本系统采用了以Altera芯片EPF10K10LC84-4和单片机仿真器伟福H51/S POD-H8X5X 为核心，同时辅有8位七段数码管和7219数码管驱动芯片。设计使用max+plus2，keil3和伟福开发环境，其中FPGA计数功能，FPGA与单片机的接口通信，单片机计算数据并驱动显示模块等功能。

　　系统实现了4hz~12Mhz频率的测量，并利用科学计数法显示。测量相对误差在0.005 以内，每个频段均显示6位有效数字。

　　本系统的特点在于高精度，显示界面科学友好。硬件部分VHDL语言描述简洁明快，单片机C语言算法仔细精巧。



关键词：等精度，频率计，FPGA,单片机

　　-This system USES to EPF10K10LC84-4 and Altera chip microcontroller simulators weifu H51/S POD-H8X5X as the core, and auxiliary has eight seven period of digital the and 7219 digital tube drive chip. Design the Max+ plus2, keil3 and weifu development environment, including FPGA count function, FPGA and single-chip microcomputer interface communication, single chip computer data and drive display module etc. Function.

The system realizes the 4 hz ~ 12 Mhz frequency measurement, and use of scientific notation display. Measuring relative error within 0.005 , each frequency band all showed that six effective digital.

This system is characterized by high precision, display interface science friendly. Hardware VHDL language descr iption is concise and lively, SCM C language carefully algorithm is exquisite.



Key words:, accuracy, the frequency meter, FPGA, microcontroller