As title,
Found in practical application, the use of USB device, a USB device port number has changed, to use the scene is continuously will have a new USB device inserted, so doubt whether because of the limitation of system for USB device port number is 127, so lead to the redistribution port number? How to avoid this problem?

CodePudding user response:

USB to reset the enumeration or inserted into the mouth may lead to different device path changes, the application of general equipment are enumerated, and then match the VID and PID, and use the enumeration return path to the open the equipment reference according to VID PID for USB device path

CodePudding user response:

reference 1st floor zgl7903 response:

USB to reset the enumeration or inserted into the mouth may lead to different device path changes, the application of general equipment are enumerated, and then match the VID and PID, and use the enumeration return path to the open the equipment reference according to VID PID for USB device path

Use of VIP and PID will get from a fixed device path? Is the correct position of the PORT, the question now is the display device has a fixed PORT location of the light, but use the registry to obtain position error will always happen

CodePudding user response:

Learn to call devcon?

CodePudding user response:

refer to the second floor w562091987 response:

Quote: refer to 1st floor zgl7903 response:

USB to reset the enumeration or inserted into the mouth may lead to different device path changes, the application of general equipment are enumerated, and then match the VID and PID, and use the enumeration return path to the open the equipment reference according to VID PID for USB device path

Use of VIP and PID will get from a fixed device path? Is the correct position of the PORT, the question now is the display device has a fixed PORT location of the light, but use the registry to obtain will always appear position error

Are generally use vid and pid to open the usb device, is there any other good idea?

CodePudding user response:

The

quoted zhao teacher reply: 3/f

learn to call devcon?

Devcon under the great god to detailed said

CodePudding user response:

Baidu search "devcon"