Multi core embedded processing technology promotes

2022-05-17
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Multi core embedded processing technology promotes the development of automotive technology

in the past 40 years, the semiconductor industry has made rapid development in integration. Last year was the 40th anniversary of Moore's law. In most cases, Moore's law also applies to other areas that try to achieve rapid expansion through technology in the short term. An example cited in the 2005 SIA annual report can well illustrate the impact of the model of the semiconductor industry on daily life: "in 1978, the business flight from New York to Paris took seven hours and the ticket price was $900. If Moore's law was applied to the aviation industry, the ticket cost would only be about 1p and the flight time would not exceed 1s." Obviously, the aviation industry is reluctant to adopt Moore's law, but many other industries try to apply this law

the automotive industry has benefited greatly from the development of embedded processing technology. Some vehicles now use up to 60 processors. The demand for new automotive functions is increasing, which in turn further promotes the demand for higher system performance and reliability. The development of engine technology and the final "environmentally friendly vehicle" need new methods to solve a large number of technical problems. Semiconductors will play a more and more important role in solving a large number of electrical technical problems by using higher power semiconductors, new memory technology, stronger embedded processor performance and timing control function. The new semiconductor technology will create new opportunities for solving the existing technical problems in the automotive electronics industry. The 32-bit microcontroller currently used in the automotive industry contains more than 30 million transistors, and it may increase rapidly to more than 60 million in the next few years. With the continuous improvement of system integration in the next few years, it is necessary to develop new technologies in order to make full use of all functions of semiconductors in increasingly complex systems. The progress of semiconductor technology has realized new functions that people could not imagine 10 years ago. A new type of real-time multi-core debugging, calibration and loop hardware interface is meeting the special requirements of advanced engine powertrain system

in the past 30 years, some people have tried to use cylinder deactivation. With the rise of fuel prices and the emergence of powerful embedded processors, automobile manufacturers and end users begin to look at cylinder stopping technology with new eyes. The embedded processor is used to control the engine timing to balance the torque and fuel economy of the powertrain system

from light vehicles to heavy trucks, various powertrain applications will use clean and environmentally friendly engines. Government regulations in some areas will make the engine cleaner and more environmentally friendly. The method of using direct fuel injection and weighing into the cylinder and particulate trap in carats to remove the exhaust device will require extremely advanced timing control of the fuel injection nozzle and sensor (detecting the status of the particulate trap)

to solve these problems, new methods are needed to enable the engineering design team to adopt new features with shorter time to market, lower cost, higher reliability and increasing number. In the automotive market, the embedded control for engine management has a set of very complex electromechanical system requirements. Changes in customer expectations and government regulations are driving changes in engine management. The development of engine technology to lean burn engine, camless engine and electronic hybrid vehicle will have a direct impact on the electronic components of powertrain system of future vehicles. Stepless speed change will play an important role in powertrain system in the future, and new microcontroller technology and semiconductor solutions will become the main driving force to turn new technology into reality

Figure 1 shows the complexity of engine management. The block is developed into a coexistence of multiple control modes. The diagram shows a common engine control system with multi-channel input and multi-channel output equipment. These inputs will generate different levels of interrupts and exceptions according to the impact on the large-scale system. The output equipment can be pulse width modulation (PWM), general input/output or timing input/output

when debugging and calibrating electromechanical systems, real-time debugging is very critical, because electromechanical systems usually do not allow the performance of embedded processors to be modified or interrupted so that development tools can query. Today's system engineers can take advantage of more advanced development tools. These improvements were even unimaginable a few years ago

in order to solve the problem of how to track data and instructions in real time between multiple processor core types, ieee-istonexus5001consortium or nexusforum has been established in the industry. Nexus forum first released the technical specification in 1999 and updated it in 2003

nexus 5001 technical specification includes some standard functions, using non-invasive debugging technology to set break points and observation points for data and instructions. The technical specification will deploy a variety of unique features to track the most serious software and hardware failures. Some of the new functions include: tracking information processing, data tracking, memory replacement, port replacement, program tracking, timeout and error message processing. For many years, although many functions have been deployed in microprocessors, there is no processor with all functions and real-time debugging interface

the calibration and commissioning methods used in the past 10 years use the concept system of "every cycle must be viewed" in the process of commissioning and calibrating the powertrain system. Nexus5001 method makes the following four assumptions about the debugging situation, avoiding the practice of "having to view each cycle"

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