On Monday, 15 February 2021 16:51:06 GMT Patrick Wigmore wrote:
> mp3_player_start() contains a while loop, and it looks like that is
> not supposed to terminate until playlist_index == 0.
>
> If your interrupt handler calls restartmp3(), and restartmp3() calls
> mp3_player_start(), then the interrupt handler will not terminate
> until playlist_index == 0 and both functions return. So, I think that
> might be the problem.
>
> I don't think you've posted enough code to know for sure, but if this
> is what's going on, then I think I would try having the interrupt
> handler run mp3_player_start() in a new thread. That way, the
> interrupt handler should terminate as soon as it has set the thread
> going, leaving mp3_player_start() to carry on on its own.
>
> e.g.
>
> threading.Thread(target=mp3_player_start).start()
Patrick,
Thanks. I was beginning to realise (dimly) that it was something like this
and have been trying to ensure that all functions exited cleanly.
Ideally, I think that rather than having my program start the MP3 Player
during startup it needs to always be started from an interrupt and that's what
I was looking at. That way the program will sit in the almost infinitely long
delay that was always the intention, except when an interrupt is being
serviced.
However, I can see that this isn't the whole story and I need to look into
your suggestion in a bit more detail. I won't have time to do that this
evening, so I'll have another go first thing in the morning.
Thanks again.
--
Terry Coles
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