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Lexicon, Inc.
RV-8 Serial Communications Protocol
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/RV-8 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 RV-8 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 RV-8 does not expect any response from the HOST.
7.1.4 RV-8 Parameter Notification by Id
RV-8 will transmit parameter change notifications if they are enabled using the command described in
7.3.19
(Set_Parameter_Notification_By_Id). If a parameter value is changed due to any user action or
system action the RV-8 will transmit the current value of the parameter that is changing.
7.1.4.1 Command Packet Description
Application Header:
Command
Data Count
Application Data:
Data[0]
Data[1]
Data[2]
Data[3-23]
7.1.4.2 Data Description
© 2005 Lexicon, Inc. All rights reserved.
DC_FPD
42
Line1
Line2
Null (0x00) terminated ASCII character string.
DISP_LINE_LENGTH defined in
Null (0x00) terminated ASCII character string.
DISP_LINE_LENGTH defined in
MC_PARAM_NOTIFICATION_BY_ID
24
ParamId(LSB)
ParamId(MSB)
ParamType
Value[0 -20]
Printed on: 07/26/05
0x03
0x2A
ch ch ch... 0x00
ch ch ch ... 0x00
Appendix E Protocol
Constants.
Appendix E Protocol
Constants.
0x05
0x18
nn
nn
nn
nn nn
nn...
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