error messages -----------------------------------------------
Copyright 2010-2016 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to http://sourceforge.net/p/dfu-util/tickets/
Deducing device DFU version from functional descriptor length
Invalid DFU suffix signature
A valid DFU suffix will be required in a future dfu-util release!!!
Cannot open DFU device 0483:df11
No DFU capable USB device available
부트로더 굽는중 에러발생
C:\Users\gun\AppData\Local\Arduino15\packages\OpenCR\tools\opencr_gcc\5.4.0-2016q2/bin/arm-none-eabi-ar: unable to rename 'core\core.a'; reason: File exists
arduino 1.8.1
error messages ----------------------------------------------- Copyright 2010-2016 Tormod Volden and Stefan Schmidt This program is Free Software and has ABSOLUTELY NO WARRANTY Please report bugs to http://sourceforge.net/p/dfu-util/tickets/
Deducing device DFU version from functional descriptor length Invalid DFU suffix signature A valid DFU suffix will be required in a future dfu-util release!!! Cannot open DFU device 0483:df11 No DFU capable USB device available 부트로더 굽는중 에러발생 C:\Users\gun\AppData\Local\Arduino15\packages\OpenCR\tools\opencr_gcc\5.4.0-2016q2/bin/arm-none-eabi-ar: unable to rename 'core\core.a'; reason: File exists
exit status 1 보드 OpenCR Board 컴파일 에러.