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【飞思卡尔】FlexRay™通信系统车内网络手册

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  • 日期: 2018-05-27
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标签: FlexRay通信系统

FlexRay™通信系统车内网络手册。

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LINCANRFFlexRay Technology InVehicle Networking freescalecomautomotive InVehicle Networking As an industry leader in automotive solutions Freescale Semiconductor has greatly contributed to invehicle networking by founding standards bodies offering an extensive portfolio of products to our customers and driving the development of nextgeneration products In the late 1990s Freescale was the only semiconductor manufacturer to be a founding member of the Local Interconnect Network LIN Cons......

LIN/CAN/RF/FlexRay™ Technology In-Vehicle Networking freescale.com/automotive In-Vehicle Networking As an industry leader in automotive solutions, Freescale Semiconductor has greatly contributed to in-vehicle networking by founding standards bodies, offering an extensive portfolio of products to our customers and driving the development of next-generation products. In the late 1990s, Freescale was the only semiconductor manufacturer to be a founding member of the Local Interconnect Network (LIN) Consortium. In September 2000, Freescale was one of only two semiconductor manufacturers to be founding members of the FlexRay™ Consortium. LIN/ SAE J2602 Low-speed, single-master, multiple-slave serial networking protocol. The LIN master node typically connects the LIN network with higher-level networks. Speed: Applications: Max. 20 Kbps Door Locks, Climate Control, Seat Belts, Sunroof, Lighting, Window Lift, Mirror Control CAN Multi-master asynchronous serial network protocol for high reliability control applications Speed: Max. 1 Mbps Applications: Body Systems, Engine Management, Transmission FlexRay Next-generation, deterministic and fault-tolerant network protocol to enable high-bandwidth, safety-critical applications Speed: Applications: Max. 10 Mbps per channel (dual channel) Drive-by-Wire, Brake-by-Wire, Advanced Safety and Collision Avoidance Systems, Steer-by-Wire, Stability Control, Camera-Based Monitoring Systems RF Radio frequency transmission, on/off keying or frequency shift keying modulation Frequency: Applications: 304 MHz to 915 MHz Remote Keyless Entry, Vehicle Immobilization, Passive Entry, Tire Pressure Monitoring Systems 2 www.freescale.com/automotive In-Vehicle Network Example Mirror WL LIN Lock Lock LIN Door Module WL Braking Suspension t Heater a e S r e w o P t Heater a e S r e w o P Steering f o o R CAN t a e S r e w o P r a e R Heater Heater ™ FlexRay FlexRay Braking Suspension Leveling Lights Flaps 1-10 Fan CAN Power Train Control Braking Controller Suspension Controller Steering Controller Lights Leveling CAN Climate Control Central Body Controller Dashboard Wiper FlexRay CAN FlexRay FlexRay Suspension Braking Door Module LIN Lock WL Suspension Braking The expansion of in-vehicle networking provides many system-level benefits over previous mechanical means, including: • Fewer wires required for each function, which reduces the size of the wiring harness and improves system cost, weight, reliability, serviceability and installation time • Additional functions can be added by making software changes, allowing greater vehicle content flexibility • Common sensor data available on the network so it can be shared, eliminating the need for multiple sensors Lights Wiper Lock Lights Mirror WL Lock Freescale Example of Total Vehicle Networking Solution www.freescale.com/automotive 3 LIN/SAE J2602 LIN is a universal asynchronous receiver-transmitter (UART)-based, single-master, multiple-slave networking architecture originally developed for automotive sensor and actuator networking applications. LIN provides a cost-effective networking option for connecting motors, switches, sensors and lamps in the vehicle. The LIN master node extends the communication benefits of in-vehicle networking all the way to the individual sensors and actuators by connecting LIN with higher-level networks, such as the controller area network (CAN). For a complete description of how LIN works, please visit www.freescale.com/automotive. Key Benefits • Enables effective communication for sensors and actuators where the bandwidth and versatility of CAN is not required • Complements CAN as a cost-effective sub-network • Synchronization mechanism means no quartz oscillator required at slaves • The LIN protocol can be generated by standard asynchronous communication interfaces (SCI, UART)—no specific hardware required • No protocol license fee Typical LIN Applications 1 2 3 4 Steering Wheel: Roof: Engine/Climate: Door/Seat: Cruise Control, Wiper, Turning Light, Climate Control, Radio Rain Sensor, Light Sensor, Light Control, Sun Roof Sensors, Small Motors, Control Panel (Climate) Mirror, Central ECU, Mirror Switch, Window Lift, Door Lock, Seat Position Motors, Occupant Sensors, Seat Control Panel 2 4 1 3 4 www.freescale.com/automotive Freescale’s Complete Portfolio of LIN Products Microcontrollers Freescale