基于FPGA和51单片机的频率计。其中FPGA仅负责计数和传输计数个数。单片机负责键盘控制、传输控制、数据处理和12864屏幕显示。FPGA程序简单，没有打包进来，此处仅提供单片机程序，在Keil中运行。-Based on FPGA and MCU 51 frequency meter. Which FPGA is only responsible for counting and transfer count number. SCM is responsible for keyboard control, transmission control, data processing and 12,864 screens. FPGA program is simple, not packaged come here only to provide SCM procedures, Keil at runtime.