| 基于MSP430F149的频率计设计 |
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| 引用本文： | 陈小忠,吴海涛,卢晓春,黄宁.基于MSP430F149的频率计设计[J].时间频率学报,2006,29(2):116-122. |
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| 作者姓名： | 陈小忠 吴海涛 卢晓春 黄宁 |
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| 作者单位： | 1. 中国科学院国家授时中心,陕西西安,710600;中国科学院研究生院,北京,100039
2. 中国科学院国家授时中心,陕西西安,710600 |
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| 摘 要： | 设计了一种以超低功耗单片机MSP430F149为控制器,以高速的CPLD(复杂可编程逻辑器件)实现32位计数的频率计。在设计中应用单片机的数学运算和控制功能,实现了测量时间闸门的自动选择,频率和周期的统一处理。此外,利用MSP430F149内部的高速模拟比较器,实现了对正弦波小信号的预处理,使得该频率计能够在较宽的频率范围和幅度范围内进行测量。
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| 关 键 词： | MSP430F149单片机 复杂可编程逻辑器件(CPLD) 频率计 |
| 文章编号： | 1001-1544（2006）02-0116-07 |
| 收稿时间： | 2006-08-17 |
| 修稿时间： | 2006-11-08 |
Design of MSP430F149-Based Frequency Counter |
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| CHEN Xiao-Zhong,WU Hai-Tao,LU Xiao-Chun,Huang Ning.Design of MSP430F149-Based Frequency Counter[J].Journal of Time and Frequency,2006,29(2):116-122. |
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| Authors: | CHEN Xiao-Zhong WU Hai-Tao LU Xiao-Chun Huang Ning |
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| Abstract: | A frequency counter is designed,in which an ultra-low-power microcontroller MSP430F149 is used as a controller and a high speed CPLD(complex programmable logic device) is used as a 32-bits counter.In the design the time gate can be selected automatically and both cycle and frequency can be measured by making use of the operation and control functions of microcontroller.In addition,the high-speed on-chip comparator of MSP430F149,being used to pre-treat the small sine wave signal,enable the frequency counter to measure signals at a wide range of frequency and voltage. |
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| Keywords: | microcontroller MSP430F149 CPLD(complex programmable logic device) frequen-cy counter |
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