I am testing with the ASF USB CDC sample project for my Xmega128a4. There is an atmel supplied driver.
When I install the driver on my main Win7 machine, it uses COM10, even though there is already a COM10 port. I uninstalled and reinstalled this driver while I was using COM10, but it still installed it as COM10.
When I installed it on another Win7 installation, it installed on COM15 which was good because I don't have another COM15. I wish it would use COM15 on my main Win7 installation.
What is going on? How does it decide what COM port to use?
I suppose I can change my existing COM10 to use another COM port, but I shouldn't have to do that.