[avr-gcc-list] Problems porting from CodeVisionAVR to WinAVR

[Curtis Maloney]

Greetings,

	We've recently decided to migrate all of our AVR development to avr-gcc, for 
various reasons.

	We figured as a good exercise we'd port some existing, working code from cvavr. 
 And weren't there some differences.

	No longer the handy notation of PORTx.y for accessing port pins, and declaring 
interrupts is a little different, but in general the changes have been  simple 
and minor.

	However, this has not yet resulted in success.  For some reason, whenever we 
enable the Timer 0 Overflow interrupt, the setup resets.  Not immediately, of 
course, but after the timer expires.

	So far, I've checked we're not overflowing the stack, ensured the correct 
signal declaration is included, ensured the binary is being generated 
correctly... it just seems it's never hitting the interrupt (even put "UDR = 
'!'" as the first instruction in the handler... no luck).

	So it looks to me like it's hitting the generic bad interrupt handler.  But 
providing a __vector_default function still doesn't result in any noticeable output.

	Anything else I can test/check?  This hardware does work with the CVAVR 
generated code.

--
Curtis Maloney