使用java将字节从PC发送到USB通信端口

Question

Can I send a byte from PC to usb communication port via java program? if yes .Is there any sample code that can help in this issue??

I'm looking for sample codes or good tutorials

Answer 1

If you are using a USB-to-serial converter (which is what it sounds like) then the OS driver software presents a serial interface to applications.

I think what you need to look at is the JavaComms API - http://www.oracle.com/technetwork/java/index-jsp-141752.html .

Does this page help at all - http://alumni.media.mit.edu/~benres/simpleserial/ ?

Answer 2

When using a USB-Serial adapter the USB part can (usually) be ignored and instead you should just focus on the serial part. The USB adapter drivers will give you a virtual serial port to use as any other serial port.

For using a serial port with Java see Java Communications API or Serialio

Answer 3

You have not specified what kind of USB communication you want, so this is going to be a bit generic.

If your device identifies itself as a USB CDC you system probably already loads a driver and enables you to access it as a serial port. Similar is true if the dice identifies itself as a HID (Human Interaction Device) keyboard, mouse etc.

If you have your own type of device, then you can use javax.usb from linux (might be a port for windows). You need to identify your device from the vendor/device id, possibly configure your endpoints, device if you want control, bulk or isochronous data, create the packet, populate it with your byte(s) and then transfer it. Javax.usb has some example code.

For simplicity I'd recommend your device to be a CDC (code available, check google) and it will identify itself as a serial port and you do not need to handle any of the complexity of USB when communicating.