Develop Bugs

[KERNEL PATCH] Force AC (fast) Charging

This was a pretty big hit with the gnex and nexus s guys so I figure that I would extend it to the aries series phones:
This is for kernel devs only. The patch itself is useless to those who do not/can not compile their own kernel.
This patch allows one to force AC charging for any charger that is detected as USB (e.g. many car chargers) and pull the full current the charger can support. It also provides additional security when connecting to public charging stations because by forcing AC charging, USB/adb data transfers are disabled, protecting your data.
Fast charge can be toggled by issuing:
echo 1 > /sys/kernel/fast_charge/force_fast_charge
and off:
echo 0 > /sys/kernel/fast_charge/force_fast_charge
Some roms (AOKP) have also implemented toggles.
In addition I have created a toggle fast charge widget that may be used to toggle fast charge on and off right from your home screen:
https://play.google.com/store/apps/details?id=com.incredicontrol.fastchargewidget
You may also use IncrediControl (free) to toggle, however it does not fully support the aries series phones so features like voltage control do not work at this time.
https://play.google.com/store/apps/details?id=com.incredicontrol
For the widget (or any fast charge toggle) to work, you MUST be running a kernel that has this patch implemented.
As a good gesture to support a fellow dev, I ask that if you implement the patch into your kernel, please link to my widget as one means to toggle it. You are of course free to provide other ways to toggle it as well if you so desire.
Kernel devs, if you would like to test the widget yourself to confirm its working, and for convenience of testing, please contact me and I will provide you with a copy. You must show that you are a kernel dev though (i.e. link me to your kernel post so I can match your username).
Here you go. Good luck have fun:
http://www.incredikernel.com/wp-con...download.php?id=aries_force_fast_charge.patch

Thank you very much. I already have included it in my latest kernel
Sent from my I9000 running Android 4.03

Can you measure the current value with this feature and without?

Yes thanks derteufel. Already tried it with devil2 kernel. Great work

-ReaL- said:
Can you measure the current value with this feature and without?
Click to expand...
Click to collapse
When it is enabled, the phone detects all chargers as AC and your current draw is dependent on the source you're charging from. For example, if you're charging from a 1A usb source (such as a powered hub, car charger) you should get currents close to that from a wall charger. With it disabled it reverts to the factory detection of charge sources and anything detected as USB is limited to 500mA.

I use the original Vehicle Dock from Samsung (ECS V968) for holding my Phone on the Windshield in Car!
Plugging in my phone normally switches over to Sound redirection (by xcaliburinhand) and charges via 12v Car plug!
The charging isn´t working anymore !!!
Phone directly on 12v car plug: CHARGING !
Phone on USB port: CHARGING !
Phone on Vehicle Dock which is connected to either 12v Car plug or USB port : NOT CHARGING !
Ive tested with other phones (stock firmware) and it works ...so the car dock is not the problem!
Im using WeUI 0.9.8 with Semaphore Kernel 1.0.0
I dont know whether fast charge may be the source of that problem.
any idea ???

sebsch1991 said:
I use the original Vehicle Dock from Samsung (ECS V968) for holding my Phone on the Windshield in Car!
Plugging in my phone normally switches over to Sound redirection (by xcaliburinhand) and charges via 12v Car plug!
The charging isn´t working anymore !!!
Phone directly on 12v car plug: CHARGING !
Phone on USB port: CHARGING !
Phone on Vehicle Dock which is connected to either 12v Car plug or USB port : NOT CHARGING !
Ive tested with other phones (stock firmware) and it works ...so the car dock is not the problem!
Im using WeUI 0.9.8 with Semaphore Kernel 1.0.0
I dont know whether fast charge may be the source of that problem.
any idea ???
Click to expand...
Click to collapse
Semaphore doesn't have fast charge implemented.

Just curious, but is this bad for the battery?

shadehh said:
Just curious, but is this bad for the battery?
Click to expand...
Click to collapse
And second question: how fast does this fast charge charges standard 1500 mah i9000 battery (from around 0% to around 100%) ?

