FPGA等精度测频程序，能测1hz到100Mhz的频率，自动计算占空比，自动转换量程，只有一百万分之一的误差，是课程实际的优秀作品。-FPGA and other precision frequency measurement procedures can be measured of 1hz to the 100Mhz frequency, and automatically calculates the duty cycle, automatic conversion range, only