microcontrollers support LIN. Optimized LIN solutions include: XGATE coprocessor on S12(X) products, a combination of enhanced direct memory access (eDMA) + enhanced SCI (eSCI) on the MPC5500 family and SLIC on HC08/S08 MCUs. System Base Chip (SBC) Monolithic IC combining many functions found in standard microcontroller based systems, such as power management, communication interface, system protection and diagnostics LIN Enhanced Physical Interface Physical layer component dedicated to automotive LIN sub-bus applications (MC33661) System in a Package (SiP) or Intelligent Distributed Control (IDC) solutions Embedded microcontroller and power management in a single package, providing a highly integrated slave node solution for space-constrained areas, such as seats and door modules (MM908E624) Slave LIN Interface Controller (SLIC) Enables Higher Integration Freescale offers an exceptional embedded SLIC module that automates LIN message handling to help increase performance while reducing development time and cost. It allows you to devote more CPU to the application and gives you the ability to use ROM devices or state machines. SLIC helps increase performance in several ways. True auto-synchronization and auto-bauding find LIN frames and automatically adjust the baud rate without CPU intervention. SLIC reduces interrupt processing up to 83 percent over UART solutions with only two interrupts for any message. This makes it possible to use SYNCH data from messages to trim the oscillator. SLIC also eliminates many steps normally required by UART solutions (trim oscillator, detect break, measure sync signal, adjust baud rate, calculate and verify checksum, handle individual data bytes, detect errors and more). SLIC helps reduce development time by eliminating message processing steps, simplifying and minimizing driver code to as small as 120 bytes (refer to Freescale’s Application Note AN2633). Minimized driver code translates into shortened debug and development time, which enables you to use your engineering time to debug the application rather than LIN communication. SLIC helps reduce cost by using only one software driver to handle any LIN speed on any LIN bus. This allows significant code reuse for many applications, regardless of LIN bus speed. No reprogramming is required to change bus speeds, which equates to fewer part numbers to track and stock. High-speed (up to 120 Kbps) end-of-line programming through LIN allows faster module manufacturing times and field reprogrammability. Also, smaller driver code means less flash is required for LIN communication, resulting in more flash available to use for product applications. SLIC does not require oscillator trimming, unlike UART, which simplifies the design. SLIC emphasizes hardware as an alternative to software message processing and exemplifies Freescale’s technical leadership in LIN communication innovation. Intelligent Distributed Control Solutions The Freescale MM908E6xx family is a highly integrated System in a Package (SiP) solution that includes an HC08 high-performance microcontroller with a SMARTMOS™ analog control IC packaged in a 54-lead small-outline integrated circuit (SOIC). These solutions allow for a very small footprint and simple PCB design. The IDC solutions will replace many discrete ICs, reducing complexity, improving quality and decreasing manufacturing and logistics costs. History Automotive networking has always relied on standardized serial communications hardware, but it was rarely compatible. In the late 1990s, the LIN Consortium was founded by five European automakers, Volcano Automotive Group and Freescale (at the time Motorola) to solve this problem. The first fully implemented version of the new LIN specification was published in November 2002 as LIN version 1.3. In September 2003, version 2.0 was introduced to expand configuration capabilities and make provisions for significant additional diagnostics features and tool interfaces. Some North American automakers were concerned about the rising complexity and lack of direct North American representation in the LIN Consortium. As a result of their concerns, a Society of American Engineers (SAE) task force, which was part of the committee that standardizes vehicle networking, was formed to help ensure LIN 2.0 was suitable for global implementation. Although a full consensus was never reached, the task force published the SAE J2602 Recommended Practice for LIN Networks document, which seeks to fully specify ambiguities and optional features of the LIN 2.0 specification. Since the SAE J2602 recommended practice is still based upon LIN 2.0 and the protocol and physical layer specifications are fundamentally the same, many of the generic MCU-based hardware solutions can work on either type of network. Freescale Semiconductor and LIN—As the only semiconductor manufacturer on the steering committee of the of the LIN Consortium, Freescale Semiconductor has the industry’s most advanced range of devices, components, software, tools and support available. www.freescale.com/automotive 5
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