Front Panel Display - Lexicon RV-8 V2.0 - SERIAL PROTOCOL DEFINITIONS REV 1-8 Manual

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7.1.3 Front Panel Display

RV8 will transmit the front panel display buffer following the update to the RV8 front panel
display. The RV8 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/RV8 communication and will only transmit following the completion of
any communication exchanges in progress or pending.
7.1.3.1 Notification Packet Description
Application Header:
Command
Data Count
Application Data:
Data[0] - Data[20]
Data[21] - Data[41]
7.1.3.2 Data Description
Line1
Data Type:
Max Length:
Line2
Data Type:
Max Length:
The RV8 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
7.1.3.3 HOST Response
The RV8 does not expect any response from the HOST.
DC_FPD
42
Line1
Line2
Null (0x00) terminated ASCII character string.
DISP_LINE_LENGTH defined in Appendix G Protocol Constants.
Null (0x00) terminated ASCII character string.
DISP_LINE_LENGTH defined in Appendix G Protocol Constants.
RV-8 Serial Communications Protocol
0x03
0x2A
ch ch ch... 0x00
ch ch ch ... 0x00
9