Based On The The Tms320dm6446 Cotton Detect Hardware System Design

Detection of foreign fibers production throughout the cotton industry occupies an important position. Cotton impurities on the quality of cotton produced great influence; if not to sort their removal would seriously affect the quality of products related to cotton, thus affecting the interests of the entire cotton industry. Under the current technology, this paper based on digital image processing technology in the field of industrial inspection applications, combined with cotton detection system for low-cost, high-demand intelligence, a high-performance DSP based on TI dual-core chips TMS320DM6446 cotton testing system hardware design.This system is typical of high-speed circuit, the PCB design process in the system, we have to face high-speed interconnect design reflection, crosstalk, damped oscillations and the system interconnect timing delay caused by a series of signal integrity (Signal Integrity, called SI) issues. Solve the signal integrity issue is the system the key to success. With the help of powerful Cadence software design before the high-speed signal lines for signal integrity analysis, and constraint rules formulated according to the simulation results, reducing the influence of the phenomenon of signal integrity. Signal Integrity Design proved to shorten the design cycle, with good theoretical and practical significance.This combination of system functional requirements of the first analysis of its performance around the selected DSP processors, the completion of the cotton test schematic design of the hardware system, including the minimum hardware system design, video interface and communication interface; went on to discuss the system possible signal integrity issues, and to determine the system's key high-speed signaling network. Theory based on signal integrity, simulation using Cadence software tools SPECCTRAQuest critical network simulation and analysis, and to take measures to curb the phenomenon of possible signal integrity, combined with simulation results obtained the required number of PCB design constraints rule conditions; Finally, use Cadence Allegro tools for PCB design, added the simulation shows before routing, and completed PCB layout under the constraints, after routing using SPECCTRAQuest tools of simulation work to verify the system requirements to meet the signal integrity.Complete the cotton test PCB hardware system design.