🗊Презентация Lin protocol description. Automotive body network

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Lin protocol description. Automotive body network, слайд №1Lin protocol description. Automotive body network, слайд №2Lin protocol description. Automotive body network, слайд №3Lin protocol description. Automotive body network, слайд №4Lin protocol description. Automotive body network, слайд №5Lin protocol description. Automotive body network, слайд №6Lin protocol description. Automotive body network, слайд №7Lin protocol description. Automotive body network, слайд №8Lin protocol description. Automotive body network, слайд №9Lin protocol description. Automotive body network, слайд №10Lin protocol description. Automotive body network, слайд №11Lin protocol description. Automotive body network, слайд №12Lin protocol description. Automotive body network, слайд №13Lin protocol description. Automotive body network, слайд №14Lin protocol description. Automotive body network, слайд №15Lin protocol description. Automotive body network, слайд №16Lin protocol description. Automotive body network, слайд №17Lin protocol description. Automotive body network, слайд №18Lin protocol description. Automotive body network, слайд №19Lin protocol description. Automotive body network, слайд №20Lin protocol description. Automotive body network, слайд №21Lin protocol description. Automotive body network, слайд №22Lin protocol description. Automotive body network, слайд №23Lin protocol description. Automotive body network, слайд №24Lin protocol description. Automotive body network, слайд №25Lin protocol description. Automotive body network, слайд №26Lin protocol description. Automotive body network, слайд №27Lin protocol description. Automotive body network, слайд №28Lin protocol description. Automotive body network, слайд №29Lin protocol description. Automotive body network, слайд №30Lin protocol description. Automotive body network, слайд №31Lin protocol description. Automotive body network, слайд №32Lin protocol description. Automotive body network, слайд №33Lin protocol description. Automotive body network, слайд №34Lin protocol description. Automotive body network, слайд №35Lin protocol description. Automotive body network, слайд №36Lin protocol description. Automotive body network, слайд №37Lin protocol description. Automotive body network, слайд №38Lin protocol description. Automotive body network, слайд №39Lin protocol description. Automotive body network, слайд №40
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LIN protocol description
Описание слайда:
LIN protocol description

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Automotive Body Network
Описание слайда:
Automotive Body Network

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Typical LIN Applications
Описание слайда:
Typical LIN Applications

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MUX Standards (Costs and Speeds)
Описание слайда:
MUX Standards (Costs and Speeds)

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LIN Consortium Consortium formed in 1998. Five Car manufacturers ONE Semiconductor Supplier (Motorola) One tool Supplier (VCT) Specification finalised on 02/02/00 Official Launch at SAE March ‘00 Open Specification. Motorola Ready to support LIN with extensive device families and new parts already in the discussion/ spec finalization loop. First dedicated LIN part available Q3 ‘00
Описание слайда:
LIN Consortium Consortium formed in 1998. Five Car manufacturers ONE Semiconductor Supplier (Motorola) One tool Supplier (VCT) Specification finalised on 02/02/00 Official Launch at SAE March ‘00 Open Specification. Motorola Ready to support LIN with extensive device families and new parts already in the discussion/ spec finalization loop. First dedicated LIN part available Q3 ‘00

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LIN Standard - Overview
Описание слайда:
LIN Standard - Overview

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Hierarchical Network Structure
Описание слайда:
Hierarchical Network Structure

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Sub-Network: LIN vs. CAN
Описание слайда:
Sub-Network: LIN vs. CAN

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SubNets Necessary to reduce Busload on main Bus Solutions CAN Automotive Standard Bus Compatible with Main Bus Expensive (Die Size/ Dual Wire) Serial Sub Bus no standard Bus System not compatible with Main Bus inexpensive SCI-Based: Interface exists even on cheap devices Interface can easily be reconstructed by ASIC or CPLD
Описание слайда:
SubNets Necessary to reduce Busload on main Bus Solutions CAN Automotive Standard Bus Compatible with Main Bus Expensive (Die Size/ Dual Wire) Serial Sub Bus no standard Bus System not compatible with Main Bus inexpensive SCI-Based: Interface exists even on cheap devices Interface can easily be reconstructed by ASIC or CPLD

