EMBRON HATTELAND TECHNOLOGY X MMD G2 Series, Техническое руководство

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Serial/Ethernet/USB Communication (SCOM) Interface
IND100084-18
"BRT" - Brightness Control
This command controls the display backlight brightness setting. If BRT is 100%, the user can adjust the user
brightness (BRU) from 0-100%. If the BRT is set to 60%, the visual brightness is set to 60%. The user can adjust
the user brightness (BRU) from 0-100% within the 60% set by BRT. If the user sets the user Brightness to half
(BRU=50%), the visual brightness will be 30% (half of 60%). If BRT is set back to 100%, the visual brightness will be
50% (half of 100%).
Byte # 0 1 2 3 4 5 6 7 8
0x07 0xFF 0x42 0x52 0x54 0x01 IHCHK BRT IDCHK
BRT: A value describing the brightness.
This command can only be set using SCOM and can not be adjusted directly by press of a button etc.
Range: [0x00-0xFF]
0x00: is off.
0xFF: is max brightness.
After unit reset the value is set to: Load BRT value from factory configuration file.
After microcontroller reset the value is set to: Load BRT value from factory configuration file.
Write:
The brightness value shall be sent as one byte in the DATA field. Intermediate values will control brightness over the
range from minimum to maximum luminance.
Example:
Set 60% BRT:
0x07 0xFF 0x42 0x52 0x54 0x01 0x10 0x99 0x66
ACK reply from unit:
0x06 0xFF 0x42 0x52 0x54 0x01 0x11 0x99 0x66
Read:
Get the BRT variable. To trigger a BRT read command, the length of the DATA field must be zero. The DATA field in
the microcontroller reply will indicate the current brightness control setting.
Example:
GET BRT value:
0x07 0xFF 0x42 0x52 0x54 0x00 0x10
ACK reply from unit:
0x06 0xFF 0x42 0x52 0x54 0x01 0x11 0x99 0x66