Front Panel Display; Mc-4 Parameter Notification By Id - Lexicon MC-4 V1.00 - SERIAL PROTOCOL DEFINITIONS REV 1-6 Manual

Lexicon

6.1.3 Front Panel Display

MC-4 will transmit the front panel display buffer following the update to the MC-4 front panel display. The
MC-4 front panel display is 2 X 20 ASCII character display. The HOST can enable transmission of this
notification message by sending Host Wakeup
send Host Sleep (6.3.6 page
communication and will only transmit following the completion of any communication exchanges in
progress or pending.
6.1.3.1 Notification Packet Description
6.1.3.2 Data Description
Line1
Data Type:
Max Length:
Line2
Data Type:
Max Length:
The MC-4 includes 8 custom characters that are defined to display increments of a display block.
(i.e. Volume Bar) The custom characters are ASCII character codes 8E - 93(hex). The codes
are used as follows:
'8E' - empty cell
'8F' - left 1 bar
'90' - left 2 bars
'91' - left 3 bars
'92' - left 4 bars
'93' - full cell
6.1.3.3 HOST Response
The MC-4 does not expect any response from the HOST.

6.1.4 MC-4 Parameter Notification by Id

MC-4 will transmit parameter change notifications if they are enabled using the command described in
Set Parameter Notification by Id
or system action the MC-4 will transmit the current value of the parameter that is changing.
(6.3.5 page
14). Transmission of the display buffer is asynchronous to other host/MC-4
Application Header:
Command
Data Count
Application Data:
Data[0] - Data[20]
Data[21] - Data[41]
Null (0x00) terminated ASCII character string.
DISP_LINE_LENGTH defined in the Protocol Constants table
(Appendix D page
Null (0x00) terminated ASCII character string.
DISP_LINE_LENGTH defined in the Protocol Constants table
(Appendix D page
(6.3.17 page 26). If a parameter value is changed due to any user action
MC-4 Serial Communications Protocol
13). To disable transmission the HOST can
DC_FPD 0x03
42 0x2A
Line1 ch ch ch... 0x00
Line2 ch ch ch ... 0x00
38).
38).
9