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help in usb data communication program

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hosnie

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usb communication program

hi,
i have a program for connecting atmega8 with usb, and send data from avr to PC.
but when i build is the error "undefined reference to `usbCrc16'"
this variable is in "usbdrv.c"
it has been declared in "usbdrv.h" with this code " extern unsigned usbCrc16(uchar *data, uchar len);" but i can't find it's definition.
i am beginner, could someone help me please?
i use atmega8
i have attached source codes.
 

arthur0

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how to usb data comunication

Hi,
You're missing a file (attached below).

Alternatively, you might want to [re-]download the latest version of the project >here<.

Arthur
 

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