7 Communication Protocol
1. RS-232 using NULL MODEM at 9600 baud.
2. Command structure is 4 bytes.
First byte options:
DEC HEX
1 128 80 RESET VIDEO
2 160 A0 READ PARAMETER
3 161 A1 WRITE PARAMETER
4 189 BD IDENTIFY MACHINE
5 33 21 Set (for the rest of commands)
Second byte is the command type (7 bits + 80 HEX).
Third byte is the parameter value (7 bits + 80 HEX).
Byte 4 is the machine address: can be 98 or 99 (in HEX).
Note:
1. When working in HEX, add 80 to the values in the table.
2. When working in DEC, add 128 to the values in the table.
3. All values in the table are in DEC.
Byte 2 Command Description Byte 3 (parameter value)
0 INPUT FORMAT 0 - CV
1 - YC
2 - YUV
1 INPUT_STANDARD 0 - PAL B
1 - PAL N
2 - PAL M
3 - NT 3
4 - NT 4
5 - SEC
21 OUTPUT_STANDARD 0 - PAL B
(Read only) 3 - NT 3
22 GENLOCK 0 - OFF
1 - ON
23 PANEL_LOCK 0 - OFF
1 – ON
28 GENLOCK_STAT 0 – No genlock
(Read only) 1 – Genlock
32 NO_INPUT_DETECT 0 – Input detected
(Read only) 1 – No input signal
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