Study And Implementation Of Electric Car Air Conditioning Electronic Control System Based On Nios Ⅱ

Global warming, rising energy costs, environmental pollution is widely focused inthe world. Electric vehicles to power as the driving force, has gradually become thefuture direction of development of the automotive industry since the number ofadvantages like high efficiency, zero emissions. With the rapid development of electricvehicles, electric vehicle’s air conditioning system is more and more widespread concernfor the auto companies. Traditional automotive air-conditioning control system controlfunctions have been unable to meet the needs of the people, the author designed a NiosII-based pure electric vehicles air-conditioning control system to improve existingelectric vehicle air conditioning controller function single automation integration R&Din this paper.The system uses a flexible and efficient SOPC (System on a Programmable Chip)technology, the Nios II processor, memory, I/O port, LVDS functional modulesembedded into an FPGA to achieve the control function of the electric vehicle airconditioning.By analysis of the demand for air-conditioning systems, chip selection on the FPGAchip, external memory, SRAM and Flash chips, temperature sensors, and studiesdemonstrate the overall design of a system. Altera Corporation Quartus II9.0hardwaredevelopment tools, the Nios II IDE9.0software development tools and C languagedevelopment and debugging of system hardware and software to complete the design ofthe system. On this basis, the paper details the Nios II soft-core CPU, SRAM memorycontroller, Flash controller, JTAG controller, temperature acquisition module, the DCcompressor speed control module, LCD display modules and other hardware andsoftware development process and the realization of the program, and simulation waveform of each unit module and system debugging. The results show that the FPGAautomotive air-conditioning control system as the main controller chip, compared withthe traditional controller, have the advantages of portability, flexible and efficient, shorterdesign cycles, line programmable; and future car radio function of the navigation, MP3and other electronic products with embedded FPGA chip, is conducive to theminiaturization of the design, while reducing the cost of the vehicle, to save space for theinterior of the car.Finally, based on the study, the author summarized and analyzed the characteristicsof the system and mentioned the prospect of the system.