Registry Entries; Programming The Keypad - Intermec CN30 User Manual

Chapter 3 — Configuring the CN30

Registry Entries

Programming the Keypad

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There are three main "shift plane" registry entries which map the keypad
device scancodes to the windows virtual key values. Each registry entry is an
array of 128 WORDs (2 byte unsigned int, little endian). Since scan codes
generated by the keypad device can range in value from 0x00 to 0x7f, the
driver uses the generated scan code value as an index into one of the shift
plane entries to determine the virtual key value sent up to the system.
The shift plane registry entry used is determined by the current state of the
Orange and Green keys. If the Orange key is held down, then the "Orange
shift plane" array is used. If the Green key is held down, then the "Green
shift plane" array is used. If neither Orange nor Green key is held down,
then the "Normal, unshifted plane" array is used.
The name of the three registry entries that define the Normal, Orange, and
Green shift planes are as follows:
HKLM\HARDWARE\DEVICEMAP\KEYBD\xxxx\Vkey (Normal)
HKLM\HARDWARE\DEVICEMAP\KEYBD\xxxx\VkeyGold (Orange)
HKLM\HARDWARE\DEVICEMAP\KEYBD\xxxx\VkeyAlpha (Green)
Where xxxx is a four-digit keypad ID which identifies the type of keypad
on your CN30 Computer.
These are the registry entries (which are arrays of 128 WORDs) you need
to modify to remap your keypad.
Do the following to change a single key on the CN30 keypad. You can
change more than one key, if desired.
1 Identify your keypad
Read the four bytes of text stored in the registry entry. For this example,
this value is referred to as <KPID>.
HKEY_LOCAL_MACHINE\Drivers\BuiltIn\KEYPAD\ActiveConfig
2 Read the shift plane mapping
Read each of these key values into a WORD array of size 128. Note that
not all keypads have entries for VkeyGold and VkeyAlpha.
HKLM\HARDWARE\DEVICEMAP\KEYBD\<KPID>\Vkey (Normal)
HKLM\HARDWARE\DEVICEMAP\KEYBD\<KPID>\VkeyGold (Orange)
HKLM\HARDWARE\DEVICEMAP\KEYBD\<KPID>\VkeyAlpha (Green)
3 Modify the shift plane mapping
Write the desired virtual key value to the scan code offset of the desired
shift plane.
You can use the scan code diagrams below and on the next page to find
the scan code for the keys you want to remap. Note that scan code 00h is
the left scan trigger, scan code 10h is the right scan trigger, and all values are
hexadecimal.
CN30 Mobile Computer User's Manual