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Sub Bus Concept Basic Requirements: Satisfy Need for a Standard for Sub Busses Cost driven: The solution must be cheaper than CAN Reliability: Same Level as CAN expected Long Term Solution Logical Extension to CAN Scalable: Capability to extend Systems with additional nodes Lowering Cost of Satellite nodes: No Crystal or Resonator Easy implementation Simple State Machines Low Reaction Time (100 ms max) Predictable Worst Case Timing
Описание слайда:
Sub Bus Concept Basic Requirements: Satisfy Need for a Standard for Sub Busses Cost driven: The solution must be cheaper than CAN Reliability: Same Level as CAN expected Long Term Solution Logical Extension to CAN Scalable: Capability to extend Systems with additional nodes Lowering Cost of Satellite nodes: No Crystal or Resonator Easy implementation Simple State Machines Low Reaction Time (100 ms max) Predictable Worst Case Timing

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Lin protocol description. Automotive body network, слайд №11
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Master / Slave Protocol Master Task Determines order and priority of messages. Monitors Data and check byte and controls the error handler. Serves as a reference with its clock base (stable clock necessary) Receives Wake- Up Break from slave nodes Slave Task Is one of 2-16 members on the bus Receives or transmits data when an appropriate ID is sent by the master. The node serving as a master can be slave, too!
Описание слайда:
Master / Slave Protocol Master Task Determines order and priority of messages. Monitors Data and check byte and controls the error handler. Serves as a reference with its clock base (stable clock necessary) Receives Wake- Up Break from slave nodes Slave Task Is one of 2-16 members on the bus Receives or transmits data when an appropriate ID is sent by the master. The node serving as a master can be slave, too!

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Master / Slave Protocol Master has control over the whole Bus and Protocol The master controls which message at what time is to be transferred over the bus. It also does the error handling. To accomplish this the master sends Sync Break sends Sync Byte sends ID-Field monitors Data Bytes and Check Byte, and evaluates them on consistance receives WakeUp Break from slave nodes when the bus is inactive and they request some action. serves as a reference with it’s clock base (stable clock necessary)
Описание слайда:
Master / Slave Protocol Master has control over the whole Bus and Protocol The master controls which message at what time is to be transferred over the bus. It also does the error handling. To accomplish this the master sends Sync Break sends Sync Byte sends ID-Field monitors Data Bytes and Check Byte, and evaluates them on consistance receives WakeUp Break from slave nodes when the bus is inactive and they request some action. serves as a reference with it’s clock base (stable clock necessary)

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Master/Slave Protocol Slave Is one of 2-16 Members on the Bus and receives or transmits Data when an appropriate ID is sent by the master. Slave snoops for ID. According to ID, slave determines what to do. either receive data or transmit data or do nothing. When transmitting the slave sends 1, 2, 4, or 8 Data Bytes sends Check-Byte The node serving as a master can be slave, too!
Описание слайда:
Master/Slave Protocol Slave Is one of 2-16 Members on the Bus and receives or transmits Data when an appropriate ID is sent by the master. Slave snoops for ID. According to ID, slave determines what to do. either receive data or transmit data or do nothing. When transmitting the slave sends 1, 2, 4, or 8 Data Bytes sends Check-Byte The node serving as a master can be slave, too!

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LIN protocol offers message timing predictability Time Triggered Approach Message Length is known Number of transmitted data bytes is known minimum length can be calculated Each Message has length budget of 140% of it’s minimum length maximum allowed length is known distance between beginning of two messages
Описание слайда:
LIN protocol offers message timing predictability Time Triggered Approach Message Length is known Number of transmitted data bytes is known minimum length can be calculated Each Message has length budget of 140% of it’s minimum length maximum allowed length is known distance between beginning of two messages

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Data Transmission
Описание слайда:
Data Transmission

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Message Frame Synch Byte: Specific Pattern for Determination of Time Base (Determination of the time between two rising edges) A Synch Byte precedes any Message Frame ID-Field: Message Identifier: Incorporates Information about the sender, the receiver(s), the purpose, and the Data field length. Length 6 Bit. 4 classes of 1/2/4/8 Data Bytes. The length coding is in the 2 LSB of the ID-Field. Each class has 16 Identifiers. A total of 64 Message Identifiers are possible. 2 Parity Bits protect this highly sensitive ID-Field.
Описание слайда:
Message Frame Synch Byte: Specific Pattern for Determination of Time Base (Determination of the time between two rising edges) A Synch Byte precedes any Message Frame ID-Field: Message Identifier: Incorporates Information about the sender, the receiver(s), the purpose, and the Data field length. Length 6 Bit. 4 classes of 1/2/4/8 Data Bytes. The length coding is in the 2 LSB of the ID-Field. Each class has 16 Identifiers. A total of 64 Message Identifiers are possible. 2 Parity Bits protect this highly sensitive ID-Field.

