On 11/29/2015 06:54 PM, Jeppe Johansen wrote:
Don't use noreturn. It signals to the compiler that your function will
not return (i.e. do an infinite loop).
Ok, this is good to know.
Use the interrupt directive for interrupt handlers. That makes them
emit the iret instruction instead of ret to return from the interrupt.
If you don't use that when you return from the ISR it will not have
interrupts enabled. That's why it only blinks once.
This is also good to know. Interrupts are new to me. On a side note the
procedure is called repeatedly using the noreturn keyword, but I'll
change it to interrupt.
I had not used "interrupt" because this warning was emitted when I used it:
project1.lpr(139,25) Warning: Calling convention directive ignored:
"OldFPCCall"
Only enable interrupts that you have written handlers for otherwise
they end up in the default handler which is an infinite loop as you saw.
TIMER0_COMPB and TIMER0_OVF are not called because you don't set
OCIE0B or OCIE0A in TIMSK0.
This makes sense.
Thanks very much for your input!
Andrew
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