Genovation MiniTerm 905, Руководство пользователя

Страница: 59 / 68

Genovation, Inc. 59 MiniTermPro
Appendix E: USB CDC Virtual COM Host Mode
USB CDC support is available in MiniTerms v5.60 and higher. Contact
Genovation for a firmware upgrade file if you need one.
The USB CDC ACM (Communication Device Class, Abstract Control Model)
allows a USB connected device to communicate with a host PC (Windows, Mac
or Linux) using standard class drivers supplied with the PC. The MiniTerm
appears as a legacy COM port device to software applications running on those
OS’s.
It’s very similar to the standard Genovation MiniTermPro virtual COM port
method, but with some differences:
o
The USB CDC class driver is available and built-in on most PC OS’s
(Windows, Linux, Apple).
o
The MiniTermPro software only runs on a Windows PC.
o
The Windows CDC driver ties the COM port number to the serial number
of the keypad. The serial number is set using MacroMaster.
o
The MiniTermPro software ties the COM port number to the USB jack on
the PC.
o
The CDC COM port will lose its “handle” if the keypad is unplugged while
in use. If the keypad is re-plugged, the application will have to close and
reopen the port.
o
The MiniTermPro COM port allows for unplugging and re-plugging of the
keypad while the application has the COM port open.
o
Every time a new CDC keypad (new serial number) is introduced to a
Windows PC, the OS will install the driver (INF) again.
o
MiniTermPro handles all Genovation virtual COM keypads in a driverless
manner.
o
CDC keypad COM ports are set using Device Manager.
o
MiniTermPro COM ports are set using the MiniTermPro “Configure” panel.