Lexicon DC-2 - Manual (Page 10)

Lexicon, Inc.
DC-2/MC-1 Serial Communications Protocol
Printed on: 10/19/00
10 of 44
Zone 2 Balance Z2_BAL
Zone 2 Mute Z2_MUTE
Bass BASS
Treble TREBLE
Loudness LOUDNESS
Tilt TILT
Menu Background On/Off MENU_BKGND
The parameter definitions for each of these parameters can be obtained by querying the DC-2/MC-1 with
the DC_CMD_GET_SYS_PARAM_BY_NAME command. The DC_RESP_SYS_PARAM_DEF will
contain the ParamId for each of the parameters. The ParamId may change with s/w version changes, but the
Parameter Name will not.
7.2 Acknowledgment Packets
Acknowledge and No Acknowledge packets are used to communicate transmission, packet and data
validation status. Both the HOST and DC-2/MC-1 can transmit and receive these packets.
7.2.1 Acknowledge
7.2.1.1 Packet Description
Application Header:
Command
DC_ACK 0xE0
Data Count 1 0x01
Application Data:
Data[0]
Command nn
7.2.1.2 Data Description
Command:
DataType: Valid DC-2/MC-1 command as defined in Appendix A Command Codes.
7.2.2 No Acknowledge
7.2.2.1 Packet Description
Application Header:
Command
DC_NACK 0xE1
Data Count 2 0x02
Application Data:
Data[0]
Command nn
Data[1] ErrorCode nn
7.2.2.2 Data Description
Command:
DataType: Valid DC-2/MC-1 command as defined in Appendix A Command Codes.
ErrorCode:
DataType: Error code as defined in Appendix B Error Codes.