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首页MOST Specification V3.0
1.1 Purpose This document, which all other MOST Specifications relate to, is the main specification of MOST (Media Oriented System Transport). 1.2 Scope This document contains the specification of the MOST application layer and the MOST network layer. This specification is speed grade independent. However, it is not fully backward compatible to the existing speed grades MOST25 and MOST50 as described in the MOST Specification Rev. 2.5. In some cases a differentiation between specific implementations (speed grade, physical interface) is necessary. The following terms are used to mark corresponding passages.
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© Copyright 1999 - 2008 MOST Cooperation
MOST
Media Oriented Systems Transport
Multimedia and Control
Networking Technology
MOST Specification
Rev 3.0
05/2008
Specification Document
© Copyright 1999 - 2008 MOST Cooperation
Page 2
MOST
®
Specification
MOST Specification
Rev 3.0 05/2008
Legal Notice
COPYRIGHT
© Copyright 1999 - 2008 MOST Cooperation. All rights reserved.
LICENSE DISCLAIMER
Nothing on any MOST Cooperation Web Site, or in any MOST Cooperation document, shall be
construed as conferring any license under any of the MOST Cooperation or its members or any third
party's intellectual property rights, whether by estoppel, implication, or otherwise.
CONTENT AND LIABILITY DISCLAIMER
MOST Cooperation or its members shall not be responsible for any errors or omissions contained at
any MOST Cooperation Web Site, or in any MOST Cooperation document, and reserves the right to
make changes without notice. Accordingly, all MOST Cooperation and third party information is
provided "AS IS". In addition, MOST Cooperation or its members are not responsible for the content of
any other Web Site linked to any MOST Cooperation Web Site. Links are provided as Internet
navigation tools only.
MOST COOPERATION AND ITS MEMBERS DISCLAIM ALL WARRANTIES WITH REGARD TO
THE INFORMATION (INCLUDING ANY SOFTWARE) PROVIDED, INCLUDING THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, AND
NON-INFRINGEMENT. Some jurisdictions do not allow the exclusion of implied warranties, so the
above exclusion may not apply to you.
In no event shall MOST Cooperation or its members be liable for any damages whatsoever, and in
particular MOST Cooperation or its members shall not be liable for special, indirect, consequential, or
incidental damages, or damages for lost profits, loss of revenue, or loss of use, arising out of or
related to any MOST Cooperation Web Site, any MOST Cooperation document, or the information
contained in it, whether such damages arise in contract, negligence, tort, under statute, in equity, at
law or otherwise.
FEEDBACK INFORMATION
Any information provided to MOST Cooperation in connection with any MOST Cooperation Web Site,
or any MOST Cooperation document, shall be provided by the submitter and received by MOST
Cooperation on a non-confidential basis. MOST Cooperation shall be free to use such information on
an unrestricted basis.
TRADEMARKS
MOST Cooperation and its members prohibit the unauthorized use of any of their trademarks. MOST
Cooperation specifically prohibits the use of the MOST Cooperation LOGO unless the use is approved
by the Steering Committee of MOST Cooperation.