HI!
I'm trying to add the patch to my kernel (Sony Xperia Arc - MSM 7x30 device) but I'm kinda lost when looking at the msm72k_udc.c file.
Can you please help to out? I cant seem to find some of the lines you're deleting in the patch, hence the functions break.
this is the file i'm trying to modify...
This is my first project and i'm not that skilled yet, but i'm learning...
Thanks for the help in advance...

bipbop said:
And second question: how fast does this fast charge charges standard 1500 mah i9000 battery (from around 0% to around 100%) ?
Click to expand...
Click to collapse
shadehh said:
Just curious, but is this bad for the battery?
Click to expand...
Click to collapse
Not bad at all. The phone will not charge any faster than it would on AC charging, therefore its no worse for your battery than charging from an AC charger. I do not believe in increasing the charge current to the phone beyond what the factory specs are.
jimbo77 said:
HI!
I'm trying to add the patch to my kernel (Sony Xperia Arc - MSM 7x30 device) but I'm kinda lost when looking at the msm72k_udc.c file.
Can you please help to out? I cant seem to find some of the lines you're deleting in the patch, hence the functions break.
this is the file i'm trying to modify...
This is my first project and i'm not that skilled yet, but i'm learning...
Thanks for the help in advance...
Click to expand...
Click to collapse
I'm working on a patch for the play / arc. Its taking a bit more work than the aries series phones, PM me and you can test.
I apologize for the delayed responses.

StarTech USB Y Cable *Double your charging speed*

I haven't seen anybody mention this yet here on the forum, so I went ahead and bought one and tried it myself.
http://www.amazon.co.uk/dp/B0047AALS0/ref=asc_df_B0047AALS09152658?smid=A1AUCPBF2P18HS&tag=googlecouk06-21&linkCode=asn&creative=22218&creativeASIN=B0047AALS0
This is a USB Y cable. Two USB type A plugs to increase charge capacity from 500mA to 1A.
I use Siyah kernel with STweaks to change USB charge capacity from 500mA to 900mA, I am currently looking for a way to increase this to the full 1A.
Only £3.99 from Amazon. Tested using CurrentWidget. Charging now at 900mA.

danieljamie said:
I haven't seen anybody mention this yet here on the forum, so I went ahead and bought one and tried it myself.
http://www.amazon.co.uk/dp/B0047AAL...de=asn&creative=22218&creativeASIN=B0047AALS0
This is a USB Y cable. Two USB type A plugs to increase charge capacity from 500mA to 1A.
I use Siyah kernel with STweaks to change USB charge capacity from 500mA to 900mA, I am currently looking for a way to increase this to the full 1A.
Only £3.99 from Amazon. Tested using CurrentWidget. Charging now at 900mA.
Click to expand...
Click to collapse
Can't you just buy a 1mA output charger. I have chargers that will fully charger my phone in about 1hr and 30min.
Sent from my SPH-L710 using xda premium

smark72 said:
Can't you just buy a 1mA output charger. I have chargers that will fully charger my phone in about 1hr and 30min.
Sent from my SPH-L710 using xda premium
Click to expand...
Click to collapse
It's designed for PC's and Laptops which only output 500mA on their USB ports.

Would work really well with the KiDiGi Cover-mate Dual Desktop Cradle, too bad it is a tad to expensive seeing that it is just a cable

Hey i have this cable which came with my 2.5 HDD external case. In some places i need to connect both cables to power the HDD so you think it will work same with S3? Also will it not damage it?

Exactly what I was looking for
danieljamie said:
I haven't seen anybody mention this yet here on the forum, so I went ahead and bought one and tried it myself.
This is a USB Y cable. Two USB type A plugs to increase charge capacity from 500mA to 1A.
I use Siyah kernel with STweaks to change USB charge capacity from 500mA to 900mA, I am currently looking for a way to increase this to the full 1A.
Only £3.99 from Amazon. Tested using CurrentWidget. Charging now at 900mA.
Click to expand...
Click to collapse
this was exactly what I was looking for.. Thanks a lot.. I also has Siyah kernel, and many USB 2 ports available at work, and like to keep my AC charger at home.

