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我使用官网的USB-Dongle原理图制作的板子,焊接好后,烧录USB-Dongle固件的问题

Other Parts Discussed in Thread: CC2540, CC2541

固件烧录后,电脑显示未知设备,我这个未知设备是下面照片的通用串行总线控制器,和别人不一样,芯片是CC2540的

点击更行驱动也显示已是最新驱动,不需要安装驱动。。。没有别人插上显示未知设备的栏目