SUPPORT AND FURTHER INFORMATION
For more information on the MOST technology, please contact:
MOST Cooperation
Administration
D-76185 Karlsruhe
Germany
Tel: (+49) (0) 721 966 50 00
Fax: (+49) (0) 721 966 50 01
E-mail: contact@mostcooperation.com
Web: www.mostcooperation.com
Specification Document
© Copyright 1999 - 2008 MOST Cooperation
Page 4
MOST
®
Specification
MOST Specification
Rev 3.0 05/2008
Contents
GLOSSARY ...........................................................................................................................................19
1 INTRODUCTION .............................................................................................................................20
1.1 Purpose .......................................................................................................................................20
1.2 Scope ...........................................................................................................................................20
1.3 MOST Document Structure .........................................................................................................21
1.4 References ..................................................................................................................................22
1.5 Overview ......................................................................................................................................22
2 APPLICATION SECTION ...............................................................................................................23
2.1 Application Layer Service Specification.......................................................................................23
2.1.1 Basic Principles of MOST .....................................................................................................23
2.1.1.1 Overview of Data Transport ............................................................................................................ 23
2.1.1.1.1 Control Channel ....................................................................................................................... 23
2.1.1.1.2 Streaming Data ........................................................................................................................ 24
2.1.1.1.3 Packet Data Channel ............................................................................................................... 24
2.1.2 Device Model ........................................................................................................................25
2.1.2.1 Function Block ................................................................................................................................ 25
2.1.2.1.1 Slave, Controller, HMI .............................................................................................................. 26
2.1.2.1.2 First Introduction to MOST Functions ...................................................................................... 26
2.1.2.2 Functions ........................................................................................................................................ 27
2.1.2.3 Methods .......................................................................................................................................... 27
2.1.2.4 Properties ....................................................................................................................................... 28
2.1.2.4.1 Setting a Property .................................................................................................................... 28
2.1.2.4.2 Reading a Property .................................................................................................................. 28
2.1.2.5 Events ............................................................................................................................................. 29
2.1.2.6 Addressing MOST Functions .......................................................................................................... 30
2.2 Application Layer Protocol Specification .....................................................................................31
2.2.1 Application Messages in a MOST Network (Introduction)....................................................31
2.2.2 Controller / Slave Communication ........................................................................................34
2.2.2.1 Communication with Properties Using Shadows ............................................................................ 34
2.2.2.2 Communication with Methods ......................................................................................................... 39
2.2.2.2.1 Using Methods with SenderHandle .......................................................................................... 39
2.2.2.2.2 Using Methods without SenderHandle ..................................................................................... 40
2.2.3 Structure of MOST Messages ..............................................................................................41
2.2.3.1 DeviceID ......................................................................................................................................... 41
2.2.3.1.1 Basics for Automatic Adding of Device Addresses .................................................................. 41
2.2.3.2 FBlockID ......................................................................................................................................... 43
2.2.3.2.1 Handling of Supplier Specific FBlocks ..................................................................................... 44
2.2.3.3 InstID .............................................................................................................................................. 45
2.2.3.3.1 Uniqueness of Functional Addresses ....................................................................................... 45
2.2.3.3.2 Assigning InstID ....................................................................................................................... 45
2.2.3.3.3 InstID of NetBlock .................................................................................................................... 45
2.2.3.3.4 InstID of NetworkMaster .......................................................................................................... 45
2.2.3.3.5 InstID of Function Block EnhancedTestability .......................................................................... 45
2.2.3.3.6 InstID Wildcards ....................................................................................................................... 46
2.2.3.4 FktID ............................................................................................................................................... 46
2.2.3.5 OPType .......................................................................................................................................... 48
2.2.3.5.1 Error ......................................................................................................................................... 49
2.2.3.5.2 Start, Error ............................................................................................................................... 54
2.2.3.5.3 StartResult, Result, Processing, Error ..................................................................................... 54
2.2.3.5.4 StartAck, StartResultAck, ProcessingAck, ResultAck, ErrorAck .............................................. 56
2.2.3.5.5 Get, Status, Error ..................................................................................................................... 57
2.2.3.5.6 Set, Status, Error ..................................................................................................................... 57
2.2.3.5.7 SetGet, Status, Error ................................................................................................................ 58
2.2.3.5.8 GetInterface, Interface, Error ................................................................................................... 58
2.2.3.5.9 Increment and Decrement, Status, Error ................................................................................. 58
2.2.3.5.10 Abort, Error ............................................................................................................................ 58
2.2.3.5.11 AbortAck, ErrorAck ................................................................................................................ 58
2.2.3.6 Function Formats in Documentation ............................................................................................... 59
Specification Document
© Copyright 1999 - 2008 MOST Cooperation
Page 5
MOST
®
Specification
MOST Specification
Rev 3.0 05/2008
2.2.3.7 Length ............................................................................................................................................. 59