This cable won't give you 1A. I guess the second USB plug has no data connection (how could it? ) and without a registered USB device a USB port gives only a few mA of power.

It does work with 2.5" harddrives that need more power than one USB port can deliver. Why shouldn't it work with the s3?
But why would you need that when you are charging your phone at work? It's not like you're in a hurry. It can sit there all day.
And I wouldn't try to charge it with 1A or more just to save a little time. The charger you get with the s3 an the s3 itself are made for 900mA. That's why the kernel is limited to 900mA aswell. You might damage your phone by charging it with a higher current. Sure, there is a safety margin build in but going to the limit seldom is a good idea.

weisselstone said:
This cable won't give you 1A. I guess the second USB plug has no data connection (how could it? ) and without a registered USB device a USB port gives only a few mA of power.
Click to expand...
Click to collapse
This was correctly answered back in August (above). What does data have anything to do with current? It simply has 2 plugs so that it can draw more current (mA).
shamez23 said:
It does work with 2.5" harddrives that need more power than one USB port can deliver. Why shouldn't it work with the s3?
Click to expand...
Click to collapse
This.
shamez23 said:
But why would you need that when you are charging your phone at work? It's not like you're in a hurry. It can sit there all day.
And I wouldn't try to charge it with 1A or more just to save a little time. The charger you get with the s3 an the s3 itself are made for 900mA. That's why the kernel is limited to 900mA aswell. You might damage your phone by charging it with a higher current. Sure, there is a safety margin build in but going to the limit seldom is a good idea.
Click to expand...
Click to collapse
No, you can't damage it that way. Electronic devices DRAW current, which means that they only take as much as they are able to. You can plug your phone into a 5A charger and it wouldn't damage it. Too much voltage WILL fry it though.

Are you sure about that?
I've read more than once on tech sites that for example the 2A charger of the iPad will charge other devices that come with weaker chargers faster but that they advice against doing that on a regular basis.
I do use industrial Li-ion batteries (18650) on several other devices and the charger I use for those has a switch with witch I can decide if I want to charge them at 500mA or at 1000mA. Reading in forums that specialize on devices that use those batteries and that have users that seem to know quite a bit about batteries and do extensive testing with sophisticated equipment, the general opinion is, that using lower Amps will prolong the lifetime of your batteries and that too high currents can potentially damage them as of course will overcharging them.
http://batteryuniversity.com/learn/article/ultra_fast_chargers
http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
I don't know much about battery technology so I might be wrong. I always had problems to wrap my head around anything that has to do with electricity and electronics in general and have to use analogies to understand and explain how things work in that area. Those analogies don't always apply completely.
The one I have in this case is the following:
I decide how much I can eat. I can eat at a normal pace until I'm full but I can also stuff myself and eat a lot more than I would normally do in a short period of time. I know that the later is a bad idea and won't do me much good but it is possible.
If you are correct with what you said, batteries could draw a higher current than what the original charger is delivering, up to their limit but that could still be too much and harm them.
I don't know. Now I'm confused.

shamez23 said:
Are you sure about that?
Click to expand...
Click to collapse
You have a point. I guess it depends on how well the charging circuitry (in the phone) is designed.
The battery itself won't limit the voltage/current (*). It's the charging circuitry that does this. For instance, if you connect the battery directly to a power supply and give it too much juice, it WILL damage the battery. Similarly, if the charging circuitry supplies too much to the battery, then this could also happen. However, it SHOULD be designed with appropriate tolerances and safety margins in mind. Therefore, it depends on how much you trust the hardware.
In that way, I guess charging at 500 mA would be considered safer. That being said, I'm happy plugging my phone into the wall charger every night, whether it's 900 mA or 1A.
(*) I know that Lithium batteries usually have built-in circuitry for safety measures, so they MIGHT have something that limits voltage/current, but I'm not sure.

