David Brownell wrote:
> On Monday 11 January 2010, Thomas Kindler wrote:
>> Joseph Yiu suggested this code to cause a hard-fault:
>>
>> __asm(
>> "movs r0, #1 \t\n" // unaligned ..
>> "ldm r0, {r1-r2} \t\n" // .. load-multiple
>> "bx lr \t\n"
>> );
>>
>> (see http://www.st.com/mcu/forums-cat-6778-23.html)
>
> Doesn't that presume escalation to a HardFault because
> you didn't enable UsageFault in SHCSR, and the system
> handler priority registers cooperate?
>
> Not everyone uses that escalation logic. But if it
> works in your test cases, great. :)
Well, I only have to switch off PWM outputs in case of any error -- the
exact cause doesn't matter so much at the moment ;)
> My own runtime code enables all faults, so that if I
> override the default loop-to-self handler (by just
> providing a non-weak symbol) it will always kick in.
I tried that, also. But as I understand, the HardFault handler can be
used to find out the exact cause of the escalated fault anyways. So I
can have all my exception handling code in one place.
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