Design Of Multi-Channel Signal Processing Platform Based On OMAP-L138

In recent years, with the rapid development and wide application of embedded technology and information technology, digital signal processing technology has been widely used in the field of industrial control, mobile communications, home appliances.Signal processing platform is the basis for signal processing. To sum up, the solutions to general signal processing platform here are as follows:PC processing platform, virtual instruments, embedded DSP systems and so on. However, there are many reasons for limiting its application. It can not or is difficult to embed operating system and implement the management of files. Besides, it doesn't provide the connection to several kinds of interface and Internet. It has limitations on the expansion of large-capacity memory.Multi-channel signal processing platform based on the OMAP-L138 is designed according to the comprehensive analysis that exist in traditional signal processing platform. The new platform is composed of control board and expansion board. Control board adopts the form of board-card which improves scalability and flexibility of the system. Expansion board has all kinds of interfaces in order to connect with other systems conveniently. OMAP-L138 adopts a dual-core structure which includes a ARM9 core and a C6748 DSP core. OMAP-L138 is compatible with fixed point and floating point. Floating point operati-ons can complete in a single cycle. The advantage is especially outstanding in realizing high-accuracy and complex algorithm which ensures the real-time algorithm processing. ARM9 core supports various operating systems which can implement the management of flies and scheduler. It controls the connection with other interface. ARM9 core improve processing ability and flexibility and anti-interfere ability as the core of control, processing and communications. The pins of OMAP-L138 are compatible with pins of C6748 DSP which can develop a variety of the products with different characteristics using different processors.The platform has good real-time, strong universality, excellent expandability and so on, which can meet the requirements of high-speed and real-time processing. It can be widely used in the field of digital signal processing, industry measurement and control areas.