IEEE-1394 Embedded System Software Stack

IEEE-1394 is a high performance Serial Bus standard. The IEEE standards committee started the effort of defining this standard in 1986. One of the important goals of the committee was to come up with a standard for high speed, low cost Serial Bus suitable for use as a peripheral bus. The serial bus enables high-speed transmissions (100 Mbps to 400 Mbps) over a low cost bus. The Serial Bus standard also provides hot-pluggability.

Other committees have defined protocols on top of the IEEE-1394 specifications. The SBP-2 protocol provides mechanisms for the delivery of commands, data and status independent of the command set or device class of the peripheral. Printer and disk drive manufacturers have adopted this generic framework.

The IP over 1394 protocol enables standard TCP/IP protocols to be used on top of the 1394 specifications. The 1394 bus provides much higher bandwidth than possible with 10baseT LAN.

The Digital Camera protocol enables digital cameras to be connected with the IEEE1394 cable. Sony is one of the early adopters of the specification for their DS-250 model camera.

Other emerging protocols are the AV/C Digital command specifications for sending control commands over the bus and the IEC61883 specifications for transport of digitally encoded audio/video data. Digital equipment manufacturers are embracing these standards for the new devices being designed. Another protocol for making 1394 A/V devices interoperable is the HAVi protocol being proposed by industry giants in A/V equipment like Sony, Philips, Grundig, etc.

DPP or Direct Print Protocol is a protocol which is targetted towards direct printing between A/V source devices like camcorders and target devices like printers.

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