No image or animation doesn't mean that. May be kernel is not up in power off charge, but it's a wild guess. What device are u using?
On Thursday, February 16, 2012, Endy Silveira wrote: > Got the same device and want to do the same thing! > > BTW if the device doesn't show no images or animation when it's > plugged at charger and powered off, it means that the bootloader isn't > "used" at the charging process? > > Little googling and don't found the source code... What you recommend > to do? > > Bests, > Endy > > On 16 fev, 04:27, Tirtha Ghosh <[email protected] <javascript:;>> wrote: > > Definitely this depends on your h/w and the design on it. > > > > firstly, Android does not support power-off alarm (even RTC support is > > there in h/w). So with alarm, its not possible to wake up the system > (until > > you have a proper application to do so plus h/w RTC alarm support). > > > > secondly, power-off charging depends on vendor design. As Kolja > mentioned, > > 1. it can be done without waking Application processor (and charging can > be > > done by PMU h/w itself) - but these are rarely seen as for calculating > > battery capacity from h/w need more sophisticated h/w and thus increased > > price. > > 2. It can be handled at some level of bootloaders - this is very common. > > But now-a-days all devices shows proper battery level with charging > > animation at power-off charging. To implement the same in bootloader is > > little tricky and hard as it runs on single thread. > > 3. boot the kernel and instead of getting Android up just load thin > ramdisk > > where power off charging application can do all those I mentioned. > > > > @Levi > > Find out if source code for your device are openly available then you can > > have study of code and better understand the scenario. > > > > regards, > > TKG > > > > > > > > > > > > > > > > > > > > On Wed, Feb 15, 2012 at 5:34 PM, Kolja Dummann > > <[email protected]<javascript:;>> > wrote: > > > This pretty much depends on your Hardware. I dunno which hardware is > > > used in that Tablet. > > > > > So devices boot kernel to charge the battery, but some don't. Some > > > just use the bootloader some other do charging without booting up the > > > Application Processor and do this plain on the PMU. > > > > > So you have to find out if your device is booting a kernel or not to > > > charge. If it does, it likely that it is a simple logic in the init > > > process that doesn't start Android and just sets up the PMU for > > > charging. > > > If the device isn't powering the Application Processor or isn't > > > booting the Kernel there is no way to do what you want to do from the > > > Kernel. > > > > > Cheers Kolja. > > > > > On Tue, Feb 14, 2012 at 1:11 PM, Levi Ribeiro > > > <[email protected]<javascript:;> > > > > > wrote: > > > > I'm using an Android tablet (a Coby Kyros MID 7016) for an > application > > > > where I'd like the device to power on without using the power on > > > > button, via usb or setting an alarm. > > > > > > I've already tried installing some app, setting an alarm, turning off > > > > the device, and the device does not power on. > > > > That tablet doesn't charge via USB. > > > > > > So i think its something on the kernel, some hack that could fix > this. > > > > > > A bit of Googling revealed that I could modify the executable > /system/ > > > > bin/playlpm, but my device don't have this file (when I plug my > device > > > > in charger it doesn't show any image on the screen, theres just a led > > > > to indicate when the device is full charged). > > > > > > Anyone know how to improve this? > > > > > > Thanks in advance! > > > > > > -- > > > > unsubscribe: [email protected]<javascript:;> > > > > website:http://groups.google.com/group/android-kernel > > > > > -- > > > unsubscribe: [email protected]<javascript:;> > > > website:http://groups.google.com/group/android-kernel > > > > -- > > With Best Regards, > > *Tirtha* > > [image: Nico Nico animated GIF --] > > -- > unsubscribe: [email protected] <javascript:;> > website: http://groups.google.com/group/android-kernel > -- With Best Regards, *Tirtha* [image: Nico Nico animated GIF --] -- unsubscribe: [email protected] website: http://groups.google.com/group/android-kernel
