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This paper presents the worst case network situation and the analyzed result for timing test on real embedded system. Timing is critical fact in a specific network. As the needs that vehicle is more intelligence, electrical components of vehicle are more enhanced and complicated. The number of electronic control units (ECUs) which are set up at vehicle is significantly increased. Therefore there is...
ldquoOpen Systems and their interfaces to electronics in Motor Vehiclesrdquo (OSEK) is a real-time operating system used in vehicle systems. OSEK is a standard operating system used by many carmakers. OSEK has a network management algorithm, OSEK network management (OSEK NM). It has two management rules: Direct NM and Indirect NM. Direct NM and Indirect NM are implemented in two network protocols...
This paper describes a practical training course for engineering students on embedded systems that are based on electronic control units (ECU) that use the Freescale HCS12 microcontroller. An evaluation board was designed as a single platform for academic purposes and it was implemented with a Freescale HCS12 microcontroller, sensors, a motor, an LED module, and communication modules. Among many microcontrollers,...
As the complexity of automotive networks systems increased, network management mechanisms becoming more important. Although OSEK/VDX includes network management (NM), it is too expensive to use in all ECUs. Since some electronic control units (ECUs) provide only simple functionality, they do not need to use the whole range of OSEK/VDX functions. In this case, OSEK/VDX causes unnecessary overhead....
There are many embedded systems in the environment. Users are demanding increasingly advanced embedded systems. For these reasons, embedded systems have became more complicated and require a lot of time for designing. Model-based programming has came into the spotlight in the embedded system industry that demands short time-to-market, especially in the automotive industry. Model-based programming...
The gateway system is an essential component to communicate network-to-network with different protocols inside a distributed system. The reliability of the automotive gateway system is very important because it is a safety-critical system. Therefore, we propose a method of improving the reliability of the gateway system by using OSEK/VDX. We consider two factors for improving the reliability of the...
In real-time systems such as automotives, a distribution system is used to increase the reliability of the system. As the demand and complexity of the distribution system have increased, several automotive communication protocols have been introduced such as LIN, CAN, and FlexRay. Each node of the system chooses the communication protocol that is suitable for the specific purpose. Each node doesn't...
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