【摘要】：隨著紅外探測技術的迅猛發(fā)展,圖像采集系統(tǒng)對數(shù)據(jù)的大容量存儲、快速吞吐和接口可靠性互聯(lián)提出了更高的設計要求。為了實現(xiàn)對紅外探測器的功能測試,設計了一種大容量數(shù)據(jù)高速存儲采集與控制的模塊,本文主要探討數(shù)據(jù)高速存儲、通用接口互聯(lián)以及FPGA的可靠性設計。為了實現(xiàn)大容量數(shù)據(jù)的可靠高速存儲,本文設計了基于FPGA的NAND Flash高速大容量存儲架構。首先,利用NAND Flash各邏輯單元獨立操作的特性,設計了基于4邏輯單元NAND Flash的片內流水線的存儲結構;之后,通過并行流轉的方法設計了CameraLink、PXI接口到Flash的數(shù)據(jù)傳輸緩存控制單元,實現(xiàn)多片F(xiàn)lash的并行讀寫控制;最后,設計了提高尋址效率的Flash無效塊管理方案。為了實現(xiàn)采集模塊與計算機的通用互聯(lián),解決高速圖像采集控制卡在分時操作系統(tǒng)(Windows)下實時性差、不穩(wěn)定、控制復雜等問題,設計了基于嵌入式實時操作系統(tǒng)Vx Works的PXI總線控制接口。由PCI9054實現(xiàn)PXI總線的本地端邏輯,結合VxWorks中PXI設備驅動的特點,開發(fā)了可移植的計算機軟件控制接口。通過DMA控制,數(shù)據(jù)在模塊與計算機之間高速傳輸。針對測試中出現(xiàn)的亞穩(wěn)態(tài)的情況,分別從時鐘設計與相位控制、雙鎖存器設計、復位處理和描述語言風格狀態(tài)機幾方面提出了可行的設計,提高了FPGA設計的可靠性。通過搭建Vx Works測試平臺,對各項設計指標和功能進行了測試,模塊能夠實現(xiàn)對50MHz/16Bit紅外圖像數(shù)據(jù)的連續(xù)高速可靠存取,通過PXI總線數(shù)據(jù)讀取速度達到33MB/s,模塊工作可靠穩(wěn)定。
[Abstract]:With the rapid development of infrared detection technology, the image acquisition system has put forward higher design requirements for large capacity data storage, fast throughput and interface reliability interconnection. In order to test the function of infrared detector, a module of high speed storage and control of large capacity data is designed. This paper mainly discusses the design of high speed data storage, general interface interconnection and reliability design of FPGA. In order to realize the reliable high-speed storage of large-capacity data, the NAND Flash high-speed and large-capacity storage architecture based on FPGA is designed in this paper. Firstly, the on-chip pipeline storage structure based on 4 logic unit (NAND Flash) is designed by using the independent operation of each logic unit of NAND Flash. After that, the data transfer buffer control unit from CameraLink,PXI interface to Flash is designed by parallel flow method to realize the parallel reading and writing control of multiple Flash. Finally, a Flash invalid block management scheme is designed to improve the addressing efficiency. In order to realize the universal interconnection between the acquisition module and the computer, the high-speed image acquisition and control card can solve the problems of poor real-time, unstable and complex control under the time-sharing operating system (Windows). The PXI bus control interface based on embedded real-time operating system Vx Works is designed. The local logic of PXI bus is realized by PCI9054. Combining with the characteristics of PXI device driver in VxWorks, a portable computer software control interface is developed. Through the DMA control, the data is transmitted between the module and the computer at high speed. In view of the metastable state in the test, the feasible design is put forward from the aspects of clock design and phase control, double latch design, reset processing and description language style state machine, which improves the reliability of FPGA design. By setting up the Vx Works test platform, the design indexes and functions are tested. The module can realize the continuous high-speed and reliable access to the 50MHz/16Bit infrared image data, and the reading speed of the 50MHz/16Bit infrared image data through the PXI bus can reach 33MB / s. The module works reliably and stably.
【學位授予單位】：中北大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN215;TP274.2

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本文編號：2296199