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IWR6843AOPEVM: 单板运行呼吸心跳检测demo时,上位机显示无法连接串口

Part Number: IWR6843AOPEVM
Other Parts Discussed in Thread: MMWAVEICBOOST, IWR6843AOP

没有使用MMWAVEICBOOST,只用iwr6843AOP烧写呼吸心跳demo(目录:mmwave_industrial_toolbox_4_8_0\labs\vital_signs\68xx_vital_signs),发现无法连接到设备,查看pc端的设备管理器,是有两个cp2015对应的com口的,请问这是什么原因导致连接不上的?