Joystick 2

[Omar]

The JoySticks are assign USB number based on the serial number of each USB Joystick. Windows remembers which actual phyical joystick was assigned which USB# based on the serial number of the joystick.

So when you drag the joysticks around in the Diagnostics tab you are tell the system that you want the joystick with serial number XXXXXXXX to be USB1 and the joystick with serial number YYYYYYY to be USB2. So when in the Begin.VI you know which phyical joystick you are opening

You do not need to know the serial number the Diagnostics tab takes care of that.

[Greg McKaskle]

USB joysticks can have serial numbers, but due to cost issues, they rarely do. Instead, the vendor and product info identifies them, with the order they are identified on the bus being the id for identical joysticks.

This doesn't really affect what you are saying except that there are corner cases which will not work as you might expect -- for example, unplug the hub, swap two identical joysticks within the hub, replug the hub, and the computer can't tell that anything changed. If they had serial numbers, the joystick values would follow the serial numbers. Without serial numbers, they are tied to the port.

Greg McKaskle

[Omar]

I wish my test rack that has 24 USB power supplies worked that way.
Based on the USB port instead of the serial number.

Every time the CAL shop calibrates the supplies and does not put them back a the correct spot it screws up the addressing.