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[Q] Softcoded battery check in rom, to run on usb pwr only¿

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Thanks Meter: 55
By NiTrOwow, Senior Member on 4th February 2014, 10:55 AM
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Hey there,

I have a question towards XDA devs. I myself am not a dev, but just a hobbyist.

I got a small tablet already managed to run transmission(client) port with web interface on it.
Its a JXD S18 (cheapest device on the www). And it gets stuck/looped just after the manufacturer logo (logo.img) i guess this is the bootloader what in case i already have extracted..

Can someone point me to the right direction i would like to know more about

#is there any way to get rid of the entire function that checks the bat levels and displays the battery_pic when bat level below <x> % after the ?bootloader??
Where this function is used and if there is an easy way to just get rid of this battery level check on boot
The reason why i want to do this is because i want to make a small server out of the device and i don't need the battery anymore.
However the device does not turn on without battery.... It loops infinite at the battery_pic image as if its charging the battery.

If i hook up a battery to it i can still get it running but this is so... Clumsy and takes me 2 minutes to get it working. And if the lithium ion battery is empty i need to charge it first to get the device working... I added a small switch between the battery. So when started and running on usb power i can switch off the battery.

I would appreciate it if somebody can point me to the right direction.

1st March 2014, 06:39 PM |#2  
NiTrOwow's Avatar
OP Senior Member
Thanks Meter: 55
Can nobody answer my question or did the right person not visited my topic who can answer it?
If somebody is willing to spend some time on helping me, i would appreciate it a lot. Since i have no idea where to look.
18th November 2014, 10:55 AM |#3  
swcdude's Avatar
Junior Member
Thanks Meter: 0
Hi! I've noticed you were asking for help in the other thread. Sorry it's been months ago

Do you think you can connect the power to the former battery pads on the PCB? I would try to use USB 5V output with one silicone diode 1N4007 in series.
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