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Senior
Jul 3, 2025 10:12 AM UTC
Solved

Signal Handler Called at 0xFFFFFFF9

My code gets complied without any errors. But just before the uploading completes: 
<signal handler> called at 0xfffffff9 is displayed.

Even though after that my code runs properly without any hardfault.

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TDK
TDKBest answer
Jul 3, 2025 1:49 PM UTC

0xFFFFFFF9 suggests an interrupt is called but the interrupt table is incorrect or erased. Probably the debugger is in an intermediate state.

If things are working, I wouldn't bother with it.

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1 reply

TDK
TDKBest answer
Jul 3, 2025 1:49 PM UTC

0xFFFFFFF9 suggests an interrupt is called but the interrupt table is incorrect or erased. Probably the debugger is in an intermediate state.

If things are working, I wouldn't bother with it.

"If you feel a post has answered your question, please click ""Accept as Solution""."