The Design And Implementation Of LED Landscape Lighting Control System

Landscape lighting is an outdoor lighting project with functions of lighting, Art Deco and beautifing the environment. With low power consumption, long life, high brightness RGB LED display to join, landscape lighting system is more widely used in high-rise buildings, parks, city squares, bridges, amusement parks and other places. With the changing application requirements, LED landscape lighting system gradually towards a large-scale, networked, intelligent direction.Currently single ARM processor or FPGA as the core of control system on the market gradually can not meet the development trend of LED landscape lighting system. Single ARM processor as the core of control system, it is difficult to achieve synchronous parallel display of large-scale LED landscape lighting system. And single FPGA as the core of control system, because the control ability of FPGA are relatively weak, and to achieve the network function is relatively complex, so that to achieve large-scale LED landscape lighting system is difficult.For the above problems, this paper considers a scheme, combined with the use of ARM processor and FPGA. Using ARM processor as the main control chip and the Linux operating system in order to achieve a strong network and intelligent. And the FPGA as the LED data output unit, to achieve synchronous parallel display of large-scale RGB LED.The LED landscape lighting control system consists of host controller and slave controller. Host controller and slave controller concatenated together using a Daisy chain through the network, in order to meet the various buildings look and commercial appeal. Host controller uses ARM CortexTM-A8 processor and Linux operating system, to distribute large-scale RGB LED display data to the respective slave controller. Slave controller uses architecture of ARM9+ FPGA, receive data from host controller and to achieve synchronous parallel display of RGB LED. The results show that the design fully combine the advantages of both the ARM processor and FPGA and increase the processing speed, real-time and flexibility of the system, to meet the development trend of LED landscape lighting system.