Bluetooth support for 2011 3D glasses

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erdem_ua
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Re: Bluetooth support for 2011 3D glasses

Post by erdem_ua » Thu Feb 16, 2012 12:35 am

I don't have such experience on sniffing BT (but WEP for cracking :D).

My help might be just giving detail of $100 bounty.
1. We needed to run this glass with cheap USB BT4.0 dongles, from PC.
2. You needed to give/open source of the stack or any information with project.
3. Control of shutter speed / sync (if protocol permits.)
4. Hack needed to be released under our forum first.
5. Bounty will transferred using PayPal from project donations, if it doesn't enough balance, will make donate the remaining to project :)

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erdem_ua
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Re: Bluetooth support for 2011 3D glasses

Post by erdem_ua » Thu Feb 16, 2012 10:32 pm

I believe it already support channel hopping or it's useless to use it for almost all BT devices.

Onix
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Re: Bluetooth support for 2011 3D glasses

Post by Onix » Wed Jul 11, 2012 10:17 pm

I registered here just for this topic.

I bought 8 pcs pack of these glasses (not working condition) on ebay with hope to use them on PC
Unfortunately they they are not really Bluetooth


here is quote from Broadcom datasheet:

Code: Select all

Shutter Control for 3D Glasses
The BCM20730, combined with the BCM20702, provides full system support for 3D glasses on televisions. The 
BCM20702 gets frame synchronization signals from the TV, converts them into proprietary timing control 
messages, then passes these messages to the BCM20730. The BCM20730 uses these messages to synchronize 
the shutter control for the 3D glasses with the television frames.
The BCM20730 can provide up to four synchronized control signals for left and right eye shutter control. These 
four lines can output pulses with microsecond resolution for on and off timing. The total cycle time can be set 
for any period up to 65535 msec. The pulses are synchronized to each other for left and right eye shutters.
The BCM20730 seamlessly adjusts the timing of the control signals based on control messages from the 
BCM20702, ensuring that the 3D glasses remain synchronized to the TV display frame.
3D hardware control on the BCM20730 works independently of the rest of the system. The BCM20730 
negotiates sniff with the BCM20702 and, except for sniff resynchronization periods, most of the BCM20730 
circuitry remains in a low power state while the 3D glasses subsystem continues to provide shutter timing and 
control pulses. This significantly reduces total system power consumption.
so it is not possible to use common bluetooth dongle to controll them

only way to use my purchase them is to throw away controller and replace it with some simple schematic which uses IR

chirkoot1
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Re: Bluetooth support for 2011 3D glasses

Post by chirkoot1 » Sun Aug 19, 2012 8:50 pm

So is that mean no possibilities on this?

Onix
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Re: Bluetooth support for 2011 3D glasses

Post by Onix » Mon Aug 20, 2012 12:02 am

I think there are no possibilities to control these glasses with simple Bluetooth dongle.

But ,I think, it is possible that in the future it will be possible to buy special Bluetooth dongles to control 3d glasses, since that protocol may be adopted as new standard.

chirkoot1
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Re: Bluetooth support for 2011 3D glasses

Post by chirkoot1 » Tue Nov 20, 2012 3:22 am

Any looking into this or any update?

mhelin
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Re: Bluetooth support for 2011 3D glasses

Post by mhelin » Tue Nov 27, 2012 10:26 pm

These new 3D glasses use Bluetooth 4.0 Low Energy (BLE) mode, see http://en.wikipedia.org/wiki/Bluetooth_ ... al_details

Windows 8 is supposed to have native BT 4.0 support.

Here you go:

http://www.faqs.org/patents/app/20110122238
Last edited by mhelin on Wed Nov 28, 2012 8:51 pm, edited 1 time in total.

Onix
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Re: Bluetooth support for 2011 3D glasses

Post by Onix » Tue Nov 27, 2012 11:06 pm

it is not that simple, because this chip uses separate hardware lines to control transmitter with precise timing.
I am not sure if it is even possible to control it over usb.

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