Rockbox mail archiveSubject: Patch: Battery Levels, Arbitary level enums + WPS Features/Fixes.
Patch: Battery Levels, Arbitary level enums + WPS Features/Fixes.
From: gl <gl_at_ntlworld.com>
I've now completely implemented this, as well as enabling arbitrary battery
Patch & demo WPS here: http://www.rockbox.org/bugs/task/4802
Note that there's a change from my previous example; there is no step 5
Assuming the 'original' off + 4 segments, this gives us the same 0-4 as in
4 = 100-76% 4 segments visible
Where danger level is currently < 15mins estimated remaining time.
-- gl ----- Original Message ----- From: "gl" <email@example.com> To: "Rockbox development" <firstname.lastname@example.org> Sent: Tuesday, March 07, 2006 2:55 AM Subject: Re: WPS battery levels wrong? > > OK, I've thought about this some more, and the current scheme seems wrong. > > As a user I expect each battery segment to signify 25%, so when the first > segment disappears, this should mean 75% is left. Under the current > scheme, it means 80% is left. And worse, we are extinguishing all > segments as early as 19% - that doesn't make sense. > > I think we can fix this and improve on it. First we can lift the battery > level count restriction (as I mentioned recently I'm working on this: > http://www.rockbox.org/bugs/task/4783) so a WPS designer can use however > many battery segment bitmaps they choose. > > With that in mind, assuming the designer wants 4 battery segments as > before, > I propose: > > 0 = 0-[danger level]%, no segments visible, device will shut off shortly > > (assuming 4 enums are used) > 1 = [danger-level+1]-25%, 1 segment visible > 2 = 24-50% 2 segments visible > 3 = 51-75%, 3 segments visible > 4 = 76-99% 4 segments visible > (assuming 4 enums are used) > > 5 = 100% (optional, can be used to show a 'completely full' bitmap) > > The danger level should be derived from the estimated time remaining, eg. > when only 10 mins are left, so it's consistent over a wide range of > original and replacement batteries. > > This scheme would be backwards compatible, and should also correct the > segments on all existing WPS'. > > Are there any problems with me implementing this? > -- > gl > > ----- Original Message ----- > From: "gl" <email@example.com> > To: "Rockbox development" <firstname.lastname@example.org> > Sent: Sunday, March 05, 2006 9:39 AM > Subject: WPS battery levels wrong? > > >> >> I'm confused about the number of WPS battery levels. The CustomWPS >> online docs suggest there are 5 ("0-4"), and 4-segment battery bitmaps >> are common. >> >> However, the code in gwps-common.c does this: >> >> int l = battery_level(); >> *intval = l / 20 + 1; >> >> Which produces 1-6, presumably: >> 1 = 0-19% >> 2 = 20-39% >> 3 = 40-59% >> 4 = 60-79% >> 5 = 80-99% >> 6 = 100% (fully charged) >> >> You can confirm this with: >> BATTERY: ?%bl<1,2,3,4,5,6> >> >> Shouldn't the code use / 25? >> -- >> gl > >Received on Wed Mar 8 12:47:23 2006
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