Communication Protocol
Table 19: Instruction Codes
| INSTRUCTION |
| DEFINITION FOR SPECIFIC INSTRUCTION | NOTE | ||
# | DESCRIPTION |
| INPUT |
| OUTPUT |
|
0 | RESET MACHINE | 0 |
| 0 |
| 1 |
1 | SWITCH GROUPS | 2 | ||||
|
| inputs to be switched for the | which output is to be |
| ||
|
| relative group | switched |
| ||
2 | SWITCH AUDIO OUTPUTS | 1 |
| 2 | ||
|
| be switched to Master Audio out |
|
|
| |
5 | REQUEST GROUP STATUS | 0 |
| 3 | ||
|
|
|
| which status is required |
| |
6 | REQUEST STATUS OF | 0 |
| 1 |
| 3 |
| MASTER AUDIO OUTPUT |
|
|
|
|
|
8 | BREAKAWAY SETTING | 0 |
| 0 | – | 2 |
|
|
|
| 1 | – Audio breakaway |
|
11 | REQUEST BREAKAWAY | 0 |
| 0 |
| 3 |
| SETTING |
|
|
|
|
|
16 | ERROR | Don’t care | 0 | – Invalid instruction | 4 | |
|
|
|
| 1 | – Out of range |
|
18 | RESET MACHINE | 0 |
| 0 |
| 1 |
22 | SET AUDIO GAIN OF AUDIO | Gain value | 7 | |||
| OUTPUT |
|
|
|
|
|
24 | INCREASE/DECREASE AUDIO | 0 | – Increase gain | 8 | ||
| GAIN |
|
| 1 | – Decrease gain |
|
25 | REQUEST GAIN | 0 | – Video gain | 3, 9 | ||
|
|
|
| 1 | – Audio gain |
|
30 | LOCK FRONT PANEL | 0 | – Panel unlocked | 0 |
|
|
|
| 1 | – Panel locked |
|
|
|
31 | REQUEST WHETHER PANEL | 0 |
| 0 |
| 3 |
| IS LOCKED |
|
|
|
|
|
44 | MEDIA CONTROL | Set equal to switch number | Switch data |
| ||
45 | REQUEST MEDIA CONTROL | Set equal to switch number | 0 |
|
| |
| SETTINGS |
|
|
|
|
|
57 | SET AUTO SAVE | 1 | – Autosave | Don’t care | 5 | |
|
| 2 | – No save |
|
|
|
61 | IDENTIFY MACHINE | 1 or 2 – Machine name | 0 | – request first 4 digits | 6 | |
|
| 3 or 4 – Program version | 1 | – request first suffix |
| |
|
|
|
| 10 – request first prefix |
| |
62 | DEFINE MACHINE | 1 | – Number of inputs | 1 | – For video | 3 |
|
| 2 | – Number of outputs | 2 | – For audio |
|
*1 – for CV group, 2 – for SV group, 3 – for VGA group, 4 – for microphone, 5 – for master audio out NOTES on to Table 19:
NOTE 1
When the master switcher is reset, (e.g. when it is turned on), the reset code is sent to the PC. If this code is sent to the switchers, it will reset according to the present
NOTE 2
These are
0000 0001 | Instruction “ Switch Groups” |
1000 0010 | Input #2 |
1000 1001 | in composite video group |
1000 0001 | Machine #1 (master) |
Was sent from the PC, then the switcher (machine #1) will switch input 2 in composite video group to its output. If the user switched input 4 in the VGA group via the front panel keypad, then the switcher will send:
0100 0001
1000 0100
1000 0011
1000 0001 to the PC.
When the PC sends instruction #1 or #2 to the switcher, then, if the instruction is valid, the switcher replies by sending the same four bytes to the PC that were sent (except for the first byte, where the DESTINATION bit is set high).
50 | KRAMER: SIMPLE CREATIVE TECHNOLOGY |