900mA should be save. After all that's what Samsung gave us.
It's just that some people tweak their kernels to 1.25mA or even more. That's quite a bit higher than the specs and probably close to the safety margin.
It won't even charge your batterie faster that way. At least not when you talk about fully charging it. It will get faster to about 80% charge but after that it will take just so much longer to get to 100% that in the end it takes the same amount of time.
I'll stick to the original Samsung charger or the charger of my old HD2 that I have lying around. Makes me feel safer.

[Q] [ION and possibly others] Phone loosing charge while charging via car charger

Hi,
I use my Xperia Ion (running rooted stock JB) as a navigation and dashcam unit. So naturally I want it plugged in while I have it in my car. However I have noticed a slight "bug". The way I understand how the charging works is that the phone will charge at full power (1-1.2A) until a certain point (% of battery) and then go into trickle charge mode (300 to 600mA). When using my phone the following function are in use:
Bluetooth
LCD
GPS
Camera
Wi-Fi/mobile data
Phone
This will all need power. And while the phone does seem to charge in the car if the battery is low (>50%), it will stop at 70ish %. Depending on the charger I use it will stay at 70% or start draining again. With some chargers the phone only drains power and will never charge unless I keep power use to a minimum. I.e. not use it.
I have tried many power sources. These include:
Motorola dual port charger (for Motorola Atrix car dock)
Quality brand universal USB charger
Sony Xperia charger
Laboratory power supply with different configurations on the USB data pins
(shorting D+ and D-, voltage divider 2.1V on both pins, 2.5V on one and 2.1V on the other pin) the last config offered fast charge (1A)
The Phone does not seem to be smart enough to know that it needs more power and should therefore not enter slow charging mode if the power drain is higher that the power input. I have measured the current while the phone is charging and have determined that the phone indeed does charge with high current in the beginning but then lowers the current as the battery voltage increases.
My Question is then as follows:
Do other people suffer the same problem with their phone when trying to use it a lot while charging with a car charger like me? Does the phone also discharge while "charging" with a car charger? Does the phone only charge to the certain point and then stay there or even discharge again?
And the most important question:
Is there a way to make the phone stay in full fast charge mode?

t.Lancer said:
Hi,
I use my Xperia Ion (running rooted stock JB) as a navigation and dashcam unit. So naturally I want it plugged in while I have it in my car. However I have noticed a slight "bug". The way I understand how the charging works is that the phone will charge at full power (1-1.2A) until a certain point (% of battery) and then go into trickle charge mode (300 to 600mA). When using my phone the following function are in use:
Bluetooth
LCD
GPS
Camera
Wi-Fi/mobile data
Phone
This will all need power. And while the phone does seem to charge in the car if the battery is low (>50%), it will stop at 70ish %. Depending on the charger I use it will stay at 70% or start draining again. With some chargers the phone only drains power and will never charge unless I keep power use to a minimum. I.e. not use it.
I have tried many power sources. These include:
Motorola dual port charger (for Motorola Atrix car dock)
Quality brand universal USB charger
Sony Xperia charger
Laboratory power supply with different configurations on the USB data pins
(shorting D+ and D-, voltage divider 2.1V on both pins, 2.5V on one and 2.1V on the other pin) the last config offered fast charge (1A)
The Phone does not seem to be smart enough to know that it needs more power and should therefore not enter slow charging mode if the power drain is higher that the power input. I have measured the current while the phone is charging and have determined that the phone indeed does charge with high current in the beginning but then lowers the current as the battery voltage increases.
My Question is then as follows:
Do other people suffer the same problem with their phone when trying to use it a lot while charging with a car charger like me? Does the phone also discharge while "charging" with a car charger? Does the phone only charge to the certain point and then stay there or even discharge again?
And the most important question:
Is there a way to make the phone stay in full fast charge mode?
Click to expand...
Click to collapse
I had the same problem, I changed from Stock JB to Rogers Slim JB and calibrate the battery with this https://play.google.com/store/apps/details?id=com.nema.batterycalibration&hl=es
It helps somehow, but battery sometimes using the phone to much on car charger loses charge.

