用verilog实现数字频率计的设计，具有自动换挡功能，采用t法和m法设计，低频显示周期。量程为0.5~10Mhz。开发环境为quartus-This is a method of designing a digital frequency-measuring device. It can measure frequency ranging from 0.5Hz to 10MHz. It is developed in the program of Quartus.