我执行会出错:
PS C:\Program Files (x86)\CSR\BlueSuite 2.6.8> .\dfukeygenerate -v -o my_stack_key -r /dev/random
DfuKeyGenerate, version 2.6.8.1467 Release
Copyright (c) 2001-2017 Qualcomm Technologies International, Ltd.
All Rights Reserved.
Qualcomm Technologies International, Ltd. Confidential and Proprietary.
outputbasename = my_stack_key
Couldn't open /dev/random, or it contains no data.
Errors encountered. Ending without attempting key generation.
Key generation failed.