M51 

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@pass3master wrote:

Also, We would like to turn on the LEDs for faults other than Hard fault, is that possible?

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Of course - do it in the handlers for those faults

[pass3master]

Thank you for your prompt reply. It was helpful.