Table of Contents
Advertisement
Serial Data to PC Keyboard Input
When serial information is received on the KE24 RS-232 port, it
may be translated in one of two user selectable manners.
One method allows for receiving ASCII characters on the serial
port. Characters are translated into PC keyboard signals and sent
directly to the computer. Although this method provides a simple
interface, it does not allow for full keyboard functions, or multiple
keystroke commands such as Ctr/Alt, etc.
The second method receives codes from 1 to 127, which each
correspond to a key on the PC keyboard. The KE24 translates these
codes into PC keyboard signals. In addition, each code sent has
a "make" and a "break" value for the key. Reception of a "make"
code on the serial port produces a signal into the computer that
is the equivalent of pressing that key on a keyboard and holding
it down (without repeat). In order to simulate the release of that
key, you must send a "break" code for the same key. Several
"make" codes can be transmitted before their corresponding
"break" codes, which allows for emulation of key sequences such
as Shift+F1, Ctrl+L, etc.
Connecting the KE24 to a PC
8
Advertisement
Table of Contents
