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Timur's Kernel - USB ROM - Most popular thread on Rootzwiki

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nexus-fan

nexus-fan

Android

  • 141 posts

Posted 25 January 2013 - 06:33 PM #381

In bootloader mode the N7 didnt charge (i guess in recovery too.),
i dont know why but it tooks many restarts (and of-course disable off-mode) till
the N7 started to charging.

Becuase i made fix install i think i have to do some changes:
1) Remove back cover and add cooling.
2) Add parallel battery, the original battery is weak.
3) Solder external buttons.
4) extend the tablet otg female to the accessible location, so if this case will return it will be much easier to fix it,
just disconnect the OTG and connect the original AC charger.

What do you think?

B) Timur, if i deviate the main subject i will open a new thread. (just let me know)
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iceman_jkh

iceman_jkh

Android Lover

  • 150 posts

Posted 25 January 2013 - 07:05 PM #382

For those new to using the N7 for media, here's the list of apps I'm using/will be using for my N7 based Car Media Centre:

Apps being used:
Timur's FI Kernel - Sleep/Wake/USB Host (donated) (http://mehrvarz.gith...-download-page/)
b0bd's Audio Focus grabber - Fixes USB DAC wake issues (Currently free. Hope to see a donate button when it's ready ;) ) (http://rootzwiki.com...30#entry1089438)
Tasker -Powerful scripting app ($5-purchased) (https://play.google....d.taskerm&hl=en)
Tablet Talk -Sms & call notifications from your android phone to N7 ($2-purchased) (https://play.google....apdroid.tabtalk)
GoneMAD Media Player - Excellent music player ($4-purchased) (https://play.google....id=gonemad.gmmp)
Utter - voice control (free - in beta) (http://forum.xda-dev...d.php?t=1508195)
GMD Gesture Control -Issue commands via gestures (on any screen) ($5.50-purchased) (https://play.google.....gesturecontrol) (A less capable free version is available)


Apps being trialed/tested:
Dock4Droid -Swipe dock (similar to the iMac dock) ($2- trialing) (https://play.google....urbandroid.dock)
ProjectM - Audio visualiser ($2.75-purchased) (https://play.google....psperl.projectM)
StickMount Pro ($2.50-trialing) (https://play.google....fire.stickmount) (A less capable free version is available)
Google Maps (using "Download Map for offline use" setting) for the moment. (https://play.google....droid.apps.maps) (do you really need a link to this? :P )

Hope this helps some people out B)

Edited by iceman_jkh, 25 January 2013 - 07:42 PM.

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nexus-fan

nexus-fan

Android

  • 141 posts

Posted 26 January 2013 - 01:55 AM #383

I didnt found any micro usb extender cable with 5 wires (i bought 2 and they dont...),
so i tought to build one that allow 2 modes: (using Switch)
1) OTG
2) PC connection\ Quick charge


Posted Image
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OP Timur

Timur

Android Master

Posted 26 January 2013 - 03:03 AM #384

I think you need a 5-way five combined 2-way switches. To properly switch the tablet between host and peripheral mode.
I did not test this myself, yet. So, no guarantees. But I think the following is more likely to work:

Posted Image


Edit: In a sense, every fixed installation should have this, to allow servicing the tablet with a laptop.

Edited by Timur, 26 January 2013 - 04:24 AM.

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Kookie_Monster

Kookie_Monster

Android Master

  • 593 posts

Posted 26 January 2013 - 03:31 AM #385

In bootloader mode the N7 didnt charge (i guess in recovery too.),
i dont know why but it tooks many restarts (and of-course disable off-mode) till
the N7 started to charging.

Becuase i made fix install i think i have to do some changes:
1) Remove back cover and add cooling.
2) Add parallel battery, the original battery is weak.
3) Solder external buttons.
4) extend the tablet otg female to the accessible location, so if this case will return it will be much easier to fix it,
just disconnect the OTG and connect the original AC charger.

What do you think?

B) Timur, if i deviate the main subject i will open a new thread. (just let me know)


I haven't installed mine yet, but you're talking about cooling. Does it heat up much or is it just a safety measure?

Making the otg reachable makes total sense to me. That's one of the first things I thought when I started to plan the installation. So, yeah, I'd say that's the way to go.

As for the external battery, when you turn on the ignition that's supposed to charge your N7, so unless you're planning on leave it booted for a long time (or your battery is in really bad shape), I don't see why you'd need an external battery. Check out this post by Timur: http://rootzwiki.com...ost__p__1078694



@Timur... regarding the power diagrams on your blog... I read in some post of yours that you actually prefer option 1. But... let's say I was to connect a pendrive, the DAC and the DVB-T. Wouldn't it draw too much power from the N7 and drain the battery?

