做过的课程设计，便携式频率计，采用中断方式采样频率，现在高精度的频率采样显示，能实现频率测量的简便设备的作用。包括程序和proteus仿真。功能做成实物，能很好实现频率计量显示。-Curriculum design done, interrupt the sampling frequency, the sampling frequency is now displayed precision, to achieve the role of simple frequency measuremen