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@@ -0,0 +1,35 @@
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+USB to USB keyboard protocol converter
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+======================================
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+
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+Hardware requirement
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+--------------------
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+Arduino Leonardo
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+ http://arduino.cc/en/Main/ArduinoBoardLeonardo
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+
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+Circuit@Home USB Host Sheild 2.0
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+ http://www.circuitsathome.com/products-page/arduino-shields/usb-host-shield-2-0-for-arduino
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+
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+
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+Build firmware
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+--------------
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+ $ git clone git://github.com/tmk/tmk_keyboard.git
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+ $ cd tmk_keyboard
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+ $ git checkout usb_hid
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+ $ git submodule init
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+ $ git submodule update
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+
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+and download LUFA and unzip under protocol/lufa and edit LUFA_PATH in protocol/lufa.mk. Then,
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+
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+ $ cd converter/usb_usb
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+ $ make
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+
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+You will get usb_usb.hex if you are lucky.
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+Program your Leonardo with avrdude(or easy-going Arduino IDE):
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+
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+ $ avrdude -patmega32u4 -cavr109 -PCOM17 -b57600 -Uflash:w:usb_usb.hex
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+
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+
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+Limitation
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+----------
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+Only supports 'HID Boot protocol'.
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+Not support keyboard LED yet.
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tmk