2015年全国大学生电子设计竞赛设计报告数字频率计（F题）2015年 8月 15日摘要该装置用于测量时间参数，主要由前级信号放大电路，FPGA信号处理电路，STM32控制电路，12864液晶显示模块等组成。前端的信号经过放大、比较后，由 FPGA进行处理与测量，并将数据发送给STM32单片机，最后单片机控制液晶 12864将结果显示。设计中使用 FPGAALTERA II EP2C8F256C8进行测量，采用 50MHZ高精度温补晶振作为时间量度，使用等精度测量的方法，大大提高测了量的精度关键词:频率计等精度测量 FPGASTM32AbstractThe design device is used to measure time, mainly by the front stage signalamplifier circuit, FPGA signal processing circuit, STM32 control circuit, 12864 LCDmodule and so on. The front end of the signal after amplification, comparison, andthen sent to the FPGA for processing and measurement and the data sent to theSTM32 microcontroller, and finally the results show that the microcontroller LCD12864. Design using FPGA of Altera II EP2C8F256C8 were measured, the 50MHzhigh precision temperature compensated crystal oscillator as a measure of time, theuse of precision measuring method, greatly improving measurement accuracyKey words: Frequency meterEqually accurate measurementSTM32FPGA目录1系统方案.....