Intermec CN2B Manual de usuario descargar pdf (Pagina 203)

Chapter 7 — Programming

CN2B Mobile Computer User’s Manual 185

aware of when looking at the registry. Knowing this, we can see that the

value that the keypad driver will pass to the system is a hex 34. Looking that

up on an UNICODE character chart, we see that it maps to a “4”. If you

wanted the key, labeled “4”, to output the letter “A” instead, you would

need to change the seventh word to “41” (the hexadecimal representation

of “A” from the UNICODE chart), then put the key back into the registry.

Note: Do not remap scan codes 0x01, 0x41, 0x42, 0x43, or 0x44, or the

CN2B Computer becomes unit unusuable until a cold-boot is performed.

If you wish to disable a certain key, remap its scan code to 0x00.

Change Notification

Just changing the registry keys do not immediately change the key map-

pings. Signal the “ITC_KEYBOARD_CHANGE” named event using the

CreateEvent() API to notify the keypad driver the registry was updated.

Advanced Keypad Remapping

It is also possible to map multiple key presses to one button and to map

named system events to a button. The multiple key press option could be

useful to cut down on the number of keys needed to press in a given situa-

tion or to remap which key behaves like the action key. Mapping events to

a button could be useful to change which buttons will fire the scanner, con-

trol volume, and allow for suspending and resuming the device. If you need

help performing one of these advanced topics please contact Intermec

Technical Support.

Scan Codes

At the lowest driver level, the CN2B keypad identifies keys as scan codes.

These scan codes are sent via the keypad microcontroller, and cannot be

changed without modifying the keypad firmware.

Keypad Scan Codes and Registry Entries

Press this Key Meaning Scan Code Registry Entry

Reserved 0x00

[I/O] I/O button 0x01

Scanner Handle Trigger 0x100 #define VK_SCAN3

Scanner Left 0x03 Fkeycode9

Scanner Right 0x05 Fkeycode10

[4] 4/GHI/A2 0x06 Fkeycode17

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Intermec CN2B Manual de usuario Pagina 203