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Identifier The identifier field is sent by the master node to all LIN nodes This identifier normally contains one of 64 different values and includes 2 parity bits in the 8 bit data The identifier is normally associated with a collection of signals that are subsequently transmitted on the LIN bus In a specific case this can initiate SLEEP mode in the LIN slave nodes – in this case no further data is transmitted on the LIN bus
Описание слайда:
Identifier The identifier field is sent by the master node to all LIN nodes This identifier normally contains one of 64 different values and includes 2 parity bits in the 8 bit data The identifier is normally associated with a collection of signals that are subsequently transmitted on the LIN bus In a specific case this can initiate SLEEP mode in the LIN slave nodes – in this case no further data is transmitted on the LIN bus

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LIN Message Frame
Описание слайда:
LIN Message Frame

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LIN Communication - Data from Slave to Master
Описание слайда:
LIN Communication - Data from Slave to Master

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LIN Communication - Data from Master to Slave(s)
Описание слайда:
LIN Communication - Data from Master to Slave(s)

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LIN Communication - Data from Slave to Slave
Описание слайда:
LIN Communication - Data from Slave to Slave

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LIN Message Frame
Описание слайда:
LIN Message Frame

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Frame Synchronisation (1)
Описание слайда:
Frame Synchronisation (1)

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Frame Synchronisation (2)
Описание слайда:
Frame Synchronisation (2)

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Bit-Synchronisation A start bit transition to a low logic level (dominant) indicates a start of a byte, least significiant first and completing with a logic high level (resessive) bit to indicate the STOP bit
Описание слайда:
Bit-Synchronisation A start bit transition to a low logic level (dominant) indicates a start of a byte, least significiant first and completing with a logic high level (resessive) bit to indicate the STOP bit

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Bit Sampling
Описание слайда:
Bit Sampling

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Bit-Synchronisation
Описание слайда:
Bit-Synchronisation

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Taking account of Ground-Shift
Описание слайда:
Taking account of Ground-Shift

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LIN Physical Interface
Описание слайда:
LIN Physical Interface

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Examination of whether the Deadline is met
Описание слайда:
Examination of whether the Deadline is met

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Message latency
Описание слайда:
Message latency

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Message latency across a network
Описание слайда:
Message latency across a network

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Latency optimisation with LIN
Описание слайда:
Latency optimisation with LIN

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Variables Scheduling
Описание слайда:
Variables Scheduling

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Event Triggered Message Problem Specific node communication required but this takes up too much time for all network messages Solution : Event Triggered frame: Header is sent out normal case: no answer Rare response: only one node responds Very rare response : several nodes respond simultaneously Cases 1 and 3 are exceptions that should be addressed at the application design. Event triggered messaging is complementary to the regular signal based messaging scheme
Описание слайда:
Event Triggered Message Problem Specific node communication required but this takes up too much time for all network messages Solution : Event Triggered frame: Header is sent out normal case: no answer Rare response: only one node responds Very rare response : several nodes respond simultaneously Cases 1 and 3 are exceptions that should be addressed at the application design. Event triggered messaging is complementary to the regular signal based messaging scheme

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Further information http://www.lin-subbus.org
Описание слайда:
Further information http://www.lin-subbus.org

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LIN Development Flow
Описание слайда:
LIN Development Flow

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LIN Configuration Description File Includes all essential information of network signals, latency periods, cycle times, nodes affected Input file serves as a development interface for a node LIN Application Generator LIN-Emulator LIN Analyser
Описание слайда:
LIN Configuration Description File Includes all essential information of network signals, latency periods, cycle times, nodes affected Input file serves as a development interface for a node LIN Application Generator LIN-Emulator LIN Analyser

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The Workflow Data Input Definition of objects Definition of relations between the objects Data Processing Signal Packing (Frame Editor/Frame Compiler) Timing Analysis Data Output Configuration file generation Various optional customer-defined post-operations
Описание слайда:
The Workflow Data Input Definition of objects Definition of relations between the objects Data Processing Signal Packing (Frame Editor/Frame Compiler) Timing Analysis Data Output Configuration file generation Various optional customer-defined post-operations

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