3

EA KIT129-6

A keyboard (anything from individual keys to a 3x5 matrix keyboard, J4)

can be connected at the plug-in connection. The connected keys are

debounced by means of software. Please note that it is only possible to

connect an external keyboard to versions without an integrated touch

panel.

Each key is switched between an output and an input. Each input has a

100k

Ω pullup. Up to 5 keys can be connected at each output.

To find out double-key-strokes all outputs must be decoupled by a

Schottky-Diode (e.g. BAT 46).

Transmitting the keystrokes

At each keystroke, the associated key number (1..15) is transmitted or an

internal Touch Makro (only if defined) will be started. The release of the key

is not transmitted. If the release of the key is to be transmitted as well, this

can be done by defining touch macro no. 0. The automatic keyboard scan

can be deactivated by means of the command "ESC T A 0". If the

handshake line (e.g. CTS) does not permit transmission, keystrokes can

be lost.

The key number can be determined as follows:

Key number = (output -1) * 5 +input

(output: a number between 1 and 3; input: a number between 1 and 5).

Versions EA KIT129-6LWTP and KIT129J-6LWTP are supplied with an integrated touch panel with 15

fields. The graphics kit offers convenient commands supporting this touch panel. It is possible, for

example, to group a number of touch fields to form a single large key and then draw and label the key.

You can also assign a record code (1..255) to the key you have defined. If a return code of 0 is assigned,

the key is disabled and has no effect when it is pressed.

When the touch keys are touched, they can be automatically inverted and a tone can sound, indicating

they have been touched. At the same time, the defined return code of the key is transmitted via the serial

interface, or an internal touch macro with the number of the return code is started.

Example:

Definition of a key from field 3 to 9 with the return code 65=´A´ and the text

"STOP". Note: Before individual keys are defined, all fields should be disabled

by means of "ESC T R".

Example

Codes to be output

Note

For compiler

#TH 11, 21, ´A´, 2, "STOP"

The end code 0 is not specified

here

As ASCII

ESC

T

H

.

.

A

.

S

T

O

P

.

The dots ´.´ stand for ASCII

characters that are not to be

displayed

In hex

$1B $54 $48 $0B $15 $41 $02 $53 $54 $4F $50 $00

In decimal

27

84

72

11

21

65

2

83

84

79

80

0

Matrix Keypad Connector

J4

Pin

Symbol

Function

1

IN 1

Input Column 1

2

OUT 1

Output Line 1

3

IN 2

Input Column 2

4

OUT 2

Output Line 2

5

IN 3

Input Column 3

6

OUT 3

Output Line 3

7

IN 4

Input Column 4

8

NC

not connected

9

IN 5

Input Columne 5

10

NC

not connected

Example