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USB Interfaces User’s Guide
Keyboard Emulation
Scan one of the bar codes below to program the imager for your keyboard interface. Keyboard Emulation does not require a
custom driver installation. However, a HID interface on Windows 98 does. See page 1-2 for further information.
Note: You must select the correct country code (default is U.S.A.). See the Country Codes section in your imager’s User’s Guide
for further information.
Once the appropriate keyboard interface bar code is scanned, no further interface programming is required. However, if you
wish to program other parameters for your imager, please refer to your User’s Guide.
PC Keyboard Layout
This is the same layout used by the legacy ENHANCED PC keyboard (sometimes called AT keyboard). Some keyboard style
settings of our ENHANCED PC keyboard wedge interface (Terminal ID = 03) are not required by the USB keyboard because we
know the state of the Caps Lock all the time. The device therefore ignores these styles.
International support is the same as those found with the ENHANCED PC keyboard interface (more than 70 countries).
Apple MacIntosh Keyboard Layout
This is the same layout as used by the Apple ADB keyboards. International support is the same as those found with the Apple
ADB keyboard (13 countries).
Composite Device
Keyboard emulation is implemented as part of a composite device. The other part is the HID POS interface (see
HID POS
Interface
beginning on page 1-11). The device complies with the "Composite Device" model of USB, so the operating system
generates two logical devices:
•
HID keyboard
•
HID bar code reader (HID POS)
Two different interfaces for one device offers more features than a single keyboard emulation. If you don't need the additional
features of HID POS, just ignore that interface. All output leaves the device via the keyboard interface by default. HID POS
allows application programs to control the trigger and disable bar code reading. HID POS is the only way to implement such a
communication under Windows 2000 and Windows XP. These operating systems open all keyboards for exclusive access.
See
Trigger the Device
on page 1-12 for further information.
HID Driver for Windows 98
Windows 98 asks for a driver when the device is first plugged in. All HID interfaces use the standard driver that comes with the
operating system. Accept all default values to install the driver.
Sometimes Windows will start the installation again after you have clicked
Finish
. Some Hand Held Products interfaces are for
composite devices. Windows installs a separate HID driver for both parts of a composite device, as well as a virtual hub driver.
Because of this, Windows may run through the installation several times.
HID Driver for Windows 2000 and Windows XP
In Windows 2000 and Windows XP, the installation occurs in the background.
COM Port Emulation
The COM Port interface emulates a regular serial RS-232 COM port. The device is implemented according to the USB CDC
ACM (Communication Device Class Abstract Control Model) specification. (See
Universal Serial Bus Class Definitions for
Communication Devices at
www.usb.org/developers/devclass_docs/usbcdc11.pdf
for further information.) This specification is
written for modems, but also supports regular serial ports.
