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# $Id: README_USB-VID-PID.txt 467 2013-01-02 19:49:05Z mueller $
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!! Read this disclaimer carefully. You'll be responsible for any !!
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!! misuse of the defaults provided with the project sources. !!
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USB drivers identify hardware by means of two 16 bit identifiers
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VID - Vendor ID
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PID - Product ID
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In a 'softcoded' USB Controler like the Cypress FX2 each firmware with a
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specific functionality should have a unique VID/PID so that drivers can
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automatically detect and configure.
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The assignment of USB VID/PID is done by usb.org. Unfortunately there is no
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VID range reserved for 'development' or 'internal use', the only official way
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to obtain a VID is to buy one from usb.org, see
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http://www.usb.org/developers/vendor/
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The 'usb_jtag' project bought many years ago a small PID range from a re-seller
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and used
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VID=16C0
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PID=06AD
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for a project which implemented an Altera UsbBlaster compatible JTAG interface.
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The firmware provided with this project provides
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- a JTAG interface (via EP1 and EP2)
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- data channels (via EP4, EP6 and optionally EP8)
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The JTAG part is compatible with the 'usb_jtag' implementation and by extension
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compatible with the 'usbblaster' cable driver provided by 'UrJtag', and can
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therefore be operated with the 'jtag' command.
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However, because the firmware offers additional functionality it should have a
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separate VID/PID. Unfortunately it is not longer possible to buy at very modest
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cost a PID sub-range, as was done by the 'usb_jtag' project bought many years
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ago.
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VOTI, a small dutch company, has bought a VID for it's own developments and
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made a small range of PID publicly available as "free for internal lab use".
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Usage is granted for 'internal lab use only' by VOTI under the conditions:
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- the gadgets in which you use those PIDs do not leave your desk
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- you won't complain to VOTI if you get in trouble with duplicate PIDs
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(for instance because someone else did not follow the previous rule).
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- See http://www.voti.nl/pids/pidfaq.html for further details.
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The retro11 project uses one of these 'free for internal lab use' PIDs
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VID=16C0
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PID=03EF
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from VOTI as default VID/PID.
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==> This is is perfectly fine for plain hobbyist usage
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==> But respect the ownership of VOTI of this VID/PID and do not
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use this VID/PID for other purposes
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