Inputs as Key Matrix (ICX-AlphaCom)

Use Inputs As Key Matrix

If there is a need for more than the 6 inputs available, it is possible to combine inputs in a diode matrix and use the Event Handler to process. By for example using 3 physical inputs it is possible to get 7 virtual inputs.

The different options are:

2 Inputs (input 1-2, Virtual Inputs 1-3)

Input 2	Input 1	Virtual Input triggered
0	1	Virtual Input 1
1	0	Virtual Input 2
1	1	Virtual Input 3
0	0	Inputs released

3 Inputs (input 1-3, Virtual Inputs 1-7):

Diode matrix when using 3 inputs to activate 7 DAK keys

Input 3	Input 2	Input 1	Virtual Input triggered
0	0	1	Virtual Input 1
0	1	0	Virtual Input 2
0	1	1	Virtual Input 3
1	0	0	Virtual Input 4
1	0	1	Virtual Input 5
1	1	0	Virtual Input 6
1	1	1	Virtual Input 7
0	0	0	Inputs released

4 Inputs (input 1-4, Virtual Input 1-15):

Input 4	Input 3	Input 2	Input 1	Virtual Input triggered
0	0	0	1	Virtual Input 1
0	0	1	0	Virtual Input 2
0	0	1	1	Virtual Input 3
0	1	0	0	Virtual Input 4
0	1	0	1	Virtual Input 5
0	1	1	0	Virtual Input 6
0	1	1	1	Virtual Input 7
1	0	0	0	Virtual Input 8
1	0	0	1	Virtual Input 9
1	0	1	0	Virtual Input 10
1	0	1	1	Virtual Input 11
1	1	0	0	Virtual Input 12
1	1	0	1	Virtual Input 13
1	1	1	0	Virtual Input 14
1	1	1	1	Virtual Input 15
0	0	0	0	Inputs released

The Virtual Input actions are configured from the Event Handler.

Events

Two events are required to process inputs as a matrix. Shown below are the events required for 15 inputs (2^4). You can expand this to 63 inputs (2^6) if required.

On button press

Here, we use the serial nature of the Event Handler to process the individual inputs.
By assigning a bitwise value to the input, we can add this value to a UDD associated with the physical number.
As each successive input is processed by the event handler, a total sum is derived.

Action commands:

IF %op(%sev(1),=,1)
!Input 1
WUDD %1.PHY %op(%udd(%1.PHY),+,1)
ENDIF
IF %op(%sev(1),=,2)
!Input 2
WUDD %1.PHY %op(%udd(%1.PHY),+,2)
ENDIF
IF %op(%sev(1),=,3)
!Input 3
WUDD %1.PHY %op(%udd(%1.PHY),+,4)
ENDIF
IF %op(%sev(1),=,4)
!Input 4
WUDD %1.PHY %op(%udd(%1.PHY),+,8)
ENDIF

On button release

Here, we again rely on the serial processing of the input release.
First we check if the UDD has a value other than 0.
Then we check the value of the UDD and process the required command. This can be a $DD, $DIAL_DAK, $SM or any other DP command.
After the first round of processing, the UDD is returned to 0 so that successive input release commands do not execute.