用keil uvision4开发环境，编译正常，点击download时，出现
Could not initialize target device!Please power cycle the board and try again.
然后再出现Error: Flash Download failed - Target DLL has been cancelled.
请问这是什么问题？是配置出错了吗？
我的配置如图：
用keil uvision4开发环境，编译正常，点击download时，出现
Could not initialize target device!Please power cycle the board and try again.
然后再出现Error: Flash Download failed - Target DLL has been cancelled.
请问这是什么问题？是配置出错了吗？
我的配置如图：
