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CC2541_keyfob无法经由CC Debugger烧录

Other Parts Discussed in Thread: CC2541

问题发生经过:
原本拿到CC2541_keyfob与CC Debugger版子时
可以使用IAR烧录sample code并成功运行

但经过几次烧录后,出现location error
然后我使用SmartRF Flash Programmer烧录TI提供的HEX重置CC2541_keyfob
之后出现无法与CC Debugger连接(CC Debugger上显示绿灯,驱动也正常装置管理员也抓得到CC Debugger跟CC2541_keyfob)

问题:
可以经由SmartRF Flash Programmer烧录HEX档进去CC Debugger
但无法烧录HEX档进去CC2541_keyfob
IAR也无法烧录sample code进CC2541_keyfob里
SmartRF Flash Programmer错误讯息:CC2541 - ID8662: Communication error with CC Debugger

PS:网上很多人都遇过没电,但我Battery测过电压2.7V

感谢