AW: [avr-gcc-list] Timer Interrupt Problem on ATmega 103L

[Peter Hierholzer]

Hi Andrew,

a possible additional cause of your problem might be

In page 42 in http://www.atmel.com/dyn/resources/prod_documents/Doc0945.pdf
it is written that after setting the ASSR bit the TCNT0 might get corrupted.
If this corruption sets the TOV0 bit in the TIFR register an interrupt is
pending. All further TOV0 interrupts are blocked.

Can you check whether the TOV0 bit in the TIFR is already set when you
activate the global ints with sei();


mfg

Peter