Please can I get help to get developers options on so that I can get the USB debugging code to use on my android gamepad for gaming using a Samsung galaxy a53
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I really want usb host capabilities on my phone.
Honeycomb 3.1 has this as does (if I understand correctly) Samsung Galaxy S2, where it is backported to gingerbread.
So first thing to do of course was to look at the galaxy s2 source code.
But there is nothing there. No UsbDevice.java, no additional drivers, nothing.
Do I miss anything? Isn't Samsung required by GPL to publish such modifications?
Thanks,
quietNaN
So far USB host mode doesn't work for Androids < 3.1
For 2.3.4 there's only an external library to support the USB accessory mode but it needs to be built into the OS. From latest news this is included in CyanogenMod 7.1 so as soon as this is released for your phone you can at least connect peripherals to S2.
See also this link for more details on Android USB support:
http://developer.android.com/guide/topics/usb/index.html
Thanks ramdroid77 for your answer.
I am aware that the feature I am asking for is not available before 3.1 .
And I am also aware of the "accessory mode".
However, there are two reasons why I am pretty sure that the S2 does not use the accessory mode.
1. From what I gathered around the internet (mostly from the exact link you mentioned) the handshake in accessory mode is quite different from the usual usb host mode. An android phone in accessory mode will for example not be able to provide an identifier for the client. The accessory is supposed to do this.
So (please correct me here, this point is halfway guessed) I think it will not be possible to plug an usb device into your phone and expect things to work. An "usb accessory" is something you actually have to develop to work with android. There are videos on youtube however that show people just plugging in a stick into their S2...
2. Usb accesory mode is introduced as an optional feature in 2.3.4 . The S2 runs 2.3.3 .
The README_platform.txt provided with the S2 source gives instructions how to build the code. It says to download 2.3.3(r1) and replace some files by the files provided by Samsung before make. The usb handling is not part of 2.3.3(r1) and (as far as I can see) not part of the modified files they offer for download.
The modifications were actually what I was looking for. I was hoping that Samsung backported the true usb host mode which is introduced with 3.1 (but not published yet by google) to 2.3.3 so that I can have a look and also backport it to the pre-CM7.1 (build from source) I am using on my legend. Well, at least try to figure out which informations I need to gather before I even can start to think about backporting it.
Since the S2 does not use accessory mode (I think) they either use a host mode and hold the code out on us (since my original question) or they use something completely different (neither the android accessory mode nor the android usb host mode) which then I must have missed in the kernel code. If I remember correctly the tiamat kernel for example has support for usb mass storage devices (which I cannot test on my legend).
I have some projects on my mind which (from what I gathered about the accessory mode) requires a real host mode.
So my question persists (or has to be reformulated): What does the S2 use to communicate with a usb device?
quietNaN
Below is the link for i9003 schematics and troubleshooting guide! hope this is helpfull in adding usb otg and tv out feature to i9003.
4shared.com/file/YzPnzZtQ/Samsung_i9003_Schematics__Trou.html
I have searched the pdf but could not find anything related to tv out....only thing I found was on page 11, in u301 ic there was a reference video...and it seems to be not connected
In omap application processor there is supposed to be tvout1 and tvout2 which I cant find in the schematics.
I think this will be much more usefull for otg project...now we will get clue as to which port needs to be activated to get power!
Thanx buddy...i love usb otg feature. But right now CM7 project is more important to all of us. Once we succeed in stable cm7 then we can think about this.
After searching and not finding what I was looking for, I always go to XDA. What android phones from Verizon have usb hosting capabilities. Specifically I want to connect and external hard drive to transfer files. I know you're probably wondering why I just don't use a computer, well my 4 year old son made my computer unusable. Thanks in advance for any help.
Sent from my DINC2
Just look at the market
Search: "usb host"
First result is okay
The problem is:
- Your hardware need to support it
- You need to be root.
But you can try!
---------------------------------
Fernando Setien
I've tried the usb host controllers app, but that was a no go. I have an incredible 2 that is rooted. I should have included this in my first post, but I failed to.
Sent from my DINC2
Also the kernel needs to support it and no stock kernel does that I know of.
Supposedly, Android 3.1 and newer support USB host mode. In some cases you'll need special adapters and/or a powered USB hub. Unfortunately, I'm too new of a user to post outside links (the forum won't let me), but there's much documentation on the Android developer site regarding host mode v. accessory mode, and at least one article/forum thread showing an Android 3.1 tablet with an Android 2.2 phone plugged into it, the tablet reading the phone's logs over the USB connection.