2.2.3.8 Data and Basic Data Types ............................................................................................................ 60
2.2.3.8.1 Boolean .................................................................................................................................... 61
2.2.3.8.2 BitField ..................................................................................................................................... 61
2.2.3.8.3 Enum ....................................................................................................................................... 63
2.2.3.8.4 Unsigned Byte .......................................................................................................................... 63
2.2.3.8.5 Signed Byte .............................................................................................................................. 63
2.2.3.8.6 Unsigned Word ........................................................................................................................ 63
2.2.3.8.7 Signed Word ............................................................................................................................ 63
2.2.3.8.8 Unsigned Long ......................................................................................................................... 63
2.2.3.8.9 Signed Long ............................................................................................................................. 63
2.2.3.8.10 String ..................................................................................................................................... 64
2.2.3.8.11 Stream ................................................................................................................................... 65
2.2.3.8.11.1 Stream Cases ................................................................................................................. 65
2.2.3.8.11.2 Stream Signals ................................................................................................................ 66
2.2.3.8.12 Classified Stream ................................................................................................................... 66
2.2.3.8.13 Short Stream .......................................................................................................................... 67
2.2.4 Function Classes ..................................................................................................................68
2.2.4.1 Properties with a Single Parameter ................................................................................................ 70
2.2.4.1.1 Function Class Switch .............................................................................................................. 71
2.2.4.1.2 Function Class Number ........................................................................................................... 72
2.2.4.1.3 Function Class Text ................................................................................................................. 74
2.2.4.1.4 Function Class Enumeration .................................................................................................... 74
2.2.4.1.5 Function Class BoolField ......................................................................................................... 75
2.2.4.1.6 Function Class BitSet ............................................................................................................... 76
2.2.4.1.7 Function Class Container ......................................................................................................... 76
2.2.4.2 Properties with Multiple Parameters ............................................................................................... 77
2.2.4.2.1 Function Class Record ............................................................................................................. 78
2.2.4.2.2 Function Class Array ................................................................................................................ 80
2.2.4.2.3 Function Class DynamicArray .................................................................................................. 83
2.2.4.2.4 Function Class LongArray ........................................................................................................ 86
2.2.4.2.4.1 MotherArray ...................................................................................................................... 86
2.2.4.2.4.2 ArrayWindow ..................................................................................................................... 87
2.2.4.2.4.3 Positioning an ArrayWindow on a MotherArray ................................................................. 90
2.2.4.2.4.4 Re-Synchronization of ArrayWindows ............................................................................... 93
2.2.4.2.5 Function Class Map ................................................................................................................. 94
2.2.4.2.6 Function Class Sequence Property .......................................................................................... 99
2.2.4.3 Function Classes for Methods ...................................................................................................... 100
2.2.4.3.1 Function Class Trigger Method .............................................................................................. 100
2.2.4.3.2 Function Class Sequence Method ......................................................................................... 101
2.2.5 Handling Message Notification .......................................................................................... 102
3 NETWORK SECTION .................................................................................................................. 106
3.1 Network Layer Service Specification ........................................................................................ 107
3.1.1 MOST Data ........................................................................................................................ 107
3.1.1.1 Control Data.................................................................................................................................. 108
3.1.1.2 Source Data .................................................................................................................................. 108
3.1.1.3 Distinction between Source Data and Control Data ...................................................................... 108
3.1.1.4 Differentiating Streaming Data and Packet Data .......................................................................... 108
3.1.1.5 Synchronous Data ........................................................................................................................ 108
3.1.1.6 Isochronous Data .......................................................................................................................... 109
3.1.1.7 Packet Data .................................................................................................................................. 110
3.1.2 Dynamic Behavior of a Device .......................................................................................... 111
3.1.2.1 Overview ....................................................................................................................................... 111
3.1.2.2 NetInterface .................................................................................................................................. 112
3.1.2.2.1 NetInterfacePowerOff ............................................................................................................ 113
3.1.2.2.2 NetInterfaceInit ....................................................................................................................... 113
3.1.2.2.3 NetInterfaceNormalOperation ................................................................................................ 118
3.1.2.2.4 NetInterface Ring Break Diagnosis ........................................................................................ 120
3.1.2.2.5 NetInterface Diagnosis Result ................................................................................................ 120
3.1.2.3 Power Management ...................................................................................................................... 121
3.1.2.3.1 Waking of the Network ........................................................................................................... 121
3.1.2.3.2 Network Shutdown ................................................................................................................. 122
3.1.2.3.3 Device Shutdown ................................................................................................................... 124
3.1.2.3.3.1 Performing Device Shutdown .......................................................................................... 124
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