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Stm32f405 USB module not responding

2022-02-03 02:36:17 CSDN Q & A

The specific problems are as follows :

In my project , Enabled USB And several serial ports .
Before calling the serial port ,USB It can respond normally and generate files .
But as long as the serial port is called ,USB You can't respond normally .

The call of serial port is controlled by timer , Keep sending and receiving .

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