HardFault debugging — reading CFSR, HFSR, and MMFAR registers
The default hardfault handler is while(1). It tells you nothing. Reading the fault status registers gives you the exact instruction, memory address, and fault type.
Why generic AI tools miss this
Generic AI code review and debugging tools are trained primarily on web and backend code. HardFault Debugging requires understanding of hardware-software interaction at the register level — something that represents a tiny fraction of any general model's training data.
The danger is that a generic tool will give you advice that looks correct but misses the hardware-specific nuance. For hardfault debugging, the nuance is everything — a subtly wrong answer compiles, links, and flashes successfully, then fails in the field.
Affected MCU families
HardFault Debugging is particularly relevant to these platforms. Each has its own variant of the problem and its own mitigation strategy.
How usefirmware helps
Our AI tools are purpose-built for firmware. They understand hardfault debugging at the register level and can catch it during:
Related concepts
Other firmware problems
Catch hardfault debugging before it ships
Don't wait for field failures to find this. Get AI tools that understand hardfault debugging at the hardware level.
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