SPDIF TOSLINK over optical cable

Sub forums for various specialist XMOS applications. e.g. USB audio, motor control and robotics.
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Carpentier
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SPDIF TOSLINK over optical cable

Post by Carpentier »

Hello,
I have recently buyed a large quantity of optical receiver and transmitter incorporating in a small component a toslink style plug receptable and the optical component. These components of brand EVERLIGHT (PLT133 and PLR135) works fine with 3V to 5V supply and allow optical communication from 0.1 to 16Mbit/s . The transmitter produce a very bright red light at 650nm frequency. The receiver is selectively sensitive to this red light. The cable is a simple toslink cable for audio equipment.
All these components can be powered identically with 3V or 5V and simply connected to a digital IO for controlling emission / receiving signal.
The Toslink fiber optic cable with standard plug are very cheap also.
Maybe someone would be interested for developping an application for these fiber optic communication modules that could be either:
- low level firmware for receiving SPDIF audio .(or generating SPDIF audio)
- or a protocol stack for optical digital information interchange over these cables.
It is important to know that the link protocol must have transitions at a minimum rate of 0.1Mbit/s as the receiver component seems to not working simply on DC.

I am personally interested in data communication using these optic modules, but developping a protocol and the low level firmware is not a simple task.


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franksanderdo
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Post by franksanderdo »

Hi Carpentier,

may I have some additional information about the modules?
I have done some thing similar on transputer and I would love to do such a project to learn more on XCore ;-)

Regards
Frank
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Folknology
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Post by Folknology »

Bianco did some work that made be relevant to this thread : Xmos Link over optical
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Bianco
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Post by Bianco »

I have considered toslink for the project but didn't liked the fact that most of the toslink transceivers can't handle DC. There are some, but they were either very expensive or not easily available. I've only looked at hardware from Toshiba though.
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