考虑到只基于单片机的频率测量计设计主要是以单片机为基础，原理简单，但由于自身精度问题，测量的范围小。而基于FPGA和单片机结合的频率测量设计主要是以单片机作为系统的主控部件，FPGA完成对时序逻辑控制、计数功能，能较好的利用了FPGA的高精度、高速等方面的优势。-Taking into account only single-chip based on the frequency meter is based on single-chip design based on a simple principle, but because of their precision, the scope of measuring small. And single-chip FPGA-based integrated design of frequency measurement system based on single-chip microcomputer as the main components, FPGA logic control completion of the timing, counting function, can be a better use of FPGA high-precision, high-speed, etc. advantage.