Lexicon MC-12 用户指南
Lexicon
MC-12 Serial Communications Protocol
MC-12 Serial Communications Protocol
Printed on: 07/13/05
7 Application Layer
7.1 MC-12 Asynchronous Notification Packets
MC-12 has been designed to transmit the asynchronous notification packets following these system
changes:
changes:
1. Power On
2. Entering Standby
3. Front Panel Display update
4. Parameter Value Changes.
The notification packets are defined as follows:
7.1.1 Wakeup Notification (MC-12, MC-1)
By transmitting the Wakeup Notification, MC-12 indicates the unit has just “powered on” or reset and is
ready to receive host commands. This notification is primarily for the HOST to know the status of the MC-
12.
ready to receive host commands. This notification is primarily for the HOST to know the status of the MC-
12.
7.1.1.1 Notification Packet Description
Application Header:
Command DC_WAKEUP 0x01
Data Count
Data Count
0
0x00
Application Data:
N/A
7.1.1.2 Host Response
The MC-12 does not expect any response from the HOST.
7.1.2 Sleep Notification (MC-12, MC-1)
By transmitting the Sleep Notification, MC-12 indicates the unit is shutting down into a standby mode.
Because the hard power switch could be activated independently of the MC-12 system software, hard
power down will not be notified. Acknowledgment of the Sleep Notification is not required. This
notification is primarily for the HOST to know the operating status of the MC-12.
Because the hard power switch could be activated independently of the MC-12 system software, hard
power down will not be notified. Acknowledgment of the Sleep Notification is not required. This
notification is primarily for the HOST to know the operating status of the MC-12.
7.1.2.1 Notification Packet Description
Application Header:
Command DC_SLEEP 0x02
Data Count
Data Count
0
0x00
Application Data:
N/A
7.1.3 Front Panel Display (MC-12, MC-1)
MC-12 will transmit the front panel display buffer following the update to the MC-12 front panel display.
The MC-12 front panel display is 2 X 20 ASCII character display. The HOST can enable transmission of
this notification message by sending Host Wakeup (7.3.29). To disable transmission the HOST can send
Host Sleep (7.3.30). Transmission of the display buffer is asynchronous to other host/MC-12
The MC-12 front panel display is 2 X 20 ASCII character display. The HOST can enable transmission of
this notification message by sending Host Wakeup (7.3.29). To disable transmission the HOST can send
Host Sleep (7.3.30). Transmission of the display buffer is asynchronous to other host/MC-12
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