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time-sync is a utility to sync the time with any Rockbox target that runs the
software USB stack.

It was originally take from libgpod and stripped of unnecessary code.

http://gtkpod.git.sourceforge.net/git/gitweb.cgi?p=gtkpod/libgpod

To compile and install, just run:
    make
    make install

Example run:
    mcuelenaere@wim2160:~/rockbox/utils/time-sync$ sudo time-sync /dev/sdb1
	Data Payload: 07 da 00 14 04 0c 30 2b 00 00 00 00
	Write buffer cmd: 3b 01 00 0c 00 00 00 00 0c 00
    Time was synced!

Example udev rule (for Onda VX747):
    # automatically adjust my Rockboxed DAP RTC
    ACTION=="add", ATTRS{idVendor}=="07c4", ATTRS{idProduct}=="a4a5", KERNEL=="sd?", NAME="%k", RUN+="/usr/local/bin/time-sync /dev/%k"