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Based on DSP and CPLD programmable telemetry signal acquisition and Coding System

Author: JiangHui
Tutor: LiuYongCai
School: Huazhong University of Science and Technology
Course: Pattern Recognition and Intelligent Systems
Keywords: CPLD DSP Data collection Coding DMA McBSP
CLC: TP873
Type: Master's thesis
Year: 2005
Downloads: 500
Quote: 5
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Abstract


Through this paper, data acquisition technology research, design a set of technologies based on DSP and CPLD programmable telemetry signal acquisition and coding system . In this thesis, the PCM system is described in detail , and then combined with the system's technical requirements, proposed a complete technical solutions. The system consists of four modules: analog signal acquisition module , digital signal acquisition module , CPLD control module and DSP core processing module . DSP is the heart of the system is responsible for multi-channel analog signal and digital signal acquisition , storage and processing , and finally generate standard PCM data stream. CPLD required for each module to generate a decoding circuit and a control signal . Analog signal acquisition module and a digital signal acquisition module is the system interface with an external signal . The system chosen is a DSP chip TMS320VC5409, its high-speed processing capability can meet the system requirements. This paper details the DSP's two -chip peripherals - DMA controller and multi-channel buffered serial port McBSP. Since the on-chip peripherals via software settings , Therefore, the full use of these two peripherals can not only simplify the process of the encoded data output , and can reduce the data collection caused by the CPU load. CPLD 's highly integrated discrete components previously used to reduce the complexity of circuit design , simplifying the system hardware design and shorten the development cycle, improve system reliability and confidentiality, it 's ISP (In System Programming ) feature greatly facilitates the entire development process. DSP CPLD mode makes the system has a powerful programmable, can be very easy to change the system working state. CPLD expansion system can interface with an external signal , to improve the system data acquisition capabilities . DSP as the core of the system , so that the system can directly collect asynchronous serial digital signals. Moreover, through the preparation of a dedicated DSP applications , to achieve specific processing telemetry data for future application process to build a good platform . Test results show that the use of DSP and CPLD designed data collection and coding systems , coding errors fully meet the design requirements of the project , but also proved the feasibility of the selected papers and practicality . Finally, with the entire development phase of the problems encountered were lessons learned, and gives some suggestions and improvements .

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