Hand shake flow charts for control commands
Host sends a command that causes a change in PMD570 status.
PMD570 | Typical Host |
Control Command
Received Command
OK
Host sends a command that causes no change in PMD570 status. For example, Host requests Play during Playback.
PMD570 | Typical Host |
Control Command
Received Command
Status Request Commands from the host are received by the PMD570, then the status information code is transmitted to the host.
PMD570 | Typical Host |
Control command codes
The control command packets have a data length of 7~10 bytes. ASCII codes from 0x00 to 0x7f are used to receive serial data. At the transmission end, take steps to convert the ASCII codes into HEX data to set the data in the data packets. CR (0x0d) is added as the data packet delimiter.
Example: Control command code for number 5 (ASCII code @02305CR)
@ |
| 0 |
| 2 |
| 3 |
| 0 |
| 5 |
| CR |
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0x40 |
| 0x30 |
| 0x32 |
| 0x33 |
| 0x30 |
| 0x35 |
| 0x0d |
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When transmitting commands consecutively, put more than 100ms blank between commands.
Status Request and Status Information codes :
The status data packets have a fixed data length of 8 bytes. ASCII codes from 0x00 to 0x7f are used to transmit serial data. For this reason, the ASCII codes are converted into HEX data before the data is set in the data packets and transmitted. CR (0x0d) is added as the data packet delim- iter.
Example: Status Information code "Door open"
(ASCII code @0DS01CR)
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| 0 |
| D |
| S |
| 0 |
| 1 |
| CR |
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0x40 |
| 0x30 |
| 0x44 |
| 0x53 |
| 0x30 |
| 0x31 |
| 0x0d |
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Received Command
Status Information Command
Status Request Command
Table of Control command codes |
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Control Command | Code |
0 | “@02300” + CR |
1 | “@02301” + CR |
2 | “@02302” + CR |
A change in the state of the PMD570 automatically transmits a status information code to the host.
PMD570 | Typical Host |
Status Informaton
Command
3 | “@02303” + CR |
4 | “@02304” + CR |
5 | “@02305” + CR |
6 | “@02306” + CR |
7 | “@02307” + CR |
8 | “@02308” + CR |
9 | “@02309” + CR |
DISPLAY | “@02311” + CR |
Standby | “@02312” + CR |
Power ON | “@023PW” + CR |
Add EDL mark | “@023121” + CR |
Recording Volume + | “@023V+” + CR |
Recording Volume | |
Recording Balance Right | “@023BR” + CR |
Recording Balance Left | “@023BL” + CR |
Track Jump >>I (Next) | “@02332” + CR |
Track Jump I<< (Back) | “@02333” + CR |
PAUSE | “@02348” + CR |
Fast Reverse Start << | “@02350” + CR |
continues
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