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cc2640r2 flash programmer2烧录问题



 flash programmer2烧录cc2640r2,出现以下情况:

Create XBAL object failed: Debug interface is locked.

>XBAL EB pointer is null.

>Failed to create device object.

强制擦除可以,单Erase失败,设备连接也是失败,这是什么原因。CC2640r2之前是好的,突然变这样了