The Design And Realization Of Network Full-Color Landscaped Light Control System Based On SOPC

Recently.LED as an important part in Semiconductor field, has attracted widespread attention for its significant advantages in performance、energy efficiency and long used life. About Landscape lighting control technology, our country has large gap behind foreign. Usually, the mainstream products of controller of about Landscape lighting control system on the market are achieved by Microcontroller and ARM, however, their shortage in control speed and hardware resources make them hard to meet the complicated control requirements of large-scale landscape lighting control system. This paper designed a full-color landscape light network control system based on SOPC to overcome the shortcomings and deficiencies of the traditional control method.In this paper, at first, we analyzed the function of full-color landscape and the driving principle of LED; then discussed the advantages and the disadvantages of different system control structure and different lighting control transmission protocols; And finally, this paper determined the system control scheme,which consists of three parts from top to down, the host computer, the network node controller and the LED driver.The host computer is developed on Visual Studio C++platform;The network node controller is developed based on the Nios II embedded in FPGA. The driver part is developed based on PWM. The signal transmission between the host computer and the node controller is based on DMX512protocol.The signal transmission between the node controller and LED is based on DMX512protocol.After determined the control scheme,This paper described the design process of network node controller from hardware to software.In hardware side,we builded SOPC hardware system based on the Nios Ⅱ processor, and some basic peripherals are added to the SPOC system.besides.we also add DM9000A IP core and DMX512signal IP core which is designed by ourselves to the SOPC system.In software side, we firstly cut the μC/OSⅡ operating system and transplanted the Lwip protocol based on μC/OSⅡ and then developed the application software.As for the LED driver, we designed a decoder for full-color LED, and finished the design of power supply circuit and control circuit.For the communication section,we introduce communication principle between the host computer and the network node controller, and designed a control interface for the host computer.Finally.we tested the system which we design and make some conclusions and prospects.