Rockbox mail archiveSubject: Re: Use SLEEP instruction for longer (?) runtime
Re: Use SLEEP instruction for longer (?) runtime
From: Linus Nielsen Feltzing <linus_at_haxx.se>
Date: Wed, 22 Jan 2003 23:01:56 +0100
On Wed, 22 Jan 2003 22:50:24 +0100, Simon ElÚn wrote:
> Question: In button.c the remote control is polled every tick. The
> comments seems to imply that it could work interrupt-driven
> instead, is it possible?
No, it will not work interrupt driven. The garbage that is generated
when the phones are inserted/extracted screws up the interrupt
handling. We moved from interrupt driven to polled for just that
> If not, can the poll frequency be slowed down without problems?
Should be possible, yes.
> Other than this, there seems to be nothing left (on the recorder,
> at least)
> that needs polling more often than about 20 times/s. Now a more
> intelligent scheduler seems a much better idea.
Intelligent == more complex. I want proof of a fairly substantial
power saving before we mess with the scheduler. There is a lot of
code that depends on the scheduler behaviour.
-- Linus Nielsen Feltzing, linus_at_haxx.se on 2003-01-22Received on 2003-01-22