这是一个基于可编程逻辑器件的程序，用来实现自动转换量程频率计控制器，该程序在可以再仿真器上仿真实现-This is a programmable logic device based on the procedures used to automatically convert the frequency range of the controller, the program can be in the simulation simulator

基于ARM7与FPGA组成的可编程控制器-Based on the composition of ARM7 and FPGA programmable logic controller

锁存器用于可编程控制器编码用的，其实我也不大懂，照书写的，有怪莫怪-Latches used for the programmable logic controller code, in fact, I do not quite understand, according to writing, there are strange No wonder, then