usb2.0怎么由高速模式改变到全速模式,具体是怎么实现的?能够通过代码实现速度模式的切换吗?
This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
插入1.1的设备就会自动转成FULL SPEED模式,由USB协议决定的