[Q] Using a 5v USB Wall Charger on a Zenfone 2 with +9v battery?

I ordered the 4gb ram version of Zenfone 2 and it only comes with the "Boostmaster" quick charger that outputs 9v and 2A.
Also, I saw pictures where the visible part of the battery in the phone says "+9v 2A" on it.
I want to know is it safe to use a regular 5v USB charger to charge this phone if I do not want to use the quick charger?
I am not sure since I read through some websites and I am concerned about these quotes:
Too low voltage may do damage. Slightly too low may work AOK or at
reduced current. Too low may damage equipment but not usually. Too low
may damage charger but not usually.
Click to expand...
Click to collapse
If the voltage is too low, you'll get either nothing, or odd / failure
behavior when the power draw on the system gets high.
Click to expand...
Click to collapse
I'd be more worried about the undervoltage. It may put a strain on the
voltage regulator in your laptop and may also put a strain on your
battery
Click to expand...
Click to collapse
So I want to know does the zenfone 2 has a special battery that allows lower voltage? Is its battery really a 9v battery?

I use a 5V charger, but the 2GB Zen has a 5.2V charger. There's nothing wrong with using weaker plugs, though the charge time is roughly 3-4hrs with the one I use.
"I'd Totally Hug You, If That Was Something I Did"

I took the back off and the battery the, it says 5.2 v and 9v on it for input so I guess you can use either one on it

oh, I didn't know it says that on battery, I didn't receive my phone yet, but all the pictures I 've seen on reviews and when I googled the image, all I see on the battery is "Input +9v 2A, 18W"
does the US version have the extra 5.2v printed on the battery?

VietnamTom said:
oh, I didn't know it says that on battery, I didn't receive my phone yet, but all the pictures I 've seen on reviews and when I googled the image, all I see on the battery is "Input +9v 2A, 18W"
does the US version have the extra 5.2v printed on the battery?
Click to expand...
Click to collapse
Yes. My 4GB model has both on it.

I've used a non QC charger on it and it worked fine. I mainly have QC's now so I use those when my phone doesn't have qi support. It chargers fine with the following Quick Charge 2.0 chargers: Aukey 10000mah battery pack, Asus boost master, Motorola Turbo, Incipio car charger, Power Partners 30w. I haven't had any issues charging it yet but it does get warm (battery hits 119 °F) using the Asus charger and cable.

Ive used multiple charging blocks that have 1 Amp and each time the charging stops at 77% and stays there overnight. This is kind of dumb I think. Anyone else having this issue when not using the stock charging block? Hmm it actually seems that this is happening on my cords that are 6 feet in length. The short cords are working fine

downshift00 said:
Ive used multiple charging blocks that have 1 Amp and each time the charging stops at 77% and stays there overnight. This is kind of dumb I think. Anyone else having this issue when not using the stock charging block? Hmm it actually seems that this is happening on my cords that are 6 feet in length. The short cords are working fine
Click to expand...
Click to collapse
Had issues with long cords before, mostly they would take ages to charge.
I'm using the stock Samsung Note 3/4 charger with no issue and the samsung cable.
It's easier to use than to unpack and find an Aussie adaptor for the ASUS charger....

Please see the following ASUS support page: "Introduction to quick charge"
http://www.asus.com/us/support/Sear...5-480F-AADA-FE49EDD81C01/?keyword=boostmaster
Sincerely,
ASUS_USA

VietnamTom said:
I ordered the 4gb ram version of Zenfone 2 and it only comes with the "Boostmaster" quick charger that outputs 9v and 2A.
Also, I saw pictures where the visible part of the battery in the phone says "+9v 2A" on it.
I want to know is it safe to use a regular 5v USB charger to charge this phone if I do not want to use the quick charger?
I am not sure since I read through some websites and I am concerned about these quotes:
So I want to know does the zenfone 2 has a special battery that allows lower voltage? Is its battery really a 9v battery?
Click to expand...
Click to collapse
I've charged on other charger when I grabbed the wrong one, but it won't do a full charge. I can only get about 75% on standard charger. Plug in the fast charger and it charges right up.

