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USB

hi,各位朋友,

    大家好,我现在使用rm48 的hdk调试 usb device ,用的是 processors.wiki.ti.com/.../HALCoGen_USB_Device_-_driver_&_CDC_Class 的程序,  在pc上驱动也安装正确, (com14就是),但是用串口调试助手打不开 ,这是什么原因?  或是怎样操作与hdk的通信?