DDC controller and data processing method based on FPGA

Abstract

The present invention discloses a DDC controller and a data processing method based on a FPGA, used for improving the stability of a system, reducing power consumption and relieving the burden of a processor. The DDC controller based on the FPGA comprises an on-chip system established by the FPGA, a random access memory SRAM, a script memory, a multi-path RS485 level converter, a real-time clock,a DI / DO circuit, an AI / AO circuit, a TCP / IP network interface and a FPGA configuration circuit. The on-chip system established by the FPGA comprises a NIOS processor, a multi-path hardware PID, a watchdog circuit WD, an I2C communication interface, a SPI communication interface and a multi-path RS485 serial communication interface. The random access memory SRAM provides code and data storage space(s). The script memory stores script(s). The DI / DO circuit performs signal conversion and isolation. The FPGA configuration circuit reconstructs a SOPC system and completes the transfer and guidanceof control code(s) when the system is powered on. The NIOS processor performs the translation and execution of the script(s) and data communication, the NIOS processor communicates with an A / D and D / Aconversion circuit via the SPI communication interface, and the NIOS processor communicates with the TCP / IP network interface via the SPI communication interface.

Description

technical field [0001] The invention relates to the field of DDC controllers, in particular to an FPGA-based DDC controller and a data processing method. Background technique [0002] Direct Digital Control (DDC) is a dedicated controller that meets the needs of Building Automation System (RTU), and is mainly used to control air conditioners, valves and water pumps in buildings. The existing DDC has the following characteristics: the basic application function program is solidified internally, which is easy to use and easy to maintain, but it can only complete the control of the control object with relatively simple functions, the program mode is relatively fixed, and the flexibility is poor; the existing DDC system has many host computer software It is a dedicated software, and the compatibility of different products is poor; the existing DDC system software is expensive; the existing DDC hardware system has a small number of expansion module ports or complex circuits. SU...

AI Technical Summary

Problems solved by technology

The existing DDC has the following characteristics: the basic application function program is solidified inside, which is easy to use and easy to maintain, but it can only complete the control of relatively simple control objects, the program mode is relatively fixed, and the flexibility is poor; the existing DDC system has many upper computer software It is a special software, and the compatibility of different products is poor; the existing DDC system software is expensive; the existing DDC hardware system has a small number of expansion module ports or complex circuits

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