it should be fairly okay else it wouldn't be safe to plug this device into sa normal USB port (5v)

Ampere APP and "max. possible USB current"

Hello N5X users. As far as you probably know, Ampere has now functionality for measuring maximum possible USB current.
I've noticed one interrested thing when charging (during testing some C2C cables). When I'm repeatedly connecting my original Google's A/C typeC chager, readings give always different values - very often less than 3000mA (meanwhile other apps show value 3000 which is the teoretical maximum). With some crappy C2C cables even less. I dont understand what it does mean and how do they compute the maximu possible USB current. Can you give me a clue? Do you have similar experience?
I'm wondering whether my USB charger is working correctly. I.e. my PCI-E ASUS extension card gives max. possible USB current 3000mA (reported by Ampere) at every attempt.
Thank you for sharing your experiences.

To work out the current we need to know the resistance of the cable (including the resistor). So the way we do this is by taking the voltage and sharing it by the resistance to give us current.
We can work out the resistance in a cable though by taking the voltage and sharing it by the current.
The USB c to a cable that I have draws 600mA so the resistance in the cable (this includes the resistor) is: 3100mV shared with 600mA which is 5100mOhm or 5.1 ohm

The question is why my phone with the same cable and charger often reports different maximum possible current (3000mA, 2100mA, 1900mA, ...).

It will depending on the charge of the battery and the temp of the phone. The charging circuit will pull only what it needs or what is safe.
Sent from my Nexus 5X using Tapatalk

Of course it depends on temp and level of charge. But I'm talking about situation which is happening almost at the same moment. I was trying to plug and unplug it over and over again (with the same level of charge and temperature) and the maximum possible USB current was often different - 3000mA then 2300mA ater that 2100mA and then again 3A. I still don't know the way they compute this max. possible value (because the resistor in the cable should tell what is the maximum current - 3000mA, 1500mA or standard USB port).
This happens with the original Google charger but not with ASUS PCI-E card in my computer (it alwas reports 3000mA) using the same cable.
Is there anybody who could try to measure max. possible current using Ampere app and A/C charger? A few attempts of plugging and unplugging would be enough.
Thanks!

I don't know if you found out what was going on... Did you? I'm observing exactly the same in my N5X
Desde el móvil...

I also see different max USB current settings each time I plug a USB charger in then unplug and plug back in again
Sent from my Nexus 5X using XDA-Developers mobile app

Additionally, I would like to ask you all if it's normal that Ampere reports positive mA (so charging), but the % si descending... ¿¿¿???
My phone is a Nexus 5X, with Mashmallow. No other method of obtaining charge in basic options.

marshall.cze said:
Hello N5X users. As far as you probably know, Ampere has now functionality for measuring maximum possible USB current.
I've noticed one interrested thing when charging (during testing some C2C cables). When I'm repeatedly connecting my original Google's A/C typeC chager, readings give always different values - very often less than 3000mA (meanwhile other apps show value 3000 which is the teoretical maximum). With some crappy C2C cables even less. I dont understand what it does mean and how do they compute the maximu possible USB current. Can you give me a clue? Do you have similar experience?
I'm wondering whether my USB charger is working correctly. I.e. my PCI-E ASUS extension card gives max. possible USB current 3000mA (reported by Ampere) at every attempt.
Thank you for sharing your experiences.
Click to expand...
Click to collapse
The answer is simple. AMPERE does not work in the Nexus 5X under Marshmallow. I tested with a variety of cables and chargers, all passing the current through an inline USB Volt/Amp meter. The amps reading on the meter bore no relationship to the indicated value from AMPERE. Nor did the app give a sensible value when plugged into the Nexus-supplied charger.