Based On Programmable Logical Device Logical Analyzer Essential Technology Research

The subway electrically operated train after moves for several years toneed to carry on the examination to the above many plug-in units board, byguarantees the electrically operated train operation the security and thereliability. After for example Shanghai subway on-line the operation DC01electrically operated train passes through several years operation use, TCU(draft control unit) the center many plug-in units board all has broken down.The existing detector set namely complex expensive, the sur-component multi-compatibility quite are bad, moreover in the data acquisition module purchasedata acquisition card operating frequency could not but nimbly change along withthe actual gathering signal change, has limited the data processing effect. This article has developed one kind based on this project based on the FPGAchip logic analysis installment, this equipment not only has enriched the datasampling frequency, moreover raised the original equipment use factor greatly,reduced the repetition investment, enhanced the installment overall performance,the compatibility better, the cost also reduced, also changed in view of thecustomer application simply, expanded is more convenient。This equipment notonly may use in the industry scene test, also may take the expensive logicalanalyzer substitution under the laboratory condition。 This equipment may at the same time survey the multichannel digital signaland the multichannel simulated signal, some four kind of sampling frequency,four kinds trigger the channel, five kinds trigger the way, four kind of samplingpass the magical skill, four kind of sampling depths may for the user choice,and may to survey the data to carry on the profile demonstration and the memoryon PC machine. When design logic analysis installment hardware part, uses basedon the platform SOC design mentality, unifies the EDA technology top-down designthought the hardware partial instructions identification circuit, the frequencyproduction electric circuit, triggers the electric circuit, sampling module andso on storage circuit, signal switching circuit and control circuit designs intothe description IP nucleus which comes with Verilog HDL, carries on thesuccession simulation and the synthesis to the module, then in system rank eachmodule organic synthesis in together, again is joined to the simple peripheryelectric circuit, formed to have the logic analysis function the installment.Moreover this article has also designed a PC contact surface software. Thecontact surface software function is partially carries on the control, thedemonstration analysis result to the hardware. The design process used theobject-oriented programming thought to complete by the micro computer, like thisexpanded the logic analysis installment analysis ability and the computationability, caused its versatile enhancement.