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Design of a High Precision Frequency Meter Based on MCU and CPLD

Ouyang Qiao

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Abstract

It introduces how to design a multifunctional cymometer circuit which is controlled by a MCU,using CPLD to measure frequency and take counting.With design of equal precision,the cymometer avoids traditional cymometer's defect that precision will get worse as the frequency measured decline,because it uses CPLD to measure frequency,period,pulse width and duty ratio,and used MCU to do testing control and data processing of the whole circuit;and display output is done by CPLD.

About this research paper

What this paper is about

It introduces how to design a multifunctional cymometer circuit which is controlled by a MCU,using CPLD to measure frequency and take counting.With design of equal precision,the cymometer avoids traditional cymometer's defect that precision will get worse as the frequency measured decline,because it uses CPLD to measure frequency,period,pulse width and duty ratio,and used MCU to do testing control and data processing of the whole circuit;and display output is done by CPLD.

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Available abstract

It introduces how to design a multifunctional cymometer circuit which is controlled by a MCU,using CPLD to measure frequency and take counting.With design of equal precision,the cymometer avoids traditional cymometer's defect that precision will get worse as the frequency measured decline,because it uses CPLD to measure frequency,period,pulse width and duty ratio,and used MCU to do testing control and data processing of the whole circuit;and display output is done by CPLD.

Key concepts: Complex programmable logic device, Microcontroller, Measure (data warehouse), Computer hardware, Duty cycle, Computer science, Pulse-width modulation, Electronic engineering

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