Design Of High-speed Image Processing And Transmission System Based On DM648

Nowadays, China is becoming one of the most active areas of machine visiondevelopment with a great space for further growth. One of the development directions ofmachine vision is to construct a complete machine vision system independence fromcomputer support and participation. In practical application, as a means of sharinginformation, network is an essential function for embedded intelligent camera. Comparedwith existing interconnection modes, Ethernet is featured with easy networking, longtransmission distance and high transmission efficiency. With the development ofhigh-resolution high-frame-rate camera, however, commonly used10/100M Ethernet hasfallen short of application requirements. In terms of selection of processor chip, ARM,FPGA and DSP are commonly used. ARM chip finds it difficult to achieve real-time imageprocessing. FPGA chip requires users to develop IP core to achieve image processorinterface and Ethernet interface, combined with a low-grade system design. In order toovercome the two problems, this paper designs high speed image processing andtransmission system based on TMS320DM648.System design contains hardware circuit design and software program design.Hardware is divided into three modules. The first module is DSP minimum system designestablished upon DM648chip, including power circuit, clock, reset circuit, memory circuitand simulator circuit. The second module is Ethernet transmission module with88E1111as PHY chip that construct gigabit Ethernet together with network isolation transformerand RJ45interface. The third module is LED driving circuit with ARM chip as themicroprocessor to drive LCD module. DSP chip and ARM chip transmit data to bedisplayed through serial interface UART. The display module and Ethernet transmissionmodule are logically independent to facilitate later system upgrade. Software designcontains two parts. The first part DSP/BIOS-based driver development and network driverdesign and development at DSP end. The second part is LED module driver and serialcommunication programming with C language without operating system at ARM end. This paper completes the design, installation and debugging of the entire system.Actual running results show that this system can achieve Ethernet transmission at a gigabitrate and displays the user interface and character string at the same time. Display of userinterface is done by ARM chip while Ethernet communication is done by DSP. The presentsystem can be applied to prefix recognition system of counting machine so that theequipment can meet the requirements of high precision and high speed.