MD-219 Hardware Manual
Display UART Commands
C-2
OSD Control Command
In this section, we describe the OSD control commands that can be used to configure the display. See the
following descriptions.
BRI (Brightness Minimum Value)
This command sets the brightness minimum value. The range is from 0x00 to 0x31 (0% - 100%). LEN=one
data byte.
Examples:
Command to set 30% brightness.
0x07
0xFF
0x42
0x52
0x49
0x01
0x1B
0x10
0xEF
BRL (Set LED Brightness of Touch Keypad)
This command sets the LED brightness value of the touch keypad. The range is from 0x00 to 0x31 (0% -
100%).The default brightness value of the touch keypad will be changed in the ratio of the panel backlight
brightness. You can send
?toquery
the current value of the led brightness value. LEN=one data byte.
Examples:
Command to set 100% Brightness.
0x07
0xFF
0x42
0x52
0x4C
0x01
0x18
0x31
0xCE
BRM (Brightness Maximum Value)
This command sets the brightness maximum value. The range is from 0x00 to 0xFF (0% - 100%). LEN=one
data byte.
Examples:
Command to set 88% Brightness.
0x07
0xFF
0x42
0x52
0x4D
0x01
0x17
0xE0
0x1F
BRT (User Brightness Control)
This command sets the maximum brightness of the panel. The range is from 0x00 to 0xFF (0% - 100%). The
default value is
0xFF
.
Note that whenever the MD-219 has been restarted, the BRT value will be reset to 100%. If the BRT value has
been changed (i.e., the BRT value does not equal 0xFF), the ECDIS function will not be supported and the
ECDIS function keys will be disabled and turned off.
If the data and data checksum are incorrect, the reply data field is the current BRT value. LEN=one data byte.
Examples:
Command to set 40% Brightness.
0x07
0xFF
0x42
0x52
0x54
0x01
0x10
0x66
0x99
ACK set to 40% Brightness
0x06
0xFF
0x42
0x52
0x54
0x01
0x11
0x66
0x99
NAK default Brightness 100%
0x15
0xFF
0x42
0x52
0x54
0x01
0x02
0xFF
0x00
