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1、III基于FPGA的頻率測量儀的設(shè)計摘要頻率計是實驗室、計量室和科研、生產(chǎn)中最常用的測量儀器之一。頻率計符合目前測量儀器的發(fā)展趨勢，具有測量精確、自動化和數(shù)字化程度高、成本低、體積小及操作簡單等特點(diǎn)。在傳統(tǒng)的電子測量儀器中，示波器在進(jìn)行頻率測量時測量精度較低，誤差較大。頻譜儀可以準(zhǔn)確的測量頻率并顯示被測信號的頻譜，但測量速度較慢，無法實時快速的跟蹤捕捉到被測信號頻率的變化。正是由于頻率計能夠快速準(zhǔn)確的捕捉到被測信號頻率的變化，因此，頻率計擁有非常廣泛的應(yīng)用范圍。本頻率測量儀是以Altera公司生產(chǎn)的FLEX
2、10KA器件為核心實現(xiàn)高精度計數(shù)功能，AT89S52單片機(jī)為輔實現(xiàn)算術(shù)運(yùn)算及顯示功能的頻率計。整個電路采用模塊化設(shè)計，設(shè)計，調(diào)試制作方便。關(guān)鍵詞：FLEX10KA，計數(shù)，AT89S52IIIFPGA-basedFrequencyMeasurementInstrumentABSTRACTFrequencycounterisalaboratorymeasurementofroom,andscientificresearch,productionofoneofthemostcommonlyusedmeasurin
3、ginstruments.Frequencymetermeasuringinstrumentscomplywiththecurrentdevelopmenttrend,withmeasurementprecision,ahighdegreeofautomationanddigital,lowcost,smallsizeandsimpleoperation.Inthetraditionalelectronicmeasuringinstruments,theoscilloscopeduringlowfreque
4、ncymeasurementaccuracy,bias.Spectrumanalyzercanaccuratelymeasurethefrequencyanddisplaysthemeasuredsignalspectrum,butthemeasurementslowandcannotcapturereal-timetrackingfastchangesinthemeasuredsignalfrequency.Itisbecauseofthefrequencymetercanbemeasuredquickl
5、yandaccuratelycapturethesignalfrequencychanges,therefore,frequencymeterhasaverywiderangeofapplications.ThefrequencymeterisproducedFLEX10KAAlteradeviceasthecoretoachievehigh-precisioncounting,AT89S52microcontroller,supplementedtoachievearithmeticoperationsa
6、nddisplaythefrequencycounter.Modulardesignofthecircuit,design,productiontofacilitatedebugging.KEYWORDS：FLEX10KA,count,AT89S52III目錄摘要………………………………………………………………………………………ⅠABSTRACT…………………………………………………………………………………Ⅱ1緒論………………………………………………………………………………………11.1課題提出的背景………
7、………………………………………………………………11.2課題選擇的意義………………………………………………………………………22EDA簡介……………………………………………………………………………………32.1EDA開發(fā)過程…………………………………………………………………………32.1.1設(shè)計輸入…………………………………………………………………………32.1.2HDL綜合…………………………………………………………………………32.1.3適配………………………………………………………………………………4
8、2.1.4仿真………………………………………………………………………………42.1.5編程下載和硬件測試……………………………………………………………42.2FPGA的結(jié)構(gòu)和工作原理……………………………………………………………42.3硬件描述語言…………………………………………………………………………52.4EDA開發(fā)軟件…………………………………………………………………………53課題的方案選擇……………………
