Since its birth more than 100 years ago, the car has gradually evolved from people's mobility tools to the continuation of life and entertainment space. As cars become a necessity in most people's lives, modern smart cars are safer, more comfortable and more convenient. With the help of many electronic devices, it is ready to come out. Information entertainment systems and telematics control systems are increasingly being used in automobiles in this market demand. This article refers to the address: http:// In addition to the well-known GPS for positioning, wireless networks such as WIFI, Bluetooth and 3G are also widely built into the system, allowing cars and mobile phones and other networked terminal devices to be connected at any time, and connected to a dedicated customer service network. Even with the Internet anytime, anywhere access. Navigation is a basic function that customers can enjoy. It is assisted by GPS and intelligent network driving system. It relies on cellular network for information retrieval, real-time traffic navigation and any other Internet interconnection application. More and more new cars can already integrate global positioning. System navigation technology, vehicle-to-vehicle communication technology, wireless communication and remote sensing technology to achieve manual driving and automatic driving compatibility. On the other hand, relying on advanced sensing technology, it can instantly determine the real-time situation of the road ahead of the vehicle. Combined with the latest network traffic data, it can not only help the owner choose the most suitable route, but also respond to emergency situations. The unfavorable situation, which makes the vehicle safer and more punctual. There has also been a lot of changes in in-car entertainment, from the initial music and radio, to digital TV and digital broadcasting. Since you are always online, downloading songs or movies online, or listening to or watching online is no different from the experience on your PC. Full-format, high-definition decoding capabilities have also made cars a mobile cinema. From the perspective of the user interface, the touch screen and 3D graphics applications give customers a strong animated 3D visual experience. The application of speech recognition and speech synthesis technology allows the driver to control the system while driving, switching content and enabling voice and short message communication. Due to the existence of networking, in addition to listening to Internet radio stations, watching instant news on Internet TV, and tracking the stock market's real-time market has become a basic function. Customers can also use the voice command media to play, find songs, answer calls, dial numbers, return short messages, and more. Customers can also access the customer call center with one click, requiring navigation destinations, service hotspots, remote applause diagnostics, emergency repair services, and more. Through the car dashboard touch screen, inquire and book the favorite restaurants, and arrive at the restaurant location under the car, the increasingly smart car is giving the car owners a different driving experience. More applications mean more stringent functional requirements for electronic products. From the trend of functions and performance, the demand for in-vehicle infotainment systems and portable computers and high-end handheld devices is similar, which requires the CPU of the in-vehicle system to have more than 800MHz. The frequency, there is a fast enough external bus and memory, and there is enough storage space. Even in portable and desktop applications, the complexity of such a system is already high. What's more, in the automotive environment, due to the high quality requirements of customers, due to the stringent requirements of electromagnetic compatibility, power consumption, real-time and power consumption of automotive products, the design difficulty of in-vehicle infotainment systems has reached an unprecedented height. On the other hand, the complexity of the design of in-vehicle infotainment systems is largely due to the complexity of the software. Most of the new system features rely on a lot of development work on embedded software. In other parts of the car (such as engine controllers), the difficulty lies in algorithms, real-time, and high reliability. In-vehicle infotainment system, in addition to algorithms (voice recognition and synthesis, etc.), real-time (must be able to respond to customer input immediately), high reliability (can not have crashes, can not read content, etc.), and high compatibility (various numbers Music and movie formats, various web formats, various e-book file formats, various communication protocols), high ease of operation (voice interaction, touch screen button settings, 3D graphics to be cool and concise), maintainability (online download updates) The software is used to install new features or patches). Figure 1: Picture of the car smart terminal The iMX536 is a processor that meets automotive-grade standards for the automotive industry. It has a large number of interfaces, and its core processor, which is used as the intelligent terminal of the Internet of Vehicles, meets the standards of the new generation of the Internet of Vehicles industry. It can not only meet the requirements of the after-installation entertainment market, such as 1080P decoding, multi-channel VGA, multi-screen vision, navigation, 3G, Bluetooth, WIFI, but also to meet the real-time car conditions of the pre-installation market, driving record, HD multi-camera car Video surveillance, DVR, Beidou GPS intelligent navigation, voice recognition, vehicle interface detection, CAN, RS485, RS232, RFID modules and other indicators. Figure 2: Schematic diagram of the iMX536 vehicle system Chenhan Electronics adopts iMX536 processor. After more than one year of development, it has completed the GPS pre-installed GPS video terminal solution that meets the new national standard. The current product plan has entered the Ministry of Public Security's national standard certification system. The launch of this product has greatly enhanced the intelligent level of the domestic intelligent vehicle terminal industry, and has created a solid core for building a new generation of vehicle networking systems.
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