I'm asking this 'cause I haven't decided yet which way I'm gonna go. I gotta be honest... option 2 seems to make more sense, especially with a self-powered hub with a charging port (2A), like this one:

http://www.ebay.co.u...=item35c3cad18f



@iceman: nice post!!! :D

Edited by Kookie_Monster, 26 January 2013 - 03:48 AM.

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In-Dash Nexus 7 Project | Mod Shop

Samsung Galaxy SIII LTE 16Gb »» ROM: Stock Android 4.1.2 (Root) »» Kernel: Stock
Asus Transformer TF101 16Gb »» ROM: EOS4 Nightlies »»»»»»»»»»» Kernel: KATKernel
Google Nexus 7 32Gb »»»»»»»»»» ROM: Timur's USBROM »»»»»»»»» Kernel: Timur's Kernel

nexus-fan

nexus-fan

Android

  • 141 posts

Posted 26 January 2013 - 04:16 AM #386

Timur, Thanks for your advice, i will try the cables (hope on monday).


Kookie, The cooling just for safety, the temp now (middle of winter!! ) 5-21c (outside), in summer its 29c and as
you know in car the temp much higher.

since i plan to solder the buttons its will be short moding to add cooling, (small raiator and variable fan),
promise to upload some pics.
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OP Timur

Timur

Android Master

Posted 26 January 2013 - 05:12 AM #387

B) Timur, if i deviate the main subject i will open a new thread. (just let me know)


Well, if you want to do minute by minute reporting, a separate thread may be best fit indeed :-)
Somehow I think there may still be painful situations ahead with your project. Please, always be careful with your nice tablet.

Edit:

@Kookie_Monster, slave devices are not drawing any power from N7 in option 1. Rather: N7 + hub are two equal consumers in a parallel setup. The only difference to option 2, afaict, is that N7's power delivery is not limited by what the hub provides to a single slave port.

The main reason USB hubs provide separate power provisioning, is for cases when the host port (say, a tiny netbook) does not deliver enough. But this should not be the case with option 1.

Edited by Timur, 26 January 2013 - 05:48 AM.

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OP Timur

Timur

Android Master

Posted 26 January 2013 - 09:08 AM #388

Something interesting just happened. A guy called Sven Killig (yes, the guy who brought usb host to the original Nexus One in 2010, or was it 2009? http://sven.killig.d...1/2.2/usb_host/) has taken my old, rather unmaintained usb host patch for Galaxy Nexus, made some serious changes to it and, at least it looks like it, got this comitted to CM 10.1. This is the patch: github.com/mehrvarz/android_kernel_samsung_tuna/pull/2.patch
Good guy! And I would never know, if github wasn't sending pull request notifications out per email.

Edit: False alarm, Sven has not submitted this to CM. He just wanted to inform me about the changes he applied. However, if you happen to have a Gnex, I am now more confident to invite you to try out the patch.

Edited by Timur, 26 January 2013 - 10:16 AM.

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iceman_jkh

iceman_jkh

Android Lover

  • 150 posts

Posted 26 January 2013 - 02:35 PM #389

If I understand the FI kernel correctly, it is designed to NOT provide any power (out) from the USB port upon AC/USB power removal (so the N7 battery is saved) AND to place the N7 into a deep sleep state (after a certain time).
-Is this correct?
-How long after power is removed should the N7 take to go into the sleep state?

Edited by iceman_jkh, 26 January 2013 - 02:36 PM.

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Kookie_Monster

Kookie_Monster

Android Master

  • 593 posts

Posted 26 January 2013 - 02:57 PM #390

@Kookie_Monster, slave devices are not drawing any power from N7 in option 1. Rather: N7 + hub are two equal consumers in a parallel setup. The only difference to option 2, afaict, is that N7's power delivery is not limited by what the hub provides to a single slave port.

The main reason USB hubs provide separate power provisioning, is for cases when the host port (say, a tiny netbook) does not deliver enough. But this should not be the case with option 1.


Makes total sense to me now. I hadn't understood the "parallel" part. Suddenly option 1 seems better!! Thanks! :)

Edited by Kookie_Monster, 26 January 2013 - 03:35 PM.

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In-Dash Nexus 7 Project | Mod Shop

Samsung Galaxy SIII LTE 16Gb »» ROM: Stock Android 4.1.2 (Root) »» Kernel: Stock
Asus Transformer TF101 16Gb »» ROM: EOS4 Nightlies »»»»»»»»»»» Kernel: KATKernel
Google Nexus 7 32Gb »»»»»»»»»» ROM: Timur's USBROM »»»»»»»»» Kernel: Timur's Kernel