| 基于单片机和CPLD的数字频率计设计 |
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| 引用本文： | 张青林.基于单片机和CPLD的数字频率计设计[J].合肥学院学报(自然科学版),2010,20(1):43-46. |
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| 作者姓名： | 张青林 |
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| 作者单位： | 安徽经济管理学院,计算机工程系,合肥,230051 |
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| 摘 要： | 介绍了以89552单片机和复杂可编程逻辑器件（CPLD）为核心的数字频率计的设计．利用CPLD来实现频率、周期、脉宽和占空比的测量计数；采用单片机完成测试控制、数据处理和显示输出．同时，运用等精度的设计方法，克服了基于传统测频原理的频率计的测量精度随被测信号频率的下降而降低的缺点．实验结果表明，所设计的数字频率计性能稳定、测量精度高．
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| 关 键 词： | 单片机 复杂可编程逻辑器件 数字频率计 等精度 |
Design of Digital Frequency Meter Based on Microcontroller and CPLD |
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| ZHANG Qing-lin.Design of Digital Frequency Meter Based on Microcontroller and CPLD[J].Journal of Hefei University :Natural Sciences,2010,20(1):43-46. |
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| Authors: | ZHANG Qing-lin |
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| Institution: | ZHANG Qing-lin ( Department of Computer Engineering, Anhui Economic Management Institute, Hefei 230051, China) |
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| Abstract: | The design of digital frequency meter, used 89S52 microcontroller and complex programmable logic device（CPLD） as the core, is proposed in this paper. CPLD is used to realize the measuring count of frequency, cycle, pulse width and duty cycle. Test control, data processing and display are completed by Microcontroller. Meanwhile, the equal-precision method is used to overcome the disadvantage that precision declines as measured signal frequency does, which is brought by the cymometer based on traditional measuring principle. Experimental results show that the digital frequency meter has stable performance and high precision. |
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| Keywords: | microcontroller complex programmable logic device digital frequency meter equalprecision |
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