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Subject: Re: Some H340 impressions

Re: Some H340 impressions

From: Will Robertson <aliask_at_gmail.com>
Date: 2006-01-05

To save battery life. Increasing the CPU frequency increases the amount of
power it consumes, so in the interests of conseving battery life it is kept
to a minimum.

On 1/5/06, John Lawrence <blaquestic@gmail.com> wrote:
>
> why is the CPU boosted at times, and not boosted at other times?
> -John
> On 1/4/06, Daniel Stenberg <daniel@rockbox.org> wrote:
> >
> > On Tue, 3 Jan 2006, John Lawrence wrote:
> >
> > > I second everything Jonathan Corbet has said. In addition, sometimes
> > the
> > > scrolling decides to take a mind of its own. It continues to scroll
> > after I
> > > let go of the button or doesnt stop at all. Sometimes it just works
> > > perfectly.
> >
> > The continued-scroll-after-key-release is most likely because the key
> > repeats
> > happen faster than the LCD gets updated.
> >
> > The fact that it "works sometimes" is probably because this is not an
> > issue
> > while "boosted" (CPU runnning at 124MHz) since then the CPU runs fast
> > enough
> > to update the LCD faster than the key repeat, and if you play music
> > while
> > doing this it will boost every now and then for audio decoding purposes.
> >
> > We've discussed several different approaches to solve this, one of
> > course
> > being to enhance the LCD update function to run faster but another way
> > could
> > be to increase the low CPU speed used to something like 60MHz.
> >
> > --
> > Daniel Stenberg -- http://www.rockbox.org/ -- http://daniel.haxx.se/
> >
>
>
Received on Thu Jan 5 03:51:57 2006


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