20
Serial/Ethernet/USB Communication (SCOM) Interface
IND100084-18
SCOM Section: Glass Display Control
™
(GDC)
Commands related to configure and control the GDC behaviour.
"GMB" - Buttons Minimum Brightness
This command controls the minimum brightness level of the button LEDs of keypad and GDC system. The BRL level
can never be lower than this limit no matter which "GBF mode" it is in.
Byte #
0
1
2
3
4
5
6
7
8
0x07 0xFF 0x47 0x4D 0x42 0x01 IHCHK Buttons Minimum Brightness IDCHK
Buttons Minimum Brightness:
A value describing the minimum allowed LED brightness level.
Range: [0x00-0xFF]
0x00: is "No minimum limit".
0xFF: is "Buttons will always be at max brightness".
After unit reset the value is set to: last stored value.
After microcontroller reset the value is set to: last stored value. (0x00 if no stored value)
Write:
This command will set the minimum brightness level of the button LEDs. The brightness value shall be sent as 1 byte
in the DATA field. If the current level of the button brightness (BRL) is lower than the new GMB value, BRL level must
be raised to the GMB level.
Example:
Set GMB 0x01:
0x07
0xFF
0x47
0x4D
0x42
0x01
0x22
0x01
0xFE
ACK reply from unit:
0x06
0xFF
0x47
0x4D
0x42
0x01
0x23
0x01
0xFE
Read:
If the current BRL level is smaller than the GMB level, this command will return the GMB level. If the current BRL level
is bigger than the GMB level, this command will return the BRL level. The length of DATA shall be zero.
Example:
Get GMB:
0x07
0xFF
0x47
0x4D
0x42
0x00
0x22
ACK reply from unit:
0x06
0xFF
0x47
0x47
0x4D
0x42
0x01
0x23
0x99*
0x66
*In this example, BRL was bigger than GMB level and thus BRL was returned.
