Owner's manual

Command Reference
Beijer Electronics, MAEN975 29
6.7 MCC_CONTRAST (0x82)
Contrast
Adjusts or queries the contrast value of the video controller.
Supported since Firmware Version
MT230 Nautic Monitor: 1.0
Command Stream
0 1 2 3 4 5 6 7...7+[LEN]-1 7+[LEN]
0x07 ADR
0x4D 0x43 0x43 LEN ICHKH 0x82 Ext Ret ICHKD
Ext:
Value: “A” or “a” (0x41 or 0x61)
Type: ASCII character
Length: 1
Description: Command extension.
This character must be always sent as part of the sub-
command.
Param: ABSOLUTE
Value: “00”: low … “FF”: high
Type: Two-digit ASCII-encoded hexadecimal number
Length: 2
Description: New contrast value
Param: INC
Value: “+” (0x2B)
Type: ASCII character
Length: 1
Description: Increment the current contrast value
Param: DEC
Value: “-” (0x2D)
Type: ASCII character
Length: 1
Description: Decrement the current contrast value
Param: RESET
Value: “R” or “r” (0x52 or 0x72)
Type: ASCII character
Length: 1
Description: Reset the contrast to an internally predefined value
Param: QUERY
Value: “?” (0x3F)
Type: ASCII character
Length: 1
Description: Query the current contrast value