In other words, it's possible, but hardware limitations may make it difficult, as will whatever version of Android you're using.
YellowApple said:
Supposedly, Android 3.1 and newer support USB host mode. In some cases you'll need special adapters and/or a powered USB hub. Unfortunately, I'm too new of a user to post outside links (the forum won't let me), but there's much documentation on the Android developer site regarding host mode v. accessory mode, and at least one article/forum thread showing an Android 3.1 tablet with an Android 2.2 phone plugged into it, the tablet reading the phone's logs over the USB connection.
In other words, it's possible, but hardware limitations may make it difficult, as will whatever version of Android you're using.
Click to expand...
Click to collapse
I am running a ICS and it is not enabled by default. It maybe on Tablets but not mobile phones. A search will lead you to threads about it asking for it to be add to the kernel but you remove options when you do and there has not been alot of want for it.
Native support
At least Samsung Galaxy SII and Note does usb Host with the default ROM. You can see with cable you need (witch could be an issue too) on many blogs.
Hi,
Android Dev Noob and just looking at the SDK I have this question which probably someone will be able to tell be straight away.
I want to relay USB Host port data to a USB accessory port.
I am looking at the USB Host APIs >= Andriod 3.1
What I want to do is be able to relay the keyboard, mouse and touchscreen that I have connected on the host port and relay that to the OTG.
So here is my noob questions before I waste loads of time.
1... Is it possible to create device manifests on the fly.
I was thinking I could just make devices connected on the host appear as if they are on the accessory port.
If not then I guess I could create some default manifests and pick the most relevant.
2... This is hardware related but many tablets and android boxes have separate usb host & otg ports?
It is possible to have a host and accessory going at the same time.
This might makes things a little easier as the rationale is that I have a windows 8 machine and an RK3288 android box and I want to share the keyboard, mouse and touchscreen.
Video is easy as I can just swap the input between pc & hdmi.
I was thinking if I plugged all my devices into android I could just have a hot Key to redirect to windows 8 or don't capture and use devices on android.
I thought it might be a much simpler way without network needs and have read there are gesture problems with KVM products such as Synergy.
What do you think is it possible, does anyone know if this has already been done and there is an app?
Also if you have any better ideas or some pointers where to start all will be welcome.
Many Thanks
Stuart
hello,
i bought the easycap viewer android application,
and installed it on my devices
The easycap viewer needs an easycap frame grabber , connected via usb to the device and connected to a camera (via bnc or s-video or rca connector)
the devices i have are these:
- Acer iconia tab a500 (tegra 2 , android 4.03)
- Created N7 (china phablet, mt6592, android 4.4.2)
- Xiaomi m2s (qualcomm snapdragon, miui v5)
The application does work flawlessly with the Xiaomi m2s,
instead:
on the Acer, when i start the app, the screen become black, and the app is not responding
on the Created N7,, the appl starts , but when i connect the camera, i cannot see the video coming from the camera
I dont understand why on these devices the app does not work,
and need help to understand what is the cause of the problem.
The app includes an option to send log report to the developer
(autodroid), i sent it, but autodroid told me to try with a powered hub, but this did not help...now they are working on other project, so they told me they cannot help
Could you please help me to find the cause of the problems?
By the way, on the Acer i cannot send the report, because the appl is not responding:
so i enabled the logcat, and i was able to see in it that the appl is hanging when it tries to load the streaming library...
Could yoy help me?
I can send you all the data you need to debug the appl..
or, if not possible to fix it, could you suggest me an alternative frame grabber application/usb dongle that can work with my devices?
Thank you!!
Lodovico
Hi,
Thanks for using XDA Assist Not all apps are universally compatible So apps support only certain set of devices whose Specifications match with application and hence for your devices its not supporting
Thank you
I know that sometime, with some simple fix to an application, it can work for a broader range of devices...
Or, sometimes, the issue can be solved with an upgrade to the os of the device ... (for example, i could try to upgrade my Acer A500 to the 4.4 Omnirom and see what happens...)
Perhaps the developer has stopped working on this application, but with some simple fix it could work also with my devices
Are you sure that this is not the case?
By the way, i faced a problem like this with an other application, the IrDroid, (available for free on the Play Store)
It didn't work with my Sony tv, but then i was able to find the sources (it was open source), debug them ( i installed the SDK on my pc), do a simple fix, compile them, and get an IrDroid app that now works also with my Sony tv , flawlessly...
The easycap is not open source, but i found some russian language forums, where there is an active thread about the easycap application,and applications like it (example... carcam) ...perhaps there some program sources are available...
Any suggestion?
Thanks!
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