User manual HARMAN KARDON SIGNATURE 2.0

[. . . ] Check each byte of a transmission against the intended message to ensure that data corruption does not occur due to multiple devices attempting to use the bus at the same time. For each message received, the receiver will generate an acknowledgment. [. . . ] If you are using more than one of any given unit, you will need to modify this byte to reflect the ID number of the unit you are trying to control. Preamble Byte Target Device Type Target Unit ID Source Device Type Source Unit ID Data Length Command Modifier Command Byte Data Byte(s) Checksum Byte The Source Device Type is a byte that distinguishes what type of unit the message is coming from (i. e. See above list. Page 5 of 20 SIGNATURE BUS PROTOCOL MASTER DOCUMENT Revised 2-24-98 Preamble Byte Target Device Type Target Unit ID Source Device Type Source Unit ID Data Length Command Modifier Command Byte Data Byte(s) Checksum Byte The Source Unit ID is a byte that distinguishes which unit of a given type the message is coming from (i. e. The Unit ID is set in the menu system of the unit that the message is coming from, default = 01h. If you are using more than one of any given unit, you will need to modify this byte. Preamble Byte Target Device Type Target Unit ID Source Device Type Source Unit ID Data Length Command Modifier Command Byte Data Byte(s) Checksum Byte The Data Length is a word representing the total number of bytes (including Command Modifier and Command bytes, but not the Data Length byte itself or the Checksum byte) in the data portion of the message. Minimum length is 02h. Preamble Byte Target Device Type Target Unit ID Source Device Type Source Unit ID Data Length Command Modifier Command Byte Data Byte(s) Checksum Byte The Command Modifier is a byte that distinguishes what type of command is being sent. HEX Command Type 01 Action request 02 Action response Preamble Byte Target Device Type Target Unit ID Source Device Type Source Unit ID Data Length Command Modifier Command Byte Data Byte(s) Checksum Byte The Command byte information required by the Command byte. Provides additional is the action that is desired. Preamble Byte Target Device Type Target Unit ID Source Device Type Source Unit ID Data Length Command Modifier Command Byte Data Byte(s) Checksum Byte The Dataadditional information required by the Command byte. the Provides bytes consist of information that is required to complete Command. The Data bytes are detailed throughout the rest of this document. Preamble Byte Target Device Type Target Unit ID Source Device Type Source Unit ID Data Length Command Modifier Command Byte Data Byte(s) Checksum Byte The Checksum is a byte whose value confirms/voids the validity of a Provides additional information required by the Command byte. It is computed by adding up all of the bytes Preamble through the last Data byte, and then taking the 1s complement of the lower eight bits of that sum (i. e. add up all the bytes, truncate to eight bits, and invert each of the bits). See the page 7 for an example. Page 6 of 20 SIGNATURE BUS PROTOCOL MASTER DOCUMENT Revised 2-24-98 EXAMPLE OF MESSAGE CREATION Create a Power On command from a Signature 3. 0 to a Signature 2. 0 in a single 2. 0 / single 3. 0 system. [. . . ] RESPONSE: Preamble Byte Target Device Type Target Unit ID Source Device Type Source Unit ID Data Length Command Modifier Command Byte Data Byte(s) Checksum Byte 7Eh 30h 01h 20h 01h Computed 02h 72h See below See page 7 uint spkr_cfg; uchar spkr_mutes; char Volume_preset; Spkr_adj_st spkr_adjs; signed char center_level; signed char front_right_level; signed char front_left_level; signed char back_right_level; signed char back_left_level; signed char subwfr_level; char front_distance; char cen_distance; char back_distance; char source; uint opFlag; char svidRecSrc; char compvidRecSrc; char audRecSrc; char dsplyTimoutVal; char frntPnlSts; char frntPnlBrit; char menuBkgrnd; // current speaker configuration // mask bits for speaker group muting // power-on volume setting // speaker level adjustments // currently active source // general purpose operational flags // used when tracking disabled // used when tracking disabled // used when tracking disabled // seconds counter for VFD/OSD dsply timeout // Off, On, or Timeout // Dim, Med or High Page 13 of 20 SIGNATURE BUS PROTOCOL MASTER DOCUMENT Revised 2-24-98 CONTENTS OF NON-VOLATILE MEMORY REQUEST (CONT. ) Profile_st defaultProfile; // the "Current" f/x profile char bass_eq; // bass EQ level char hi_eq; // treble cut level char centr_mod; // center mode char surr_mod; // surr mode char centr_lvl_mod; // level modifier for current center mode char surr_lvl_mod; // level modifier for current surround mode signed char sub_lvl_mod; // level modifier for subwoofer Balance_st balance; // balance data signed char lrBal; // item to be adjusted signed char fbBal; // Input_st Input[NUM_INPUTS]; char name[INPUT_NAME_WIDTH]; // input name char fxMode; // index to the fx mode struct Profile_st profile; // profile for this input char bass_eq; // bass EQ level char hi_eq; // treble cut level char centr_mod; // center mode char surr_mod; // surr mode char centr_lvl_mod; // level modifier for current center mode char surr_lvl_mod; // level modifier for current surround mode signed char sub_lvl_mod; // level modifier for subwoofer Balance_st balance; // balance data signed char lrBal; // item to be adjusted signed char fbBal; // uchar audio_src; char video_src; char video_mode; // S-video or composite video char input_level_left; // left input level for this input char input_level_right; // left input level for this input char graphics; // menu background = blue or video uint flags; Page 14 of 20 SIGNATURE BUS PROTOCOL MASTER DOCUMENT Revised 2-24-98 CONTENTS OF NON-VOLATILE MEMORY REQUEST (CONT. ) TunerPSet_st int char char char char TunerState_st int int int int int int int char char char char uint char TnrPSet[NUM_PRESETS_TUNER]; nFreq; cBand; cRDS; szID[RDS_TYPE_SIZE]; cType; TnrState; nCountry; nCurBand; nCurFreq; nCurPreset; nCurFMFreq; nCurAMFreq; nCurLWFreq; RDSTblGapLow; RDSTblGapHi; unitID; pwrUpState; version; filler[13]; // station frequency // USA_FM, USA_AM, EUR_FM, EUR_AM // flag - rds auto or manual. if manual, user // can store ID & PTY // 8 char station id // index into RDSTypeTable string table // describe the 'hole' in the. . . 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