> Hello everybody.
>
> I've got a question about interrupt handling and asynchronous serial
> communication.
>
> In my application I'm counting how often an input signal on a comparator
> raises a certain level. After about 1 second the counted pulses are
> transferred via the UART to the PC. The counting is realized by
> interrupts trigerred by the comparators.
>
> But strange things happen: Mostly after the first byte is transferred
> via the UART (and read on the PC screen), the circuit freezes. Actually
> I expect 3 Bytes per second but after the transmission of the first byte
> nothings happens any more. But not very often I can read 2 or 3 Bytes
> before it gets stuck, but most of the time it freezes after one
> transmitted byte.
>
> I belive there must be something wrong with the interrupt setting but
> after having gone through the datasheet for several times I can't see
> where my fault counld be. I've attached the .asm code so If anyone of
> you has the time to have a look at it and can help me, I'd be very happy.

        Have you simmed it? It sounds like it's pretty simple to set up a sim,
while it might take a couple minutes to get the result it should be pretty
easy to figure out WHERE it is getting stuck. TTYL

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