The Design Of Image Acquisition System Bases On The TMS320VC5402

With the rapid development of micro-electronic technology, computer technology and communication technology, digital technology has been extensively used in national defense, science and technology in all fields of national economy. Even in social and personal life can be seen everywhere. The foundation and core of digital technology is the general digital signal processor (DSP) and the corresponding program software, it makes the DSP and its application occupies a special place in science and technology, national defense, economy, social and personal life. The greatest advantage of DSP lies in its ability to be repeat programmed. When various applications of digital signal processing technology in the form of software are downloaded to the DSP, corresponding communication and control functions can be achieved. The development and application of DSP makes software development and hardware design has become relatively independent, DSP is the core of digital signal processing and DSP hardware system has flexible programmability. Therefore, the development and application of DSP and it's software is the needs of today's scientific and social development.At first, this article analyzes the features of TMS320VC54X series of TI corporation and the principle of static image coding (JPEG).Then introduce the hardware implementation of the collection and storage of the image acquisition system and software implementation of the JPEG compression algorithm: 1, DSP simulates 12C bus protocol to initialize SAA7111AHz (Video A/D conversion chip, which can convert simulated input video signals to 16-bit digital signal, field synchronization signals,row synchronization signals and pixel dock signal can be extracted; 2. SAA7111AHz exports field synchronous signal VREF,row synchronous signal HREF,odd and even field signal RTS0,pixel clock signal LLC2 are sent to the CPLD (EPM7128, programmable logic device). Based on these signal, CPLD produces chip selection signals (CS),read/write (R/W) control signal and storage addresses which data memorizer SRAM(CY7C1011, 128K x 16 static read-only memorizer) needs and storages the image data; 3,DSP can compression the image data which be memorized in SRAM.Finally, give my view to the problem in system and improve methods.